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Ou W, Tao C, Zhang Y, Gan M, Xie Y, Wu Y, Zheng X, Shu B, Duan G, Xu F. Effects of postoperative environmental noise on surgery induced pain: Evidence based on a prospective observational study. Gen Hosp Psychiatry 2024; 88:61-67. [PMID: 38508077 DOI: 10.1016/j.genhosppsych.2024.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/13/2024] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
CONTEXT Many patients recovering from surgery in wards are disturbed by environmental noise. However, the effects of environmental noise on postoperative pain are unclear. OBJECTIVES This study aimed to assess the association between postoperative noise and pain. METHODS This prospective study included 182 women who underwent cesarean sections. Postoperative noise was continuously recorded, and pain intensity at rest was assessed using a numerical rating scale (NRS) for 0-6, 6-12, 12-18, and 18-24 h after the patients were returned to the ward. Cumulative pain scores were calculated by summing the NRS scores at each time point and comprised the primary outcome. The maximum pain NRS score and analgesic consumption during the 24 h after surgery were also recorded. RESULTS Mean environmental noise intensity during the daytime was an independent factor for cumulative pain scores, maximum pain scores, and analgesic use during the first postoperative 24 h (β, 0.37; 95% CI, 0.21-0.53 and β, 0.12; 95% CI, 0.07-0.17; P < 0.001 for both; β, 0.86; 95% CI, 0.25-1.46; P = 0.006). Cumulative and maximum NRS pain scores as well as the incidence of NRS ≥ 4 were significantly higher in patients under mean daytime environmental noise of ≥58, than <58 decibels (dB) (8.0 [6.0-11.3] vs. 6.0 (5.0-7.0); 3.0 [2.0-4.0] vs. 2.0 [2.0-2.0, and 25.6% vs. 11.0%; RR, 2.32; 95% CI, 1.19-4.54, respectively; P < 0.001 for all). CONCLUSIONS Higher-level postoperative noise exposure was associated with more severe postoperative pain and increased analgesic needs, as well as a higher incidence of moderate-to-severe pain in patients recovering from cesarean delivery. Our findings indicate that reducing environmental ward noise might benefit for postoperative pain management.
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Affiliation(s)
- Wenjun Ou
- Department of Gynaecology and Obstetrics, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Chengkun Tao
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Yang Zhang
- Department of Gynaecology and Obstetrics, Linshui Branch of The Second Affiliated Hospital of Chongqing Medical University, Sichuan, China
| | - Min Gan
- Department of Gynaecology and Obstetrics, Linshui Branch of The Second Affiliated Hospital of Chongqing Medical University, Sichuan, China
| | - Yan Xie
- Department of Gynaecology and Obstetrics, Linshui Branch of The Second Affiliated Hospital of Chongqing Medical University, Sichuan, China
| | - Yingcai Wu
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Xuemei Zheng
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Bin Shu
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Guangyou Duan
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China.
| | - Fang Xu
- Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China.
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Luan L, Liu N, Zheng BF, Zhang ZY, Song YF, Li L, Gan M, Cao L, Huang ZY, Ye JK, Zhang ZN, Liu XX, Chen JL, Wang CS, Cai B, Yu WZ. [Thoughts and suggestions on digital services to enhance the level of vaccination management]. Zhonghua Yu Fang Yi Xue Za Zhi 2024; 58:159-165. [PMID: 38387944 DOI: 10.3760/cma.j.cn112150-20231012-00262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
With the development of information technology and the increasing demand for vaccination services among the people, it is a definite trend to enhance the quality of vaccination services through digitization. This article starts with a clear concept of digital services for vaccination, introduces the current development status in China and abroad, analyzes the advantages and disadvantages of existing models in leading regions, takes a glean from the summation, and proposes targeted solutions. This study suggests establishing a departmental coordination mechanism for data interconnection and sharing, formulating data standards and functional specifications, enhancing the functionalities of the immunization planning information system, strengthening data collection and analytical usage, and intensifying appointment management and science and health education to provide expert guidance for the construction of digital vaccination services across the country in the future.
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Affiliation(s)
- L Luan
- Department of Immunization Program, Suzhou Center for Disease Control and Prevention, Suzhou 215004, China
| | - N Liu
- Department of Immunization Program, Suzhou Center for Disease Control and Prevention, Suzhou 215004, China
| | - B F Zheng
- Department of Immunization Program, Suzhou Center for Disease Control and Prevention, Suzhou 215004, China
| | - Z Y Zhang
- School of Public Health, Nanjing Medical University, Nanjing 211112, China
| | - Y F Song
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - L Li
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - M Gan
- Institute of Immunization Program, Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning 530028, China
| | - L Cao
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Z Y Huang
- Institute of Immunization Program, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - J K Ye
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Z N Zhang
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - X X Liu
- Institute of Immunization Program, Jinan Center for Disease Control and Prevention, Jinan 250021, China
| | - J L Chen
- Institute of Immunization Program, Fujian Provincial Center for Disease Control and Prevention, Fuzhou 350012, China
| | - C S Wang
- Institute of Immunization Program, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China
| | - B Cai
- Institute of Immunization Program, Hubei Provincial Center for Disease Control and Prevention, Wuhan 430079, China
| | - W Z Yu
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
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3
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Fan G, Gan M, Fan B, Chen CLP. Multiscale Cross-Connected Dehazing Network With Scene Depth Fusion. IEEE Trans Neural Netw Learn Syst 2024; 35:1598-1612. [PMID: 35776818 DOI: 10.1109/tnnls.2022.3184164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this article, we propose a multiscale cross-connected dehazing network with scene depth fusion. We focus on the correlation between a hazy image and the corresponding depth image. The model encodes and decodes the hazy image and the depth image separately and includes cross connections at the decoding end to directly generate a clean image in an end-to-end manner. Specifically, we first construct an input pyramid to obtain the receptive fields of the depth image and the hazy image at multiple levels. Then, we add the features of the corresponding dimensions in the input pyramid to the encoder. Finally, the two paths of the decoder are cross-connected. In addition, the proposed model uses wavelet pooling and residual channel attention modules (RCAMs) as components. A series of ablation experiments shows that the wavelet pooling and RCAMs effectively improve the performance of the model. We conducted extensive experiments on multiple dehazing datasets, and the results show that the model is superior to other advanced methods in terms of peak signal-to-noise ratio (PSNR), structural similarity (SSIM), and subjective visual effects. The source code and supplementary are available at https://github.com/CCECfgd/MSCDN-master.
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Su JN, Gan M, Chen GY, Guo W, Chen CLP. High-Similarity-Pass Attention for Single Image Super-Resolution. IEEE Trans Image Process 2024; 33:610-624. [PMID: 38190673 DOI: 10.1109/tip.2023.3348293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Recent developments in the field of non-local attention (NLA) have led to a renewed interest in self-similarity-based single image super-resolution (SISR). Researchers usually use the NLA to explore non-local self-similarity (NSS) in SISR and achieve satisfactory reconstruction results. However, a surprising phenomenon that the reconstruction performance of the standard NLA is similar to that of the NLA with randomly selected regions prompted us to revisit NLA. In this paper, we first analyzed the attention map of the standard NLA from different perspectives and discovered that the resulting probability distribution always has full support for every local feature, which implies a statistical waste of assigning values to irrelevant non-local features, especially for SISR which needs to model long-range dependence with a large number of redundant non-local features. Based on these findings, we introduced a concise yet effective soft thresholding operation to obtain high-similarity-pass attention (HSPA), which is beneficial for generating a more compact and interpretable distribution. Furthermore, we derived some key properties of the soft thresholding operation that enable training our HSPA in an end-to-end manner. The HSPA can be integrated into existing deep SISR models as an efficient general building block. In addition, to demonstrate the effectiveness of the HSPA, we constructed a deep high-similarity-pass attention network (HSPAN) by integrating a few HSPAs in a simple backbone. Extensive experimental results demonstrate that HSPAN outperforms state-of-the-art approaches on both quantitative and qualitative evaluations. Our code and a pre-trained model were uploaded to GitHub (https://github.com/laoyangui/HSPAN) for validation.
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5
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Fan J, Huang L, Gong C, You Y, Gan M, Wang Z. KMT-PLL: K-Means Cross-Attention Transformer for Partial Label Learning. IEEE Trans Neural Netw Learn Syst 2024; PP:1-12. [PMID: 38194387 DOI: 10.1109/tnnls.2023.3347792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Partial label learning (PLL) studies the problem of learning instance classification with a set of candidate labels and only one is correct. While recent works have demonstrated that the Vision Transformer (ViT) has achieved good results when training from clean data, its applications to PLL remain limited and challenging. To address this issue, we rethink the relationship between instances and object queries to propose K-means cross-attention transformer for PLL (KMT-PLL), which can continuously learn cluster centers and be used for downstream disambiguation tasks. More specifically, K-means cross-attention as a clustering process can effectively learn the cluster centers to represent label classes. The purpose of this operation is to make the similarity between instances and labels measurable, which can effectively detect noise labels. Furthermore, we propose a new corrected cross entropy formulation, which can assign weights to candidate labels according to the instance-to-label relevance to guide the training of the instance classifier. As the training goes on, the ground-truth label is progressively identified, and the refined labels and cluster centers in turn help to improve the classifier. Simulation results demonstrate the advantage of the KMT-PLL and its suitability for PLL.
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Zhang N, Tan Z, Wei J, Zhang S, Liu Y, Miao Y, Ding Q, Yi W, Gan M, Li C, Liu B, Wang H, Zheng Z. Identification of novel anti-ZIKV drugs from viral-infection temporal gene expression profiles. Emerg Microbes Infect 2023; 12:2174777. [PMID: 36715162 PMCID: PMC9946313 DOI: 10.1080/22221751.2023.2174777] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Zika virus (ZIKV) infections are typically asymptomatic but cause severe neurological complications (e.g. Guillain-Barré syndrome in adults, and microcephaly in newborns). There are currently no specific therapy or vaccine options available to prevent ZIKV infections. Temporal gene expression profiles of ZIKV-infected human brain microvascular endothelial cells (HBMECs) were used in this study to identify genes essential for viral replication. These genes were then used to identify novel anti-ZIKV agents and validated in publicly available data and functional wet-lab experiments. Here, we found that ZIKV effectively evaded activation of immune response-related genes and completely reprogrammed cellular transcriptional architectures. Knockdown of genes, which gradually upregulated during viral infection but showed distinct expression patterns between ZIKV- and mock infection, discovered novel proviral and antiviral factors. One-third of the 74 drugs found through signature-based drug repositioning and cross-reference with the Drug Gene Interaction Database (DGIdb) were known anti-ZIKV agents. In cellular assays, two promising antiviral candidates (Luminespib/NVP-AUY922, L-161982) were found to reduce viral replication without causing cell toxicity. Overall, our time-series transcriptome-based methods offer a novel and feasible strategy for antiviral drug discovery. Our strategies, which combine conventional and data-driven analysis, can be extended for other pathogens causing pandemics in the future.
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Affiliation(s)
- Nailou Zhang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Zhongyuan Tan
- The Joint Laboratory for Translational Precision Medicine, a. Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, People's Republic of China and b. Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, People's Republic of China
| | - Jinbo Wei
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Sai Zhang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Yan Liu
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Yuanjiu Miao
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Qingwen Ding
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Wenfu Yi
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Min Gan
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Chunjie Li
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Bin Liu
- Characteristic Medical Center of Chinese People’s Armed Police Forces, Tianjin, People’s Republic of China
| | - Hanzhong Wang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China
| | - Zhenhua Zheng
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People’s Republic of China, Zhenhua Zheng CAS Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan430071, People’s Republic of China
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7
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You S, Lei B, Wang S, Chui CK, Cheung AC, Liu Y, Gan M, Wu G, Shen Y. Fine Perceptive GANs for Brain MR Image Super-Resolution in Wavelet Domain. IEEE Trans Neural Netw Learn Syst 2023; 34:8802-8814. [PMID: 35254996 DOI: 10.1109/tnnls.2022.3153088] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Magnetic resonance (MR) imaging plays an important role in clinical and brain exploration. However, limited by factors such as imaging hardware, scanning time, and cost, it is challenging to acquire high-resolution MR images clinically. In this article, fine perceptive generative adversarial networks (FP-GANs) are proposed to produce super-resolution (SR) MR images from the low-resolution counterparts. By adopting the divide-and-conquer scheme, FP-GANs are designed to deal with the low-frequency (LF) and high-frequency (HF) components of MR images separately and parallelly. Specifically, FP-GANs first decompose an MR image into LF global approximation and HF anatomical texture subbands in the wavelet domain. Then, each subband generative adversarial network (GAN) simultaneously concentrates on super-resolving the corresponding subband image. In generator, multiple residual-in-residual dense blocks are introduced for better feature extraction. In addition, the texture-enhancing module is designed to trade off the weight between global topology and detailed textures. Finally, the reconstruction of the whole image is considered by integrating inverse discrete wavelet transformation in FP-GANs. Comprehensive experiments on the MultiRes_7T and ADNI datasets demonstrate that the proposed model achieves finer structure recovery and outperforms the competing methods quantitatively and qualitatively. Moreover, FP-GANs further show the value by applying the SR results in classification tasks.
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Zhang K, Zhang S, Liao P, Zhao Y, Gan M, Zhu J. Impact of redox fluctuations on microbe-mediated elemental sulfur disproportionation and coupled redox cycling of iron. Water Res 2023; 245:120589. [PMID: 37708773 DOI: 10.1016/j.watres.2023.120589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/16/2023]
Abstract
Elemental sulfur (S0) plays a vital role in the coupled cycling of sulfur and iron, which in turn affects the transformation of carbon and various pollutants. These processes have been well characterized under static anoxic or oxic conditions, however, how the natural redox fluctuations affect the bio-mediated sulfur cycling and coupled iron cycling remain enigmatic. The present work examined S0 disproportionation as driven by natural microbial communities under fluctuating redox conditions and the contribution of S0 disproportionation to ferrihydrite transformation. Samples were incubated at either neutral or alkaline pH values, applying sequential anaerobic, aerobic and anaerobic conditions over 60 days. Under anaerobic conditions, S0 was found to undergo disproportionation to sulfate and sulfide, which subsequently reduced ferrihydrite at both pH 7.4 and 9.5. Ferrihydrite promoted S0 disproportionation by scavenging biogenic sulfide and maintaining a suitable degree of sulfate formation. After an oxic period, during the subsequent anoxic incubation, bioreduction of sulfate occurred and the biogenic sulfide reduced iron (hydr)oxides at a rate approximately 25 % lower than that observed during the former anoxic period. A 16S rDNA-based microbial community analysis revealed changes in the microbial community in response to the redox fluctuations, implying an intimate association with the coupled cycling of sulfur and iron. Microscopic and spectroscopic analyses confirmed the S0-mediated transformation of ferrihydrite to crystalline iron (hydr)oxide minerals such as lepidocrocite and magnetite and the formation of iron sulfides precipitated under fluctuating redox conditions. Finally, a reaction mechanism based on mass balance was proposed, demonstrating that bio-mediated sulfur transformation maintained a sustainable redox reaction with iron (hydr)oxides under fluctuating anaerobic-aerobic-anaerobic conditions tested in this study. Altogether, the finding of our study is critical for obtaining a more complete understanding of the dynamics of iron redox reactions and pollutant transformation in sulfur-rich aquatic environments.
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Affiliation(s)
- Ke Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, PR China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China
| | - Shaojian Zhang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China
| | - Peng Liao
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China.
| | - Yuanxin Zhao
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, PR China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, PR China.
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Huang J, Yin J, Chen J, Gan M, Zhang Z, Tian T, Fei L. Dynamic Observations on Formation of Coffee-Ring Structures from the Degradation of Cesium Lead Halide Perovskite Nanocrystals. J Phys Chem Lett 2023; 14:8563-8570. [PMID: 37724994 DOI: 10.1021/acs.jpclett.3c02166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Nanomaterials of halide perovskites have attracted increasing attention for their remarkable potential in optoelectronic devices, but their instability to environmental factors is the core issue impeding their applications. In this context, the microscopic understanding of their structural degradation mechanisms upon external stimuli remains incomplete. Herein, we took an emerging member of this material family, Cs4PbBr6 nanocrystals (NCs), as an example and investigated the degradation pathways as well as underlying mechanisms under an electron beam by using in situ transmission electron microscopy. Our atomic-scale study identified the distinct degradation stages for the NCs toward interesting coffee-ring PbBr2 structures, which are caused by the organic surface capping agents as well as surface energy of NCs. Our findings present a fundamental insight for the degradation of halide perovskite NCs and may provide indispensable guidance for their structural design and stability improvement.
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Affiliation(s)
- Jiawei Huang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Jialin Yin
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Jiaqi Chen
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Min Gan
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Zhouyang Zhang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Tingfang Tian
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Linfeng Fei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
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Tian Y, Yi S, Guo W, Feng C, Zhang X, Dong H, Wang K, Li R, Tian Y, Gan M, Wu T, Xie H, Gao X. SYNJ1 rescues motor functions in hereditary and sporadic Parkinson's disease mice by upregulating TSP-1 expression. Behav Brain Res 2023; 452:114569. [PMID: 37419331 DOI: 10.1016/j.bbr.2023.114569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/19/2023] [Accepted: 07/03/2023] [Indexed: 07/09/2023]
Abstract
This study aimed to explore the role of SYNJ1 in Parkinson's disease (PD) and its potential as a neuroprotective factor. We found that SYNJ1 was decreased in the SN and striatum of hSNCA*A53T-Tg and MPTP-induced mice compared to normal mice, associated with motor dysfunction, increased α-synuclein and decreased tyrosine hydroxylase. To investigate its neuroprotective effects, SYNJ1 expression was upregulated in the striatum of mice through injection of the rAdV-Synj1 virus into the striatum, which resulted in the rescue of behavioral deficiencies and amelioration of pathological changes. Subsequently, transcriptomic sequencing, bioinformatics analysis and qPCR were conducted in SH-SY5Y cells following SYNJ1 gene knockdown to identify its downstream pathways, which revealed decreased expression of TSP-1 involving extracellular matrix pathways. The virtual protein-protein docking further suggested a potential interaction between the SYNJ1 and TSP-1 proteins. This was followed by the identification of a SYNJ1-dependent TSP-1 expression model in two PD models. The coimmunoprecipitation experiment verified that the interaction between SYNJ1 and TSP-1 was attenuated in 11-month-old hSNCA*A53T-Tg mice compared to normal controls. Our findings suggest that overexpression of SYNJ1 may protect hSNCA*A53T-Tg and MPTP-induced mice by upregulating TSP-1 expression, which is involved in the extracellular matrix pathways. This suggests that SYNJ1 could be a potential therapeutic target for PD, though more research is needed to understand its mechanism.
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Affiliation(s)
- Yueqin Tian
- Department of Neurology, Zhujiang Hospital, Southern Medical University, No. 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Shang Yi
- Department of Neurology, Zhujiang Hospital, Southern Medical University, No. 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Wanyun Guo
- Department of Pediatric Neurology, Zhujiang Hospital, Southern Medical University, 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Cuilian Feng
- Department of Pediatric Neurology, Zhujiang Hospital, Southern Medical University, 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Xiufen Zhang
- Department of Pediatric Neurology, Zhujiang Hospital, Southern Medical University, 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Huateng Dong
- Department of Pediatric Neurology, Zhujiang Hospital, Southern Medical University, 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Kaitao Wang
- Department of Neurology, Zhujiang Hospital, Southern Medical University, No. 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Runtong Li
- Department of Neurology, Zhujiang Hospital, Southern Medical University, No. 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China
| | - Yuanxin Tian
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Min Gan
- Department of Pediatric Neurology, Zhujiang Hospital, Southern Medical University, 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China.
| | - Ting Wu
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, PR China.
| | - Haiting Xie
- Department of Neurology, Zhujiang Hospital, Southern Medical University, No. 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China.
| | - Xiaoya Gao
- Department of Neurology, Zhujiang Hospital, Southern Medical University, No. 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China; Department of Pediatric Neurology, Zhujiang Hospital, Southern Medical University, 253 Gongye Avenue, Guangzhou, Guangdong 510282, PR China.
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Tang Q, Xing J, Fan X, Sun Z, Gan M, Ji Z, Huang X. Oily cold rolling mill sludge conditioned by quicklime to improve dewatering performance: optimization and mechanism study. Environ Sci Pollut Res Int 2023; 30:91125-91139. [PMID: 37470976 DOI: 10.1007/s11356-023-28430-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 06/21/2023] [Indexed: 07/21/2023]
Abstract
Dewatering is critical to oily cold rolling mill (CRM) sludge treatment. Therefore, finding an efficient, energy-saving, and applicable dewatering technology for oily CRM sludge is still urgent. This study investigated the performance of quicklime as a conditioning agent for oily CRM sludge conditioning and dewatering. The interactive effects of quicklime dosage, temperature, and time on filter cake's specific resistance to filtration (SRF) and the dewatering rate of oily CRM sludge were studied by response surface methodology (RSM). The optimal parameters for conditioning oily CRM sludge were quicklime dosage of 18.7%, temperature of 54 °C, and time of 43.3 min, which resulted in filter cake SRF of 0.50 × 1010 m/kg and dewatering rate of 61.2%. The viscosity of oily CRM sludge could be reduced by 90% after conditioned with quicklime, which caused by the neutralization or hydrolysis of high viscosity organic matter in the oil phase with quicklime to produce low viscosity organic matter. The study indicated the excellent performance of quicklime as a conditioning agent for oily CRM sludge treatment and provided an effective route for the recycling of the oily CRM sludge for steel production.
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Affiliation(s)
- Qingyu Tang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
| | - Jinxin Xing
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
| | - Xiaohui Fan
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
| | - Zengqing Sun
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
| | - Zhiyun Ji
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
| | - Xiaoxian Huang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
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12
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Liu L, Fan X, Gan M, Sun Z, Ji Z, Wei J, Liu J. Advances on resource utilization of semi-dry desulfurization ash by thermal decomposition: a high-efficiency and low-temperature method for large-scale processing. Environ Sci Pollut Res Int 2023; 30:91617-91635. [PMID: 37516705 DOI: 10.1007/s11356-023-28818-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 07/06/2023] [Indexed: 07/31/2023]
Abstract
The semi-dry flue gas desulfurization ash (SFGDA) is an industrial waste generated by the semi-dry desulfurization process, and its resources have been continuously attracted attention. Through the method of heat decomposition, the SFGDA decomposed into CaO and SO2 has emerged as a prominent research topic. This paper summarizes various of research workers, who revealed that the decomposition temperature of CaSO4 in SFGDA is greater than 1678 K and 1603 K in the air atmosphere and N2 atmosphere, respectively, presenting challenges such as high energy consumption and limited economic feasibility. On the one hand, the effects of CO and C regulating the pyrolysis atmosphere on reducing the pyrolysis temperature were reviewed. On the other hand, the impact of additives such as Fe2O3 and FeS2 was considered. Ultimately, the joint effects of regulating atmosphere and additives were discussed, and an efficient and low-temperature decomposition route was obtained; adding solid C source and Fe2O3 for pyrolysis reaction, the decomposition temperature of CaSO4 can be reduced by at least 230 K and desulfurization efficiency exceeds 95% under the condition of micro-oxidizing atmosphere. Moreover, the CaO resulting from SFGDA decomposition can be further synthesized into calcium ferrite, while the enriched SO2 can be utilized for the production of industrial sulfuric acid, which holds promising prospects for large-scale industrial applications.
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Affiliation(s)
- Lincheng Liu
- School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, People's Republic of China
| | - Xiaohui Fan
- School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, People's Republic of China
| | - Min Gan
- School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, People's Republic of China.
| | - Zengqing Sun
- School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, People's Republic of China
| | - Zhiyun Ji
- School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, People's Republic of China
| | - Jiaoyang Wei
- School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, People's Republic of China
| | - Jiayi Liu
- School of Earth and Space Sciences, Peking University, Beijing, People's Republic of China
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13
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Su JN, Gan M, Chen GY, Yin JL, Chen CLP. Global Learnable Attention for Single Image Super-Resolution. IEEE Trans Pattern Anal Mach Intell 2023; 45:8453-8465. [PMID: 37015427 DOI: 10.1109/tpami.2022.3229689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Self-similarity is valuable to the exploration of non-local textures in single image super-resolution (SISR). Researchers usually assume that the importance of non-local textures is positively related to their similarity scores. In this paper, we surprisingly found that when repairing severely damaged query textures, some non-local textures with low-similarity which are closer to the target can provide more accurate and richer details than the high-similarity ones. In these cases, low-similarity does not mean inferior but is usually caused by different scales or orientations. Utilizing this finding, we proposed a Global Learnable Attention (GLA) to adaptively modify similarity scores of non-local textures during training instead of only using a fixed similarity scoring function such as the dot product. The proposed GLA can explore non-local textures with low-similarity but more accurate details to repair severely damaged textures. Furthermore, we propose to adopt Super-Bit Locality-Sensitive Hashing (SB-LSH) as a preprocessing method for our GLA. With the SB-LSH, the computational complexity of our GLA is reduced from quadratic to asymptotic linear with respect to the image size. In addition, the proposed GLA can be integrated into existing deep SISR models as an efficient general building block. Based on the GLA, we constructed a Deep Learnable Similarity Network (DLSN), which achieves state-of-the-art performance for SISR tasks of different degradation types (e.g., blur and noise). Our code and a pre-trained DLSN have been uploaded to GitHub† for validation.
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14
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Zhu X, Chen Y, Xu C, Cook PLM, Odum B, Gan M, Zhang C. The influence of turbulence on sediment phosphorus sorption. Ecotoxicol Environ Saf 2023; 258:114955. [PMID: 37121076 DOI: 10.1016/j.ecoenv.2023.114955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/14/2023] [Accepted: 04/23/2023] [Indexed: 05/22/2023]
Abstract
The effect of mean flow velocity on phosphorus (P) partitioning between water and sediment has received much attention in recent decades. However, the impact of turbulence on the efficiency and capability of sediment adsorbing and desorbing dissolved inorganic phosphorus (DIP) is still unclear. A series of contrasting experiments on the sediment sorption and desorption of DIP with the flow turbulence kinetic energy (TKE) ranging from 1.95 to 2.93 pa have been conducted. It was found that the adsorbed P onto unit mass of sediment increases with the increase in TKE. It is because an increase in TKE results in a rise in the effective adsorption capacity of sediment (bm) by 20-30% during the adsorption process. The bm shows the maximum rise from 0.18 to 0.25 mg/g when TKE increases from 1.95 to 2.93 pa with a fixed sediment concentration of 0.5 g/L. To account for the direct effect of TKE on P adsorption, the Langmuir model is modified by introducing a newly defined coefficient (fA-TKE). The fA-TKE shows a good linear relationship with TKE. Comparison between the modified model and the classic model shows that the amount of adsorbed P could be overestimated by over 50% if the direct effect of turbulence intensity is ignored. The experimental data show that the increase in TKE also enhances the desorption process, with the degree of P desorption (Ddes) increased by 44%. The relation between Ddes and TKE can be well represented using a logarithmic function to quantify the direct effect of turbulence intensity on desorption of P.
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Affiliation(s)
- Xian Zhu
- State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China; College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, PR China
| | - Yongping Chen
- State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China; College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, PR China.
| | - Chunyang Xu
- State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China; College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, PR China
| | - Perran L M Cook
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Bismark Odum
- State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China; College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, PR China
| | - Min Gan
- Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Changkuan Zhang
- State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China; College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, PR China
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15
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Zhang K, Huang D, Zhang Y, El Houda Bouroubi N, Chen P, Ganbold N, He P, Liu J, Fang Y, Gan M, Zhu J, Yang B. Natural mineral-derived Fe/Mn-BC as efficient peroxydisulfate activator for 2,4-dichlorophenol removal from wastewater: Performance and sustainable catalytic mechanism. J Environ Manage 2023; 335:117540. [PMID: 36841004 DOI: 10.1016/j.jenvman.2023.117540] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/13/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
Iron and manganese oxides/biochar composite materials (Fe/Mn-BC) are promising catalysts in the field of advanced oxidation. High purity chemical reagents are popular precursors for preparing Fe/Mn-BC, while the potential of low-cost natural minerals as precursors has been neglected. In this study, high-efficiency Fe/Mn-BC was synthesized by one-step pyrolysis method using hematite, phosphoromanganese, and bagasse. The synthesized Fe/Mn-BC removed 83.7% 2, 4-dichlorophenol (2, 4-DCP) within 30 min, about 8.8 and 10.6 times better than biochar (BC) and Fe/Mn complex, respectively. The removal of 2, 4-DCP in the Fe/Mn-BC + peroxydisulfate (PDS) system was influenced by catalyst dosage, PDS concentration, initial pH, organic acids, and chromium. Sulfate radical (SO4•-) and hydroxyl radicals (•OH) generated by Fe/Mn-BC-activated PDS have similar contribution to the degradation of 2,4-DCP. A possible removal mechanism of 2, 4-DCP in the Fe/Mn-BC + PDS system was proposed based on Electron Spin Resonance spectroscopy, free radical quenching experiments, X-ray photoelectron spectroscopy, X-ray diffraction, and electrochemical measurement. Fe0 and Fe(II) in Fe/Mn-BC play significant role in catalytic degradation of 2, 4-DCP at the early stage of the reaction (within 0-5 min). Then, the interaction between Mn and BC or structural Mn and structural Fe gradually became dominant in the later stage. Similarly, the electron transfer promoted by biochar also played an important role in this catalysis. This discovery provided a new strategy for developing iron and manganese oxides/biochar composite materials to activate PDS for the elimination of refractory organic pollutants.
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Affiliation(s)
- Ke Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Dongli Huang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Ying Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Nour El Houda Bouroubi
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Pan Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Naranchimeg Ganbold
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Peng He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Junwu Liu
- Hunan Engineering Technology Research Center for Treatment and Recycling of Heavy Pollution Industrial Wastewater, China
| | - Yingchun Fang
- Hunan Engineering Technology Research Center for Treatment and Recycling of Heavy Pollution Industrial Wastewater, China
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Baojun Yang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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16
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Zhou S, Hu Y, Yang M, Liu Y, Li Q, Wang Y, Gu G, Gan M. Insights into the mechanism of persulfate activation with carbonated waste metal adsorbed resin for the degradation of 2,4-dichlorophenol. Environ Res 2023; 226:115639. [PMID: 36907348 DOI: 10.1016/j.envres.2023.115639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 02/28/2023] [Accepted: 03/04/2023] [Indexed: 06/18/2023]
Abstract
Superabsorbent resin (SAR) saturated with heavy metals poses a threat to surrounding ecosystem. To promote the reutilization of waste, resins adsorbed by Fe2+ and Cu2+ were carbonized and used as catalysts (Fe@C/Cu@C) to activate persulfate (PS) for 2,4-dichlorophenol (2,4-DCP) degradation. The heterogeneous catalytic reaction was mainly responsible for 2,4-DCP removal. The synergistic effect of Fe@C and Cu@C was propitious to 2,4-DCP degradation. Fe@C/Cu@C with a ratio of 2:1 showed the highest performance of 2,4-DCP removal. 40 mg/L 2,4-DCP was completely removed within 90 min under reaction conditions of 5 mM PS, pH = 7.0 and T = 25 °C. The cooperation of Fe@C and Cu@C facilitated the redox cycling of Fe and Cu species to supply accessible PS activation sites, enhancing ROS generation for 2,4-DCP degradation. Carbon skeleton enhanced 2,4-DCP removal via radical/nonradical oxidation pathways and via its adsorption to 2,4-DCP. SO4˙-, HO˙ and O2•- were the dominate radical species involved in 2,4-DCP destruction. Meanwhile, the possible pathways of 2,4-DCP degradation were proposed based on GC-MS. Finally, recycling tests proved catalysts exhibited recyclable stability. Aiming to resource utilization, Fe@C/Cu@C with satisfactory catalysis and stability, is promising catalyst for contaminated water treatment.
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Affiliation(s)
- Shuang Zhou
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Yonglian Hu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Minglei Yang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Yun Liu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Qingke Li
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Yanhong Wang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Guohua Gu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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17
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Sun Z, Li X, Liu Q, Tang Q, Lin X, Fan X, Huang X, Gan M, Chen X, Ji Z. Recent Advances in Alkali-Activated Materials with Seawater and Sea Sand. Materials (Basel) 2023; 16:ma16093571. [PMID: 37176453 PMCID: PMC10179923 DOI: 10.3390/ma16093571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/26/2023] [Accepted: 04/30/2023] [Indexed: 05/15/2023]
Abstract
The development of sustainable cementitious materials is essential and urgent for the construction industry. Benefiting from excellent engineering properties and a reduced greenhouse gas footprint, alkali-activated materials (AAM) are among the robust alternatives to Portland cement for civil infrastructure. Meanwhile, concrete production also accounts for around 20% of all industrial water consumption, and the global freshwater shortage is increasing. This review discusses recent investigations on seawater-mixed AAMs, including the effects of seawater on workability, reaction mechanism, shrinkage, short and long-term strength, binding of chloride and corrosion of steel reinforcement. Attention is also paid to the utilization of sea sand as aggregate, as well as discussions on the challenges and further research perspectives on the field application of AAMs with seawater and sea sand.
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Affiliation(s)
- Zengqing Sun
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Xiaoyu Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Qingsong Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Qingyu Tang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Xiaochen Lin
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Nanjing 210042, China
| | - Xiaohui Fan
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Xiaoxian Huang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Min Gan
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Xuling Chen
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Zhiyun Ji
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
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18
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Liu Q, Xue X, Sun Z, Huang X, Gan M, Ji Z, Chen X, Fan X. Efficient Co-Valorization of Phosphogypsum and Red Mud for Synthesis of Alkali-Activated Materials. Materials (Basel) 2023; 16:ma16093541. [PMID: 37176423 PMCID: PMC10179763 DOI: 10.3390/ma16093541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/12/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023]
Abstract
Phosphogypsum and red mud are bulk industrial solid wastes that trigger local environmental problems. In the present investigation, an efficient valorization process was developed through which phosphogypsum and red mud can be transformed into a precursor for the synthesis of high-strength, alkali-activated materials with a seawater-bearing sodium silicate solution as the alkaline activator. The effects of the activator modulus and liquid-to-solid ratio on the strength evolution of the synthesized AAMs as well as the microstructure and chemistry of the reaction products were investigated. The results showed that mineral reconstruction between PG and RM took place during calcination at 950 °C, forming ye'elimite, anhydrite and gehlenite, which then took part in the alkali-activation process and generated thenardite and C-A-S-H gel. The mechanical properties of the synthesized AAMs, ranging from 12.9 MPa to 40.6 MPa, were determined with the activator modulus and liquid-to-solid ratio. Results from the present investigation contributed to the facile and efficient valorization of phosphogypsum and red mud into cementitious construction materials.
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Affiliation(s)
- Qingsong Liu
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
| | - Xiangci Xue
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
| | - Zengqing Sun
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
| | - Xiaoxian Huang
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
| | - Min Gan
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
| | - Zhiyun Ji
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
| | - Xuling Chen
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
| | - Xiaohui Fan
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
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19
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Yang Q, Jie S, Lei P, Gan M, He P, Zhu J, Zhou Q. Effect of Anthropogenic Disturbances on the Microbial Relationship during Bioremediation of Heavy Metal-Contaminated Sediment. Microorganisms 2023; 11:1185. [PMID: 37317159 DOI: 10.3390/microorganisms11051185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 04/25/2023] [Accepted: 04/28/2023] [Indexed: 06/16/2023] Open
Abstract
Soil, sediment, and waters contaminated with heavy metals pose a serious threat to ecosystem function and human health, and microorganisms are an effective way to address this problem. In this work, sediments containing heavy metals (Cu, Pb, Zn, Mn, Cd, As) were treated differently (sterilized and unsterilized) and bio-enhanced leaching experiments were carried out with the addition of exogenous iron-oxidizing bacteria A. ferrooxidans and sulfur-oxidizing bacteria A. thiooxidans. The leaching of As, Cd, Cu, and Zn was higher in the unsterilized sediment at the beginning 10 days, while heavy metals leached more optimally in the later sterilized sediment. The leaching of Cd from sterilized sediments was favored by A. ferrooxidans compared to A. thiooxidans. Meanwhile, the microbial community structure was analyzed using 16S rRNA gene sequencing, which revealed that 53.4% of the bacteria were Proteobacteria, 26.22% were Bacteroidetes, 5.04% were Firmicutes, 4.67% were Chlamydomonas, and 4.08% were Acidobacteria. DCA analysis indicated that microorganisms abundance (diversity and Chao values) increased with time. Furthermore, network analysis showed that complex networks of interactions existed in the sediments. After adapting to the acidic environmental conditions, the growth of some locally dominant bacteria increased the microbial interactions, allowing more bacteria to participate in the network, making their connections stronger. This evidence points to a disruption in the microbial community structure and its diversity following artificial disturbance, which then develops again over time. These results could contribute to the understanding of the evolution of microbial communities in the ecosystem during the remediation of anthropogenically disturbed heavy metals.
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Affiliation(s)
- Quanliu Yang
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Shiqi Jie
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Pan Lei
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Peng He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Qingming Zhou
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
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20
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Xing J, Tang Q, Gan M, Ji Z, Fan X, Sun Z, Chen X. Co-treatment of municipal solid waste incineration fly ash (MSWI FA) and municipal sludge: A innovative method to improve sludge dewatering with fly ash dechlorination. J Environ Manage 2023; 332:117403. [PMID: 36738722 DOI: 10.1016/j.jenvman.2023.117403] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/16/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
The complexity of municipal sludge dewatering is a bottleneck problem limiting resource utilization. In this paper, adding municipal solid waste incineration fly ash (MSWI FA) to municipal sludge for enhanced dewatering was applied, while the chlorine salt in MSWI FA was simultaneously removed using water in municipal sludge. The effects of different dosages and chemical components of MSWI FA on municipal sludge dewatering, and the removal effect of municipal sludge washing on Cl element were investigated. The results showed that the municipal sludge's specific resistance to filtration after co-treatment was significantly reduced, and more hydrophobic channels were formed in the vacuum suction filtration of the treated municipal sludge, conducive to efficient water removal. The moisture content of municipal sludge was reduced from 96.0% to 48.3%, and the moisture reduction rate increased from 17.7% to 32.1%. The chemical composition of MSWI FA could effectively promote the dewatering of municipal sludge, among which CaO was the best, followed by CaCl2 and NaCl, and KCl was the worst. Simultaneously, the municipal sludge showed a good effect on removing Cl from MSWI FA. The minimum Cl content in the mixture after Co-treatment is 1.5%. These results could provide a new way to dispose of MSWI FA and municipal sludge.
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Affiliation(s)
- Jinxin Xing
- School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, PR China
| | - Qingyu Tang
- School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, PR China
| | - Min Gan
- School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, PR China.
| | - Zhiyun Ji
- School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, PR China
| | - Xiaohui Fan
- School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, PR China
| | - Zengqing Sun
- School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, PR China
| | - Xuling Chen
- School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, PR China
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Fan X, Yuan R, Gan M, Ji Z, Sun Z. Subcritical hydrothermal treatment of municipal solid waste incineration fly ash: A review. Sci Total Environ 2023; 865:160745. [PMID: 36586675 DOI: 10.1016/j.scitotenv.2022.160745] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 11/10/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Municipal solid waste incineration fly ash (MSWI-FA) is a hazardous waste generated from the incineration process, and the harmless treatment of MSWI-FA has attracted widespread attention. Subcritical hydrothermal treatment is competitive in achieving the harmless treatment and resource recycling of MSWI-FA. It exhibits excellent performance in degrading dioxins, stabilizing heavy metals, and converting MSWI-FA into zeolite or tobermorite at low temperatures. This paper clearly introduces the characteristics of MSWI-FA, roundly summarizes the current research status of treating MSWI-FA by subcritical hydrothermal methods, and deeply clarifies the mechanisms of dioxins degradation, zeolite/tobermorite synthesis, and heavy metals stabilization. Considering the research status of handling MSWI-FA by subcritical hydrothermal methods, future research directions are proposed. Owing to the advantages of high efficiency, energy-saving, and environmental sustainability, subcritical hydrothermal treatment of MSWI-FA exhibits promising prospects for industrialization.
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Affiliation(s)
- Xiaohui Fan
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, PR China
| | - Ruirui Yuan
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, PR China.
| | - Min Gan
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, PR China.
| | - Zhiyun Ji
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, PR China
| | - Zengqing Sun
- School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, PR China
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22
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Xing C, Da H, Yang P, Huang J, Gan M, Zhou J, Li Y, Zhang H, Ge B, Fei L. Aluminum Impurity from Current Collectors Reactivates Degraded NCM Cathode Materials toward Superior Electrochemical Performance. ACS Nano 2023; 17:3194-3203. [PMID: 36724114 DOI: 10.1021/acsnano.3c00270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The huge amount of degraded NCM (LiNi0.5Co0.2Mn0.3O2) cathode materials from spent lithium-ion batteries is arising as a serious environmental issue as well as a severe waste of metal resources, and therefore, direct recycling of them toward usable electrode materials again is environmentally and economically more attractive in contrast to present metallurgical treatments. In this work, we design a robust two-step method for direct recycling of degraded NCM materials, which uses the aluminum impurity from the attached current collector to supplement the transition metal vacancies for simultaneous elemental compensation and structural restoration. This single-element compensation strategy leads to the regeneration of high-quality NCM material with depressed cation disordering and stabilized layered structure. Moreover, the regenerated NCM material with controllable Al doping delivered an outstanding electrochemical performance; specifically, the capacity (158.6 mAh g-1), rate capability (91.6 mAh g-1 at 5 C), and cycling stability (89.6% capacity retention after 200 cycles) of the regenerated NCM material are even comparable with those of fresh materials. The as-established regeneration protocol has its chance in simplifying the industrial recycling process of degraded NCM materials.
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Affiliation(s)
- Chunxian Xing
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Haoran Da
- Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Peng Yang
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Jiawei Huang
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Min Gan
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Jian Zhou
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Yong Li
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
| | - Haitao Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Binghui Ge
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
| | - Linfeng Fei
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China
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Zhou S, Gan M, Wang X, Zhang Y, Fang Y, Gu G, Wang Y, Qiu G. ROS formation driven by pyrite-mediated arsenopyrite oxidation and its potential role on arsenic transformation. J Hazard Mater 2023; 443:130151. [PMID: 36270187 DOI: 10.1016/j.jhazmat.2022.130151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/13/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Pyrite-mediated arsenopyrite oxidation is an important process affecting arsenic (As) mobility. The iron sulfides-induced reactive oxidation species (ROS) can exert significant influence on As transformation. However, the impact of pyrite-arsenopyrite association on ROS production and its contribution to As transformation were rarely estimated. Here, ROS formation and the redox conversion of As during the interaction between pyrite and arsenopyrite as function of O2, pH and pyrite surface oxidation were investigated. Pyrite promoted arsenopyrite oxidation and As(III) oxidation due to heterogeneous electron transfer. The electron transfer from arsenopyrite facilitated O2 reduction on pyrite surface with increasing ROS formation. Hydroxyl radical (HO˙), superoxide (O2•)- and hydrogen peroxide (H2O2) were the main reactive species for As(III) oxidation. Iron (hydr)oxides produced from pyrite surface oxidation provided fast electron transfer channels for efficient O2 reduction as evidenced by electrochemical experiment, further verifying the promoted effect of surface-oxidized pyrite (SOP) on arsenopyrite dissolution. However, total As and As(V) obviously decreased during SOP-mediated arsenopyrite oxidation. Iron (hydr)oxides retained appreciable As through adsorption to limit its mobility, and decreased HO˙ production to inhibit As(III) oxidation via decomposing H2O2. This work furthers our understanding of arsenic transformation in the environment which has important implications for mitigating arsenic pollution.
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Affiliation(s)
- Shuang Zhou
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China; Hunan Engineering Technology Research Center for Treatment and Recycling of Heavy Pollution Industrial Wastewater, Changsha 410083, China
| | - Xingxing Wang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yisheng Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yingchun Fang
- Hunan Engineering Technology Research Center for Treatment and Recycling of Heavy Pollution Industrial Wastewater, Changsha 410083, China
| | - Guohua Gu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
| | - Yanhong Wang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
| | - Guanzhou Qiu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
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Gu C, Cai M, He P, Zhu J, Gan M. Biogenic carbon encapsulated iron oxides mediated oxalic acid for Cr(VI) reduction in aqueous: Efficient performance, electron transfer and radical mechanisms. Chemosphere 2023; 313:137557. [PMID: 36535500 DOI: 10.1016/j.chemosphere.2022.137557] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/07/2022] [Accepted: 12/11/2022] [Indexed: 06/17/2023]
Abstract
Carbonaceous materials have a potential to mediated oxalic acid (OA) for Cr(VI) reduction, but the rational modification is needed for boosting the mediation of electron transfer. Herein, we utilized polyvinyl alcohol to envelop schwertmannite synthesized by Acidithiobacillus ferrooxidans biomineralization, and pyrolyzed them to obtain the carbon encapsulated iron oxides (C-2.0-Sch-PVA). SEM and TEM results demonstrated that a moderate calcination temperature would yield a neural network-like carbon encapsulated structure. C-2.0-Sch-PVA efficiently mediated OA to reduce Cr(VI), 98.4% of Cr(VI) (40 mg L-1) was reduced with 0.75 g L-1 C-2.0-Sch-PVA and 4 mM OA in 60 min. It still performed excellent results in a wide pH range, multiple anions and different water matrixes. The carbon encapsulated structure as electron shuttle mediated the electron transfer, and the O-moieties on its surface were a premise for initiating the Cr(VI) reduction process. The electron transfer from the inner iron oxides to the conjugated structure of the outer carbon shells facilitated Cr(VI) reduction as well. Moreover, OA raised the persistent free radicals' level in C-2.0-Sch-PVA as another important pathway for Cr(VI) reduction. Overall, C-2.0-Sch-PVA provides an excellent demonstration in the carbonaceous materials modification for mediating OA to reduce Cr(VI) in aqueous.
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Affiliation(s)
- Chunyao Gu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Miao Cai
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Peng He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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25
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Zhang K, Yang Q, Jin Y, He P, Li Q, Chen P, Zhu J, Gan M. Catalytic activation of peroxydisulfate by secondary mineral derived self-modified iron-based composite for florfenicol degradation: Performance and mechanism. Chemosphere 2023; 313:137616. [PMID: 36563721 DOI: 10.1016/j.chemosphere.2022.137616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/09/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
The advanced oxidation processes (AOPs) driven by iron-based materials are the highly efficient technology for refractory organic pollutants treatment. In this work, self-modified iron-based catalysts were prepared using secondary mineral as the precursor by one-step pyrolysis process without additional dopants. The prepared catalysts exhibited excellent performance in catalytic degradation of florfenicol (FF), especially C-AJ, which was derived from ammoniojarosite [(NH4, H3O)Fe3(OH)6(SO4)2], activated PDS to degrade 93% FF with initial concentration of 50 mg/L. Quenching tests and electron paramagnetic resonance (ESR) studies showed that SO4•-, •OH, and •O2- were the main reactive species for FF degradation and their contribution degree was SO4•- > •OH > •O2-. The Fe0 and the cycle of Fe(II)/Fe(III) both contributed to the PDS activation, and the reduction of Fe(III) to Fe(II) was accelerated by S2- on the catalyst surface. In addition, Fe3O4 on the C-AJ indirectly catalyzes PDS by promoting electron transfer. The effects of catalyst dosage, PDS concentration, pH, inorganic anions, and real aqueous matrices on FF degradation, TOC analysis, and cycling test were investigated. The results showed that iron-based catalysts have superior environmental durability due to their excellent catalytic properties in the real aqueous matrices with common inorganic anions and pH 3-9 and its steady catalytic capacity with multiple cycles. Overall, this study sheds new light on the rational design of self-modified iron-based composite and develops low-cost technology toward remediation of FF-contaminated wastewater.
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Affiliation(s)
- Ke Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Quanliu Yang
- Guizhou Academy of Tobacco Sciences, Guiyang, 550011, China
| | - Yuwen Jin
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Peng He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Qiongyao Li
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Pan Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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Gan M, Xing J, Tang Q, Ji Z, Fan X, Zheng H, Sun Z, Chen X. Basic Research on Co-treatment of Municipal Solid Waste Incineration Fly Ash and Municipal Sludge for Energy-Saving Melting. ACS Omega 2022; 7:45153-45164. [PMID: 36530302 PMCID: PMC9753491 DOI: 10.1021/acsomega.2c05598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
MSWI fly ash and municipal sludge are solid wastes. Melting vitrification treatment was a resource utilization method. However, the flow temperature of grate furnace MSWI fly ash and municipal sludge was high (>1325 °C), which increased the energy consumption in the melting process. MSWI fly ash contained a large amount of CaO, and municipal sludge contained a large amount of SiO2, Al2O3, and Fe2O3. The temperature of melting vitrification can be reduced using these two kinds of CITY garbage as raw materials to change the proportion of ingredients. The eutectic characteristics of MSWI fly ash and municipal sludge and the phase diagrams of CaO-SiO2-Al2O3 (C-S-A) and CaO-SiO2-Al2O3-Fe2O3 (C-S-A-F) were analyzed in this paper. It established a low melting point mixing system. The results showed that when the amount of municipal sludge was 50-70%, the flow temperature of the mixtures was <1215 °C, which was significantly lower than that of MSWI fly ash (1490 °C) and municipal sludge (1325 °C). The optimal range of low melting point components was 14.1-36.3% CaO, 21.6-40.4% SiO2, 6.7-12.6% Al2O3, and 6.3-11.4% Fe2O3. At 400-1400 °C, the minerals in the mixtures mainly changed as follows: CaCO3 + SiO2 + Al2O3 → Ca2SiO4 + Ca3SiO5 + Ca2Al2SiO7 + Ca3Al2O6 + Ca12Al14O33 → CaAl2Si2O8. In the melting experiment, with the increase in temperature, most of the phases in the mixtures might become amorphous. Therefore, the low melting point phase anorthite (CaAl2Si2O8) only accounted for a small part of the final molten product.
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Tang Q, Xing J, Sun Z, Gan M, Fan X, Ji Z, Huang X, Yang R. Enhancing the Dewaterability of Oily Cold Rolling Mill Sludge Using Quicklime as a Conditioning Agent. ACS Omega 2022; 7:44278-44286. [PMID: 36506138 PMCID: PMC9730775 DOI: 10.1021/acsomega.2c05771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 10/21/2022] [Indexed: 06/17/2023]
Abstract
The high moisture and viscosity characteristics of oily cold rolling mill (CRM) sludge led to limitations in its recycling. In this paper, the results of using quicklime as a conditioning agent to improve the dewaterability of the oily CRM sludge cake were reported. Quicklime was selected as the best conditioning agent through conditioning-dewatering experiments because it could effectively reduce the viscosity of oily CRM sludge and improve the dewaterability of the oil sludge filter cake. The optimal conditioning effect was obtained when the quicklime dosage was 10%, the temperature was 60 °C, the liquid/solid ratio was 1.5:1, and the time was 30 min. The reduction of specific resistance to filtration was 95.9%, and the coefficient of compressibility of the filter cake decreased from 1.11 to 0.89. The dewatering rate increased from 9.0 to 52.6%. The oily CRM sludge cake formed an incompressible rigid porous structure because of conditioning with quicklime. In addition, after conditioning with quicklime, the oil content, chemical oxygen demand, and turbidity of the filtrate decreased, and the composition of the dried filter cake met the requirements of ironmaking raw materials. Using quicklime to condition the oily CRM sludge provided a green approach to waste recovery and sustainable management.
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Zhang K, Zhu Z, Peng M, Tian L, Chen Y, Zhu J, Gan M. Enhancement of Cr(VI) reduction by indigenous bacterial consortia using natural pyrite: A detailed study to elucidate the mechanisms involved in the highly efficient and possible sustainable system. Chemosphere 2022; 308:136228. [PMID: 36041522 DOI: 10.1016/j.chemosphere.2022.136228] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 07/28/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Pyrite was applied to Cr(VI) bioremediation as an inorganic electron donor due to the ability to provide electrons, while the role of pyrite in Cr(VI) bioremediation where organics as electron donors remains unknown. Herein a pyrite-based Cr(VI) bioreduction process in the sediment system containing lactate was demonstrated to be effective to detoxify Cr(VI): over 2200 mg L-1 Cr(VI) was continuously removed within 210 h with high reactivity (10.5 mg/(L·h)) all along. High-throughput 16S rDNA gene sequencing indicated that the pyrite could shape a functioning community that electrochemically active bacteria dominated (such as Fusibacter sp. and Rhodobacteraceae) instead of iron-oxidizing bacteria and sulfur-oxidizing bacteria. Mineralogy analysis results indicated that Fe(III), S22- and S0 formed on the pyrite surface after the oxidation of Cr(VI) might serve as the electron acceptor of microflora, then the S2- and Fe(II) with strong Cr(VI) reduction ability were formed by microbial reduction to enhance the removal of Cr(VI). This study provides new insights into thoroughly understanding the role of pyrite in the practical application of Cr(VI) bioreduction.
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Affiliation(s)
- Ke Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Zhenyu Zhu
- Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin, 644000, China
| | - Mingxian Peng
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Luyan Tian
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Yaozong Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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Zhang K, Zhu Z, Luo S, Xu Z, Lei P, Gan M, Chen P, Zhu J. One-step synthesis of a novel natural mineral-derived Fe@BC for enhancing Cr(VI) bioreduction: Synergistic role of electron transfer and microbial metabolism. Chemosphere 2022; 308:136439. [PMID: 36115474 DOI: 10.1016/j.chemosphere.2022.136439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/16/2022] [Accepted: 09/10/2022] [Indexed: 06/15/2023]
Abstract
Iron minerals, which exert excellent biocompatibility and reactivity with redox-active microorganisms, have attracted attention as a precursor to synthesizing composite materials with higher catalytic efficiency in driving redox-active microorganisms to reduce Cr(VI). However, researches on the effective preparation method of composites, the interaction between bacteria and composite materials and the mechanism of electron transfer are still scarce. In this work, Fe-complex@BC prepared by a one-step method using goethite was used for chromium treatment together with soil microorganisms. The composite was the best-performing in promoting Cr(VI) bioreduction (up to 3.48 mg (L·h)-1) than Fe-complex (2.26 mg (L·h)-1) and biochar (0.5 mg (L·h)-1), even about 19 times higher than that of bioreduction without materials. Specifically, Fe-complex@BC shortened the electron transfer distance due to its excellent adsorption properties for bacteria and Cr(VI). Its high redox activity also promoted Cr(VI) bioreduction by directly enhancing electron transfer. In addition, the presence of the Fe(III)/Fe(II) cycle proved that the active sites of composite could be regenerated to reduce Cr(VI) persistently by receiving extracellular electrons from bacteria. High-throughput 16 S rDNA gene sequencing indicated the composite could promote the proliferation of electrochemically active bacteria, which directly enhanced bioreduction. This study developed the low-cost Fe@BC material prepared by a one-step co-pyrolysis method, which exerts a synergistic effect with soil microorganisms and presents a promising potential for chromium pollution treatment.
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Affiliation(s)
- Ke Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Zhenyu Zhu
- Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin, 644000, China
| | - Sheng Luo
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Zichao Xu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Pan Lei
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Pan Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
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30
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Zeng LL, Fan Z, Su J, Gan M, Peng L, Shen H, Hu D. Gradient Matching Federated Domain Adaptation for Brain Image Classification. IEEE Trans Neural Netw Learn Syst 2022; PP:1-15. [PMID: 36441881 DOI: 10.1109/tnnls.2022.3223144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Federated learning has shown its unique advantages in many different tasks, including brain image analysis. It provides a new way to train deep learning models while protecting the privacy of medical image data from multiple sites. However, previous studies suggest that domain shift across different sites may influence the performance of federated models. As a solution, we propose a gradient matching federated domain adaptation (GM-FedDA) method for brain image classification, aiming to reduce domain discrepancy with the assistance of a public image dataset and train robust local federated models for target sites. It mainly includes two stages: 1) pretraining stage; we propose a one-common-source adversarial domain adaptation (OCS-ADA) strategy, i.e., adopting ADA with gradient matching loss to pretrain encoders for reducing domain shift at each target site (private data) with the assistance of a common source domain (public data) and 2) fine-tuning stage; we develop a gradient matching federated (GM-Fed) fine-tuning method for updating local federated models pretrained with the OCS-ADA strategy, i.e., pushing the optimization direction of a local federated model toward its specific local minimum by minimizing gradient matching loss between sites. Using fully connected networks as local models, we validate our method with the diagnostic classification tasks of schizophrenia and major depressive disorder based on multisite resting-state functional MRI (fMRI), respectively. Results show that the proposed GM-FedDA method outperforms other commonly used methods, suggesting the potential of our method in brain imaging analysis and other fields, which need to utilize multisite data while preserving data privacy.
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31
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Gan M, Hu J, Wan K, Liu X, Chen P, Zeng R, Wang F, Zhao Y. Isolation and Characterization of Lactobacillus paracasei 85 and Lactobacillus buchneri 93 to Absorb and Biotransform Zearalenone. Toxics 2022; 10:680. [PMID: 36355971 PMCID: PMC9695132 DOI: 10.3390/toxics10110680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/04/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
As one of the most prevalent estrogenic mycotoxins in cereals and animal feed, zearalenone (ZEN) can cause serious reproductive disorders. ZEN control in food and feed commodities has been an imperative area of research. In this study, 87 lactic acid bacteria (LAB) were isolated from pickles and their ZEN (5 mg/L) removal abilities ranged from 0% to 68.4%. Then, five strains with potent ZEN removal ability (>50%) were identified: Lactobacillus plantarum 22, L. plantarum 37, L. plantarum 47, L. paracasei 85, and L. buchneri 93. Under optimization conditions (48 h, pH 4.0, 37 °C, and 5 mg/L), the highest ZEN removal abilities of L. paracasei 85 and L. buchneri 93 reached 77.7% and 72.8%, respectively. Moreover, the two lactic acid bacteria decreased the toxicity of ZEN, because the levels of β-zearalenol (β-ZOL) transformed from ZEN were more than two-fold higher than α-zearalenol (α-ZOL). Additionally, cell free supernatant and pellet biotransformation of ZEN to α-ZOL and β-ZOL in LAB were detected for the first time. Furthermore, chemical and enzymatical treatments combined with Fourier-transform infrared spectroscopy analysis indicated that exopolysaccharides, proteins, and lipids on the cell wall could bond to ZEN through hydrophobic interactions. Scanning electron microscopy indicated that cell structure damage occurred during the ZEN clearance to L. buchneri 93, but it did not with L. paracasei 85. In addition, various organic acids, alcohols, and esters of the two LAB participated in ZEN removal. Hence, L. paracasei 85 and L. buchneri 93 can be considered as potential detoxification agents for ZEN removal for food and feedstuff.
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Affiliation(s)
- Min Gan
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Jian Hu
- Tangshan Food and Drug Comprehensive Testing Center, Tangshan 063000, China
| | - Kai Wan
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Xiangxiang Liu
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Peirong Chen
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Rui Zeng
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Fuhua Wang
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
| | - Yarong Zhao
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
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Chen GY, Gan M, Chen L, Chen CLP. Online Identification of Nonlinear Systems With Separable Structure. IEEE Trans Neural Netw Learn Syst 2022; PP:1-7. [PMID: 36327182 DOI: 10.1109/tnnls.2022.3215756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Separable nonlinear models (SNLMs) are of great importance in system modeling, signal processing, and machine learning because of their flexible structure and excellent description of nonlinear behaviors. The online identification of such models is quite challenging, and previous related work usually ignores the special structure where the estimated parameters can be partitioned into a linear and a nonlinear part. In this brief, we propose an efficient first-order recursive algorithm for SNLMs by introducing the variable projection (VP) step. The proposed algorithm utilizes the recursive least-squares method to eliminate the linear parameters, resulting in a reduced function. Then, the stochastic gradient descent (SGD) algorithm is employed to update the parameters of the reduced function. By considering the tight coupling relationship between linear parameters and nonlinear parameters, the proposed first-order VP algorithm is more efficient and robust than the traditional SGD algorithm and alternating optimization algorithm. More importantly, since the proposed algorithm just uses the first-order information, it is easier to apply it to large-scale models. Numerical results on examples of different sizes confirm the effectiveness and efficiency of the proposed algorithm.
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Chen GY, Gan M, Chen CLP, Zhu HT, Chen L. Frequency Principle in Broad Learning System. IEEE Trans Neural Netw Learn Syst 2022; 33:6983-6989. [PMID: 34048351 DOI: 10.1109/tnnls.2021.3081568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Deep neural networks have achieved breakthrough improvement in various application fields. Nevertheless, they usually suffer from a time-consuming training process because of the complicated structures of neural networks with a huge number of parameters. As an alternative, a fast and efficient discriminative broad learning system (BLS) is proposed, which takes the advantages of flat structure and incremental learning. The BLS has achieved outstanding performance in classification and regression problems. However, the previous studies ignored the reason why the BLS can generalize well. In this article, we focus on the interpretation from the viewpoint of the frequency domain. We discover the existence of the frequency principle in BLS, i.e., the BLS preferentially captures low-frequency components quickly and then fits the high frequencies during the incremental process of adding feature nodes and enhancement nodes. The frequency principle may be of great inspiration for expanding the application of BLS.
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Chen J, Gan M, Zhu Q, Narayan P, Liu Y. Robust Standard Gradient Descent Algorithm for ARX Models Using Aitken Acceleration Technique. IEEE Trans Cybern 2022; 52:9646-9655. [PMID: 33755573 DOI: 10.1109/tcyb.2021.3063113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A robust standard gradient descent (SGD) algorithm for ARX models using the Aitken acceleration method is developed. Considering that the SGD algorithm has slow convergence rates and is sensitive to the step size, a robust and accelerative SGD (RA-SGD) algorithm is derived. This algorithm is based on the Aitken acceleration method, and its convergence rate is improved from linear convergence to at least quadratic convergence in general. Furthermore, the RA-SGD algorithm is always convergent with no limitation of the step size. Both the convergence analysis and the simulation examples demonstrate that the presented algorithm is effective.
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Wu Y, Fan X, Ji Z, Gan M, Zhou H, Li H, Chen X, Zhao Y, Zhang R, Lai R. Investigation on the application of by-product steam in iron ore sintering: performance and function mechanism. Environ Sci Pollut Res Int 2022; 29:62698-62709. [PMID: 35411520 DOI: 10.1007/s11356-022-20059-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
The combustion-supporting effect of steam to coke breeze in sintering has the potential to improve sinter quality and reduce pollutants emissions. The results show that increasing the by-product steam injection concentration (0.32-0.47vol%) and prolonging the injection time (5 min) within a proper range (10-15 min) can improve sinter quality. 2.13kgce/t-sinter of the fuel consumption was decreased by reducing coke breeze usage from 5.60 to 5.45% under the recommended parameters, with 15.16% decrease of CO in sintering waste gas. By comparing experimental data with thermodynamic calculations, although the reaction between CO and steam can reduce CO emission and generate H2, steam tends to react with coke breeze to generate H2 and CO (react at 674℃), and OH radical produced by H2 which can reduce the activation energy of CO oxidation reaction is the key to reducing pollutant emissions. The potential economic benefit of steam injection technology was calculated based on a 360m2 sintering machine (the annual sinter output is 3.2million tons), excluding the equipment modification and steam injection cost of $300,000; a profit of $737491.2 per year or 0.23 dollars per ton sinter can be achieved. Therefore, low-carbon and cleaner iron ore sintering production can be realized through applying by-product steam.
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Affiliation(s)
- Yufeng Wu
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
| | - Xiaohui Fan
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
| | - Zhiyun Ji
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China.
| | - Min Gan
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
| | - Haoyu Zhou
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
- MCC Changtian International Engineering Co., Ltd, No. 7 Jieqing Road, Meixi Lake, Yuelu District, Changsha, Hunan, People's Republic of China
| | - Haorui Li
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
| | - Xuling Chen
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
| | - Yuanjie Zhao
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
| | - Rongchang Zhang
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
| | - Ruisi Lai
- School of Resource Processing and Bioengineering, Central South University, 932 Lushan South Road, Yuelu District, Changsha City, Hunan Province, China
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Dai F, Huang X, Fan X, Chen X, Gan M, Ji Z, Sun Z, Zhao G. Mathematical modeling and distribution characteristics evaluation of fuel particles in iron ore sintering process. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Huang J, Zhang Z, Ying Y, Gan M, Huang H, Fei L. Atomic-scale mechanisms on the stepwise growth of Mo xW 1-xS 2 into hexagonal flakes. Chem Commun (Camb) 2022; 58:9746-9749. [PMID: 35858288 DOI: 10.1039/d2cc02465a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The systematic in situ transmission electron microscopy (TEM) analysis suggests three stepwise formation stages during the growth of MoxW1-xS2 hexagonal flakes, which are the initial assembly of precursors into vertical structures, subsequent transition into horizontal structures, and final surface relaxing and faceting into hexagonal flakes.
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Affiliation(s)
- Jiawei Huang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Zhouyang Zhang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Yiran Ying
- Department of Applied Physics and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Min Gan
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Haitao Huang
- Department of Applied Physics and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Linfeng Fei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China.
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Zhang Z, Tang Y, Ying Y, Guo J, Gan M, Jiang Y, Xing C, Pan S, Xu M, Zhou Y, Zhang H, Leung CW, Huang H, Mak CL, Fei L. Multistep nucleation visualized during solid-state crystallization. Mater Horiz 2022; 9:1670-1678. [PMID: 35470363 DOI: 10.1039/d2mh00174h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Mechanisms of nucleation have been debated for more than a century, despite successes of classical nucleation theory. The nucleation process has been recently argued as involving a nonclassical mechanism (the "two-step" mechanism) in which an intermediate step occurs before the formation of a nascent ordered phase. However, a thorough understanding of this mechanism, in terms of both microscopic kinetics and thermodynamics, remains experimentally challenging. Here, in situ observations using transmission electron microscopy on a solid-state nucleation case indicate that early-stage crystallization can follow the non-classical pathway, yet proceed via a more complex manner in which multiple metastable states precede the emergence of a stable nucleus. The intermediate steps were sequentially isolated as spinodal decomposition of amorphous precursor, mass transport and structural oscillations between crystalline and amorphous states. Our experimental and theoretical analyses support the idea that the energetic favorability is the driving force for the observed sequence of events. Due to the broad applicability of solid-state crystallization, the findings of this study offer new insights into modern nucleation theory and a potential avenue for materials design.
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Affiliation(s)
- Zhouyang Zhang
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials, Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Multiscale Interdisciplinary Study, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Yujie Tang
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Yiran Ying
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Junqing Guo
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials, Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Multiscale Interdisciplinary Study, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Min Gan
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials, Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Multiscale Interdisciplinary Study, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Yateng Jiang
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials, Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Multiscale Interdisciplinary Study, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Chunxian Xing
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials, Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Multiscale Interdisciplinary Study, Nanchang University, Nanchang, Jiangxi 330031, China.
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Shanshan Pan
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Ming Xu
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Yangbo Zhou
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials, Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Multiscale Interdisciplinary Study, Nanchang University, Nanchang, Jiangxi 330031, China.
| | - Haitao Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
| | - Chi Wah Leung
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Haitao Huang
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Chee Leung Mak
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Linfeng Fei
- School of Physics and Materials Science, Jiangxi Key Laboratory for Two-Dimensional Materials, Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Multiscale Interdisciplinary Study, Nanchang University, Nanchang, Jiangxi 330031, China.
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Gan M, Zhu HT, Chen GY, Chen CLP. Weighted Generalized Cross-Validation-Based Regularization for Broad Learning System. IEEE Trans Cybern 2022; 52:4064-4072. [PMID: 32903193 DOI: 10.1109/tcyb.2020.3015749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The broad learning system (BLS) is an emerging flat network, which has demonstrated its outstanding performance in classification and regression problems. The regularization plays an important role in the performance of the BLS. In real applications, since the BLS network is usually expanded dynamically, a predetermined regularization parameter may reduce the performance of the network. Using a fixed regularization in some cases, the classification accuracy of the BLS decreases dramatically when we expand the network. To alleviate this problem, we propose a method that automatically finds appropriate regularization parameters for different datasets, which is based on the weighted generalized cross-validation (WGCV). The experimental results indicate that the WGCV method improves the performance of the BLS, and alleviates the accuracy decrease of the incremental learning algorithm.
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Liang J, Quan Z, Zhu J, Gan M, Shen P. A functional promoter from the archaeon Halobacterium salinarum is also transcriptionally active in E. coli. BMC Microbiol 2022; 22:79. [PMID: 35331139 PMCID: PMC8943987 DOI: 10.1186/s12866-022-02489-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 02/25/2022] [Indexed: 11/18/2022] Open
Abstract
Background Archaea form a third domain of life that is distinct from Bacteria and Eukarya. So far, many scholars have elucidated considerable details about the typical promoter architectures of the three domains of life. However, a functional promoter from the archaeon Halobacterium salinarum has never been studied in Escherichia coli. Results This paper found that the promoter of Halobacterium salinarum showed a promoter function in Escherichia coli. This Escherichia coli promoter structure contains − 10 box, -10 box extension and − 29 elements, however, no -35 box. The − 29 element is exercised by the TATA box in archaea. And we isolated the RM10 fragment that possessed the fusion characteristics of bacteria and archaea, which was overlapped with functionality of TATA box and − 29 elements. Conclusions The − 29 element reflects the evolutionary relationship between the archaeal promoter and the bacterial promoter. The result possibly indicated that there may be a certain internal connection between archaea and bacteria. We hypothesized that it provided a new viewpoint of the evolutionary relationship of archaea and other organisms. Supplementary Information The online version contains supplementary material available at 10.1186/s12866-022-02489-y.
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Affiliation(s)
- Jinye Liang
- Key laboratory of Biometallurgy, Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, China
| | - Zhenghui Quan
- College of Life Sciences, Wuhan University, 430000, Wuhan, China
| | - Jianyu Zhu
- Key laboratory of Biometallurgy, Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, China. .,College of Life Sciences, Wuhan University, 430000, Wuhan, China.
| | - Min Gan
- Key laboratory of Biometallurgy, Ministry of Education, School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, China.
| | - Ping Shen
- College of Life Sciences, Wuhan University, 430000, Wuhan, China.
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Zhou S, Tong G, Meng X, Wang Y, Gu G, Gan M. Reactive oxygen species formation driven by acidophiles mediated pyrite oxidation and its potential role on 2,4-dichlorophenol transformation. J Hazard Mater 2022; 425:127833. [PMID: 34872039 DOI: 10.1016/j.jhazmat.2021.127833] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
Researches of reactive oxygen species (ROS) generation from pyrite oxidation and its impact on contaminants transformation has been constrained to abiotic conditions. However, pyrite oxidation by acidophiles is widespread in acidic environments. The potential role of these microorganisms on pyrite-induced ROS formation and pollutants processing is not understood well. Here, ROS production and 2,4-DCP transformation during pyrite oxidation under oxic and anoxic atmospheres by Acidithiobacillus ferrooxidans (A. ferrooxidans) were explored. 2,4-DCP removal was enhanced in biosystem. Under oxic and anoxic conditions, microbially mediated pyrite oxidation resulted in removing 93.66% and 43.77% 2,4-DCP, which were 1.14- and 1.51-fold greater than that without cells. Based on intermediates identified by LC-MS, the transformation pathway of 2,4-DCP was proposed. The trapping experiments demonstrated ROS contributed during 2,4-DCP transformation. The improving effect of A. ferrooxidans on 2,4-DCP degradation was mainly due to ROS increase. A. ferrooxidans was to promote pyrite surface renew, exposing more Fe(II) and Fe(III) sites that facilitated O2 reduction and H2O dissociation for ROS generation. Biogenic ROS and sulfite bio-oxidation with the free radical mechanism provided other ROS sources. ESR revealed A. ferrooxidans-pyrite interaction led to sustainable ROS production, indicating it could be a significant pathway in driving geochemical cycles of elements.
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Affiliation(s)
- Shuang Zhou
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Ge Tong
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Xiaoyu Meng
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yanhong Wang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Guohua Gu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
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He P, Xiong Y, Chen Y, Liu M, Zhu J, Gan M. One-step synthesis of natural montmorillonite/hematite composites with enhanced persulfate catalytic activity for sulfamethoxazole degradation: Efficiency, kinetics, and mechanism. Environ Res 2022; 204:112326. [PMID: 34748776 DOI: 10.1016/j.envres.2021.112326] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/24/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
Along with rapid development of sulfate radicals-based advanced oxidation process, efficient, alternatively eco-friendly and cost-effective catalyst is of uppermost priority. However, expensive chemicals are used as source of metal in most of these catalysts, and lose sight of the abundant natural mineral resources on immediate surroundings. In this work, montmorillonite and hematite, two of abundantly natural minerals were utilized to prepare a persulfate catalyst (TMH@M) for sulfamethoxazole (SMX) degradation. The results indicated more than 91% of SMX was removed within 60 min in TMH@M/PS system. The degradation efficiency of SMX of TMH@M/PS combined system was impacted by SMX concentration, PS dosage and natural organic matters, and can remain stable in a certain concentration of HA/chelating agent and a wide pH range (3.01-9.06). Radical scavenging and EPR tests demonstrated 1O2, OH, and SO4- were major reactive oxygen species in the TMH@M/PS system, while the latter seems more important for degradation of SMX. The results of SEM-EDS, XRD and XPS conformed that low valence iron species (Fe0, Fe2+ and Fe3O4) on TMH@M surface are the main driving force behind PS activation to generate reactive species. Furthermore, the iron species on TMH@M surface were transformed during reaction, that in favor of mitigating metal leaching. This work presented a method based on ubiquitous natural minerals to prepare catalyst with excellent PS activate performance for organic wastewater treatment implying a new strategy in minerals utilization deeply and a promisingly alternative process for organic wastewater treatment based on mineral materials.
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Affiliation(s)
- Peng He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Yao Xiong
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Yaozong Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Mengfei Liu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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Ji Z, Huang B, Gan M, Fan X, Wang G, Zhao Q, Xing J, Yuan R. Dioxins control as co-processing water-washed municipal solid waste incineration fly ash in iron ore sintering process. J Hazard Mater 2022; 423:127138. [PMID: 34537647 DOI: 10.1016/j.jhazmat.2021.127138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/25/2021] [Accepted: 09/02/2021] [Indexed: 06/13/2023]
Abstract
Co-processing water-washed municipal solid waste incineration fly ash (WM-FA) in iron ore sintering process is of great prospect. In this paper, the emission characteristics of dioxins during sintering process combined with WM-FA were studied, and the control method for dioxins was proposed. The results showed that adding WM-FA in the form of pellets with diameter 5-8 mm slightly influenced sinter quality. Increasing the diameter of WM-FA from 5-8 mm to 10-12 mm helped to reduce the concentration of PCDD/Fs from 1.0425 ng I-TEQ/N m3 to 0.7720 ng I-TEQ/N m3. However, compared with no WM-FA adding case, adding WM-FA pellets caused the increase of PCDD/Fs concentration in the sintering flue gas. A novel method for dioxin control was proposed through preparing WM-FA into 5-8 mm pellets and coated with CaO-containing additive with its function to adsorb and fix HCl and Cl2, which were the key components to synthesize dioxin. Due to the inhibiting effect of CaO to the chlorination reaction, the emission concentration of PCDD/Fs was decreased to 0.6240 ng I-TEQ/N m3, which was lower than that of no WM-FA adding case. The research findings lay a foundation for the resource utilization of WM-FA and the harmonious development of city and steel plant.
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Affiliation(s)
- Zhiyun Ji
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Binbin Huang
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Min Gan
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China.
| | - Xiaohui Fan
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Guojing Wang
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China.
| | - Qianqian Zhao
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China; Baowu Group Environmental Resources Technology Co. Ltd., Shanghai 201900, PR China
| | - Jinxin Xing
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
| | - Ruirui Yuan
- School of Minerals Processing & Bioengineering, Central South University, No. 932, South Lushan Road, Changsha, Hunan Province, 410083, PR China
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van der Slot M, Remmers S, Van Leenders G, Muijlaert D, Busstra M, Gan M, Klaver O, Rietbergen J, Den Bakker M, Kweldam C, Bangma C, Roobol M, Venderbos L. Continence after introducing NeuroSAFE in radical prostatectomy. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)01221-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yang B, Luo W, Hong M, Wang J, Liu X, Gan M, Qiu G. Inhibition of hematite on acid mine drainage caused by chalcopyrite biodissolution. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Chen F, Lei P, He P, Gu C, Chen Y, Zhang K, Zhu J, Gan M. Enhancing Cr(VI) bio-reduction by conductive materials and enrichment of functional microbes under anaerobic conditions. Chemosphere 2022; 287:132150. [PMID: 34826896 DOI: 10.1016/j.chemosphere.2021.132150] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/14/2021] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
A few studies reported the impact of mineral conductivity properties on contaminant-mineral-microbe interactions and microbial community structure changes in the interaction process. To fill the gap, conductive minerals (magnetite/hematite) and an insulative mineral (quartz) were introduced into Cr(VI) reduction systems to investigate the effect of mineral conductivity properties on Cr(VI) removal. Results showed that conductive minerals enhanced Cr(VI) reduction rate as compared to insulative minerals. Higher reduction percentage (>86%) was observed when both ERB (extracellular respiratory bacteria) and conductive minerals were presence than those with only minerals (<10%) or ERB (<55%), indicating a synergistic effect existed in this bio-remediation system. Moreover, surface elements detection manifested higher Fe-containing groups and Fe(III)-Cr(III) complexes covered on conductive minerals surface when ERB was present. Electrochemical data suggested that ERB facilitated the activity of electron transference on the surface of conductive minerals. Our results indicated that conductive minerals did act as an "electron shuttle" while insulative minerals increased adsorption sites to accelerate Cr(VI) reduction. 16S rRNA sequences results demonstrated that conductive minerals changed the microbial community structure and increased the diversity of the functional microbes including Pseudomonas spp. and Exiguobacterium spp. This work is of deep significance for better understanding the process of elements biogeochemical and elimination of pollutants.
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Affiliation(s)
- Fang Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China; Environmental Microbiology, Institute of Biosciences, TU Bergakademie Freiberg, Leipziger Str.29, 09599, Freiberg, Germany
| | - Pan Lei
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Peng He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Chunyao Gu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Yaozong Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Ke Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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Liu J, Tang H, Gan M, Chen H, Shi X, Yuan H. Above-room Curie temperature and barrier-layer-dependent tunneling magnetoresistance in 1T-CrO2 monolayer based magnetic tunnel junction. Phys Chem Chem Phys 2022; 24:22007-22015. [DOI: 10.1039/d2cp01924h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Van der Waals (vdW) heterostructures based on two-dimensional (2D) ferromagnetic materials hold great potential applications in spintronics. Owing to high Curie temperature (TC) of 392 K as well as moderate...
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Cai M, Zeng J, Chen Y, He P, Chen F, Wang X, Liang J, Gu C, Huang D, Zhang K, Gan M, Zhu J. An efficient, economical, and easy mass production biochar supported zero-valent iron composite derived from direct-reduction natural goethite for Cu(II) and Cr(VI) remove. Chemosphere 2021; 285:131539. [PMID: 34329142 DOI: 10.1016/j.chemosphere.2021.131539] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/24/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
In this study, a novel biochar-supported zero-valent iron (ZVI) composite was synthesised by a one-pot co-pyrolysis reduction method, and was used to remove Cu(II) and Cr(VI). The raw materials for the composite were derived from natural bagasse/straw and goethite. Scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, Fourier-transform infrared (FTIR) spectroscopy, thermogravimetry (TG), and Brunauer-Emmett-Teller (BET) analysis were used to characterise the biochar and biochar-supported ZVI composites. Batch removal experiments on the effects of the initial pH and citric acid concentrations were performed as well as kinetic studies and isotherm experiments. The composite materials showed better Cu(II) and Cr(VI) removal performance than single biochar and mineral. The removal of Cu(II) and Cr(VI) is pH-dependent, and proceeds via heterogeneous multilayer chemisorption. Electrochemical analysis revealed that straw biochar-supported ZVI composite exhibited greater electrical conductivity and electron transfer rate than pure biochar and ZVI. FTIR spectroscopy and X-ray photoelectron spectroscopy (XPS) elucidated the uptake mechanism, showing that Cu(II) and Cr(VI) were easily adsorbed onto the biochar surface and were then reduced by ZVI. These results indicate that biochar-supported ZVI composite is effective for heavy metal remediation, which is economical, environment-friendly, and suitable for mass production.
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Affiliation(s)
- Miao Cai
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jian Zeng
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Yaozong Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Peng He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Fang Chen
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Xu Wang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Jinye Liang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Chunyao Gu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Dongli Huang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Ke Zhang
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China
| | - Min Gan
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
| | - Jianyu Zhu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha, 410083, China.
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Li J, Zhang B, Gan M, Li Y, He L, Yue W, Qiao H, Pei X, Li Y. Generation of SHMT2 knockout human embryonic stem cell line (WAe009-A-67) using CRISPR/Cas9 technique. Stem Cell Res 2021; 57:102581. [PMID: 34688993 DOI: 10.1016/j.scr.2021.102581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/18/2021] [Accepted: 10/17/2021] [Indexed: 10/20/2022] Open
Abstract
Serine hydroxymethyltransferase 2 (SHMT2), a catalytic enzyme playing an important role in aerobic cellular respiration and mitochondrial metabolism, might be pivotal in self-renewal and differentiation of human pluripotent stem cells. Herein, we used the CRISPR/Cas9 editing system to construct a homozygous SHMT2 knockout (SHMT2-KO) human embryonic stem cell (hESC) line, exhibiting a normal karyotype, colony morphology, and high expression levels of pluripotent proteins. Furthermore, SHMT2 knockout did not impact the self-renewal ability or differentiation potential into three germ layers of hESCs. Accordingly, this cell line provides a valuable model for further assessing SHMT2 functions in human embryonic development.
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Affiliation(s)
- Jisheng Li
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China
| | - Bowen Zhang
- Beijing Institute of Radiation Medicine, Beijing 100850, China; South China Research Center for Stem Cell & Regenerative Medicine, SCIB, Guangzhou 510005, China
| | - Min Gan
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China
| | - Yunxing Li
- Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Lijuan He
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China; South China Research Center for Stem Cell & Regenerative Medicine, SCIB, Guangzhou 510005, China
| | - Wen Yue
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China; South China Research Center for Stem Cell & Regenerative Medicine, SCIB, Guangzhou 510005, China
| | - Haixuan Qiao
- School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin 300070, China.
| | - Xuetao Pei
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China; South China Research Center for Stem Cell & Regenerative Medicine, SCIB, Guangzhou 510005, China.
| | - Yanhua Li
- Beijing Institute of Radiation Medicine, Beijing 100850, China; South China Research Center for Stem Cell & Regenerative Medicine, SCIB, Guangzhou 510005, China.
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50
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Gan M, Guan Y, Chen GY, Chen CLP. Recursive Variable Projection Algorithm for a Class of Separable Nonlinear Models. IEEE Trans Neural Netw Learn Syst 2021; 32:4971-4982. [PMID: 33017297 DOI: 10.1109/tnnls.2020.3026482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this article, we study the recursive algorithms for a class of separable nonlinear models (SNLMs) in which the parameters can be partitioned into a linear part and a nonlinear part. Such models are very common in machine learning, system identification, and signal processing. Utilizing the special structure of the SNLMs, we propose a recursive variable projection (RVP) algorithm, in which at each recursion, the linear parameters of the model are eliminated, and the nonlinear parameters are updated by the recursive Levenberg-Marquart algorithm. Then, based on the updated nonlinear parameters, the linear parameters are updated by the recursive least-squares algorithm. According to a convergence analysis of the RVP algorithm, the parameter estimation error is mean-square bounded. Numerical examples confirm the satisfactory performance of the proposed algorithm.
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