1
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Feng L, He R, Li H, Chen S, Lv C, Zhang S, Liu N, Shi Y, Liu G, Zhao G. An ultra-efficient pretreatment method adopted LPUV/CoFe 2O 4/PMS-based photolysis for accurate detection of Cd(II) and Pb(II) in water via SWASV. WATER RESEARCH 2024; 262:122066. [PMID: 39029395 DOI: 10.1016/j.watres.2024.122066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 07/07/2024] [Accepted: 07/08/2024] [Indexed: 07/21/2024]
Abstract
Dissolved organic matter (DOM) is a widely occurring substance in rivers that can strongly complex with heavy metal ions (HMIs), severely interfering with the electrochemical signal of anodic stripping voltammetry (ASV) and reducing the detection accuracy of HMIs in water. In this study, we investigated a novel advanced oxidation process (AOP) that involves the activation of peroxymonosulfate (PMS) using low-pressure ultraviolet (LPUV) radiation and CoFe2O4 photocatalysis. This novel AOP was used for the first time as an effective pretreatment method to break or weaken the complexation between HMIs and DOM, thereby restoring the electrochemical signals of HMIs. The key parameters, including the PMS concentration, CoFe2O4 concentration, and photolysis time, were optimized to be 6 mg/L, 12 mg/L, and 30 s for eliminating DOM interference during the electrochemical analysis of HMIs via LPUV/CoFe2O4-based photolysis. Investigations of the microstructure, surface morphology, specific surface area, and pore volume of CoFe2O4 were conducted to reveal the exceptional signal recovery capability of LPUV/CoFe2O4/PMS-based photolysis in mitigating interference from DOM during HMIs analysis. The PMS activation mechanism, which is critical to the signal recovery process, was elucidated by analyzing the reactive oxygen species (ROS) and the surface elemental composition of CoFe2O4. Additionally, the degradation and transformation behavior of humus-HMIs complexes were analyzed to study the mechanism of ASV signal recovery further. Notably, the detection results of HMIs in actual water samples obtained using the proposed pretreatment method were compared with those obtained from ICP-MS, yielding an RMSE less than 0.04 μg/L, which indicated the satisfactory performance of the proposed pretreatment method for the ASV detection of HMIs in complex actual samples.
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Affiliation(s)
- Liya Feng
- College of Engineering, Nanjing Agricultural University, Nanjing 210031, PR China
| | - Renjie He
- College of Engineering, Nanjing Agricultural University, Nanjing 210031, PR China
| | - Haonan Li
- College of Engineering, Nanjing Agricultural University, Nanjing 210031, PR China
| | - Shaowen Chen
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing 210031, PR China
| | - Cheng Lv
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing 210031, PR China
| | - Shijie Zhang
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing 210031, PR China
| | - Ning Liu
- Key Lab of Modern Precision Agriculture System Integration Research, Ministry of Education of China, China Agricultural University, Beijing 100083 PR China
| | - Yujie Shi
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing 210031, PR China
| | - Gang Liu
- Key Lab of Modern Precision Agriculture System Integration Research, Ministry of Education of China, China Agricultural University, Beijing 100083 PR China
| | - Guo Zhao
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing 210031, PR China.
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Ahlinder J, Eriksson KIA, Hellmér M, Salomonsson E, Granberg M, Dacklin I, Elving J, Brindefalk B. Upstream land use with microbial downstream consequences: Iron and humic substances link to Legionella spp. WATER RESEARCH 2024; 256:121579. [PMID: 38631237 DOI: 10.1016/j.watres.2024.121579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 03/28/2024] [Accepted: 04/05/2024] [Indexed: 04/19/2024]
Abstract
Intensified land use can disturb water quality, potentially increasing the abundance of bacterial pathogens, threatening public access to clean water. This threat involves both direct contamination of faecal bacteria as well as indirect factors, such as disturbed water chemistry and microbiota, which can lead to contamination. While direct contamination has been well described, the impact of indirect factors is less explored, despite the potential of severe downstream consequences on water supply. To assess direct and indirect downstream effects of buildings, farms, pastures and fields on potential water sources, we studied five Swedish lakes and their inflows. We analysed a total of 160 samples in a gradient of anthropogenic activity spanning four time points, including faecal and water-quality indicators. Through species distribution modelling, Random Forest and network analysis using 16S rRNA amplicon sequencing data, our findings highlight that land use indirectly impacts lakes via inflows. Land use impacted approximately one third of inflow microbiota taxa, in turn impacting ∼20-50 % of lake taxa. Indirect effects via inflows were also suggested by causal links between e.g. water colour and lake bacterial taxa, where this influenced the abundance of several freshwater bacteria, such as Polynucleobacter and Limnohabitans. However, it was not possible to identify direct effects on the lakes based on analysis of physiochemical- or microbial parameters. To avoid potential downstream consequences on water supply, it is thus important to consider possible indirect effects from upstream land use and inflows, even when no direct effects can be observed on lakes. Legionella (a genus containing bacterial pathogens) illustrated potential consequences, since the genus was particularly abundant in inflows and was shown to increase by the presence of pastures, fields, and farms. The approach presented here could be used to assess the suitability of lakes as alternative raw water sources or help to mitigate contaminations in important water catchments. Continued broad investigations of stressors on the microbial network can identify indirect effects, avoid enrichment of pathogens, and help secure water accessibility.
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Affiliation(s)
- Jon Ahlinder
- Division of CBRN Defence and Security, Swedish Defence Research Agency (FOI), Sweden; Department of Tree Breeding, Skogforsk, Sävar, SE-91821, Sweden
| | - Karolina Ida Anna Eriksson
- Department of Ecology and Environmental Sciences, Faculty of Science and Technology, Umeå University, Sweden; Umeå Marine Sciences Centre, Umeå University, Hörnefors, 905 71, Sweden.
| | - Maria Hellmér
- Department of Biology, Science Division, Swedish Food Agency, Sweden
| | - Emelie Salomonsson
- Division of CBRN Defence and Security, Swedish Defence Research Agency (FOI), Sweden
| | - Malin Granberg
- Division of CBRN Defence and Security, Swedish Defence Research Agency (FOI), Sweden
| | - Ingrid Dacklin
- Division of CBRN Defence and Security, Swedish Defence Research Agency (FOI), Sweden
| | - Josefine Elving
- Department of Chemistry, Environment and Feed Hygiene, Swedish Veterinary Agency, Sweden
| | - Björn Brindefalk
- Division of CBRN Defence and Security, Swedish Defence Research Agency (FOI), Sweden; Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Sweden
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3
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Xiao W, Zhang Q, Huang M, Zhao S, Chen D, Gao N, Chu T, Ye X. Biochar loaded with root exudates of hyperaccumulator Leersia hexandra Swartz facilitated Cr(VI) reduction by shaping soil functional microbial communities. CHEMOSPHERE 2024; 353:141636. [PMID: 38447895 DOI: 10.1016/j.chemosphere.2024.141636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 01/11/2024] [Accepted: 03/01/2024] [Indexed: 03/08/2024]
Abstract
Cr(VI) contamination is widely recognized as one of the major environmental hazards. To address the problem of remediation of soil Cr(VI) contamination and utilization of waste peanut shells, this study comprehensively investigated the effects of peanut shell-derived biochar loaded with root exudates of hyperaccumulator Leersia hexandra Swartz on Cr(VI) reduction and microbial community succession in soil. This study confirmed that root exudate-loaded peanut shell biochar reduced soil pH while simultaneously increasing DOC, sulfide, and Fe(II) concentrations, thereby facilitating the reduction of Cr(VI), achieving a reduction efficiency of 81.8%. Based on XPS and SEM elemental mapping analyses, Cr(VI) reduction occurred concurrently with the Fe and S redox cycles. Furthermore, the microbial diversity, abundance of the functional genera (Geobacter, Arthrobacter, and Desulfococcus) and the metabolic functions associated with Cr(VI) reduction were enhanced by root exudate-loaded biochar. Root exudate-loaded biochar can promote both direct Cr(VI) reduction mediated by the Cr(VI)-reducing bacteria Arthrobacter, and indirect Cr(VI) reduction through Cr/S/Fe co-transformation mediated by the sulfate-reducing bacteria Desulfococcus and Fe(III)-reducing bacteria Geobacter. This study demonstrates the effectiveness of peanut shell biochar loaded with root exudates of hyperaccumulator Leersia hexandra Swartz to promote soil Cr(VI) reduction, reveals the mechanism how root exudate-loaded biochar shapes functional microbial communities to facilitate Cr(VI) reduction, and proposes a viable strategy for Cr(VI) remediation and utilization of peanut shell.
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Affiliation(s)
- Wendan Xiao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Qi Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Miaojie Huang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Shouping Zhao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - De Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Na Gao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Tianfen Chu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
| | - Xuezhu Ye
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
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4
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Zhou Y, Zeng Z, Fu J, Gao Y, Ma J, Zhang Z, Zu D, Han B, Lu X, Ma J, Jiang J. New Insights into the Role of Humic Acid in Permanganate Oxidation of Diclofenac: A Novel Electron Transfer Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:4019-4028. [PMID: 38366980 DOI: 10.1021/acs.est.3c10703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
Humic acid (HA) ubiquitously existing in aquatic environments has been reported to significantly impact permanganate (KMnO4) decontamination processes. However, the underlying mechanism of the KMnO4/HA system remained elusive. In this study, an enhancing effect of HA on the KMnO4 oxidation of diclofenac (DCF) was observed over a wide solution pH range of 5-9. Surprisingly, the mechanism of HA-induced enhancement varied with solution pH. Quenching and chemical probing experiments revealed that manganese intermediates (Mn(III)-HA and MnO2) were responsible for the enhancement under acidic conditions but not under neutral and alkaline conditions. By combining KMnO4 decomposition, galvanic oxidation process experiments, electrochemical tests, and FTIR and XPS analysis, it was interestingly found that HA could effectively mediate the electron transfer from DCF to KMnO4 in neutral and alkaline solutions, which was reported for the first time. The formation of an organic-catalyst complex (i.e., HA-DCF) with lower reduction potential than the parent DCF was proposed to be responsible for the accelerated electron transfer from DCF to KMnO4. This electron transfer likely occurred within the complex molecule formed through the interaction between HA-DCF and KMnO4 (i.e., HA-DCF-KMnO4). These results will help us gain a more comprehensive understanding of the role of HA in the KMnO4 oxidation processes.
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Affiliation(s)
- Yang Zhou
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhu Zeng
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Junhao Fu
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Yuan Gao
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
| | - Jinxing Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhong Zhang
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Daoyuan Zu
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Bin Han
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Xixin Lu
- China MCC17 Group Co., Ltd., Ma'anshan 243000, Anhui, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jin Jiang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
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5
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Verrone V, Gupta A, Laloo AE, Dubey RK, Hamid NAA, Swarup S. Organic matter stability and lability in terrestrial and aquatic ecosystems: A chemical and microbial perspective. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167757. [PMID: 37852479 DOI: 10.1016/j.scitotenv.2023.167757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 10/20/2023]
Abstract
Terrestrial and aquatic ecosystems have specific carbon fingerprints and sequestration potential, due to the intrinsic properties of the organic matter (OM), mineral content, environmental conditions, and microbial community composition and functions. A small variation in the OM pool can imbalance the carbon dynamics that ultimately affect the climate and functionality of each ecosystem, at regional and global scales. Here, we review the factors that continuously contribute to carbon stability and lability, with particular attention to the OM formation and nature, as well as the microbial activities that drive OM aggregation, degradation and eventually greenhouse gas emissions. We identified that in both aquatic and terrestrial ecosystems, microbial attributes (i.e., carbon metabolism, carbon use efficiency, necromass, enzymatic activities) play a pivotal role in transforming the carbon stock and yet they are far from being completely characterised and not often included in carbon estimations. Therefore, future research must focus on the integration of microbial components into carbon mapping and models, as well as on translating molecular-scaled studies into practical approaches. These strategies will improve carbon management and restoration across ecosystems and contribute to overcome current climate challenges.
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Affiliation(s)
- Valeria Verrone
- National University of Singapore Environmental Research Institute, National University of Singapore,117411, Singapore
| | - Abhishek Gupta
- Singapore Centre of Environmental Engineering and Life Sciences, National University of Singapore, Singapore.
| | - Andrew Elohim Laloo
- National University of Singapore Environmental Research Institute, National University of Singapore,117411, Singapore; Singapore Centre of Environmental Engineering and Life Sciences, National University of Singapore, Singapore
| | - Rama Kant Dubey
- National University of Singapore Environmental Research Institute, National University of Singapore,117411, Singapore; Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore; Department of Biotechnology, GLA University, Mathura, Uttar Pradesh 281406, India
| | - Nur Ashikin Abdul Hamid
- National University of Singapore Environmental Research Institute, National University of Singapore,117411, Singapore
| | - Sanjay Swarup
- National University of Singapore Environmental Research Institute, National University of Singapore,117411, Singapore; Singapore Centre of Environmental Engineering and Life Sciences, National University of Singapore, Singapore; Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
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6
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Vašková J, Stupák M, Vidová Ugurbaş M, Žatko D, Vaško L. Therapeutic Efficiency of Humic Acids in Intoxications. Life (Basel) 2023; 13:life13040971. [PMID: 37109500 PMCID: PMC10143271 DOI: 10.3390/life13040971] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/03/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Humins, humic and fulvic acids represent molecules with complex structures. These compounds comprising humic substances (HS) exist naturally in soil, brown coal, peat, and water. They are formed during the decomposition and transformation of organic matter (animal and plant remains) and their formation explains several theories. Within their chemical structures, there are numerous phenolic and carboxyl groups and their derivatives that affect their different properties, such as their solubility in water or their absorption of cations or mycotoxins. The manifold chemical structure of HS alters their polyelectrolyte character and thus their chelating efficiency. For many years, HS have been studied due to their detoxification, anti-, and pro-inflammatory or anticancer and antiviral ability. This article summarizes the antioxidant and adsorption properties of humic acids, highlighting their usefulness in intoxications.
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Affiliation(s)
- Janka Vašková
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University, 040 11 Košice, Slovakia
| | - Marek Stupák
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University, 040 11 Košice, Slovakia
| | - Martina Vidová Ugurbaş
- Second Department of Surgery, Faculty of Medicine, Pavol Jozef Šafárik University, 040 11 Košice, Slovakia
| | - Daniel Žatko
- Imuna Pharm, a.s., Šarišské Michaľany, 082 22 Presov, Slovakia
| | - Ladislav Vaško
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University, 040 11 Košice, Slovakia
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Chakraborty P, Manek A, Chakraborty S, Hudson J, Niyogi S. Investigating the combined effects of pH changes and UV radiation exposure on dissolved metal-humate complexes: an important process in aquatic systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:58189-58199. [PMID: 36976468 DOI: 10.1007/s11356-023-26178-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 02/24/2023] [Indexed: 05/10/2023]
Abstract
An in vitro study was carried out to examine the impact of UV exposure on metal-dissolved humic material (M-DHM) complexes in aqueous systems at different pH. Complexation reactions of dissolved M (Cu, Ni, and Cd) with DHM increased with the increasing pH of the solution. Kinetically inert M-DHM complexes dominated at higher pH in the test solutions. Exposure to UV radiation did affect the chemical speciation of M-DHM complexes at different pH of the systems. The overall observation suggests that exposure to increasing UV radiation increased the lability, mobility, and bioavailability of M-DHM complexes in aquatic environments. The dissociation rate constant of Cu-DHM was found to be slower than Ni-DHM and Cd-DHM complexes (both before and after UV exposure). At a higher pH range, Cd-DHM complexes dissociated after exposure to UV radiation and a part of this dissociated Cd precipitated out from the system. No change in the lability of the produced Cu-DHM and Ni-DHM complexes after UV radiation exposure was observed. They did not appear to form new kinetically inert complexes even after 12 h of exposure. The outcome of this research has important global implications. The results of this study helped to understand DHM leachability from soil and its effect on dissolved metal concentrations in the Northern Hemisphere water bodies. The results of this study also facilitated to comprehend the fate of M-DHM complexes at photic depths (where pH changes are accompanied by high UV radiation exposure) in tropical marine/freshwater systems during summer.
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Affiliation(s)
- Parthasarathi Chakraborty
- Marine Trace Metal Biogeochemistry Laboratory, The Centre for Ocean, River, Atmosphere and Land Sciences (CORAL), Indian Institute of Technology, Kharagpur, West Bengal, 721302, India.
| | - Aditya Manek
- Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Sucharita Chakraborty
- Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, West Bengal, 721302, India
| | - Jeff Hudson
- Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Som Niyogi
- Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Kong X, Luo G, Yan B, Su N, Zeng P, Kang J, Zhang Y, Xie G. Dissolved organic matter evolution can reflect the maturity of compost: Insight into common composting technology and material composition. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 326:116747. [PMID: 36436247 DOI: 10.1016/j.jenvman.2022.116747] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/31/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
Dissolved organic matter (DOM) can clearly reflect composting components changes, thus it is supposed to indicate the humification process during composting. To demonstrate this, three compost mixtures and two techniques were arranged. DOM evolution was detected by three spectral techniques. X-ray diffraction (XRD) showed that the crystal structure substances decreased gradually during the composting, including cellulose, struvite, sylvine, quartz, and calcite; Specifically, the struvite was found, which was conducive to the fixation of nitrogen and phosphorus. Fourier transform infrared spectroscopy (FTIR) and three-dimensional fluorescence spectroscopy (3D-EEM) further showed that pig manure-based mixtures, added cabbage, and windrow composting are beneficial to sugar, protein, fulvic acid, and soluble microbial by-products decompose and humic acids produce. This process was closely related to the change of physical-chemical parameters (temperature; pH; moisture content; and NH4+-N content) and maturity index (C/N ratio, E4/E6 and GI). Therefore, DOM evolution could quickly reflect the maturity process of compost. In subsequent research, the quantitative analysis of DOM components can be considered to modify DOM spectral parameters, or to build a model, so as to achieve rapid evaluation of compost maturity.
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Affiliation(s)
- Xiaoliang Kong
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Gongwen Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China; Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Binghua Yan
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Ning Su
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Peng Zeng
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Jialu Kang
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Yuping Zhang
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China; Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Guixian Xie
- College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China; Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China.
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9
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Kermeur N, Pédrot M, Cabello-Hurtado F. Iron Availability and Homeostasis in Plants: A Review of Responses, Adaptive Mechanisms, and Signaling. Methods Mol Biol 2023; 2642:49-81. [PMID: 36944872 DOI: 10.1007/978-1-0716-3044-0_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Iron is an essential element for all living organisms, playing a major role in plant biochemistry as a redox catalyst based on iron redox properties. Iron is the fourth most abundant element of the Earth's crust, but its uptake by plants is complex because it is often in insoluble forms that are not easily accessible for plants to use. The physical and chemical speciation of iron, as well as rhizosphere activity, are key factors controlling the bioavailability of Fe. Iron can be under reduced (Fe2+) or oxidized (Fe3+) ionic forms, adsorbed onto mineral surfaces, forming complexes with organic molecules, precipitated to form poorly crystalline hydroxides to highly crystalline iron oxides, or included in crystalline Fe-rich mineral phases. Plants must thus adapt to a complex and changing iron environment, and their response is finely regulated by multiple signaling pathways initiated by a diversity of stimulus perceptions. Higher plants possess two separate strategies to uptake iron from rhizosphere soil: the chelation strategy and the reduction strategy in grass and non-grass plants, respectively. Molecular actors involved in iron uptake and mobilization through the plant have been characterized for both strategies. All these processes that contribute to iron homeostasis in plants are highly regulated in response to iron availability by downstream signaling responses, some of which are characteristic signaling signatures of iron dynamics, while others are shared with other environmental stimuli. Recent research has thus revealed key transcription factors, cis-acting elements, post-translational regulators, and other molecular mechanisms controlling these genes or their encoded proteins in response to iron availability. In addition, the most recent research is increasingly highlighting the crosstalk between iron homeostasis and nutrient response regulation. These regulatory processes help to avoid plant iron concentrations building up to potential cell functioning disruptions that could adversely affect plant fitness. Indeed, when iron is in excess in the plant, it can lead to the production and accumulation of dangerous reactive oxygen species and free radicals (H2O2, HO•, O2•-, HO•2) that can cause considerable damages to most cellular components. To cope with iron oxidative stress, plants have developed defense systems involving the complementary action of antioxidant enzymes and molecular antioxidants, safe iron-storage mechanisms, and appropriate morphological adaptations.
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Affiliation(s)
- Nolenn Kermeur
- University of Rennes, CNRS, Ecobio, UMR 6553, Rennes, France
- University of Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
| | - Mathieu Pédrot
- University of Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
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10
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Chen D, Li Y, Jiang Q, Chen C, Xiao Z. Biogenic ferrihydrite-humin coprecipitate as an electron donor for the enhancement of microbial denitrification by Pseudomonas stutzeri. ENVIRONMENTAL RESEARCH 2023; 216:114837. [PMID: 36400223 DOI: 10.1016/j.envres.2022.114837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/30/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Nitrate pollution of groundwater has become an increasingly serious environmental problem that poses a great threat to aquatic ecosystems and to human health. Previous studies have shown that solid-phase humin (HM) can act as an additional electron donor to support microbial denitrification in the bioremediation of nitrate-contaminated groundwater where electron donor is deficient. However, the electron-donating capacities of HMs vary widely. In this study, we introduced ferrihydrite and prepared ferrihydrite-humin (Fh-HM) coprecipitates via biotic means to strengthen their electron-donating capacities. The spectroscopic results showed that the crystal phase of Fh did not change after coprecipitation with HM in the presence of Shewanella oneidensis MR-1, and iron may have complexed with the organic groups of HM. The Fh-HM coprecipitate prepared with an optimal initial Fh-HM mass ratio of 14:1 enhanced the microbial denitrification of Pseudomonas stutzeri with an electron-donating capacity 2.4-fold higher than that of HM alone, and the enhancement was not caused by greater bacterial growth. The alginate bead embedding assay indicated that the oxidation pathway of Fh-HM coprecipitate was mainly through direct contact between P. stutzeri and the coprecipitate. Further analyses suggested that quinone and organic-complexed Fe were the main electron-donating fractions of the coprecipitate. The results of the column experiments demonstrated that the column filled with Fh-HM-coated quartz sand exhibited a higher denitrification rate than the one filled with quartz sand, indicating its potential for practical applications.
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Affiliation(s)
- Dan Chen
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Yi Li
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Qitao Jiang
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Chuang Chen
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China
| | - Zhixing Xiao
- College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China.
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11
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Hao L, Li L, Wang B, Wang X, Shi J, Shi C, Hao X. Performance and Enhancement of Various Fillers Guiding Vanadium (V) Bioremediation. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:14926. [PMID: 36429645 PMCID: PMC9691244 DOI: 10.3390/ijerph192214926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Bioremediation of vanadium (V) pollution in groundwater is an emerging topic. However, knowledge of V in a biogeochemical process is limited and long-term effective removal methods are lacking. V(V) remediation processes by various kinds of auxiliary fillers (maifanite-1, maifanite-2, volcanic rock, green zeolite and ceramsite), agricultural biomass and microbial enhancing were explored in this study. In tests without inocula, the V(V) removal efficiencies of ceramsite (inert filler) and maifanite-2 (active filler) were 84.9% and 60.5%, respectively. When inoculated with anaerobic sludge, 99.9% of V(V) could be removed with the synergistic performance of straw and maifanite-2. TOC (Total Organic Carbon), trace elements and three-dimensional fluorescence analyses confirmed that maifanite-2 was the most suitable among various fillers in biological V(V) removal systems with straw. This study provides a collaborative method (adsorption-biology) by using straw with maifanite-2 in V(V)-contaminated groundwater. The knowledge gained in this study will help develop permeable reactive barrier technology to repair polluted groundwater to put forward a reasonable, effective and sustainable environmental treatment strategy.
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12
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Wu M, Wang Q, Wang C, Zeng Q, Li J, Wu H, Wu B, Xu H, Qiu Z. Strategy for enhancing Cr(VI)-contaminated soil remediation and safe utilization by microbial-humic acid-vermiculite-alginate immobilized biocomposite. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 243:113956. [PMID: 35964397 DOI: 10.1016/j.ecoenv.2022.113956] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/21/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Bioreduction is an efficient approach to in-situ remediate Cr(VI)-contaminated soil, but further strengthening methods are still urgently needed. Herein, a novel immobilized biocomposite (B-HA-VE-SA) was successfully synthesized by embedding a efficient strain Bacillus sp. CRB-7 with humic acid (HA) combined vermiculite (VE) and sodium alginate (SA). The performance and enhancement mechanism of the immobilized biocomposite on remediating Cr(VI)-contaminated soil were also investigated by analyzing the whole-genome of CRB-7, Cr(VI) detoxification, soil microecological regulation, and subsequent crop growth response. Genomic annotation demonstrated that CRB-7 contains multiple genes contributed to Cr(VI) tolerance, Cr(VI) reduction and other metals resistance. Results showed that embedded CRB-7 biocomposites exhibited more effective reduction of Cr(VI) in soil compared with control and free CRB-7 treatment, especially B-HA-VE-SA achieved the highest Cr(VI) removal efficiency (96.18%) and the residual Cr proportion (49.04%) via multiple mechanisms including carrier effects, nutrient sustained-release, and electron-shuttle effect enhanced the bioremediation process. Furthermore, the synergies of CRB-7 and immobilizers (HA, VE and SA) significantly improved soil microecology (soil enzyme activities, microbial quantity and diversity), and engendered the evolution of microbial community composition and functional pathways. Consequently, pot experiments (Brassica napus L.) verified the plant-growth-promoting (12.00-18.00% and 43.82-69.00% higher in emergence rate and biomass) and Cr-accumulation-reducing effects (19.47-91.09% and 29.11-89.80% lower in root and aerial parts) of free and immobilized CRB-7. Taken together, these findings highlighted the superiority of B-HA-VE-SA in simultaneous remediation, microecological improvement and safe utilization of Cr(VI)-contaminated soil.
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Affiliation(s)
- Minghui Wu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Qiqi Wang
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Can Wang
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Qilu Zeng
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Jianpeng Li
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Han Wu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China
| | - Bin Wu
- College of Ecology and Environment, Chengdu University of Technology, 1# Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Heng Xu
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China.
| | - Zhongping Qiu
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China.
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Islam MR, Sanderson P, Payne TE, Deb AK, Naidu R. Role of beryllium in the environment: Insights from specific sorption and precipitation studies under different conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:155698. [PMID: 35523347 DOI: 10.1016/j.scitotenv.2022.155698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/24/2022] [Accepted: 04/30/2022] [Indexed: 06/14/2023]
Abstract
In this study, we examined factors influencing the environmental behaviour of Be, specifically considering soils collected from a legacy radioactive waste disposal site near Sydney (Australia). The precipitation study showed the formation of Be(OH)2 (amorphous) from ICP standard solution, but a mixture of Be(OH)2 (alpha), Be(OH)2 (beta) and ternary Na/S-Be (ΙΙ)-OH(s) solid phase were formed from BeSO4 solutions. The precipitation of Be started at relatively lower pH at higher concentrations than at the lower Be concentration as indicated by both laboratory data and simulation. Across the pH range, the Be sorption curve was divided into three phases, these being pH 3-6, pH 6-10, and pH > 10, within which sorption of Be with soil was 9-97%, 90-97%, and 66-90%, respectively. Beryllium solubility was limited at pH > 7, but a sorption study with soil showed chemisorption under both acidic and alkaline pH (pH 5.5 and 8) conditions, which was confirmed by FTIR and XPS analysis. At pH 5.5 (specifically relevant to the study site), sorption of Be was 72-95%, in which 77% and 46% Be was respectively sorbed by separated fulvic and humic acid fractions. The irreversible chemisorption mechanism was controlled by SOM at higher pH, and by metal oxyhydroxides at lower pH. Both organic and inorganic components synergistically influence the specific chemisorption of Be at the intermediate pH 5.5 of field soil.
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Affiliation(s)
- Md Rashidul Islam
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia.
| | - Peter Sanderson
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia
| | - Timothy E Payne
- Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW 2234, Australia
| | - Amal Kanti Deb
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; Institute of Leather Engineering and Technology, University of Dhaka, Dhaka 1000, Bangladesh
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia; CRC for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle (UoN), University Drive, Callaghan Campus, NSW 2308, Australia.
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14
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Xiao W, Ye X, Ye Z, Zhang Q, Zhao S, Chen D, Gao N, Huang M. Responses of microbial community composition and function to biochar and irrigation management and the linkage to Cr transformation in paddy soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 304:119232. [PMID: 35364188 DOI: 10.1016/j.envpol.2022.119232] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 02/25/2022] [Accepted: 03/27/2022] [Indexed: 06/14/2023]
Abstract
Combining biochar with irrigation management to alter the microbial community is a sustainable method for remediating soils contaminated by heavy metals. However, studies on how these treatments promote Cr(VI) reduction are limited, and the corresponding microbial mechanisms are unclear. Therefore, we conducted a pot experiment to explore the responses of soil microbial communities to combined biochar amendment and irrigation management strategies and their involvement in Cr transformation in paddy soils. Six treatments were established using varying concentrations of biochar (0, 1, and 2% [w/w]) combined with two irrigation management strategies (continuous flooding [CF] and dry-wet alternation [DWA]). The results showed that the combined biochar addition and irrigation management strategy significantly altered soil pH, redox potential, organic matter content, and Fe(II) and sulfide concentrations. In addition, the Cr(VI) concentration under CF irrigation management was conspicuously lower (48.2-54.4%) than that under DWA irrigation management. Biochar amendment also resulted in a substantial reduction (8.8-27.4%) in Cr(VI) concentration. Moreover, the changes in soil physicochemical properties remarkably affected the soil microbial community. The microbial diversity and abundance significantly increased with biochar amendment. Furthermore, the combined biochar amendment and CF strategy stimulated the growth of Geobacter- and Anaeromyxobacter-related Fe(III)-reducing bacteria, Gallionella-related Fe(II)-oxidizing bacteria, and Desulfovibro- and Clostridium-related sulfate-reducing bacteria, which simultaneously facilitated the generation of Fe(II) and sulfide, thereby enhancing Cr(VI) reduction. Consequently, our results suggest that the effectively increased abundance of Fe-reducing/oxidizing bacteria and sulfate-reducing bacteria via combined CF irrigation management and biochar addition may be a key factor in reducing Cr(VI) in paddy soil. The keystone genera responsible for Cr(VI) reduction were Geobacter, Anaeromyxobacter, Gallionella, Desulfovibro, and Clostridium. This study provides novel insights into the coupling mechanism of the Fe/S/Cr transformation mediated by Fe-reducing/oxidizing bacteria and sulfate-reducing bacteria.
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Affiliation(s)
- Wendan Xiao
- Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Xuezhu Ye
- Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
| | - Zhengqian Ye
- College of Environmental and Resource Sciences, Zhejiang A&F University, Hangzhou, 311300, China
| | - Qi Zhang
- Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Shouping Zhao
- Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - De Chen
- Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Na Gao
- Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Miaojie Huang
- Key Laboratory of Information Traceability for Agricultural Products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
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15
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Lehto J, Heikkinen J, Nickull AR, Junnikkala V, Soimasuo J. Removal of humic substances from surface waters with recycled fluidized bed sand. ENVIRONMENTAL TECHNOLOGY 2022; 43:2844-2854. [PMID: 33734920 DOI: 10.1080/09593330.2021.1906327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Recycled bed sand from a power plant's fluidized bed reactor was used to remove humic substances (HSs) from surface water samples. The performance of sand samples screened into different size fractions together with unscreened sand was evaluated in removing HSs by performing shaking and column experiments, and by monitoring the quality of the treated water samples in terms of pH, conductivity, chemical oxygen demand (COD), and colour. At the beginning of the column experiments, the used sand fractions removed HSs with over 80% efficiency. However, as the experiments proceeded, the removal efficiency rapidly decreased, reaching a steady state during which a column filled with small-particle-size screened sand removed 20-25% of the COD and colour at a 2.2 kg/h flow speed, and 25-35% of the COD and 30-35% of the colour at a slow 0.5 kg/h flow speed. With unscreened sand, the corresponding COD and colour removal efficiencies were 10-20% (COD) and 10-18% (colour) for fast column experiments, and 22-27% for COD and 25-30% for colour during slow column experiments. Elemental analysis revealed that recycled fluidized bed sand contained several cationic compounds known to form complexes with HSs. Especially calcium together with aluminium and iron are potential candidates for removing colour and COD from the water samples.HighlightsRecycled fluidized bed sand could be used as a low-cost adsorbent material for removing HSs from surface water samplesEspecially the COD and colour of the water samples could be reduced by the sand treatmentsFluidized bed sand contained several cationic compounds forming complexes with HSsNo significant amounts of heavy metals were leached during the sand treatments.
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Affiliation(s)
- Joni Lehto
- VTT Technical Research Centre of Finland, Ltd., Espoo, Finland
| | - Juha Heikkinen
- VTT Technical Research Centre of Finland, Ltd., Espoo, Finland
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16
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Li Q, Wang Y, Li Y, Li L, Tang M, Hu W, Chen L, Ai S. Speciation of heavy metals in soils and their immobilization at micro-scale interfaces among diverse soil components. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 825:153862. [PMID: 35176361 DOI: 10.1016/j.scitotenv.2022.153862] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/25/2022] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
Heavy metal (HM) pollution of soils is a globally important ecological and environmental problem. Previous studies have focused on i) tracking pollution sources in HM-contaminated soils, ii) exploring the adsorption capacity and distribution of HMs, and iii) assessing phyto-uptake of HMs and their ecotoxicity. However, few reviews have systematically summarized HM pollution in soil-plant systems over the past decade. Understanding the mechanisms of interaction between HMs and solid soil components is consequently key to effectively controlling and remediating HM pollution. However, the compositions of solid soil phases are diverse, their structures are complex, and their spatial arrangements are heterogeneous, all leading to the formation of soil micro-domains that exhibit different particle sizes and surface properties. The various soil components and their interactions ultimately control the speciation, transformation, and bioavailability of HMs in soils. Over the past few decades, the extensive application of advanced instrumental techniques and methods has greatly expanded our understanding of the behavior of HMs in organic mineral assemblages. In this review, studies investigating the immobilization of HMs by minerals, organic compounds, microorganisms, and their associated complexes are summarized, with a particular emphasis on the interfacial adsorption and immobilization of HMs. In addition, methods for analyzing the speciation and distribution of HMs in aggregates of natural soils with different particle sizes are also discussed. Moreover, we also review the methods for speciating HMs at mineral-organic micro-scale interfaces. Lastly, developmental prospects for HM research at inorganic-organic interfaces are outlined. In future research, the most advanced methods should be used to characterize the interfaces and in situ characteristics of metals and metal complexes. In particular, the roles and contributions of microorganisms in the immobilization of HMs at complex mineral-organic interfaces require significant further investigation.
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Affiliation(s)
- Qi Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China; Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Yanhong Wang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China; Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Yichun Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China; Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Linfeng Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China; Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Mingdeng Tang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China; Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Weifang Hu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China; Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Li Chen
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Shaoying Ai
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China; Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China.
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17
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Wang Z, Yao Y, Yang Y. Fulvic acid-like substance-Ca(II) complexes improved the utilization of calcium in rice: Chelating and absorption mechanism. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 237:113502. [PMID: 35447470 DOI: 10.1016/j.ecoenv.2022.113502] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
Water-soluble chelated calcium has been widely used in agriculture as a fertilizer to improve the absorption and utilization of calcium by plants. This paper prepared a new organic mineral fertilizer, based on fulvic acid-like substance chelated calcium (PFA-Ca2+ complex), using optimal parameters (i.e., pH, time, temperature, and Ca2+ concentration) to achieve a high chelation efficiency. The absorption, utilization, and distribution of the PFA-Ca2+ complex in rice roots were analyzed using laser scanning confocal microscopy (LSCM). Our results demonstrated that the optimal PFA-Ca2+ complex chelating efficiency (87%) was achieved at an initial Ca2+ concentration of 0.1 mol L-1, an equilibration time of 120 min, a pH of 5.0, and a temperature of 40 °C. The chelating reaction of a fulvic acid-like substance with Ca2+ primarily occurred on phenol hydroxyl, alcohol hydroxyl, and carboxyl groups. The PFA-Ca2+ complex was primarily enriched in the roots' pericycle, cortical, and epidermis cells, in both chelating and non-chelating forms. To our knowledge, this is the first report investigating how the PFA-Ca2+complex affects transformation in plants, which has significant implications for research on plant nutrition and nutrient distribution.
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Affiliation(s)
- Zhonghua Wang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources; National Engineering & Technology Research Center for Slow and Controlled-Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Daizong Road No. 61, Taian, Shandong 271018, China
| | - Yuanyuan Yao
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources; National Engineering & Technology Research Center for Slow and Controlled-Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Daizong Road No. 61, Taian, Shandong 271018, China
| | - Yuechao Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources; National Engineering & Technology Research Center for Slow and Controlled-Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Daizong Road No. 61, Taian, Shandong 271018, China; Department of Soil and Water Science, Tropical Research and Education Center, University of Florida, Homestead, FL 33031, United States.
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18
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Na J, Kim Y, Song J, Shim T, Cho K, Jung J. Evaluation of the combined effect of elevated temperature and cadmium toxicity on Daphnia magna using a simplified DEBtox model. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 291:118250. [PMID: 34597733 DOI: 10.1016/j.envpol.2021.118250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 08/26/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
Thermal discharge and heatwaves under climate change may increase water temperature. In this study, the individual and combined effect of elevated temperature and cadmium (Cd) toxicity on somatic growth and reproduction of Daphnia magna was evaluated using a simplified dynamic energy budget model (DEBtox). The model predicted that the maximum body length (Lm) would be shorter (3.705 mm) at an elevated temperature of 25 °C than at 20 °C (3.974 mm), whereas the maximum reproduction rate (R˙m) would be higher at 25 °C (5.735) than at 20 °C (5.591). The somatic growth and reproduction of D. magna were significantly (p < 0.05) reduced with increasing Cd concentrations, and the reduction was greater at 25 than at 20 °C. Potentiation of Cd toxicity by elevated temperature was correctly simulated by assuming four toxicological modes of action influencing assimilation, somatic maintenance and growth, and reproduction. Overall, the population growth rate of D. magna was expected to decrease linearly with increasing Cd concentrations, and the decrease was expected to be higher at 25 than at 20 °C. These findings suggest a significant ecological risk of toxic metals at elevated temperature, with a mechanistic interpretation of the potentiation effect using a DEBtox modeling approach.
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Affiliation(s)
- Joorim Na
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yongeun Kim
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jinyoung Song
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Taeyong Shim
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Kijong Cho
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jinho Jung
- Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
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19
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Jones MR, Tebo BM. Novel manganese cycling at very low ionic strengths in the Columbia River Estuary. WATER RESEARCH 2021; 207:117801. [PMID: 34741899 DOI: 10.1016/j.watres.2021.117801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Mixing of waters of different ionic strengths induces the geochemical cycling of reactive elements. The most reactive zone is where the gradient in ionic strength is steepest. In oxygenated systems, the redox-active metal manganese cycles between soluble and particulate fractions through three oxidation states, manganese(II), manganese(III) and manganese(IV). This cycling strongly affects the mobility of inorganic and organic chemicals. The most accessible environmental system where waters with different ionic strengths mix are estuaries. During six Eulerian studies in the Columbia River Estuary, each up to 26 h, we measured manganese speciation and concentration across a salinity (SP) gradient centred around SP = 0.06-6, equivalent to a seawater ionic strength (ISp) of 1.2-120 mM. This zone, representing the region between freshwater and the more intensively studied estuarine turbidity maximum, presents a highly dynamic geochemical environment in which the manganese cycle propagates through four steps as ISp increases due to mixing: 1. Before a measurable change in ISp, manganese, as particulate manganese(III/IV) oxides (MnOx), undergoes reduction, independent of photochemical processes, to soluble manganese(III) stabilized in organic complexes (Mn(III)-L) and manganese(II); 2. As ISp increases between 5 and 80 mM, Mn(III)-L reduction continues and manganese(II) adsorbs onto particle surfaces; 3. As ISp increases further, though remaining below 80 mM (SP ≈ 4), adsorbed manganese(II) desorbs and/or is oxidized and is released as Mn(III)-L or oxidises further to MnOx; 4. The breakdown of Mn(III)-L complexes leads to higher manganese(II) and MnOx, which at Mid-Estuary-Salinities (ISp = 320-480 mM) precipitates. This manganese cycling in low ISp waters directly affects a system's redox chemistry and provides a window into understanding the extensive, yet hidden, freshwater/saline water interface in aquifers, soils, sediments and estuaries.
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Affiliation(s)
- Matthew Ross Jones
- Division of Environmental and Biomolecular Systems, Oregon Health & Science University, Portland, OR 97239, USA.
| | - Bradley M Tebo
- Division of Environmental and Biomolecular Systems, Oregon Health & Science University, Portland, OR 97239, USA
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20
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Islam MR, Sanderson P, Payne TE, Johansen MP, Naidu R. Desorption and Migration Behavior of Beryllium from Contaminated Soils: Insights for Risk-Based Management. ACS OMEGA 2021; 6:30686-30697. [PMID: 34805696 PMCID: PMC8600622 DOI: 10.1021/acsomega.1c04572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 10/22/2021] [Indexed: 05/25/2023]
Abstract
Factors influencing the desorption, distribution, and vertical migration behavior of Be in contaminated soils are not fully understood. This study examined the desorption and migration of Be in a soil profile from a legacy radioactive waste disposal site using different batch leaching [monofilled waste extraction procedure (MWEP); synthetic precipitation leaching procedure (SPLP); simulated acid rain solution (SARS); and toxicity characteristic leaching procedure] and sequential leaching [community bureau of reference (BCR)] methods for insights relevant to the application of risk-based management. The results showed that Be desorption was higher in the presence of organic than the inorganic leachate composition (MWEP < SPLP < SARS < TCLP < BCR first-step). The desorption followed three diffusion control mechanisms, which resulted in three desorption rate constant estimates of 157, 87.1, and 40.4 Be/kg.h0.5, and the estimated desorption maximum was 556 μg/kg. The desorption process was, spontaneous (ΔG > 0), enthalpically and entropically influenced. Increasing the incubation period and heat treatment resulted in a decrease of Be desorption and migration. The soil clay content and pH were the primary factors influencing Be desorption, and the results suggested that Be was desorbed from metal oxyhydroxides and surfaces of silicates (e.g., reactive surfaces of clay minerals), organic matters, and soil pores. Because of high K d values, the mobility of Be was limited, and no exceedances of ecological or human health risk index or guidelines were determined for the current contamination levels at the site. However, Be released from the waste trenches has the ongoing potential to increase Be concentration in the soil.
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Affiliation(s)
- Md. Rashidul Islam
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment; The University
of Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of the
Environment (CRC CARE), The University of
Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
| | - Peter Sanderson
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment; The University
of Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of the
Environment (CRC CARE), The University of
Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
| | - Timothy E. Payne
- Australian
Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, New South Wales 2234, Australia
| | - Mathew P. Johansen
- Australian
Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, New South Wales 2234, Australia
| | - Ravi Naidu
- Global
Centre for Environmental Remediation (GCER), College of Engineering,
Science and Environment; The University
of Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
- Cooperative
Research Centre for Contamination Assessment and Remediation of the
Environment (CRC CARE), The University of
Newcastle (UoN), University
Drive, Callaghan Campus, Callaghan, New South Wales 2308, Australia
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21
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Preparation of modified mineralized fulvic acid for inhibition of crystallization of calcium phosphate. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01855-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Nazri AI, Ahmad AL, Hussin MH. Microcrystalline Cellulose-Blended Polyethersulfone Membranes for Enhanced Water Permeability and Humic Acid Removal. MEMBRANES 2021; 11:660. [PMID: 34564477 PMCID: PMC8467366 DOI: 10.3390/membranes11090660] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/18/2021] [Accepted: 08/21/2021] [Indexed: 11/30/2022]
Abstract
A novel polyethersulfone (PES)/microcrystalline cellulose (MCC) composite membrane for humic acid (HA) removal in water was fabricated using the phase inversion method by blending hydrophilic MCC with intrinsically hydrophobic PES in a lithium chloride/N,N-dimethylacetamide (LiCl/DMAc) co-solvent system. A rheological study indicated that the MCC-containing casting solutions exhibited a significant increase in viscosity, which directly influenced the composite membrane's pore structure. Compared to the pristine PES membrane, the composite membranes have a larger surface pore size, elongated finger-like structure, and presence of sponge-like pores. The water contact angle and pure water flux of the composite membranes indicated an increase in hydrophilicity of the modified membranes. However, the permeability of the composite membranes started to decrease at 3 wt.% MCC and beyond. The natural organic matter removal experiments were performed using humic acid (HA) as the surface water pollutant. The hydrophobic HA rejection was significantly increased by the enhanced hydrophilic PES/MCC composite membrane via the hydrophobic-hydrophilic interaction and pore size exclusion. This study provides insight into the utilization of a low-cost and environmentally friendly additive to improve the hydrophilicity of PES membranes for efficient removal of HA in water.
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Affiliation(s)
- Amirul Islah Nazri
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia;
| | - Abdul Latif Ahmad
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Pulau Pinang, Malaysia;
| | - Mohd Hazwan Hussin
- School of Chemical Sciences, Universiti Sains Malaysia, Gelugor 11800, Pulau Pinang, Malaysia;
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23
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Zhou T, Zhao M, Zhao X, Guo Y, Zhao Y. Simultaneous remediation and fertility improvement of heavy metals contaminated soil by a novel composite hydrogel synthesized from food waste. CHEMOSPHERE 2021; 275:129984. [PMID: 33984900 DOI: 10.1016/j.chemosphere.2021.129984] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 02/08/2021] [Accepted: 02/11/2021] [Indexed: 05/24/2023]
Abstract
Soil contamination by heavy metals constitutes a serious global environmental problem, and numerous remediation technologies have been developed. In this study, a novel soil remediation agent, namely composite hydrogel (leftover rice-g-poly(acrylic acid)/montmorillonite/Urea, LR-g-PAA/MMT/urea), was prepared based on free radical polymerization cross-linking technology. Experimental results indicated that the LR-g-PAA/MMT/urea dosage increased from 0% to 10%, the oxidizable state proportions of Cd, Cu, Pb and Zn in contaminated soil increased from 8.3%, 23.7%, 54.0% and 11.4%-71.3%, 61.0%, 76.5%, and 27.9%, respectively. Compared with control experiment, the residue state growth rate were 56.6%, 23.4% and 39.8% for Cu, Pb and Zn respectively with 10% dosage of composite hydrogel. Simultaneously, the LR-g-PAA/MMT/urea was also seen to enhance soil fertility, including organic matter content, cation exchange capacity, and N and P contents. Pot experiments for biological toxicity suggested that the addition of hydrogel weakened the toxic effect of heavy metals on cotton seeds, and the action effect was increasingly visible with the increase of hydrogel dosage. The analysis of the mechanism involved suggested that the organic matter and its possessed characteristic functional groups could weaken the biological toxicity via complexation, adsorption, and ion exchange. Overall, the synthesized composite hydrogel exhibits great potential for the simultaneous remediation and fertility improvement of heavy metal contaminated soil.
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Affiliation(s)
- Tao Zhou
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai, 200092, PR China.
| | - Minhui Zhao
- School of Chemical Biology and Environment, Yuxi Normal University, Yuxi 563100, China
| | - Xin Zhao
- Shanghai National Engineering Research Center of Urban Water Resources Co.,Ltd, Shanghai, 200082, China
| | - Yanyan Guo
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Youcai Zhao
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai, 200092, PR China.
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24
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Xu Y, Geng H, Chen R, Liu R, Dai X. Enhancing methanogenic fermentation of waste activated sludge via isoelectric-point pretreatment: Insights from interfacial thermodynamics, electron transfer and microbial community. WATER RESEARCH 2021; 197:117072. [PMID: 33784610 DOI: 10.1016/j.watres.2021.117072] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 05/21/2023]
Abstract
The usefulness of waste activated sludge (WAS) as an energy source is limited by the poor generation efficiency of methane from WAS, which is mainly due to the complex nature of sludge and low abundance of functional microbes. In this study, the interfacial thermodynamics, electron transfer and microbial community of sludge were investigated to reveal the enhancing effects of isoelectric-point (pI) pretreatment on the efficiency of methane generation from WAS. Experimentally, after pI pretreatment, the methane production potential, maximum methane production rate and maximum methane proportion in the biogas increased by 122.2%, 154.4% and 17.4%, respectively, indicating that pI pretreatment enhanced the generation efficiency of methane. Analyses of changes in the solid-liquid interfacial non-covalent interaction energy, electron transfer capacity (ETC) and reductive peak potential values of sludge samples with and without pI pretreatment during a 170-day methanogenic fermentation period revealed that pI pretreatment enhanced the self-driven solid-liquid interfacial hydrophobic attractions of sludge, increased the abiotic driving forces of interfacial enzymatic reactions, promoted the electron transfer efficiency and lowered the barrier of the reduction reaction. It was thus hypothesised that these changes would be responsible for increasing methane production, which was confirmed by the correlation analyses between the interfacial free energy (IFE) and ETC versus daily methane production. Moreover, statistical analyses of the differences between the microbial communities of sludge samples with and without pI pretreatment during fermentation demonstrated that pI pretreatment significantly (P < 0.05) improved the relative abundances of the main functional microbes with respect to hydrolysis, acidification and methanation. A further investigation of the relationships of IFE and ETC with the relative abundances of the main genera of methanogens indicated that the hydrophobic attraction of sludge surface and a high ETC are conducive to the enrichment of hydrogenotrophic methanogens (+29.9%). These findings are expected to provide a conceptual framework for developing second-generation pretreatment methods and provide a methodological reference for revealing the details of the 'black-box' anaerobic digestion process.
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Affiliation(s)
- Ying Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Hui Geng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Renjie Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Rui Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
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25
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Ma L, Chen N, Feng C. Performance and enhancement mechanism of corncob guiding chromium (VI) bioreduction. WATER RESEARCH 2021; 197:117057. [PMID: 33780734 DOI: 10.1016/j.watres.2021.117057] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 02/23/2021] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
Chromium-contaminated groundwater has drawn extensive attention due to its high toxicity and wide application. Although bioremediation is considered to be an effective approach for Cr(VI) removal, a better method is still urgently needed. In this study, corncob-guided Cr(VI) reduction achieved the highest removal efficiency due to the highest amount of total carbon and available carbon emissions. After verifying the sustainability and operational feasibility of this approach, the broad-spectrum applicability of corncob to guide Cr(VI) bioreduction was further explored under various operating conditions. In addition, it suggested that the carrier effect, nutrient element release and electron shuttle effect were the main mechanisms enhancing the reduction process, with approximate contribution rates of 12.5%, 7.5% and 75%, respectively. Microbiological analysis demonstrated that the addition of solid-phase carbon sources increased the abundance of microbes related to carbon metabolism and promoted the expression of glycolytic metabolic pathway. Furthermore, the addition of corncob led to an elevation of expression level of the electron transport pathway, which is consistent with the function of the electron shuttle. This study provides theoretical and technical support for the practical application of corncob-mediated Cr(VI) bioreduction.
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Affiliation(s)
- Linlin Ma
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Nan Chen
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China.
| | - Chuanping Feng
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
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26
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Hu Y, Lu Y, Edmonds J, Liu C, Zhang Q, Zheng C. Irrigation alters source-composition characteristics of groundwater dissolved organic matter in a large arid river basin, Northwestern China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 767:144372. [PMID: 33434831 DOI: 10.1016/j.scitotenv.2020.144372] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/15/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
It has been well documented that agricultural activities lead to significant alterations in surface water dissolved organic matter (DOM), yet their impacts on groundwater DOM remain poorly constrained. The quantity, source, and composition of DOM play a pivotal role in a range of groundwater ecosystem services that are of important ecological and societal values. We assessed the impact of irrigation on the source and compositional characteristics of groundwater DOM in a large river basin supporting intensive agriculture in arid northwestern China. We sampled five water types along a river reach of approximately 40 km, including groundwater, river water, irrigation canal water, hyporheic water, and soil leachates. The excitation-emission matrix (EEM) measurements coupled with parallel factor analysis (PARAFAC) identified two terrestrial-derived, humic-like fluorescent components (C1 and C2) and one protein-like autochthonous component (C3). DOM composition and dissolved organic carbon (DOC) concentration varied as a function of water type, with subsurface waters showing relatively lower DOC and terrestrial humic fluorescence than surface waters. Combining nitrate, electrical conductivity, dissolved inorganic carbon (DIC), and δ13C-DIC, irrigation-influenced samples were identified, and the influence of irrigation on groundwater DOM appeared only in shallow aquifers (<50 m). Irrigation-influenced groundwater exhibited higher DOC and terrestrial fluorescence than unimpacted groundwater, suggesting that irrigation return flows accelerated the downward movement of terrestrial humic compounds and led to their accumulation in aquifers. This effect was propagated via surface water-groundwater interactions to upwelling hyporheic water, which also showed enrichment in terrestrial fluorescence. Our findings demonstrate that irrigation can accelerate the biogeochemical cycling of organic compounds via a subsurface pathway of from the soil to aquifer to hyporheic zone. The enrichment of soil-derived compounds in subsurface waters may have important ecological consequences, such as altering the transport of nutrients and pollutants and changing carbon and energy flows across the surface-subsurface boundary.
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Affiliation(s)
- Yue Hu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), Chengdu 610059, China
| | - YueHan Lu
- Molecular Eco-Geochemistry Laboratory, Department of Geological Sciences, University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Jennifer Edmonds
- Physical and Life Sciences, Nevada State College, Henderson, NV 89002, USA
| | - Chuankun Liu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), Chengdu 610059, China
| | - Qiang Zhang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), Chengdu 610059, China
| | - Chunmiao Zheng
- School of Environmental Science and Engineering, South University of Science and Technology of China, Shenzhen, China; Institute of Water Sciences, Peking University, Beijing 100871, China
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27
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Rodríguez Sartori D, Bertuola M, Miñán A, Gonik E, Gonzalez MC, Fernández Lorenzo de Mele M. Environmentally Induced Changes of Commercial Carbon Nanotubes in Aqueous Suspensions. Adaptive Behavior of Bacteria in Biofilms. ACS OMEGA 2021; 6:5197-5208. [PMID: 33681561 PMCID: PMC7931186 DOI: 10.1021/acsomega.0c05114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/31/2020] [Indexed: 06/12/2023]
Abstract
The effects of environmental factors such as sunlight irradiation and the presence of humic acid (HA) on the physicochemical properties of commercial multiwall carbon nanotubes (MWCNT) suspended in a simulated inorganic matrix (SIM) and their impacts on bacteria growing in biofilms were evaluated. Both solar irradiation and the presence of HA lead to the dissolution of adsorbed metals on the MWCNT, which are residues of synthesis catalysts. Also, preferential adsorption of certain HA components on the MWCNT induces important modifications in the aliphatic/aromatic relationship of HA components in solution and the generation and release of new moieties. Results demonstrated that the variation of such physicochemical parameters strongly affects the interactions of MWCNT with Pseudomonas aeruginosa sessile bacteria. Thus, the number of attached bacteria increased, and stress responses such as decrease in bacterial size were found in the presence of sunlight-irradiated MWCNT with a particular distribution of extracellular polymeric substances (EPS) strands. A shielding effect was observed when HA was added. It was concluded that physicochemical alterations caused by environmental conditions (with/without irradiation, presence/absence of HA) on MWCNT-containing SIM trigger distinctive adaptive behavior of bacteria in biofilms. This information must be taken into account in the development of biologically assisted treatments for organic metal co-contamination of MWCNT-containing media since MWCNT discharge alters the physicochemical properties and composition of the aqueous environment and the response of the biofilms that interact with it.
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Affiliation(s)
- Damián Rodríguez Sartori
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Marcos Bertuola
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Alejandro Miñán
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Eduardo Gonik
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Mónica C. Gonzalez
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Mónica Fernández Lorenzo de Mele
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
- Facultad
de Ingeniería, UNLP, B1900 La Plata, Argentina
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28
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Gautam MK, Lee KS, Berg B, Song BY. Major, trace and rare earth elements dynamics in decomposing litters on successional sites in a cool temperate region of South Korea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 749:142352. [PMID: 33370907 DOI: 10.1016/j.scitotenv.2020.142352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/09/2020] [Accepted: 09/09/2020] [Indexed: 06/12/2023]
Abstract
Evaluating the decomposition-based change dynamics of various elements in plant litter is important for improving our understanding about their biogeochemical cycling in ecosystems. We have studied the concentrations of major, trace, and rare earth elements (REEs) (34 elements) in green tissue litter, and soil and their dynamics in the decomposing litters of successional annual fleabane (Erigeron annuus) and silvergrass (Miscanthus sinensis). Concentrations of major and trace elements in the litter of annual fleabane were 1.02-2.71 times higher compared to silvergrass. For REEs the difference between the two litter types for elements studied was in the range of 1.02-1.29 times. Both the litters showed a general decrease in the concentrations of elements in the initial stages of decomposition (60-90 days). All the major and trace elements (except for Na) in silvergrass showed a net increase in concentration at the end of the decomposition study (48.9-52.5% accumulated mass loss). Contrastingly, a few trace elements (Mn, Mo, Sr, Zn, Sb, and Cd) in annual fleabane showed a net decrease in their concentrations. For REEs, there was an increase in concentrations as well as in net amounts in both litter types. Similarities observed in the dynamics together with high and significant correlations among them likely suggest their common source. The higher concentrations of REEs in soil likely suggest its role in the net increase in REEs' concentrations and amount in litter during decomposition.
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Affiliation(s)
- Mukesh Kumar Gautam
- Division of Earth and Environmental Sciences, Korea Basic Science Institute, Ochang, Chungbuk 28119, Republic of Korea; Biology Department, Medgar Evers College, City University of New York, New York, NY 11225, USA.
| | - Kwang-Sik Lee
- Division of Earth and Environmental Sciences, Korea Basic Science Institute, Ochang, Chungbuk 28119, Republic of Korea.
| | - Björn Berg
- Section of Biology, University of Gävle, SE-801 76 Gävle, Sweden; Department of Forest Sciences, University of Helsinki, FIN-00014 Helsinki, Finland
| | - Byeong-Yeol Song
- Division of Earth and Environmental Sciences, Korea Basic Science Institute, Ochang, Chungbuk 28119, Republic of Korea; Chemical Analysis Division, National Forensic Service, Wonju 26460, Republic of Korea
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Zhang Y, Zhang Z, Liu W, Chen Y. New applications of quinone redox mediators: Modifying nature-derived materials for anaerobic biotransformation process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 744:140652. [PMID: 32693271 DOI: 10.1016/j.scitotenv.2020.140652] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/29/2020] [Accepted: 06/29/2020] [Indexed: 06/11/2023]
Abstract
Due to their wide-distribution, high-biocompatibility and low-cost, nature-derived quinone redox mediators (NDQRM) have shown great potential in bioremediation through mediating electron transfers between microorganisms and between microorganisms and contaminants in anaerobic biotransformation processes. It is obvious that their performance in bioremediation was limited by the availability of quinone-based groups in NDQRM. A sustainable solution is to enhance the electron transfer capacity and retention capacity by the modification of NDQRM. Therefore, this review comprehensively summarized the modification techniques of NDQRM according to their multiple roles in anaerobic biotransformation systems. In addition, their potential applications in greenhouse gas mitigation, contaminant degradation in anaerobic digestion, contaminant bioelectrochemical remediation and energy recovery were discussed. And the problems that need to be addressed in the future were pointed out. The obtained knowledge would promote the exploration of novel NDQRM, and provide suggestions for the design of anaerobic consortia in biotransformation systems.
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Affiliation(s)
- Yu Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Zhengzhe Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Weiguo Liu
- College of Resources and Environment Science, Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi 830046, China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
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30
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Fizer M, Sidey V, Milyovich S, Fizer O. A DFT study of fulvic acid binding with bivalent metals: Cd, Cu, Mg, Ni, Pb, Zn. J Mol Graph Model 2020; 102:107800. [PMID: 33197854 DOI: 10.1016/j.jmgm.2020.107800] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/16/2020] [Accepted: 11/03/2020] [Indexed: 11/30/2022]
Abstract
3,7,8-Trihydroxy-3-methyl-10-oxo-4,10-dihydro-1H,3H-pyrano [4,3-b]chromene-9-carboxylic acid is a structurally well-characterized fulvic acid (FA) capable to act as a polyfunctional bidentate ligand in the complexes with metal ions. Investigations of the formation mechanisms and structure of the above-mentioned FA complexes with bivalent metals [Cd(II), Cu(II), Mg(II), Ni(II), Pb(II) and Zn(II)] are presently an actual and trending topic in the modern chemistry of humic and fulvic acids. Furthermore, the importance of the theoretical DFT investigations of binding of metals with fulvic acids is stipulated by the lack of the relevant experimental structural data for such complexes. The quantum chemical calculations have shown that, of the four possible FA tautomers, the two FA forms are more stable. The wavefunction analysis and computed reactivity descriptors (electrostatic potential, Hirshfeld surface analysis, natural population analysis charges, and condensed Fukui indexes) give the insight on the properties and reactive ability of these two different forms of the FA. The computed thermochemical parameters of the ion-exchange reaction explain the metal binding affinity and selectivity of the FA forms.
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Affiliation(s)
- Maksym Fizer
- Faculty of Chemistry, Uzhhorod National University, Pidhirna Str., 46, 88000, Uzhhorod, Ukraine.
| | - Vasyl Sidey
- Research Institute for Physics and Chemistry of Solid State, Uzhhorod National University, Pidhirna Str., 46, 88000, Uzhhorod, Ukraine
| | - Stepan Milyovich
- Faculty of Chemistry, Uzhhorod National University, Pidhirna Str., 46, 88000, Uzhhorod, Ukraine
| | - Oksana Fizer
- Faculty of Chemistry, Uzhhorod National University, Pidhirna Str., 46, 88000, Uzhhorod, Ukraine
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Gowri M, Latha N, Suganya K, Kumar SK, Alahmadi TA, Alharbi SA, Murugan M, Rajan M. Amoxicillin loaded Nickel functionalized polymeric bentonite carrier for enhanced therapeutic activity. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02340-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Vašková J, Vaško L, Mudroň P, Haus M, Žatko D, Krempaská K, Stupák M. Effect of humic acids on lead poisoning in bones and on a subcellular level in mitochondria. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:40679-40689. [PMID: 32671699 DOI: 10.1007/s11356-020-10075-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Humic acids (HA) are natural substances which exhibit a remarkable spectrum of health benefits, such as their role in chelation. This study aims to supplement the current knowledge on the chelating effects of HA in chronic lead intoxication in rat femurs and in liver, heart and kidney mitochondria in an experiment lasting 10 weeks. Lead acetate trihydrate was administered to rats for 5 weeks at a daily dose of 155.5 mg/kg body weight. At the same time, rats were given three concentrations of HA, with their effect measured over the following 5 weeks. Increased Pb concentrations were detected in the femur after the first week, while HA-administered groups showed a tendency towards inhibiting the increase in Pb deposition. After 5 weeks, Pb concentrations dropped significantly in the HA groups. At the same time, however, other elements were redistributed, with a decrease in Se and Zn being particularly noteworthy. While an increase in Pb concentrations was found after 5 weeks of Pb administration, a concentration of 1% HA resulted in the least significant increase in Pb as well as an increase/decrease in Se/Cu, respectively. In mitochondria, an increase in Pb content was detected after the first and fifth weeks with concomitant redistribution of other elements. At the end of the experiment, again in the 1% HA group, Pb concentrations remained higher only in the liver with the other elements sufficiently normalized, indicating this concentration to be useful in the treatment of Pb intoxication.
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Affiliation(s)
- Janka Vašková
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, Tr. SNP 1, 040 66, Košice, Slovak Republic.
| | - Ladislav Vaško
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, Tr. SNP 1, 040 66, Košice, Slovak Republic
| | - Pavol Mudroň
- Clinic for Ruminants, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81, Košice, Slovak Republic
| | - Martin Haus
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, Tr. SNP 1, 040 66, Košice, Slovak Republic
| | - Daniel Žatko
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, Tr. SNP 1, 040 66, Košice, Slovak Republic
| | - Klára Krempaská
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, Tr. SNP 1, 040 66, Košice, Slovak Republic
| | - Marek Stupák
- Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, Tr. SNP 1, 040 66, Košice, Slovak Republic
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Rodriguez-Avella KA, Baraer M, Mark B, McKenzie J, Somers L. Comparing the performance of three methods to assess DOM dynamics within two distinct glacierized watersheds of the tropical Andes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:115052. [PMID: 32806424 DOI: 10.1016/j.envpol.2020.115052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 06/15/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
Dissolved organic matter (DOM) is recognized as a good indicator of water quality as its concentration is influenced by land use, rainwater, windborne material and anthropogenic activities. Recent technological advances make it possible to characterize fluorescent dissolved organic matter (FDOM), the fraction of DOM that fluoresces. Among these advances, portable fluorometers and benchtop fluorescence excitation and emission spectroscopy coupled with a parallel factor analysis (EEM-PARAFAC) have shown to be reliable. Despite their rising popularity, there is still a need to evaluate the extent to which these techniques can assess DOM dynamics at the watershed scale. We compare the performance of in-situ measurements of FDOM with laboratory measurements of fluorescence spectroscopy within the context of two distinct glacierized watersheds in Peru. Glacierized watersheds represent unique testing environments with contrasting DOM conditions, flowing from pristine, vegetation-free headwaters through locations with obvious anthropogenic influences. We used an in-situ fluorometer and a portable multimeter to take 38 measurements of FDOM, pH and turbidity throughout the two catchments. Additionally, samples were analyzed in the laboratory using the EEM-PARAFAC method. Results were compared to dissolved organic carbon (DOC) measurements using standard high-temperature catalytic oxidation. Our results show that the three techniques together were able to capture the DOM dynamics for both studied watersheds. Taken individually, all three methods allowed detection of the watershed DOM main points of sources but in a more limited way. Due to the narrow bandwidth of the portable fluorometer used in the study, FDOM measurements were almost non-detectable to protein-like substances. Indeed, the more demanding EEM-PARAFAC was able to both differentiate between potential sources of DOM and provide an estimate of relative concentrations of different organic components. Finally, similar to FDOM but to a lesser extent, the DOC measurements showed some limits where protein-like substances make up most of the DOM composition.
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Affiliation(s)
- K A Rodriguez-Avella
- École de technologie supérieure, University of Quebec, 1100 Notre-Dame Street West, Montreal QC H3C 1K3, Canada.
| | - M Baraer
- École de technologie supérieure, University of Quebec, 1100 Notre-Dame Street West, Montreal QC H3C 1K3, Canada
| | - B Mark
- Department of Geography, The Ohio State University, 1036 Derby Hall, 154 North Oval Mall, Columbus, 43210-1361, United States
| | - J McKenzie
- Department of Earth and Planetary Sciences, McGill University, 3450 University Street, Montreal QC H3A 2A7, Canada
| | - L Somers
- Department of Earth and Planetary Sciences, McGill University, 3450 University Street, Montreal QC H3A 2A7, Canada
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Ferrentino R, Merzari F, Andreottola G. Optimisation of Fe 2+/H 2O 2 ratio in Fenton process to increase dewaterability and solubilisation of sludge. ENVIRONMENTAL TECHNOLOGY 2020; 41:2946-2954. [PMID: 30817238 DOI: 10.1080/09593330.2019.1589583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
Fenton is one of the advanced oxidation processes that can oxide organic compounds efficiently increasing the dewaterability of sludge. This study reports the optimisation of two reagents, Fe2+ and H2O2, involved in the Fenton process in order to increase sludge dewaterability and solubilisation, which were evaluated in terms of SRF, CST and DS. The study was divided into two sets of tests. First the optimal ratio Fe2+/H2O2 was set varying from 0.5-2.0. Results showed that the best Fe2+/H2O2 was equal to 0.8 corresponding to 2.1 s of CST, 2.1·1013 m kg-1 of SRF and 3.1% of DS. In the second set of tests, the Fe2+/H2O2 ratio was maintained fixed to 0.8 while the concentration of reagents was decreased up to 98% in order to verify the efficiency of the process. Results showed that performing Fenton process with a concentration of H2O2 and Fe2+ of, respectively, 6000 and 5000 mg L-1 the SRF and CST could be reduced up to 88% and 76%, respectively, and a DS equal to 3.1% could be obtained. A reduction in the Fenton reagents down to 300 and 250 mg L-1, respectively, for H2O2 and Fe2+ showed a little decrease in efficiency of the process. However, the Fenton process could be still performed thus obtaining an economic saving.
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Affiliation(s)
- Roberta Ferrentino
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
| | - Fabio Merzari
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
| | - Gianni Andreottola
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
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Pan C, Chen K, Chen D. Effect of Organics on Heavy Metal-Contaminated River Sediment Treated with Electro-Osmosis and Solidification/Stabilization Methods. MATERIALS 2020; 13:ma13061466. [PMID: 32210200 PMCID: PMC7143773 DOI: 10.3390/ma13061466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/15/2020] [Accepted: 03/16/2020] [Indexed: 11/24/2022]
Abstract
This study focuses on the treatment of heavy metal ions and achieving enhancement of river sediment, which is rich in organics. Fulvic acid was used as the main representative of organics in which to study the transfer of Cu2+, Zn2+ ions in the electroosmotic system, in both the absence and presence of organics. In addition, the effects of the experiment parameters (i.e., voltages, displacement, and water content), heavy metal ion content (0.19% and 0.38%, respectively), and the concentration of organics (1.5%, 3%, and 4.5%) acting on migration of ions and physiochemical properties of sediment, before and after electro-osmosis treatment were investigated. Mineral composition of the soil and its microscopic characteristics were analyzed by scanning electron microscopy. The results show that the 4.5% fulvic acid added in the sediment can enhance the migration ability of Cu2+ and Zn2+ ions through complexation, and simultaneously effectively reduce the formation of colloids with the average reductions of Cu2+ ions and Zn2+ ions being 28 and 11 mg/kg, respectively. While the dewatering capacity of the sediment with higher fulvic acid content is weaker, fulvic acid can effectively reduce the corrosion of the electrode during the electro-osmosis process, due to the film formed on the metal surface. Moreover, the fulvic acid in the organics can be combined with the aluminum and calcium produced by the hydration of the cement, delaying the hydration of the cement, while simultaneously decomposing the hydration product and hindering the hardening of the cement, thereby affecting and destroying the formation of the sediment’s structure and its strength.
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Affiliation(s)
- Chonggen Pan
- Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
- Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
- Correspondence:
| | - Keyu Chen
- School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 300018, China;
| | - Danting Chen
- Civil Environmental and Geomatic Engineering, University of College London, London WC1E 6BT, UK;
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Zhao Y, Cao B, Lin Z, Su X. Synthesis of CoFe 2O 4/C nano-catalyst with excellent performance by molten salt method and its application in 4-nitrophenol reduction. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 254:112961. [PMID: 31398635 DOI: 10.1016/j.envpol.2019.112961] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 07/24/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
CoFe2O4/C nano-sheets (NSs) have been synthesized by a facile molten salt method using cheap potassium fulvate as carbon source and sodium chloride as template. The morphology, crystallinity and composition of the materials were analyzed by TEM, XRD and XPS. The study on the catalytic performance of 4-nitrophenol (4-NP) shows that CoFe2O4/C-600 nano-catalyst has the highest catalytic activity and the corresponding apparent constant is 1.91 min-1, this result is higher than that reported in most literatures. Catalytic kinetics of 4-NP reduction was studied in this article, and activation energy (Ea) was calculated to be 14.31 kJ mol-1. The catalyst also shows good cycle performance and stability. This convenient method provides a reference for the synthesis of MFe2O4/C and other nano-metal oxides/C nanocomposite catalysts.
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Affiliation(s)
- Yunlong Zhao
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Ministry Key Laboratory of Oil and Gas Fine Chemicals College of Chemistry and Chemical Engineering, Xinjiang University Urumqi, 830046, China
| | - Baoyong Cao
- Ministry Key Laboratory of Oil and Gas Fine Chemicals College of Chemistry and Chemical Engineering, Xinjiang University Urumqi, 830046, China
| | - Zhang Lin
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xintai Su
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
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37
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Qin S, Yu L, Yang Z, Li M, Clough T, Wrage-Mönnig N, Hu C, Liu B, Chen S, Zhou S. Electrodes Donate Electrons for Nitrate Reduction in a Soil Matrix via DNRA and Denitrification. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:2002-2012. [PMID: 30676746 DOI: 10.1021/acs.est.8b03606] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Microbial strains and indigenous microbiota in soil slurries have been reported to use electrons from electrodes for nitrate (NO3-) reduction. However, few studies have confirmed this in a soil matrix hitherto. This study investigated if, and how, an electric potential affected NO3- reduction in a soil matrix. The results showed that, compared to a control treatment, applying an electric potential of -0.5 V versus the standard hydrogen electrode (SHE) significantly increased the relative abundance of NO3--reducing microbes (e.g., Alcaligenaceae and Pseudomonadaceae) and the abundances of the nrfA, nirK, nirS, and nosZ genes in soil matrices. Meanwhile, the electric potential treatment doubled the NO3- reduction rate and significantly increased the rates of production of ammonium (NH4+), dinitrogen (N2), and nitrous oxide (N2O). The amount of NO3--N reduced under the electric potential treatment was comparable to the sum of the amounts of N observed in the increased N2O, N2, NH4+, and nitrite (NO2-) pools. An open-air experiment showed that the electric potential treatment promoted soil NO3- reduction with a spatial scale of at least 38 cm. These results demonstrated that an electric potential treatment could enhance NO3- reduction via both denitrification and dissimilatory NO3- reduction to ammonium (DNRA) in the soil matrix. The mechanisms revealed in this study have implications for the future development of potential techniques for enhancing NO3- reduction in the vadose zone and consequently reducing the risk of NO3- leaching.
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Affiliation(s)
- Shuping Qin
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resource and Environmental Science , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , China
| | - Linpeng Yu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resource and Environmental Science , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , China
| | - Zujie Yang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resource and Environmental Science , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , China
| | - Mengya Li
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resource and Environmental Science , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , China
| | - Tim Clough
- Faculty of Agriculture & Life Science , Lincoln University , Lincoln 7647 , New Zealand
| | - Nicole Wrage-Mönnig
- Faculty of Agriculture and the Environment, Grassland and Fodder Sciences , University of Rostock , 18055 Rostock , Germany
| | - Chunsheng Hu
- Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology , The Chinese Academy of Sciences , 286 Huaizhong Road , Shijiazhuang , Hebei 050021 , China
| | - Binbin Liu
- Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology , The Chinese Academy of Sciences , 286 Huaizhong Road , Shijiazhuang , Hebei 050021 , China
| | - Shuaimin Chen
- Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology , The Chinese Academy of Sciences , 286 Huaizhong Road , Shijiazhuang , Hebei 050021 , China
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resource and Environmental Science , Fujian Agriculture and Forestry University , Fuzhou , Fujian 350002 , China
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Li D, Xi B, Li Y, Wang X, Yang T, Yu H, Huang C, Zhu J, Li Q, Peng X, Ma Z. The effect of redox capacity of humic acids on hexachlorobenzene dechlorination during the anaerobic digestion process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:6099-6106. [PMID: 30617881 DOI: 10.1007/s11356-018-4056-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
Abstract
Hexachlorobenzene (HCB) dechlorination affected by humic acids (HA) was evaluated in terms of HA redox capacity, HA concentrations, and microbial community, as well as the correlation between HA redox capacity values and HCB concentrations. With addition of HA in the initial stage, redox capacity values increased by 2.19 meq/L (80 mg/L of HA addition, HA80), 2.51 meq/L (120 mg/L of HA addition, HA120), and 3.64 meq/L (200 mg/L of HA addition, HA200), respectively. The addition of HA could prominently enhance the HCB degradation rate. However, the concentration and the redox capacity of HA decreased during the anaerobic digestion process. Illumina MiSeq sequencing showed that microbial community affected by HA. Bacillus, Comamonas, and Pseudomonas were the predominant genera during the HCB dechlorination treatment. Moreover, Bacillus and Pseudomonas can improve HA electron transfer capability and promote the dechlorination of HCB.
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Affiliation(s)
- Dongyang Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Beidou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Yingjun Li
- Beijing Vocational Agriculture, Beijing, 100012, People's Republic of China
| | - Xiaowei Wang
- Energy Saving & Environmental Protection & Occupational Safety and Health Research, China Academy of Railway Sciences, Beijing, 100081, People's Republic of China
| | - Tianxue Yang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China.
| | - Hong Yu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Caihong Huang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Jianchao Zhu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Qi Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Xing Peng
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
| | - Zhifei Ma
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China
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Deka J, Saha K, Konch TJ, Gogoi RK, Saikia S, Saikia PP, Dutta GK, Raidongia K. Reconstruction of Soil Components into Multifunctional Freestanding Membranes. ACS OMEGA 2019; 4:1292-1299. [PMID: 31459400 PMCID: PMC6648056 DOI: 10.1021/acsomega.8b03144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 01/03/2019] [Indexed: 06/01/2023]
Abstract
Multifunctional freestanding membranes are prepared by tuning the structure of ubiquitous soil components, viz. clay and humic acids. Cross-linking of exfoliated clay layers with purified humic acids not only conferred mechanical strength but also enhanced chemical robustness of the membranes. The percolated network of molecularly sized channels of the soil membranes exhibits characteristic nanofluidic phenomena. Electrical conductivity is induced to otherwise insulating soil membranes by heating in an inert atmosphere, without affecting their nanofluidic ionic conductivity. The soil membranes also provided a new platform to prepare and study mixed conducting materials. Strips of heated membranes are shown to exhibit excellent sensitivity toward NH3 gas under atmospheric conditions.
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Affiliation(s)
- Jumi Deka
- Department
of Chemistry, Indian Institute of Technology
Guwahati, Guwahati, 781039 Assam, India
| | - Kundan Saha
- Department
of Chemistry, Indian Institute of Technology
Guwahati, Guwahati, 781039 Assam, India
| | - Tukhar Jyoti Konch
- Department
of Chemistry, Indian Institute of Technology
Guwahati, Guwahati, 781039 Assam, India
| | - Raj Kumar Gogoi
- Department
of Chemistry, Indian Institute of Technology
Guwahati, Guwahati, 781039 Assam, India
| | - Subhasmita Saikia
- Department
of Chemistry, Indian Institute of Technology
Guwahati, Guwahati, 781039 Assam, India
| | | | - Gitish K. Dutta
- Department
of Chemistry, National Institute of Technology
Meghalaya, 793003 Shillong, Meghalaya, India
| | - Kalyan Raidongia
- Department
of Chemistry, Indian Institute of Technology
Guwahati, Guwahati, 781039 Assam, India
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40
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Sihn Y, Bae S, Lee W. Immobilization of uranium(VI) in a cementitious matrix with nanoscale zerovalent iron (NZVI). CHEMOSPHERE 2019; 215:626-633. [PMID: 30347357 DOI: 10.1016/j.chemosphere.2018.10.073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 09/29/2018] [Accepted: 10/12/2018] [Indexed: 06/08/2023]
Abstract
We developed a novel solidification and stabilization process using a nanoscale zerovalent iron (NZVI)-cement system for reductive immobilization of hexavalent uranium (U(VI)) in a soil-cement matrix. The NZVI suspension without cement demonstrated high removal efficiency (100% in 2 h) and fast removal kinetics (53.7 Lm-2d-1), which surpassed those of other Fe-containing minerals (i.e., green rust, mackinawite, magnetite, and pyrite). Significant removal of aqueous U(VI) was observed in NZVI-cement slurries and minimal adsorbed U was desorbed by a bicarbonate/carbonate (CARB) solution. Surface analysis using scanning electron microscopy and X-ray photoelectron spectroscopy revealed U distributed homogeneously on the surface of the NZVI-cement and transformed considerably from U(VI) to reduced U species by coupled oxidation of Fe(0)/Fe(II) to Fe(III). Furthermore, the increase in pH and NZVI concentration, and presence of humic acid resulted in the enhanced U(VI) reduction in NZVI-cement slurries. The NZVI-cement system was tested with a soil matrix, resulting in successful immobilization of aqueous U(VI) in both batch and column experiments. Moreover, the U(VI) removed in the NZVI-cement system was not leached out by the CARB solution during long-term experiments. The results suggest an NZVI-cement system could represent a promising remediation alternative for effective and stable immobilization of U(VI) in contaminated sites.
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Affiliation(s)
- Youngho Sihn
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sungjun Bae
- Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Woojin Lee
- Department of Civil and Environmental Engineering & Green Environment and Energy Lab., National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan.
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Microbial electrocatalysis: Redox mediators responsible for extracellular electron transfer. Biotechnol Adv 2018; 36:1815-1827. [PMID: 30196813 DOI: 10.1016/j.biotechadv.2018.07.001] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 07/03/2018] [Accepted: 07/05/2018] [Indexed: 11/21/2022]
Abstract
Redox mediator plays an important role in extracellular electron transfer (EET) in many environments wherein microbial electrocatalysis occurs actively. Because of the block of cell envelope and the low difference of redox potential between the intracellular and extracellular surroundings, the proceeding of EET depends mainly on the help of a variety of mediators that function as an electron carrier or bridge. In this Review, we will summarize a wide range of redox mediators and further discuss their functional mechanisms in EET that drives a series of microbial electrocatalytic reactions. Studying these mediators adds to our knowledge of how charge transport and electrochemical reactions occur at the microorganism-electrode interface. This understanding would promote the widespread applications of microbial electrocatalysis in microbial fuel cells, bioremediation, bioelectrosynthesis, biomining, nanomaterial productions, etc. These improved applications will greatly benefit the sustainable development of the environmental-friendly biochemical industries.
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Alivio TEG, Fleer NA, Singh J, Nadadur G, Feng M, Banerjee S, Sharma VK. Stabilization of Ag-Au Bimetallic Nanocrystals in Aquatic Environments Mediated by Dissolved Organic Matter: A Mechanistic Perspective. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7269-7278. [PMID: 29864275 DOI: 10.1021/acs.est.8b01003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Gold and silver nanoparticles can be stabilized endogenously within aquatic environments from dissolved ionic species as a result of mineralization induced by dissolved organic matter. However, the ability of fulvic and humic acids to stabilize bimetallic nanoparticles is entirely unexplored. Elucidating the formation of such particles is imperative given their potential ecological toxicity. Herein, we demonstrate the nucleation, growth, and stabilization of bimetallic Ag-Au nanocrystals from the interactions of Ag+ and Au3+ with Suwannee River fulvic and humic acids. The mechanisms underpinning the stabilization of Ag-Au alloy NPs at different pH (6.0-9.0) values are studied by UV-vis spectrophotometry, X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM), and selected area electron diffraction (SAED). Complexation of free Ag+ and Au3+ ions with the Lewis basic groups (carbonyls, carboxyls, and thiols) of FA and HA, followed by electron-transfer from redox-active moieties present in dissolved organic matter initiates the nucleation of the NPs. Alloy formation and interdiffusion of Au and Ag atoms are further facilitated by a galvanic replacement reaction between AuCl4- and Ag. Charge-transfer from Au to Ag stabilizes the formed bimetallic NPs. A more pronounced agglomeration of the Ag-Au NPs is observed when HA is used compared to FA as the reducing agent. The bimetallic NPs are stable for greater than four months, which suggests the possible persistence and dispersion of these materials in aquatic environments. The mechanistic ideas have broad generalizability to reductive mineralization processes mediated by dissolved organic matter.
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Affiliation(s)
- Theodore E G Alivio
- Department of Chemistry , Texas A&M University , College Station , Texas 77842-3012 , United States
- Department of Materials Science and Engineering , Texas A&M University , College Station , Texas 77843-3003 , United States
| | - Nathan A Fleer
- Department of Chemistry , Texas A&M University , College Station , Texas 77842-3012 , United States
- Department of Materials Science and Engineering , Texas A&M University , College Station , Texas 77843-3003 , United States
| | - Jashanpreet Singh
- Department of Environmental and Occupational Health, School of Public Health , Texas A&M University , College Station , Texas 77843-8371 , United States
| | - Govind Nadadur
- Department of Environmental and Occupational Health, School of Public Health , Texas A&M University , College Station , Texas 77843-8371 , United States
| | - Mingbao Feng
- Department of Environmental and Occupational Health, School of Public Health , Texas A&M University , College Station , Texas 77843-8371 , United States
| | - Sarbajit Banerjee
- Department of Chemistry , Texas A&M University , College Station , Texas 77842-3012 , United States
- Department of Materials Science and Engineering , Texas A&M University , College Station , Texas 77843-3003 , United States
| | - Virender K Sharma
- Department of Environmental and Occupational Health, School of Public Health , Texas A&M University , College Station , Texas 77843-8371 , United States
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Cuprys A, Pulicharla R, Lecka J, Brar SK, Drogui P, Surampalli RY. Ciprofloxacin-metal complexes -stability and toxicity tests in the presence of humic substances. CHEMOSPHERE 2018; 202:549-559. [PMID: 29587236 DOI: 10.1016/j.chemosphere.2018.03.117] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/15/2018] [Accepted: 03/17/2018] [Indexed: 06/08/2023]
Abstract
The co-contamination of ciprofloxacin (CIP) with metal ions results in alteration of CIP mobility, antimicrobial activity and distribution/development of the antibiotic-resistance genes. In this study, the stability of five CIP-Me complexes [Me = Al(III), Co(II), Cu(II), Fe(III), Mg] was investigated in the presence of humic substances (HS) at two temperatures 18 ± 2 °C and 4 ± 1 °C for seven days period. The most stable complexes were CIP-Al, CIP-Cu, and CIP-Co with the stability constants (K) at 18 °C 35.5 ± 1.4 11.5 ± 1.5 and 11.7 ± 1.5 respectively. At lower temperature (4 °C), the stability constants decreased: 1-fold for CIP-Al, 14-fold for CIP-Co and 2-fold for CIP-Cu. The presence of humic substances decreased the stability of complexes. The chemical reactions of Fe3+ in water at circumneutral pH resulted in stability alteration. The formation of CIP-Mg complexes at lower temperatures and in the presence of HS was limited. In ultrapure water, CIP-Me complexes exhibit higher toxicity towards Gram-negative Enterobacter aeruginosa (ranged between 0.125 and 0.5 μg/ml). However, the presence of HS reduced the antimicrobial activity of CIP-Me complexes by at least 2-fold. Gram-positive representative, Bacillus subtilis was not affected by the presence of metal ions and/or HS. The toxicity toward B. subtilis for the complexes was equal to toxicity of CIP alone (MIC = 0.25 μg/ml). This suggested the different susceptibility to CIP and its complexes.
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Affiliation(s)
- Agnieszka Cuprys
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - Rama Pulicharla
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - Joanna Lecka
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - Satinder Kaur Brar
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada.
| | - Patrick Drogui
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec G1K 9A9, Canada
| | - R Y Surampalli
- Global Institute for Energy, Environment and Sustainability, P.O. Box 14354, Lenexa, KS 66285, USA
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Pereira LS, de Araújo RP, de Oliveira PS, da Silva LD, Alves PAC, Fernandes VF, Gross E. Cadmium induced changes in Solidago chilensis Meyen (Asteraceae) grown on organically fertilized soil with reference to mycorrhizae, metabolism, anatomy and ultrastructure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 150:76-85. [PMID: 29268118 DOI: 10.1016/j.ecoenv.2017.12.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 12/01/2017] [Accepted: 12/09/2017] [Indexed: 06/07/2023]
Abstract
Solidago chilensis Meyen (Asteraceae) is a medicinal important plant with few studies on nutrition and metabolism and none information on cadmium phytotoxicity. The objective of this study was to investigate Cd induced responses on the growth and metabolism in S. chilensis and on arbuscular mycorrhiza (AM). The experiment was carried out in a greenhouse, consisting of a 5 × 4 factorial with five doses of manure (0, 3.5, 7, 14 and 21gdm-3) and four doses of cadmium (0, 25, 50 and 75mgdm-3) applied to a Dystrophic Ultisol. After 250 days of plant cultivation, biomass, nutrient content, photosynthetic rate, guaiacol peroxidase activity, mycorrhizal colonization, glomalin content, anatomical and ultrastucture were evaluated. Plants were significantly affected by interaction of manure and Cd doses with anatomical, ultrastructural, physiological and nutritional modifications. Manure applied into Cd contaminated soil significantly improved mycorrhizal colonization and glomalin production. The highest organic manure dose (21gdm-3) alleviated toxicity symptoms of Cd on S. chilensis.
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Affiliation(s)
- Lidiane Silva Pereira
- Programa de Pós-Graduação em Biologia e Biotecnologia de Microorganismos, Universidade Estadual de Santa Cruz, Ilheus, Bahia, Brazil.
| | - Romária Pereira de Araújo
- Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Estadual de Santa Cruz, Ilheus, Bahia, Brazil.
| | - Priscila Souza de Oliveira
- Programa de Pós-Graduação em Produção Vegetal, Universidade Estadual de Santa Cruz, Ilheus, Bahia, Brazil.
| | - Leandro Dias da Silva
- Programa de Pós-Graduação em Produção Vegetal, Universidade Estadual de Santa Cruz, Ilheus, Bahia, Brazil.
| | - Patricia Alves Casaes Alves
- Programa de Pós-Graduação em Biologia e Biotecnologia de Microorganismos, Universidade Estadual de Santa Cruz, Ilheus, Bahia, Brazil.
| | | | - Eduardo Gross
- Departmento de Ciências Agrárias e Ambientais, Universidade Estadual de Santa Cruz, Ilheus, Bahia, Brazil.
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Rizwan M, Ali S, Adrees M, Ibrahim M, Tsang DCW, Zia-Ur-Rehman M, Zahir ZA, Rinklebe J, Tack FMG, Ok YS. A critical review on effects, tolerance mechanisms and management of cadmium in vegetables. CHEMOSPHERE 2017; 182:90-105. [PMID: 28494365 DOI: 10.1016/j.chemosphere.2017.05.013] [Citation(s) in RCA: 235] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/01/2017] [Accepted: 05/02/2017] [Indexed: 05/20/2023]
Abstract
Cadmium (Cd) accumulation in vegetables is an important environmental issue that threatens human health globally. Understanding the response of vegetables to Cd stress and applying management strategies may help to reduce the Cd uptake by vegetables. The aim of the present review is to summarize the knowledge concerning the uptake and toxic effects of Cd in vegetables and the different management strategies to combat Cd stress in vegetables. Leafy vegetables grown in Cd contaminated soils potentially accumulate higher concentrations of Cd, posing a threat to food commodities. The Cd toxicity decreases seed germination, growth, biomass and quality of vegetables. This reduces the photosynthesis, stomatal conductance and alteration in mineral nutrition. Toxicity of Cd toxicity also interferes with vegetable biochemistry causing oxidative stress and resulting in decreased antioxidant enzyme activities. Several management options have been employed for the reduction of Cd uptake and toxicity in vegetables. The exogenous application of plant growth regulators, proper mineral nutrition, and the use of organic and inorganic amendments might be useful for reducing Cd toxicity in vegetables. The use of low Cd accumulating vegetable cultivars in conjunction with insolubilizing amendments and proper agricultural practices might be a useful technique for reducing Cd exposure in the food chain.
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Affiliation(s)
- Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan.
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan
| | - Muhammad Adrees
- Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan
| | - Muhammad Ibrahim
- Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Muhammad Zia-Ur-Rehman
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad 38040, Pakistan
| | - Zahir Ahmad Zahir
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad 38040, Pakistan
| | - Jörg Rinklebe
- University of Wuppertal, Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; Department of Environment and Energy, Sejong University, 98 Gunja-dong, Gwnagjin-gu, Seoul, 143-747, South Korea
| | - Filip M G Tack
- Department of Applied Analytical and Physical Chemistry, Ghent University, Gent, Belgium
| | - Yong Sik Ok
- O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea.
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