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Xu B, Chu T, Zhang R, Yang R, Zhu M, Guo F, Zan S. Earthworm gut bacteria facilitate cadmium immobilization through the formation of CdS nanoparticles. CHEMOSPHERE 2024; 361:142453. [PMID: 38821127 DOI: 10.1016/j.chemosphere.2024.142453] [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: 04/03/2024] [Revised: 05/17/2024] [Accepted: 05/25/2024] [Indexed: 06/02/2024]
Abstract
Gut bacteria of earthworm Amynthas hupeiensis exhibit significant potential for the in-situ remediation of cadmium (Cd)-contaminated soil. However, the mechanisms by which these gut bacteria immobilize and tolerate Cd remain elusive. The composition of the gut bacterial community was characterized by high-throughput sequencing. Cd-tolerant bacteria were isolated from the gut, and their roles in Cd immobilization, as well as their tolerance mechanisms, were explored through chemical characterization and transcriptome analysis. The predominant taxa in the gut bacterial community included unclassified Enterobacteriaceae, Citrobacter, and Bacillus, which were distinctly different from those in the surrounding soil. Notably, the most Cd-tolerant gut bacterium, Citrobacter freundii DS strain, immobilized 63.61% of Cd2+ within 96 h through extracellular biosorption and intracellular bioaccumulation of biosynthetic CdS nanoparticles, and modulation of solution pH and NH4+ concentration. Moreover, the characteristic signals of CdS were also observed in the gut content of A. hupeiensis when the sterilized Cd-contaminated soil was inoculated with C. freundii. The primary pathways involved in the response of C. freundii to Cd stress included the regulation of ABC transporters, bacterial chemotaxis, cell motility, oxidative phosphorylation, and two-component system. In conclusion, C. freundii facilitates Cd immobilization both in vitro and in vivo, thereby enhancing the host earthworm's adaptation to Cd-contaminated soil.
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Affiliation(s)
- Bo Xu
- South Jiuhua Road No. 189, School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China.
| | - Tingting Chu
- South Jiuhua Road No. 189, School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China.
| | - Ranran Zhang
- South Jiuhua Road No. 189, School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China.
| | - Ruyi Yang
- South Jiuhua Road No. 189, School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China.
| | - Meng Zhu
- South Jiuhua Road No. 189, School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China.
| | - Fuyu Guo
- South Jiuhua Road No. 189, School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China.
| | - Shuting Zan
- South Jiuhua Road No. 189, School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China.
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Ali I, Hussain J, Yanwisetpakdee B, Iqbal I, Chen X. The effects of monoculture and intercropping on photosynthesis performance correlated with growth of garlic and perennial ryegrass response to different heavy metals. BMC PLANT BIOLOGY 2024; 24:659. [PMID: 38987675 DOI: 10.1186/s12870-024-05371-3] [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: 04/02/2024] [Accepted: 07/02/2024] [Indexed: 07/12/2024]
Abstract
BACKGROUND The potential of phytoremediation using garlic monoculture (MC) and intercropping (IC) system with perennial ryegrass to enhance the uptake of cadmium (Cd), chromium (Cr), and lead (Pb) were investigated. RESULTS Positive correlations were found between MC and IC systems, with varying biomass. Production of perennial ryegrass was affected differently depending on the type of toxic metal present in the soil. Root growth inhibition was more affected than shoot growth inhibition. The total biomass of shoot and root in IC was higher than MC, increasing approximately 3.7 and 2.9 fold compared to MC, attributed to advantages in root IC crop systems. Photosystem II efficiency showed less sensitivity to metal toxicity compared to the control, with a decrease between 10.07-12.03%. Among gas exchange parameters, only Cr significantly affected physiological responses by reducing transpiration by 69.24%, likely due to leaf chlorosis and necrosis. CONCLUSION This study exhibited the potential of garlic MC and IC with perennial ryegrass in phytoremediation. Although the different metals affect plant growth differently, IC showed advantages over MC in term biomass production.
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Affiliation(s)
- Imran Ali
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang Sichuan, 621010, China.
- Institute of Molecular Biology and Biotechnology, University of Lahore, Lahore, Pakistan.
- Institute of Biochemistry, University of Balochistan, 87300, Quetta, Pakistan.
| | - Javaid Hussain
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang Sichuan, 621010, China
| | - Benjawan Yanwisetpakdee
- Biology Program, Faculty of Science and Technology, Songkhla Rajabhat University, Songkhla, 90000, Thailand.
| | - Irfana Iqbal
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang Sichuan, 621010, China
| | - Xiaoming Chen
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang Sichuan, 621010, China.
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3
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Ma X. Heavy metals remediation through lactic acid bacteria: Current status and future prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174455. [PMID: 38964392 DOI: 10.1016/j.scitotenv.2024.174455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/14/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024]
Abstract
With the development of industrialization and urbanization, heavy metal (HM) pollution has become an urgent problem in many countries. The use of microorganisms to control HM pollution has attracted the attention of many scholars due to its advantages of mild conditions, low process cost, and no secondary pollution. In this context, this review aimed to compile recent advances on the potential of lactic acid bacteria (LAB) as HMs biosorbents. As a food-safe class of probiotic, LAB can not only be used for HM remediation in soil and wastewater, but most importantly, can be used for metal removal in food. The extracellular adsorption and intracellular accumulation are the main mechanisms of HM removal by LAB. Lactic acid (LA) fermentation is also one of the removal mechanisms, especially in the food industry. The pH, temperature, biomass, ion concentration and adsorption time are the essential parameters to be considered during the bioremediation. Although the LAB remediation is feasible in theory and lab-scale experiments, it is limited in practical applications due to its low efficiency. Therefore, the commonly used methods to improve the adsorption efficiency of LAB, including pretreatment and mixed-cultivation, are also summarized in this review. Finally, based on the review of literature, this paper presents the emerging strategies to overcome the low adsorption capacity of LAB. This review proposes the future investigations required for this field, and provides theoretical support for the practical application of LAB bioremediation of HMs.
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Affiliation(s)
- Xiaoyu Ma
- China Institute of Geo-Environment Monitoring, China Geological Survey, Beijing 100081, China.
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Zhang T, Wu Z, Ge L, Shang J, Huang Y, Liu Y, Huang L. Acidithiobacillus species mediated mineral weathering promotes lead immobilization in ferric-silica microstructures at sulfidic tailings. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 358:124492. [PMID: 38960117 DOI: 10.1016/j.envpol.2024.124492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/13/2024] [Accepted: 07/01/2024] [Indexed: 07/05/2024]
Abstract
Immobilization and stabilization of heavy metals (HMs) in sulfidic and metallic tailings are critical to long-term pollution control and sustainable ecological rehabilitation. This study aims to unravel immobilization mechanisms of Pb (Ⅱ) in the neoformed hardpan structure resulting from Acidithiobacillus spp. accelerated bioweathering of sulfides in the presence of silicates. It was found that the bioweathered mineral composite exhibited an elevated Pb (Ⅱ) adsorption capacity compared to that of natural weathered mineral composite. A suit of microspectroscopic techniques such as synchrotron-based X-ray Absorption Spectroscopy (XAS), X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR) and Field-Emission Scanning Electron Microscope (FE-SEM) indicated that secondary Fe-bearing minerals, functional groups, and surface properties in the neoformed hardpan were key factors contributing to Pb (Ⅱ) adsorption and immobilization in ferric-silica microstructures. The underlying mechanisms might involve surface adsorption-complexation, dissolution-precipitation, electrostatic attraction, and ion exchange. Microbial communities within the muscovite groups undergoing bioweathering processes demonstrated distinctive survival strategies and community composition under the prevailing geochemical conditions. This proof of concept regarding Pb (Ⅱ) immobilization in microbial transformed mineral composite would provide the basis for scaling up trials for developing field-feasible methodology to management HMs pollution in sulfidic and metallic tailings in near future.
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Affiliation(s)
- Tingrui Zhang
- College of Land Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Zeqi Wu
- College of Land Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Liqiang Ge
- National Research Center for Geoanalysis, Beijing, 100037, PR China
| | - Jianying Shang
- College of Land Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Yuanfang Huang
- College of Land Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Yunjia Liu
- College of Land Science and Technology, China Agricultural University, Beijing, 100193, PR China; Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, Brisbane, Queensland, 4072, Australia.
| | - Longbin Huang
- Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, Brisbane, Queensland, 4072, Australia
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Deng S, An Q, Song J, Yang Y, Huang Z, Feng S, Tang C, Zhao B. Enhancement of Mn 2+, Fe 2+ and NH 4+-N removal by biochar synergistic strains combined with activated sludge in real wastewater treatment. CHEMOSPHERE 2024; 359:142271. [PMID: 38734248 DOI: 10.1016/j.chemosphere.2024.142271] [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: 01/12/2024] [Revised: 04/11/2024] [Accepted: 05/05/2024] [Indexed: 05/13/2024]
Abstract
Acinetobacter sp. AL-6 combining with biochar was adapted in activated sludge (AS & co-system) to decontaminate Mn2+, Fe2+ and NH4+-N, and treat activated sludge (AS) for its activity and settling performance improvement. Specifically, the co-system promoted the growth of bacteria in the activated sludge, thus increasing its ability to nitrify and adsorb Mn2+ and Fe2+, resulting in the removal of high concentrations of NH4+-N, Mn2+, Fe2+ and COD in the reactor by 100%, 100%, 100%, and 96.8%, respectively. And the pH of wastewater was increased from 4 to 8.5 by co-system also facilitated the precipitation of Mn2+ and Fe2+. The MLVSS/MLSS ratio increased from 0.64 to 0.95 and SVI30 decreased from 92.54 to 1.54 after the addition of co-system, which indicated that biochar helped to improve the activity and settling performance of activated sludge and prevented it from being damaged by the compound Mn2+ and Fe2+. In addition, biochar promoted the increase of the tyrosine-like protein substance and humic acid-like organic matter in the sludge EPS, thus enhanced the ability of sludge to adsorb Mn2+ and Fe2+. Concretely, compared with AS group, the proteins content and polysaccharides content of the AS & co-system group were increased by 13.14 times and 6.30 times respectively. Further, microbial diversity analysis showed that more resistant bacteria and dominant bacteria Acinetobacter sp. AL-6 in sludge enhanced the nitrification and adsorption of manganese and iron under the promotion of biochar. Pre-eminently, the more effective AS & co-system were applied to the removal of actual electrolytic manganese slag leachate taken from the contaminated site, and the removal of NH4+-N, Mn2+, Fe2+ and COD remained high at 100%, 100%, 71.82% and 94.72%, respectively, revealing advanced value for high engineering applications of AS & co-system.
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Affiliation(s)
- Shuman Deng
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
| | - Qiang An
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China; The Key Laboratory of Eco-Environment in Three Gorges Reservoir Region, Chongqing University, Chongqing, 400045, PR China.
| | - Jiali Song
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
| | - Yichen Yang
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
| | - Zhiruo Huang
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
| | - Shuyun Feng
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
| | - Chuanzhu Tang
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
| | - Bin Zhao
- College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China; The Key Laboratory of Eco-Environment in Three Gorges Reservoir Region, Chongqing University, Chongqing, 400045, PR China.
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Wei L, Zhu J, Zhao D, Pei Y, Guo L, Guo J, Guo Z, Cui H, Li Y, Gao J. Microbial fungicides can positively affect aubergine photosynthetic properties, soil enzyme activity and microbial community structure. PeerJ 2024; 12:e17620. [PMID: 38952982 PMCID: PMC11216198 DOI: 10.7717/peerj.17620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 05/31/2024] [Indexed: 07/03/2024] Open
Abstract
Background This study examined the effects of microbial agents on the enzyme activity, microbial community construction and potential functions of inter-root soil of aubergine (Fragaria × ananassa Duch.). This study also sought to clarify the adaptability of inter-root microorganisms to environmental factors to provide a theoretical basis for the stability of the microbiology of inter-root soil of aubergine and for the ecological preservation of farmland soil. Methods Eggplant inter-root soils treated with Bacillus subtilis (QZ_T1), Bacillus subtilis (QZ_T2), Bacillus amyloliquefaciens (QZ_T3), Verticillium thuringiensis (QZ_T4) and Verticillium purpureum (QZ_T5) were used to analyse the effects of different microbial agents on the inter-root soils of aubergine compared to the untreated control group (QZ_CK). The effects of different microbial agents on the characteristics and functions of inter-root soil microbial communities were analysed using 16S rRNA and ITS (internal transcribed spacer region) high-throughput sequencing techniques. Results The bacterial diversity index and fungal diversity index of the aubergine inter-root soil increased significantly with the application of microbial fungicides; gas exchange parameters and soil enzyme activities also increased. The structural and functional composition of the bacterial and fungal communities in the aubergine inter-root soil changed after fungicide treatment compared to the control, with a decrease in the abundance of phytopathogenic fungi and an increase in the abundance of beneficial fungi in the soil. Enhancement of key community functions, reduction of pathogenic fungi, modulation of environmental factors and improved functional stability of microbial communities were important factors contributing to the microbial stability of fungicide-treated aubergine inter-root soils.
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Affiliation(s)
- Longxue Wei
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Jinying Zhu
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Dongbo Zhao
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Yanting Pei
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Lianghai Guo
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Jianjun Guo
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Zhihui Guo
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Huini Cui
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Yongjun Li
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
| | - Jiansheng Gao
- Dezhou Institute of Agricultural Science, Dezhou, Shandong, China
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Xie M, Zhu Y, Zhao K, Zhao L, Gong Y, Wang Y, Wang Y, Zhu M, Ran W, Cai M, Du S. R-Napropamide Potentially Regulates Cadmium Accumulation in Arabidopsis Shoots through Transport Channel Modulation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38842427 DOI: 10.1021/acs.jafc.4c03404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Heavy metal contamination in soils poses a significant environmental threat to human health. This study examines the effects of the chiral herbicide napropamide (NAP) on Arabidopsis thaliana, focusing on growth metrics and cadmium (Cd) accumulation. R-NAP does not adversely affect plant growth compared to the control, whereas S-NAP significantly reduces root length and fresh weight. Notably, R-NAP markedly increases Cd accumulation in the shoots, exceeding levels observed in the control and S-NAP. This increase coincides with reduced photosynthetic efficiency. Noninvasive electrode techniques reveal a higher net Cd absorption flux in the root mature zone under R-NAP than S-NAP, although similar to the control. Transcriptomic analysis highlights significant stereoisomer differences in Cd transporters, predominantly under R-NAP treatment. SEM and molecular docking simulations support that R-NAP primarily upregulates transporters such as HMA4. The results suggest careful management of herbicides like R-NAP in contaminated fields to avoid excessive heavy metal buildup in crops.
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Affiliation(s)
- Minghui Xie
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Yaxin Zhu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
| | - Kai Zhao
- Zhejiang Zhongyi Testing Research Institute Co., Ltd, Ningbo 315040, China
| | - Lu Zhao
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
| | - Yanxia Gong
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yin Wang
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Yuying Wang
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Mengfei Zhu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
| | - Wu Ran
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
| | - Miaozhen Cai
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Shaoting Du
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
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8
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Fang M, Sun Y, Zhu Y, Chen Q, Chen Q, Liu Y, Zhang B, Chen T, Jin J, Yang T, Zhuang L. The potential of ferrihydrite-synthetic humic-like acid composite as a soil amendment for metal-contaminated agricultural soil: Immobilization mechanisms by combining abiotic and biotic perspectives. ENVIRONMENTAL RESEARCH 2024; 250:118470. [PMID: 38373548 DOI: 10.1016/j.envres.2024.118470] [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: 12/14/2023] [Revised: 02/02/2024] [Accepted: 02/10/2024] [Indexed: 02/21/2024]
Abstract
In-situ passivation technique has attracted increasing attention for metal-contaminated agricultural soil remediation. However, metal immobilization mechanisms are mostly illustrated based on metal speciation changes and alterations in soil physicochemical properties from a macroscopic and abiotic perspective. In this study, a ferrihydrite-synthetic humic-like acid composite (FH-SHLA) was fabricated and applied as a passivator for a 90-day soil incubation. The heavy metals immobilization mechanisms of FH-SHLA were investigated by combining both abiotic and biotic perspectives. Effects of FH-SHLA application on soil micro-ecology were also evaluated. The results showed that the 5%FH-SHLA treatment significantly decreased the DTPA-extractable Pb, Cd and Zn by 80.75%, 46.82% and 63.63% after 90 days of incubation (P < 0.05), respectively. Besides, 5% FH-SHLA addition significantly increased soil pH, soil organic matter content and cation exchange capacity (P < 0.05). The SEM, FTIR, and XPS characterizations revealed that the abiotic metal immobilization mechanisms by FH-SHLA included surface complexation, precipitation, electrostatic attraction, and cation-π interactions. For biotic perspective, in-situ microorganisms synergistically participated in the immobilization process via sulfide precipitation and Fe mineral production. FH-SHLA significantly altered the diversity and composition of the soil microbial community, and enhanced the intensity and complexity of the microbial co-occurrence network. Both metal bioavailability and soil physiochemical parameters played a vital role in shaping microbial communities, while the former contributed more. Overall, this study provides new insight into the heavy metal passivation mechanism and demonstrates that FH-SHLA is a promising and environmentally friendly amendment for metal-contaminated soil remediation.
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Affiliation(s)
- Mingzhi Fang
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Yucan Sun
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Yi Zhu
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Qi Chen
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Qianhui Chen
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Yifei Liu
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China
| | - Bing Zhang
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Tan Chen
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Jun Jin
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Ting Yang
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.
| | - Linlan Zhuang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao, 266237, China
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Zhang Z, Xu D, Huang T, Zhang Q, Li Y, Zhou J, Zou R, Li X, Chen J. High levels of cadmium altered soil archaeal activity, assembly, and co-occurrence network in volcanic areas. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171529. [PMID: 38453065 DOI: 10.1016/j.scitotenv.2024.171529] [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: 11/01/2023] [Revised: 02/23/2024] [Accepted: 03/04/2024] [Indexed: 03/09/2024]
Abstract
Soil microbial communities are essential to biogeochemical cycles. However, the responses of microorganisms in volcanic soil with high heavy metal levels remain poorly understood. Here, two areas with high levels of cadmium (Cd) from the same volcano were investigated to determine their archaeal composition and assembly. In this study, the Cd concentrations (0.32-0.38 mg/ kg) in the volcanic soils exceeded the standard risk screening values (GB15618-2018) and correlated with archaeal communities strongly (P < 0.05). Moreover, the area with elevated levels of Cd (periphery) exhibited a greater diversity of archaeal species, albeit with reduced archaeal activity, compared to the area with lower levels of Cd (center). Besides, stochastic processes mainly governed the archaeal communities. Furthermore, the co-occurrence network was simplest in the periphery. The proportion of positive links between taxa increased positively with Cd concentration. Moreover, four keystone taxa (all from the family Nitrososphaeraceae) were identified from the archaeal networks. In its entirety, this study has expanded our comprehension of the variations of soil archaeal communities in volcanic areas with elevated cadmium levels and serves as a point of reference for the agricultural development of volcanic soils in China.
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Affiliation(s)
- Zihua Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Daolong Xu
- Inner Mongolia Academy of Science and Technology, Hohhot 010010, Inner Mongolia, China
| | - Tao Huang
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Qing Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Yingyue Li
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Jing Zhou
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Ruifan Zou
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China
| | - Xiaoyu Li
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China.
| | - Jin Chen
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Crop Stress Resistance and High Quality Biology of Anhui Province, Anhui Agricultural University, Hefei 230036, China.
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10
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Li Q, Chang J, Li L, Lin X, Li Y. Soil amendments alter cadmium distribution and bacterial community structure in paddy soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171399. [PMID: 38458464 DOI: 10.1016/j.scitotenv.2024.171399] [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: 12/21/2023] [Revised: 02/10/2024] [Accepted: 02/28/2024] [Indexed: 03/10/2024]
Abstract
Soil amendments play a pivotal role in ensuring the safety of food production by inhibiting the transfer of heavy metal ions from soils to crops. Nevertheless, their impact on soil characteristics and the microbial community and their role in reducing cadmium (Cd) accumulation in rice remain unclear. In this study, pot experiments were conducted to investigate the effects of three soil amendments (mineral, organic, and microbial) on the distribution of Cd speciation, organic components, iron oxides, and microbial community structure. The application of soil amendments resulted in significant reductions in the soil available Cd content (16 %-51 %) and brown rice Cd content (16 %-78 %), facilitating the transformation of Cd from unstable forms (decreasing 10 %-20 %) to stable forms (increasing 77 %-150 %) in the soil. The mineral and organic amendments increased the soil cation exchange capacity (CEC) and plant-derived organic carbon (OC), respectively, leading to reduced Cd accumulation in brown rice, while the microbial amendment enhanced OC complexity and the abundances of Firmicutes and Bacteroidota, contributing to the decreased rice Cd uptake. The synchrotron radiation-based Fourier transform infrared (SR-FTIR) spectroscopy indicated that soil amendments regulated soil Cd species by promoting iron oxides and OC coupling. Moreover, both organic and microbial amendments significantly reduced the diversity and richness of the bacterial communities and altered their compositions and structures, by increasing the relative abundances of Bacteroidota and Firmicutes and decreasing those of Acidobacteria, Actinobacteria, and Myxococcota. Soil microbiome analysis revealed that the increase of Firmicutes and Bacteroidota associated with Cd adsorption and sequestration contributed to the suppression of soil Cd reactivity. These findings offer valuable insights into the potential mechanisms by which soil amendments regulate the speciation and bioavailability of Cd, and improve the bacterial communities, thereby providing guidance for agricultural management practices.
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Affiliation(s)
- Qi Li
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Jingjing Chang
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Linfeng Li
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Xiaoyang Lin
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Yichun Li
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.
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11
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Li J, Gao Y, Li C, Wang F, Chen H, Yang X, Jeyakumar P, Sarkar B, Luo Z, Bolan N, Li X, Meng J, Wang H. Pristine and Fe-functionalized biochar for the simultaneous immobilization of arsenic and antimony in a contaminated mining soil. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:133937. [PMID: 38460259 DOI: 10.1016/j.jhazmat.2024.133937] [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: 01/10/2024] [Revised: 02/28/2024] [Accepted: 02/29/2024] [Indexed: 03/11/2024]
Abstract
This study examined the effectiveness of pristine biochar (BC) and Fe-functionalized biochar (FBC) in remediating As-Sb co-contaminated soil, and revealed the resulting impact on soil enzymatic activities and bacterial communities. Results from incubation experiments showed that the 1.5% FBC treatment reduced the bioavailable As and Sb concentration by 13.5% and 27.1%, respectively, in compared to the control, and reduced the proportion of specifically adsorbed and amorphous Fe-Mn oxide-bound metal(loid) fractions in the treated soil. Among the BC treatments, only the 1.5% BC treatment resulted in a reduction of bioavailable As by 11.7% and Sb by 21.4%. The 0.5% BC treatment showed no significant difference. The FBC achieved high As/Sb immobilization efficiency through Fe-induced electrostatic attraction, π-π electron donor-acceptor coordination, and complexation (Fe-O(H)-As/Sb) mechanisms. Additionally, the 1.5% FBC treatment led to a 108.2% and 367.4% increase in the activities of N-acetyl-β-glucosaminidase and urease in soils, respectively, compared to the control. Furthermore, it significantly increased the abundance of Proteobacteria (15.2%), Actinobacteriota (37.0%), Chloroflexi (21.4%), and Gemmatimonadota (43.6%) at the phylum level. Co-occurrence network analysis showed that FBC was better than BC in increasing the complexity of bacterial communities. Partial least squares path modeling further indicated that the addition of biochar treatments can affect soil enzyme activities by altering soil bacterial composition. This study suggests that FBC application offers advantages in simultaneous As and Sb immobilization and restructuring the bacterial community composition in metal(loid)-contaminated soil.
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Affiliation(s)
- Jiayi Li
- Agronomy College, Shenyang Agricultural University, Shenyang 110866, China; School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China
| | - Yurong Gao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Caibin Li
- Yancao Production Technology Center, Bijie Yancao Company of Guizhou Province, Bijie 551700, China
| | - Fenglin Wang
- School of Marine Sciences, Ningbo University, Ningbo 315211, China
| | - Hanbo Chen
- Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, School of Environment and Natural Resources, Zhejiang University of Science & Technology, Hangzhou 310023, China
| | - Xing Yang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecology and Environment, Hainan University, Haikou 570228, China
| | - Paramsothy Jeyakumar
- Environmental Sciences, School of Agriculture & Environment, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - Binoy Sarkar
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Zhenbao Luo
- Yancao Production Technology Center, Bijie Yancao Company of Guizhou Province, Bijie 551700, China
| | - Nanthi Bolan
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, Western Australia 6009, Australia
| | - Xiaofei Li
- School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China
| | - Jun Meng
- Agronomy College, Shenyang Agricultural University, Shenyang 110866, China.
| | - Hailong Wang
- Agronomy College, Shenyang Agricultural University, Shenyang 110866, China; School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China; Guangdong Provincial Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
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12
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Yao S, Zhou B. Enhancing phytoremediation of cadmium and arsenic in alkaline soil by Miscanthus sinensis: A study on the synergistic effect of endophytic fungi and biochar. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171458. [PMID: 38438035 DOI: 10.1016/j.scitotenv.2024.171458] [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: 11/17/2023] [Revised: 02/25/2024] [Accepted: 03/01/2024] [Indexed: 03/06/2024]
Abstract
Endophytic fungi (Trichoderma harzianum (TH) and Paecilomyces lilacinus (PL)) showed potential in phytoremediation for soils contaminated with potentially toxic elements (PTEs (Cd and As)). However, their efficiency is limited, which can be enhanced with the assistance of biochar. This study sought to investigate the effects of TH at two application rates (T1: 4.5 g m-2; T2: 9 g m-2), PL at two application rates (P1: 4.5 g m-2; P2: 9 g m-2), in conjunction with biochar (BC) at 750 g m-2 on the phytoremediation of PTEs by Miscanthus sinensis (M. sinensis). The results showed that the integration of endophytic fungi with biochar notably enhanced the accumulation of Cd and As in M. sinensis by 59.60 %-114.38 % and 49.91 %-134.60 %, respectively. The treatments T2BC and P2BC emerged as the most effective. Specifically, the P2BC treatment significantly enhanced the soil quality index (SQI > 0.55) across all examined soil layers, markedly improving the overall soil condition. It was observed that T2BC treatment could elevate the SQI to 0.56 at the 0-15 cm depth. The combined amendment shifted the primary influences on plant PTEs accumulation from fungal diversity and soil nutrients to bacterial diversity and the availability of soil PTEs. Characteristic microorganisms identified under the combined treatments were RB41 and Pezizaceae, indicating an increase in both bacterial and fungal diversity. This combination altered the soil microbial community, influencing key metabolic pathways. The combined application of PL and biochar was superior to the TH and biochar combination for the phytoremediation of M. sinensis. This approach not only enhanced the phytoremediation potential but also positively impacted soil health and microbial community, suggesting that the synergistic use of endophytic fungi and biochar is an effective strategy for improving the condition of alkaline soils contaminated with PTEs.
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Affiliation(s)
- Shaoxiong Yao
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Beibei Zhou
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
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13
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Wu J, Fu X, Zhao L, Lv J, Lv S, Shang J, Lv J, Du S, Guo H, Ma F. Biochar as a partner of plants and beneficial microorganisms to assist in-situ bioremediation of heavy metal contaminated soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171442. [PMID: 38453085 DOI: 10.1016/j.scitotenv.2024.171442] [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: 12/28/2023] [Revised: 02/19/2024] [Accepted: 03/01/2024] [Indexed: 03/09/2024]
Abstract
Synergistic remediation of heavy metal (HM) contaminated soil using beneficial microorganisms (BM) and plants is a common and effective in situ bioremediation method. However, the shortcomings of this approach are the low colonisation of BM under high levels of heavy metal stress (HMS) and the poor state of plant growth. Previous studies have overlooked the potential of biochar to mitigate the above problems and aid in-situ remediation. Therefore, this paper describes the characteristics and physicochemical properties of biochar. It is proposed that biochar enhances plant resistance to HMS and aids in situ bioremediation by increasing colonisation of BM and HM stability. On this basis, the paper focuses on the following possible mechanisms: specific biochar-derived organic matter regulates the transport of HMs in plants and promotes mycorrhizal colonisation via the abscisic acid signalling pathway and the karrikin signalling pathway; promotes the growth-promoting pathway of indole-3-acetic acid and increases expression of the nodule-initiating gene NIN; improvement of soil HM stability by ion exchange, electrostatic adsorption, redox and complex precipitation mechanisms. And this paper summarizes guidelines on how to use biochar-assisted remediation based on current research for reference. Finally, the paper identifies research gaps in biochar in the direction of promoting beneficial microbial symbiotic mechanisms, recognition and function of organic molecules, and factors affecting practical applications.
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Affiliation(s)
- Jieting Wu
- School of Environmental Science, Liaoning University, Shenyang 110036, China.
| | - Xiaofan Fu
- School of Environmental Science, Liaoning University, Shenyang 110036, China
| | - Lei Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jin Lv
- School of Environmental Science, Liaoning University, Shenyang 110036, China
| | - Sidi Lv
- School of Environmental Science, Liaoning University, Shenyang 110036, China
| | - Jing Shang
- School of Environmental Science, Liaoning University, Shenyang 110036, China
| | - Jiaxuan Lv
- School of Environmental Science, Liaoning University, Shenyang 110036, China
| | - Shuxuan Du
- School of Environmental Science, Liaoning University, Shenyang 110036, China
| | - Haijuan Guo
- School of Environmental Science, Liaoning University, Shenyang 110036, China.
| | - Fang Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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14
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Maqbool Z, Shahbaz Farooq M, Rafiq A, Uzair M, Yousuf M, Ramzan Khan M, Huo S. Unlocking the potential of biochar in the remediation of soils contaminated with heavy metals for sustainable agriculture. FUNCTIONAL PLANT BIOLOGY : FPB 2024; 51:FP23257. [PMID: 38310926 DOI: 10.1071/fp23257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 12/20/2023] [Indexed: 02/06/2024]
Abstract
Agricultural soils contaminated with heavy metals (HMs) impose a threat to the environmental and to human health. Amendment with biochar could be an eco-friendly and cost-effective option to decrease HMs in contaminated soil. This paper reviews the application of biochar as a soil amendment to immobilise HMs in contaminated soil. We discuss the technologies of its preparation, their specific properties, and effect on the bioavailability of HMs. Biochar stabilises HMs in contaminated soil, enhance the overall quality of the contaminated soil, and significantly reduce HM uptake by plants, making it an option in soil remediation for HM contamination. Biochar enhances the physical (e.g. bulk density, soil structure, water holding capacity), chemical (e.g. cation exchange capacity, pH, nutrient availability, ion exchange, complexes), and biological properties (e.g. microbial abundance, enzymatic activities) of contaminated soil. Biochar also enhances soil fertility, improves plant growth, and reduces the plant availability of HMs. Various field studies have shown that biochar application reduces the bioavailability of HMs from contaminated soil while increasing crop yield. The review highlights the positive effects of biochar by reducing HM bioavailability in contaminated soils. Future work is recommended to ensure that biochars offer a safe and sustainable solution to remediate soils contaminated with HMs.
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Affiliation(s)
- Zubaira Maqbool
- School of Food Science and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Department of Soil Science and Environmental Science, Arid Agriculture University, Rawalpindi, Pakistan
| | - Muhammad Shahbaz Farooq
- School of Food Science and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; and Rice Research Program, Crop Sciences Institute (CSI), National Agricultural Research Centre (NARC), Park Road, Islamabad 44000, Pakistan
| | - Anum Rafiq
- Institute Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Muhammad Uzair
- National Institute of Genomics and Advanced Biotechnology (NIGAB), National Agriculture Research Center (NARC), Park Road, Islamabad, Pakistan
| | - Muhammad Yousuf
- Pakistan Agriculture Research Council (PARC), G5, Islamabad, Pakistan
| | - Muhammad Ramzan Khan
- National Institute of Genomics and Advanced Biotechnology (NIGAB), National Agriculture Research Center (NARC), Park Road, Islamabad, Pakistan
| | - Shuhao Huo
- School of Food Science and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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15
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Wu Y, Yan Y, Wang Z, Tan Z, Zhou T. Biochar application for the remediation of soil contaminated with potentially toxic elements: Current situation and challenges. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119775. [PMID: 38070425 DOI: 10.1016/j.jenvman.2023.119775] [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: 07/20/2023] [Revised: 11/27/2023] [Accepted: 12/03/2023] [Indexed: 01/14/2024]
Abstract
Recently, biochar has garnered extensive attention in the remediation of soils contaminated with potentially toxic elements (PTEs) owing to its exceptional adsorption properties and straightforward operation. Most researchers have primarily concentrated on the effects, mechanisms, impact factors, and risks of biochar in remediation of PTEs. However, concerns about the long-term safety and impact of biochar have restricted its application. This review aims to establish a basis for the large-scale popularization of biochar for remediating PTEs-contaminated soil based on a review of interactive mechanisms between soil, PTEs and biochar, as well as the current situation of biochar for remediation in PTEs scenarios. Biochar can directly interact with PTEs or indirectly with soil components, influencing the bioavailability, mobility, and toxicity of PTEs. The efficacy of biochar in remediation varies depending on biomass feedstock, pyrolysis temperature, type of PTEs, and application rate. Compared to pristine biochar, modified biochar offers feasible solutions for tailoring specialized biochar suited to specific PTEs-contaminated soil. Main challenges limiting the applications of biochar are overdose and potential risks. The used biochar is separated from the soil that not only actually removes PTEs, but also mitigates the negative long-term effects of biochar. A sustainable remediation technology is advocated that enables the recovery and regeneration (95.0-95.6%) of biochar from the soil and the removal of PTEs (the removal rate of Cd is more than 20%) from the soil. Finally, future research directions are suggested to augment the environmental safety of biochar and promote its wider application.
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Affiliation(s)
- Yi Wu
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuhang Yan
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zongwei Wang
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhongxin Tan
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China; Ministry of Agriculture and Rural Affairs, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Tuo Zhou
- China State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China
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16
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Yang S, Ning Y, Li H, Zhu Y. Effects of Priestia aryabhattai on Phosphorus Fraction and Implications for Ecoremediating Cd-Contaminated Farmland with Plant-Microbe Technology. PLANTS (BASEL, SWITZERLAND) 2024; 13:268. [PMID: 38256821 PMCID: PMC10818761 DOI: 10.3390/plants13020268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/13/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024]
Abstract
The application of phosphate-solubilizing bacteria has been widely studied in remediating Cd-contaminated soil, but only a few studies have reported on the interaction of P and Cd as well as the microbiological mechanisms with phosphate-solubilizing bacteria in the soil because the activity of phosphate-solubilizing bacteria is easily inhibited by the toxicity of Cd. This paper investigates the phosphorus solubilization ability of Priestia aryabhattai domesticated under the stress of Cd, which was conducted in a soil experiment with the addition of Cd at different concentrations. The results show that the content of Ca2-P increased by 5.12-19.84%, and the content of labile organic phosphorus (LOP) increased by 3.03-8.42% after the addition of Priestia aryabhattai to the unsterilized soil. The content of available Cd decreased by 3.82% in the soil with heavy Cd contamination. Priestia aryabhattai has a certain resistance to Cd, and its relative abundance increased with the increased Cd concentration. The contents of Ca2-P and LOP in the soil had a strong positive correlation with the content of Olsen-P (p < 0.01), while the content of available Cd was negatively correlated with the contents of Olsen-P, Ca2-P, and LOP (p < 0.05). Priestia aryabhattai inhibits the transport of Cd, facilitates the conversion of low-activity P and insoluble P to Ca2-P and LOP in the soil, and increases the bioavailability and seasonal utilization of P in the soil, showing great potential in ecoremediating Cd-contaminated farmland soil with plant-microbe-combined technology.
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Affiliation(s)
- Shenghan Yang
- Institute of Loess Plateau, Shanxi University, Taiyuan 030031, China;
- School of Environment Science and Resources, Shanxi University, Taiyuan 030031, China;
| | - Yiru Ning
- School of Environment Science and Resources, Shanxi University, Taiyuan 030031, China;
- Institute of Resources and Environment Engineering, Shanxi University, Taiyuan 030031, China
| | - Hua Li
- School of Environment Science and Resources, Shanxi University, Taiyuan 030031, China;
- Shanxi Laboratory for Yellow River, Taiyuan 030031, China
| | - Yuen Zhu
- School of Environment Science and Resources, Shanxi University, Taiyuan 030031, China;
- Shanxi Laboratory for Yellow River, Taiyuan 030031, China
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Li N, Wang Y, Zhou L, Fu D, Chen T, Chen X, Wang Q, Zhu W. The joint action of biochar and plant roots on U-stressed soil remediation: Insights from bacteriomics and metabolomics. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132635. [PMID: 37793252 DOI: 10.1016/j.jhazmat.2023.132635] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 09/18/2023] [Accepted: 09/24/2023] [Indexed: 10/06/2023]
Abstract
Although biological remediation of U-stressed soil has been studied for a long time, the combined effects of biochar and plant roots are rarely discussed and its influence on rhizosphere microecology are still unknown. Based on pot experiments, we explored the combined efforts of biochar addition and plant roots on U-stressed rhizosphere soil in several ways, including soil physicochemical properties, soil enzyme activities, uranium chemical speciation, bacterial community structure and metabolic pathways. Our results indicates that the content of DTPA-extractable U decreased by 49.31% after biochar and plant roots application, whereas plant roots only treatment just decreased by 25.46%. Further research has found that the pH, CEC, enzyme activities and nutritional level of rhizosphere soil were more significantly improved after biochar and plant roots application. Meanwhile, the abundance and diversity of bacterial community was also upregulated, which was also suggested by the stronger metabolisms of lipids, carbohydrate, nucleotides as well as amino acids. Correlation analyses also certified the positive associations between soil properties, bacterial communities and metabolism. We speculated that the uranium immobilization was mainly attributed to the direct fixation of biochar for its alkalinity, CEC, DOC, etc. and the joint action of biochar and plant roots for their stimulating effects on bacteria. Our findings suggested that combination of biochar and plant roots could limit bioaccessibility of U in a larger extend than plant roots only, which may be a better strategy for rapid remediation of U-streesed soil.
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Affiliation(s)
- Nan Li
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Yilin Wang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Li Zhou
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Dengjiang Fu
- School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Tao Chen
- School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Xiaoming Chen
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
| | - Qing Wang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
| | - Wenkun Zhu
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
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18
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Zhao Z, Liu L, Sun Y, Xie L, Liu S, Li M, Yu Q. Combined microbe-plant remediation of cadmium in saline-alkali soil assisted by fungal mycelium-derived biochar. ENVIRONMENTAL RESEARCH 2024; 240:117424. [PMID: 37866531 DOI: 10.1016/j.envres.2023.117424] [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: 08/14/2023] [Revised: 10/05/2023] [Accepted: 10/15/2023] [Indexed: 10/24/2023]
Abstract
Cadmium contamination in saline-alkali soil is becoming a great concern. Combined microbe-plant remediation is an economic way to treat this contamination, but is compromised by its low cadmium-removing capacity. In this study, the novel fungus-derived biochar was prepared to enhance the salt-tolerant bacterium-plant remediation of cadmium-contaminated saline-alkali soil. This biochar was prepared by pre-incubation of living Trichoderma atroviride hyphae with imidazole and further heating at 500 °C for 1 h. The obtained fungus-derived nitrogen-doped biochar (FBioCN) exhibited the high affinity to bacterial cells, leading to efficient colonization of exogenous salt-tolerant bacteria (e.g., Rhizobacter sp. and Sphingomonas sp.) on Amaranthus hypochondriacus roots. During culturing of the plants in the cadmium-contaminated saline-alkali soil, FBioCN drastically remodeled the rhizosphere microbiome, leading to enhance colonization of the exogeneous salt-tolerant bacteria, and increase bacterial diversity. The combination of FBioCN and the exogeneous bacteria further improved the activity of rhizosphere functional enzymes, protected the plants from the multiple stress, and promoted cadmium transport from the soil to the plants. Consequently, FBioCN together with the salt-tolerant bacteria drastically improved cadmium removal from the saline-alkali soil, with the percent of cadmium removal at the rhizosphere region increasing from 35.1% to 95.1%. This study sheds a light on the application of fungus-derived biochar in combined microbe-plant remediation in saline-alkali soil.
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Affiliation(s)
- Zirun Zhao
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Lin Liu
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Ying Sun
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Liling Xie
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Shuo Liu
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Mingchun Li
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Qilin Yu
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, College of Life Sciences, Nankai University, Tianjin, 300071, China.
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Schommer VA, Nazari MT, Melara F, Braun JCA, Rempel A, Dos Santos LF, Ferrari V, Colla LM, Dettmer A, Piccin JS. Techniques and mechanisms of bacteria immobilization on biochar for further environmental and agricultural applications. Microbiol Res 2024; 278:127534. [PMID: 37944206 DOI: 10.1016/j.micres.2023.127534] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/02/2023] [Accepted: 10/19/2023] [Indexed: 11/12/2023]
Abstract
Bacteria immobilization on biochar is a promising approach to achieve high concentration and stability of microbial cells for several applications. The present review addressed the techniques utilized for bacteria immobilization on biochar, discussing the mechanisms involved in this process, as well as the further utilization in bioremediation and agriculture. This article presents three immobilization techniques, which vary according to their procedures and conditions, including cell growth, adsorption, and adaptation. The mechanisms for cell immobilization are primarily adsorption and biofilm formation on biochar. The favorable characteristics of biochar immobilization depend on the pyrolysis methods, raw materials, and properties of biochar, such as surface area, pore size, pH, zeta potential, hydrophobicity, functional groups, and nutrients. Scanning electron microscope (SEM) and colony forming unit (CFU) are the analyses commonly carried out to verify the efficiency of bacteria immobilization. The benefits of applying biochar-immobilized bacteria include soil decontamination and quality improvement, which can improve plant growth and crop yield. Therefore, this emerging technology represents a promising solution for environmental and agricultural purposes. However, it is important to evaluate the potential adverse impacts on native microbiota by introducing exogenous microorganisms.
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Affiliation(s)
- Vera Analise Schommer
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
| | - Mateus Torres Nazari
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
| | - Flávia Melara
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Julia Catiane Arenhart Braun
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Alan Rempel
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Lara Franco Dos Santos
- Graduate Program in Mining, Metallurgical and Materials Engineering (PPGE3M), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Valdecir Ferrari
- Graduate Program in Bioexperimentation, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Luciane Maria Colla
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
| | - Aline Dettmer
- Graduate Program in Food Science and Technology (PPGCTA), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Jeferson Steffanello Piccin
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
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20
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Yan Z, Wang Z, Si G, Chen G, Feng T, Liu C, Chen J. Bacteria-loaded biochar for the immobilization of cadmium in an alkaline-polluted soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:1941-1953. [PMID: 38044401 DOI: 10.1007/s11356-023-31299-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 11/26/2023] [Indexed: 12/05/2023]
Abstract
The combination of biochar and bacteria is a promising strategy for the remediation of Cd-polluted soils. However, the synergistic mechanisms of biochar and bacteria for Cd immobilization remain unclear. In this study, the experiments were conducted to evaluate the effects of the combination of biochar and Pseudomonas sp. AN-B15, on Cd immobilization, soil enzyme activity, and soil microbiome. The results showed that biochar could directly reduce the motility of Cd through adsorption and formation of CdCO3 precipitates, thereby protecting bacteria from Cd toxicity in the solution. In addition, bacterial growth further induces the formation of CdCO3 and CdS and enhances Cd adsorption by bacterial cells, resulting in a higher Cd removal rate. Thus, bacterial inoculation significantly enhances Cd removal in the presence of biochar in the solution. Moreover, soil incubation experiments showed that bacteria-loaded biochar significantly reduced soil exchangeable Cd in comparison with other treatments by impacting soil microbiome. In particular, bacteria-loaded biochar increased the relative abundance of Bacillus, Lysobacter, and Pontibacter, causing an increase in pH, urease, and arylsulfatase, thereby passivating soil exchangeable Cd and improving soil environmental quality in the natural alkaline Cd-contaminated soil. Overall, this study provides a systematic understanding of the synergistic mechanisms of biochar and bacteria for Cd immobilization in soil and new insights into the selection of functional strain for the efficient remediation of the contaminated environments by bacterial biochar composite.
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Affiliation(s)
- Zhengjian Yan
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China
| | - Zitong Wang
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China
| | - Guangzheng Si
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China
| | - Guohui Chen
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China
| | - Tingting Feng
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China
| | - Chang'e Liu
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China
- Yunnan International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management & Yunnan Think Tank of Ecological Civilization, Kunming, 650091, Yunnan, China
| | - Jinquan Chen
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Science, Yunnan University, Kunming, 650091, China.
- Yunnan International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management & Yunnan Think Tank of Ecological Civilization, Kunming, 650091, Yunnan, China.
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21
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Feng G, Mao Y, Xie G, Chen H, Wang J, Mao P, Lv J. Bioremediation of uranium (Ⅵ) using a native strain Halomonas campaniensis ZFSY-04 isolated from uranium mining and milling effluent: Potential and mechanism. CHEMOSPHERE 2024; 346:140646. [PMID: 37944766 DOI: 10.1016/j.chemosphere.2023.140646] [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: 05/02/2023] [Revised: 09/30/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
A significant surge in the exploitation of uranium resources has resulted in considerable amounts of radioactive effluents. Thus, efficient and eco-friendly uranium removal strategies need to be explored to ensure ecological safety and resource recovery. In this study, we investigated the resistance of Halomonas campaniensis strain ZFSY-04, isolated from an evaporation pool at a uranium mine site, and its potential mechanism of uranium (Ⅵ) removal. The results showed that the strain exhibited unique uranium tolerance and its growth was not significantly inhibited under a uranium concentration of 700 mg/L. It had a maximum loading capacity of 865.40 mg/g (dry weight), achieved following incubation under uranium concentration of 100 mg/L, pH 6.0, and temperature 30 °C, for 2 h, indicating that the removal of uranium by the strain was efficient and rapid. Combined with kinetic, isothermal, thermodynamic, and microspectral analyses, the mechanism of uranium loading by strain ZFSY-04 was metabolism-dependent and diverse, including, physical and chemical adsorption on the cell surface, extracellular biomineralisation, intracellular bioaccumulation, and biomineralisation. Our results highlight the unique properties of indigenous strains, including high resistance, high efficiency, rapid uranium removal, and various uranium removal strategies, which make it suitable as a new tool for in situ bioremediation and uranium-contaminated environmental resource recovery.
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Affiliation(s)
- Guangwen Feng
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Yu Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Gen Xie
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Henglei Chen
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Jun Wang
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Peihong Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Jie Lv
- College of Life Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China.
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22
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Wang H, Wang S, He X, Xie M, Cai M, Zhu Y, Du S. A promising product: Abscisic acid-producing bacterial agents for restricting cadmium enrichment in field vegetable crops. Food Chem X 2023; 19:100795. [PMID: 37780261 PMCID: PMC10534097 DOI: 10.1016/j.fochx.2023.100795] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/01/2023] [Accepted: 07/13/2023] [Indexed: 10/02/2023] Open
Abstract
Soil heavy metal contamination and its enrichment in the edible parts of crops have gained global concern. In this study, a compound bacterial agent possessing the ability to produce the plant hormone, abscisic acid (ABA), was applied to contaminated farmland in Hunan province. Its application reduced the concentration of Cd in radish, cabbage, mustard, and lettuce by 15-144%. Accordingly, the Cd contents in these vegetables were found to be below the maximum limits set by GB 2762-2017. Meanwhile, bacteria agents also led to a significant increase in crops yield by 45-82%. Furthermore, the nutritional indices, including soluble sugar and soluble protein increased by 18-66%, as well as the antioxidant indices, including total phenolic, ascorbate content, and DPPH capacity, enhanced by 12-76%, 10-49% and 50-140%, respectively. In conclusion, the use of ABA-producing bacteria is anticipated to be a novel approach for the safe use of soil with moderate and low pollution.
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Affiliation(s)
- Hua Wang
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Shengtao Wang
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Xiaolin He
- Jiangxi Province Agricultural Technology Extension Center, Nanchang 330045, China
| | - Minghui Xie
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Miaozhen Cai
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Yaxin Zhu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
| | - Shaoting Du
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China
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23
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Qi X, Zhu M, Yuan Y, Dang Z, Yin H. Bioremediation of PBDEs and heavy metals co-contaminated soil in e-waste dismantling sites by Pseudomonas plecoglossicida assisted with biochar. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132408. [PMID: 37647661 DOI: 10.1016/j.jhazmat.2023.132408] [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: 03/25/2023] [Revised: 08/05/2023] [Accepted: 08/24/2023] [Indexed: 09/01/2023]
Abstract
Biochar-assisted microbial remediation has been proposed as a promising strategy to eliminate environmental pollutants. However, studies on this strategy used in the remediation of persistent organic pollutants and heavy metals co-contaminated soil are lacking, and the effect of the combined incorporation of biochar and inoculant on the assembly, functions, and microbial interactions of soil microbiomes are unclear. Here, we studied 2,2',4,4'-tetrabrominated diphenyl ether (BDE-47) degradation and heavy metal immobilization by and biochar-based bacterial inoculant (BC/PP) in an e-waste contaminated soil, and corresponding microbial regulation mechanisms. Results showed that BC/PP addition was more effective in reducing Cu and Pb availability and degrading BDE-47 than inoculant alone. Notably, BC/PP facilitated bound-residue formation of BDE-47, reducing the ecological risk of residual BDE-47. Meanwhile, microbial carbon metabolism and enzyme activities (related to C-, N-, and P- cycles) were enhanced in soil amended with BC/PP. Importantly, biochar played a crucial role in inoculant colonization, community assembly processes, and microbiome multifunction. In the presence of biochar, positive interactions in co-occurrence networks of the bacterial community were more frequent, and higher network stability and more keystone taxa were observed (including potential degraders). These findings provide a promising strategy for decontaminating complex-polluted environments and recovering soil ecological functions.
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Affiliation(s)
- Xin Qi
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Minghan Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yibo Yuan
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou 510006, China.
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24
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Jiang W, Chen R, Lyu J, Qin L, Wang G, Chen X, Wang Y, Yin C, Mao Z. Remediation of the microecological environment of heavy metal-contaminated soil with fulvic acid, improves the quality and yield of apple. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132399. [PMID: 37647659 DOI: 10.1016/j.jhazmat.2023.132399] [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: 05/24/2023] [Revised: 08/04/2023] [Accepted: 08/23/2023] [Indexed: 09/01/2023]
Abstract
The excessive application of chemical fertilizers and pesticides in apple orchards is responsible for high levels of manganese and copper in soil, and this poses a serious threat to soil health. We conducted a three-year field experiment to study the remediation effect and mechanism of fulvic acid on soil with excess manganese and copper. The exogenous application of fulvic acid significantly reduced the content of manganese and copper in soil and plants; increased the content of calcium; promoted the growth of apple plants; improved the fruit quality and yield of apple; increased the content of chlorophyll; increased the activity of superoxide dismutase, peroxidase, and catalase; and reduced the content of malondialdehyde. The number of soil culturable microorganisms, soil enzyme activity, soil microbial community diversity, and relative abundance of functional bacteria were increased, and the detoxification of the glutathione metabolism function was enhanced. The results of this study provide new insights that will aid the remediation of soil with excess manganese and copper using fulvic acid.
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Affiliation(s)
- Weitao Jiang
- College of Horticulture Science and Engineering Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Apple Technology Innovation Center of Shandong Province, Tai'an, Shandong 271018, PR China
| | - Ran Chen
- College of Horticulture Science and Engineering Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Apple Technology Innovation Center of Shandong Province, Tai'an, Shandong 271018, PR China
| | - Jinhui Lyu
- College of Horticulture Science and Engineering Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Apple Technology Innovation Center of Shandong Province, Tai'an, Shandong 271018, PR China
| | - Lei Qin
- College of Horticulture Science and Engineering Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Apple Technology Innovation Center of Shandong Province, Tai'an, Shandong 271018, PR China
| | - Gongshuai Wang
- College of Forestry Engineering Shandong Agriculture and Engineering University, Ji'nan, Shandong 250000, PR China
| | - Xuesen Chen
- College of Horticulture Science and Engineering Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Apple Technology Innovation Center of Shandong Province, Tai'an, Shandong 271018, PR China
| | - Yanfang Wang
- College of Chemistry and Material Science Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Chengmiao Yin
- College of Horticulture Science and Engineering Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Apple Technology Innovation Center of Shandong Province, Tai'an, Shandong 271018, PR China.
| | - Zhiquan Mao
- College of Horticulture Science and Engineering Shandong Agricultural University, Tai'an, Shandong 271018, PR China; Apple Technology Innovation Center of Shandong Province, Tai'an, Shandong 271018, PR China.
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25
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Duan M, Li Z, Yan R, Zhou B, Su L, Li M, Xu H, Zhang Z. Mechanism for combined application of biochar and Bacillus cereus to reduce antibiotic resistance genes in copper contaminated soil and lettuce. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 884:163422. [PMID: 37087005 DOI: 10.1016/j.scitotenv.2023.163422] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 04/06/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023]
Abstract
The remediation of agricultural soil contaminated by antibiotic resistance genes (ARGs) is of great significance for protecting food safety and human health. Reducing the availability of copper in soil may control coresistance to ARGs. However, the feasibility of applying nano-biochar and Bacillus cereus to mitigate the spread of ARGs in Cu contaminated soil remains unclear. Therefore, this study investigated the use of biochar with different particle sizes (2 % apple branch biochar and 0.5 % nano-biochar) and 3 g m-2B. cereus in a 60-day pot experiment with growing lettuce. The effects of single and combined application on the abundances of ARGs in Cu-contaminated soil (Cu = 200 mg kg-1) were compared, and the related mechanisms were explored. Studies have shown that the addition of biochar alone is detrimental to mitigating ARGs in soil-lettuce systems. The combined application of 3 g m-2B. cereus and 0.5 % nano-biochar effectively inhibited the proliferation of ARGs in Cu-contaminated soil, and 3 g m-2B. cereus effectively inhibited the proliferation of ARGs in lettuce. Partial least squares-path modeling and network analysis showed that bacterial communities and mobile genetic elements were the key factors that affected the abundances of ARGs in rhizosphere soil, and Cu resistance genes and bioavailable copper (acid extractable state Cu (F1) + reducing state Cu (F2)) had less direct impacts. The bacterial community was the key factor that affected the abundances of ARGs in lettuce. Rhodobacter (Proteobacteria), Corynebacterium (Actinobacteria), and Methylobacterium (Proteobacteria) may have been hosts of ARGs in lettuce plants. B. cereus and nano-biochar affected the abundances of ARGs by improving the soil properties and reducing the soil bioavailability of Cu, as well as directly or indirectly changing the bacterial community composition in soil and lettuce, thereby impeding the transport of ARGs to aboveground plant parts.
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Affiliation(s)
- Manli Duan
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Zhijian Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China; China Energy Engineering Group Guangxi Electric Power Design Institute Co., Ltd., Nanning 530007, China
| | - Rupan Yan
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Beibei Zhou
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
| | - Lijun Su
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Mingxiu Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Hongbo Xu
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Zhenshi Zhang
- Northwest Engineering Corporation Limited Power China, Xi'an 710065, China
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Chen X, Wang Y, Xia H, Ren Q, Li Y, Xu L, Xie C, Wang Y. "One-can" strategy for the synthesis of hydrothermal biochar modified with phosphate groups and efficient removal of uranium(VI). JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2023; 263:107182. [PMID: 37094506 DOI: 10.1016/j.jenvrad.2023.107182] [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: 11/21/2022] [Revised: 03/08/2023] [Accepted: 04/10/2023] [Indexed: 05/03/2023]
Abstract
Significant selectivity, reasonable surface modification and increased structural porosity were three key factors to improve the competitiveness of biochar in the adsorption field. In this study, a hydrothermal bamboo-derived biochar modified with phosphate groups (HPBC) was synthesized using "one-can" strategy. BET showed that this method could effectively increase the specific surface area (137.32 m2 g-1) and simulation of wastewater experiments indicated HPBC had an excellent selectivity for U(VI) (70.35%), which was conducive to removal of U(VI) in real and complex environments. The accurate matchings of pseudo-second-order kinetic model, thermodynamic model and Langmuir isotherm showed that at 298 K, pH = 4.0, the adsorption process dominated by chemical complexation and monolayer adsorption was spontaneous, endothermic and disordered. Saturated adsorption capacity of HPBC could reach 781.02 mg g-1 within 2 h. The introduction of phosphoric acid and citric acid by "one-can" method not only provided abundant -PO4 to assist adsorption, but also activated oxygen-containing groups on the surface of the bamboo matrix. Results showed that adsorption mechanism of U(VI) by HPBC included electrostatic action and chemical complexation involving P-O, PO and ample oxygen-containing functional groups. Therefore, HPBC with high phosphorus content, outstanding adsorption performance, excellent regeneration, remarkable selectivity and green value provided a novel solution for the field of radioactive wastewater treatment.
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Affiliation(s)
- Xinchen Chen
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, Jiangxi, China
| | - Yang Wang
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, Jiangxi, China
| | - Hongtao Xia
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, Jiangxi, China
| | - Qi Ren
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, Jiangxi, China
| | - Yang Li
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, Jiangxi, China
| | - Lejin Xu
- School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Chuting Xie
- School of Architecture & Urban Planning, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Yun Wang
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, Jiangxi, China.
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27
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Zhang T, Li T, Zhou Z, Li Z, Zhang S, Wang G, Xu X, Pu Y, Jia Y, Liu X, Li Y. Cadmium-resistant phosphate-solubilizing bacteria immobilized on phosphoric acid-ball milling modified biochar enhances soil cadmium passivation and phosphorus bioavailability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 877:162812. [PMID: 36924951 DOI: 10.1016/j.scitotenv.2023.162812] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 02/15/2023] [Accepted: 03/08/2023] [Indexed: 05/06/2023]
Abstract
Cadmium (Cd) can accumulate in agriculture soil from the regular application of phosphorus (P) fertilizer. Microbiological method is considered as a potentially effective strategy that can not only remediate the Cd-contaminated soil but also provide the phosphorus needed for crop growth. However, the toxicity of Cd may affect the activity of microorganisms. To solve this problem, Klebsiella variicola with excellent phosphate solubilization ability (155.30 mg L-1 at 48 h) and Cd adsorption rate (90.84 % with 10 mg L-1 Cd initial concentration) was firstly isolated and identified in this study. Then, a phosphoric acid and ball milling co-modified biochar (PBC) was selected as the carrier to promote the activities of K. variicola under Cd pollution. Surface characterization revealed that the promotion of K. variicola by PBC was mainly attributed to the large specific surface area and diverse functional groups. Compared to contaminated soil, microbial PBC (MPBC) significantly increased the pakchoi biomass and phosphorus (P) content, while the Cd content in leave and root of pakchoi (Brassica chinensis L.) decreased by 25.90-43.46 % (P < 0.05). The combined application also favored the transformation of the resistant P fractions to bioavailable P, and facilitated the immobilization of 20.12 % exchangeable Cd to reducible, oxidizable, and residual Cd in the treated soil. High-throughput sequencing revealed that the response of the soil microbial community to the MPBC was more beneficial than K. variicola or PBC alone. Therefore, the application of MPBC has the potential to act as an efficient, stable, and environmentally friendly sustainable product for Cd remediation and enhanced P bioavailability in agricultural production.
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Affiliation(s)
- Tingrui Zhang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Ting Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China.
| | - Zijun Zhou
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
| | - Zengqiang Li
- College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China
| | - Shirong Zhang
- College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China
| | - Guiyin Wang
- College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoxun Xu
- College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China
| | - Yulin Pu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Yongxia Jia
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaojing Liu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Yun Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
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28
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Gao J, Han H, Gao C, Wang Y, Dong B, Xu Z. Organic amendments for in situ immobilization of heavy metals in soil: A review. CHEMOSPHERE 2023:139088. [PMID: 37268229 DOI: 10.1016/j.chemosphere.2023.139088] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 05/24/2023] [Accepted: 05/29/2023] [Indexed: 06/04/2023]
Abstract
There is a growing need for soil remediation due to the increase in heavy metals (HMs) migrating into the soil environment, especially those from man-made sources dominated by industry and agriculture. In situ immobilization technology, because of its lower life cycle environmental footprint, can achieve "green and sustainable remediation" of soil heavy-metal pollution. Among the various in situ immobilization remediation agents, organic amendments (OAs) stand out as they can act as soil conditioners while acting as HMs immobilization agents, and therefore have excellent application prospects. In this paper, the types and remediation effects of OAs for HMs in situ immobilization in soil are summarized. OAs have an important effect on the soil environment and other active substances in soil while interacting with HMs in soil. Based on these factors, the principle and mechanism of HMs in situ immobilization in soil using OAs are summarized. Given the complex differential characteristics of soil itself, it is impossible to determine whether it can remain stable after heavy-metal remediation; therefore, there is still a gap in knowledge regarding the compatibility and long-term effectiveness of OAs with soil. In the future, it is necessary to develop a reasonable HMs contamination remediation program for in situ immobilization and long-term monitoring through interdisciplinary integration techniques. These findings are expected to provide a reference for the development of advanced OAs and their applications in engineering.
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Affiliation(s)
- Jun Gao
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - Haoxuan Han
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Chang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Yuhao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Bin Dong
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541006, China.
| | - Zuxin Xu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
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Xu H, Huang Y, Xiong X, Zhu H, Lin J, Shi J, Tang C, Xu J. Changes in soil Cd contents and microbial communities following Cd-containing straw return. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 330:121753. [PMID: 37127235 DOI: 10.1016/j.envpol.2023.121753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/22/2023] [Accepted: 04/28/2023] [Indexed: 05/03/2023]
Abstract
Contamination of soil with cadmium (Cd) threatens food safety and human health. In general, crop straws from contaminated soils could accumulate considerable amounts of Cd. The addition of Cd-containing rice straw can have negative effects on soil environment. In this study, straws varying in Cd concentration were added to soil at a rate of 5% (w/w) to investigate the effects of Cd-containing straw on soil Cd dynamics and soil microbial communities. Results showed that large amounts of Cd, especially bioavailable Cd, were released into soil during the decomposition of Cd-containing straws. The addition of straws with 10, 20 and 40 mg kg-1 Cd increased total Cd in soils from 0.31 mg kg-1 to 0.89, 1.39 and 2.09 mg kg-1, respectively, exceeding the screening value of total Cd < 0.4 mg kg-1 for paddy soils of pH 5.5-6.5 according to Chinese Soil Environmental Quality Standards. Moreover, the addition of Cd-containing straw decreased alpha-diversity of bacterial and fungal communities compared to the clean straw. Indeed, changes in soil factors including pH, Eh, dissolved organic C and Cd level jointly reconstructed soil microbial communities. The addition of Cd-containing straw increased the relative abundance of bacterial species Acidobacteria and Proteobacteria but decreased that of Firmicutes. Meanwhile, it increased the relative abundance of fungal species Basidiomycota and Fusarium which were considered Cd-tolerant. This study revealed the potential environmental risk and the variation of microbial communities caused by increasing soil Cd bioavailability after direct application of Cd-containing rice straw to the field.
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Affiliation(s)
- Haojie Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Yu Huang
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Xinquan Xiong
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Hang Zhu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Jiahui Lin
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Jiachun Shi
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Caixian Tang
- Department of Animal, Plant & Soil Sciences / La Trobe Institute for Sustainable Agriculture and Food, La Trobe University, Bundoora, Vic, 3086, Australia
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China.
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Wang C, Wang G, Xie S, Dong Z, Zhang L, Zhang Z, Song J, Deng Y. Phosphorus-rich biochar modified with Alcaligenes faecalis to promote U(VI) removal from wastewater: Interfacial adsorption behavior and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2023; 454:131484. [PMID: 37156195 DOI: 10.1016/j.jhazmat.2023.131484] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/14/2023] [Accepted: 04/23/2023] [Indexed: 05/10/2023]
Abstract
Phosphorus-rich biochar (PBC) has been extensively studied due to its significant adsorption effect on U(VI). However, the release of phosphorus from PBC into solution decreases its adsorption performance and reusability and causes phosphorus pollution of water. In this study, Alcaligenes faecalis (A. faecalis) was loaded on PBC to produce a novel biocomposite (A/PBC). After adsorption equilibrium, phosphorus released into solution from PBC was 2.32 mg/L, while it decreased to 0.34 mg/L from A/PBC (p < 0.05). The U(VI) removal ratio of A/PBC reached nearly 100%, which is 13.08% higher than that of PBC (p < 0.05), and it decreased only by 1.98% after 5 cycles. When preparing A/PBC, A. faecalis converted soluble phosphate into insoluble metaphosphate minerals and extracellular polymeric substances (EPS). And A. faecalis cells accumulated through these metabolites and formed biofilm attached to the PBC surface. The adsorption of metal cations on phosphate further contributed to phosphorus fixation in the biofilm. During U(VI) adsorption by A/PBC, A. faecalis synthesize EPS and metaphosphate minerals by using the internal components of PBC, thus increasing the abundance of acidic functional groups and promoting U(VI) adsorption. Hence, A/PBC can be a green and sustainable material for U(VI) removal from wastewater.
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Affiliation(s)
- Chenxu Wang
- School of Civil Engineering, University of South China, Hengyang 421001, China
| | - Guohua Wang
- School of Civil Engineering, University of South China, Hengyang 421001, China
| | - Shuibo Xie
- School of Civil Engineering, University of South China, Hengyang 421001, China; Key Discipline Laboratory for National Defense of Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China.
| | - Zhitao Dong
- School of Civil Engineering, University of South China, Hengyang 421001, China
| | - Lantao Zhang
- School of Civil Engineering, University of South China, Hengyang 421001, China
| | - Zhiyue Zhang
- School of Civil Engineering, University of South China, Hengyang 421001, China
| | - Jian Song
- School of Civil Engineering, University of South China, Hengyang 421001, China
| | - Yibo Deng
- School of Civil Engineering, University of South China, Hengyang 421001, China
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Schommer VA, Vanin AP, Nazari MT, Ferrari V, Dettmer A, Colla LM, Piccin JS. Biochar-immobilized Bacillus spp. for heavy metals bioremediation: A review on immobilization techniques, bioremediation mechanisms and effects on soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 881:163385. [PMID: 37054796 DOI: 10.1016/j.scitotenv.2023.163385] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/15/2023]
Abstract
Heavy metals contamination present risks to ecosystems and human health. Bioremediation is a technology that has been applied to minimize the levels of heavy metals contamination. However, the efficiency of this process varies according to several biotic and abiotic aspects, especially in environments with high concentrations of heavy metals. Therefore, microorganisms immobilization in different materials, such as biochar, emerges as an alternative to alleviate the stress that heavy metals have on microorganisms and thus improve the bioremediation efficiency. In this context, this review aimed to compile recent advances in the use of biochar as a carrier of bacteria, specifically Bacillus spp., with subsequent application for the bioremediation of soil contaminated with heavy metals. We present three different techniques to immobilize Bacillus spp. on biochar. Bacillus strains are capable of reducing the toxicity and bioavailability of metals, while biochar is a material that serves as a shelter for microorganisms and also contributes to bioremediation through the adsorption of contaminants. Thus, there is a synergistic effect between Bacillus spp. and biochar for the heavy metals bioremediation. Biomineralization, biosorption, bioreduction, bioaccumulation and adsorption are the mechanisms involved in this process. The application of biochar-immobilized Bacillus strains results in beneficial effects on the contaminated soil, such as the reduction of toxicity and accumulation of metals in plants, favoring their growth, in addition to increasing microbial and enzymatic activity in soil. However, competition and reduction of microbial diversity and the toxic characteristics of biochar are reported as negative impacts of this strategy. More studies using this emerging technology are essential to improve its efficiency, to elucidate the mechanisms and to balance positive and negative impacts, especially at the field scale.
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Affiliation(s)
- Vera Analise Schommer
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Ana Paula Vanin
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Mateus Torres Nazari
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Valdecir Ferrari
- Graduate Program in Mining, Metallurgical and Materials Engineering (PPGE3M), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Aline Dettmer
- Graduate Program in Food Science and Technology (PPGCTA), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Luciane Maria Colla
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
| | - Jeferson Steffanello Piccin
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
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32
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Li N, Liu Y, Du C, Wang Y, Wang L, Li X. A novel role of various hydrogen bonds in adsorption, desorption and co-adsorption of PPCPs on corn straw-derived biochars. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 861:160623. [PMID: 36460113 DOI: 10.1016/j.scitotenv.2022.160623] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/24/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
The effect of various hydrogen bonds with different strength on the environmental behaviors of PPCPs remains unclear. In this study, three pharmaceutical pollutants including clofibric acid (CA), sulfamerazine (SMZ), and acetaminophen (ACT) with different functional groups and pKa, were selected as representative of PPCPs to investigate the pivotal role of hydrogen bonds in adsorption/desorption and co-adsorption behaviors of PPCPs on two corn straw-derived biochars prepared at 300 °C (BCs-300) and 600 °C (BCs-600), respectively. The results indicated that charge-assisted hydrogen bond (CAHB) and ordinary hydrogen bond (OHB) with different intensities were the pivotal mechanisms responsible for the adsorption of three PPCPs on biochars, which was further confirmed by FTIR, but their immobilization effects of PPCPs on biochars were completely different. Compared with OHB formed between CA and BCs-600, the stronger CAHB (formed between CA and BCs-300, and SMZ/ACT and BCs-300/BCs-600) with covalent bond characteristics that derived from the smaller |ΔpKa| (<5.0), resulted in the greater adsorption capacity (Qs) and affinity (Kf) of the three PPCPs on BCs-300 (Qs ≥ 195 μmol·g-1, Kf ≥ 1.9956) than that on BCs-600 (Qs ≤ 92 μmol·g-1, Kf ≤ 0.5192), thereby making the better immobilization effect of PPCPs by biochar. In addition, in the coexisting systems, either SMZ coexisting with CA/ACT on BCs-300, or ACT coexisting with CA/SMZ on BCs-600, both implied that when the |ΔpKa| between the target PPCPs and biochar is smaller than that between the coexisting compound and biochar, the target PPCPs can preferentially occupy the shared hydrogen bond sites on the biochar surface, and hard to be replaced by the coexisting compound. This work not only expand the application of designed biochar as engineering adsorbents to control and removal of the specific PPCPs in the environment, but also facilitate accurate assessment of the environmental risk of co-existing PPCPs.
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Affiliation(s)
- Nana Li
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Yifan Liu
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Cong Du
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Yue Wang
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China
| | - Lijun Wang
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China
| | - Xiaoyun Li
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China; International Joint Research Centre of Shaanxi Province for Pollutants Exposure and Eco-environmental Health, Xi'an 710119, China.
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Zhu Y, Ge X, Wang L, You Y, Cheng Y, Ma J, Chen F. Biochar rebuilds the network complexity of rare and abundant microbial taxa in reclaimed soil of mining areas to cooperatively avert cadmium stress. Front Microbiol 2022; 13:972300. [PMID: 35983321 PMCID: PMC9378816 DOI: 10.3389/fmicb.2022.972300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 07/08/2022] [Indexed: 11/13/2022] Open
Abstract
Understanding the interactions between the soil microbial communities and species is critical in the remediation of heavy metal-contaminated soil. Biochar has been widely applied as a stabilizer in the in situ remediation of cadmium (Cd)-contaminated soils in mining areas. However, the rebuilding of the microbial taxa of rare and abundant species by biochar and their cooperative resistance to Cd stress remains elusive. In this pursuit, the present study envisaged the effects of two types of biochars viz., poplar bark biochar (PB) and thiourea-modified poplar bark biochar (TP) on the rare and abundant bacterial and fungal taxa by using pot experiments. The results demonstrated that the PB and TP treatments significantly reduced the leached Cd content, by 35.13 and 68.05%, respectively, compared with the control group (CK), in the reclaimed soil of the mining area. The application of biochar significantly improved the physicochemical properties like pH and Soil Organic Matter (SOM) of the soil. It was observed that TP treatment was superior to the PB and CK groups in increasing the diversity of the soil abundant and rare species of microbial taxa. Compared with the CK group, the application of PB and TP enhanced and elevated the complexity of the microbial networks of rare and abundant taxa, increased the number and types of network core microorganisms, reshaped the network core microorganisms and hubs, and boosted the microbial resistance to Cd stress. Our results indicate the response of rare and abundant microbial taxa to biochar application and the mechanism of their synergistic remediation of Cd-contaminated soil, thereby providing technical feasibility for in situ remediation of Cd-contaminated soil in mining areas.
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Affiliation(s)
- Yanfeng Zhu
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou, China
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
| | - Xiaoping Ge
- College of Hydrology and Water Resources, Hohai University, Nanjing, China
| | - Liping Wang
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
- Liping Wang,
| | - Yunnan You
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
| | - Yanjun Cheng
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
| | - Jing Ma
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou, China
- School of Public Administration, Hohai University, Nanjing, China
| | - Fu Chen
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, Xuzhou, China
- School of Public Administration, Hohai University, Nanjing, China
- *Correspondence: Fu Chen,
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