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Ji Y, Xu J, Zhu L. Redox potential model for guiding moderate oxidation of polycyclic aromatic hydrocarbons in soils. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134443. [PMID: 38678701 DOI: 10.1016/j.jhazmat.2024.134443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
In-situ chemical oxidation is an important approach to remediate soils contaminated with persistent organic pollutants, e.g., polycyclic aromatic hydrocarbons (PAHs). However, massive oxidants are added into soils without an explicit model for predicting the redox potential (Eh) during soil remediation, and overdosed oxidants would pose secondary damage by disturbing soil organic matter and acidity. Here, a soil redox potential (Eh) model was first established to quantify the relationship among oxidation parameters, crucial soil properties, and pollutant elimination. The impacts of oxidant types and doses, soil pH, and soil organic carbon contents on soil Eh were systematically clarified in four commonly used oxidation systems (i.e., KMnO4, H2O2, fenton, and persulfate). The relative error of preliminary Eh model was increased from 48-62% to 4-16% after being modified with the soil texture and dissolved organic carbon, and this high accuracy was verified by 12 actual PAHs contaminated soils. Combining the discovered critical oxidation potential (COP) of PAHs, the moderate oxidation process could be regulated by the guidance of the soil Eh model in different soil conditions. Moreover, the product analysis revealed that the hydroxylation of PAHs occurred most frequently when the soil Eh reached their COP, providing a foundation for further microorganism remediation. These results provide a feasible strategy for selecting oxidants and controlling their doses toward moderate oxidation of contaminated soils, which will reduce the consumption of soil organic matter and protect the main structure and function of soil for future utilization. ENVIRONMENTAL IMPLICATIONS: This study provides a novel insight into the moderate chemical oxidation by the Eh model and largely reduces the secondary risks of excessive oxidation and oxidant residual in ISCO. The moderate oxidation of PAHs could be a first step to decrease their toxicity and increase their bioaccessibility, favoring the microbial degradation of PAHs. Controlling the soil Eh with the established model here could be a promising approach to couple moderate oxidation of organic contaminants with microbial degradation. Such an effective and green soil remediation will largely preserve the soil's functional structure and favor the subsequent utilization of remediated soil.
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Affiliation(s)
- Yanping Ji
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Jiang Xu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Lizhong Zhu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
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Li Q, Zheng Y, Guo L, Xiao Y, Li H, Yang P, Xia L, Liu X, Chen Z, Li L, Zhang H. Microbial Degradation of Tetracycline Antibiotics: Mechanisms and Environmental Implications. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38835142 DOI: 10.1021/acs.jafc.4c02677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
The escalating global consumption of tetracyclines (TCs) as broad-spectrum antibiotics necessitates innovative approaches to mitigate their pervasive environmental persistence and associated risks. While initiatives such as China's antimicrobial reduction efforts highlight the urgency of responsible TC usage, the need for efficient degradation methods remains paramount. Microbial degradation emerges as a promising solution, offering novel insights into degradation pathways and mechanisms. Despite challenges, including the optimization of microbial activity conditions and the risk of antibiotic resistance development, microbial degradation showcases significant innovation in its cost-effectiveness, environmental friendliness, and simplicity of implementation compared to traditional degradation methods. While the published reviews have summarized some aspects of biodegradation of TCs, a systematic and comprehensive summary of all the TC biodegradation pathways, reactions, intermediates, and final products including ring-opening products involved with enzymes and mechanisms of each bacterium and fungus reported is necessary. This review aims to fill the current gap in the literature by offering a thorough and systematic overview of the structure, bioactivity mechanism, detection methods, microbial degradation pathways, and molecular mechanisms of all tetracycline antibiotics in various microorganisms. It comprehensively collects and analyzes data on the microbial degradation pathways, including bacteria and fungi, intermediate and final products, ring-opening products, product toxicity, and the degradation mechanisms for all tetracyclines. Additionally, it points out future directions for the discovery of degradation-related genes/enzymes and microbial resources that can effectively degrade tetracyclines. This review is expected to contribute to advancing knowledge in this field and promoting the development of sustainable remediation strategies for contaminated environments.
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Affiliation(s)
- Qin Li
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
- Engineering Research Center of Industrial Microbiology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
- Collaborative Innovation Center of Hai'xi Green Bio-Manufacturing Technology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
| | - Yanhong Zheng
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
| | - Lijun Guo
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
- Engineering Research Center of Industrial Microbiology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
| | - Ying Xiao
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
| | - Haiyue Li
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
| | - Pingping Yang
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
| | - Li Xia
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
- Collaborative Innovation Center of Hai'xi Green Bio-Manufacturing Technology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
| | - Xiangqing Liu
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
| | - Zhangyan Chen
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
- Collaborative Innovation Center of Hai'xi Green Bio-Manufacturing Technology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
| | - Li Li
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
- Engineering Research Center of Industrial Microbiology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
- Collaborative Innovation Center of Hai'xi Green Bio-Manufacturing Technology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
| | - Huaidong Zhang
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350117, People's Republic of China
- Engineering Research Center of Industrial Microbiology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
- Collaborative Innovation Center of Hai'xi Green Bio-Manufacturing Technology, Ministry of Education, Fuzhou, Fujian 350117, People's Republic of China
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Zou Y, Hu Y, Li S, Huang X, Cheng X, Pan W. Remediation of crude oil contaminated soil through an integrated biological-chemical-biological strategy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 919:170756. [PMID: 38340816 DOI: 10.1016/j.scitotenv.2024.170756] [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: 11/21/2023] [Revised: 01/28/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
A plausible approach to remediating petroleum contaminated soil is the integration of chemical and biological treatments. Using appropriate chemical oxidation, the integrated remediation can be effectively achieved to stimulate the biodegradation process, consequently bolstering the overall remediation effect. In this study, an integrated biological-chemical-biological strategy was proposed. Both conventional microbial degradation techniques and a modified Fenton method were employed, and the efficacy of this strategy on crude oil contaminated soil, as well as its impact on pollutant composition, soil environment, and soil microorganism, was assessed. The results showed that this integrated remediation realized an overall 68.3 % removal rate, a performance 1.7 times superior to bioremediation alone and 2.1 times more effective than chemical oxidation alone, elucidating that the biodegradation which had become sluggish was invigorated by the judicious application of chemical oxidation. By optimizing the positioning of chemical treatment, the oxidization was allowed to act predominantly on refractory substances like resins, thus effectively enhancing pollutant biodegradability. Concurrently, this oxidating maneuver contributed to a significant increase in concentrations of dissolvable nutrients while maintaining appropriate soil pH levels, thereby generating favorable growth conditions for microorganism. Moreover, attributed to the proliferation and accumulation of degrading bacteria during the initial bioremediation phase, the microbial growth subsequent to oxidation showed rapid resurgence and the relative abundance of typical petroleum-degrading bacteria, particularly Proteobacteria, was substantially increased, which played a significant role in enhancing overall remediation effect. Our research validated the feasibility of biological-chemical-biological strategy and elucidated its correlating mechanisms, presenting a salient reference for the further studies concerning the integrated remediation of petroleum contaminated soil.
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Affiliation(s)
- Yulin Zou
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yuanyuan Hu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Sicheng Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xiaojia Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xiaowei Cheng
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Weibin Pan
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China.
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Chen D, Hu X, Chen C, Lin D, Xu J. Tailoring Fe 0 Nanoparticles via Lattice Engineering for Environmental Remediation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:17178-17188. [PMID: 37903754 DOI: 10.1021/acs.est.3c05129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
Lattice engineering of nanomaterials holds promise in simultaneously regulating their geometric and electronic effects to promote their performance. However, local microenvironment engineering of Fe0 nanoparticles (nFe0) for efficient and selective environmental remediation is still in its infancy and lacks deep understanding. Here, we present the design principles and characterization techniques of lattice-doped nFe0 from the point of view of microenvironment chemistry at both atomic and elemental levels, revealing their crystalline structure, electronic effects, and physicochemical properties. We summarize the current knowledge about the impacts of doping nonmetal p-block elements, transition-metal d-block elements, and hybrid elements into nFe0 crystals on their local coordination environment, which largely determines their structure-property-activity relationships. The materials' reactivity-selectivity trade-off can be altered via facile and feasible approaches, e.g., controlling doping elements' amounts, types, and speciation. We also discuss the remaining challenges and future outlooks of using lattice-doped nFe0 materials in real applications. This perspective provides an intuitive interpretation for the rational design of lattice-doped nFe0, which is conducive to real practice for efficient and selective environmental remediation.
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Affiliation(s)
- Du Chen
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaohong Hu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Chaohuang Chen
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Daohui Lin
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China
| | - Jiang Xu
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China
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