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Wang X, Hadizadeh MH, Wang W, Hu Y, Zhou Y, Xu F, Sun Y, Wang W. DFT and AIMD insights into heterogeneous dissociation of 2-chlorothiophenol on CuO(111) surface: Impact of H 2O and OH. CHEMOSPHERE 2024; 359:142228. [PMID: 38705407 DOI: 10.1016/j.chemosphere.2024.142228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 04/29/2024] [Accepted: 05/01/2024] [Indexed: 05/07/2024]
Abstract
Copper oxides are vital catalysts in facilitating the formation of polychlorinated thianthrenes/dibenzothiophenes (PCTA/DTs) through heterogeneous reactions in high-temperature industrial processes. Chlorothiophenols (CTPs) are the most crucial precursors for PCTA/DT formation. The initial step in this process is the metal-catalyzed production of chlorothiophenoxy radicals (CTPRs) from CTPs via dissociation reactions. This work combines density functional theory (DFT) calculations with ab initio molecular dynamics (AIMD) simulations to explore the formation mechanism of the adsorbed 2-CTPR from 2-CTP, with the assistance of CuO(111). Our study demonstrates that flat adsorption configurations of 2-CTP on the CuO(111) surface are more stable than vertical configurations. The CuO(111) surface acts as a strong catalyst, facilitating the dissociation of 2-CTP into the adsorbed 2-CTPR. Surface oxygen vacancies enhance the adsorption of 2-CTP on the CuO(111) surface, while moderately suppressing the dissociation of 2-CTP. More importantly, water molecules and surface hydroxyl groups actively promote the dissociation of 2-CTP. Specifically, water directly participates in the reaction through "water bridge", enabling a barrier-free process. This research provides molecular-level insights into the heterogeneous generation of dioxins with the catalysis of metal oxides in fly ash from static and dynamic aspects, providing novel approaches for reducing dioxin emissions and establishing dioxin control strategies.
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Affiliation(s)
- Xiaotong Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Mohammad Hassan Hadizadeh
- Environment Research Institute, Shandong University, Qingdao, 266237, China; International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Wei Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Yongxia Hu
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Ying Zhou
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Fei Xu
- Environment Research Institute, Shandong University, Qingdao, 266237, China; Shenzhen Research Institute of Shandong University, Shenzhen, 518057, China.
| | - Yanhui Sun
- College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
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Ye C, Tu Y, Ling H, Chen Y, Liu Y, Zhang R, Zhang X. Occurrence, physicochemical properties and environmental behavior of polychlorinated dibenzothiophenes: A comprehensive review and future perspectives. ENVIRONMENTAL RESEARCH 2024; 245:118007. [PMID: 38154561 DOI: 10.1016/j.envres.2023.118007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/30/2023] [Accepted: 12/20/2023] [Indexed: 12/30/2023]
Abstract
Polychlorinated dibenzothiophenes (PCDTs) are a form of emerging pollutant that has attracted great attention due to their structural resemblance to dioxins, which cast detrimental influence on the ecosystem and human health. This review shows the current status of research on PCDTs, focusing on their environmental occurrence, physicochemical properties, environmental behavior, and toxicity. Studies have suggested that the steps leading to the formation of PCDTs resemble those generating polychlorinated dibenzo-p-dioxin/dibenzofurans (PCDD/Fs), indicating their probable origin from the same sources. Furthermore, they may undergo a dechlorination process as a result of their photodegradation in the environment and metabolic reaction occurring within organisms, which could result in the conversion of these substances into additional pollutants like dibenzothiophene. PCDTs exist widely in the environmental media and have high logKOW values (>4.0), indicating their tendency to bioaccumulate. Moreover, the prediction results of EPI (Estimation Program Interface) Suite demonstrated a strong accumulation capacity for tetra-CDTs in fish compared to other chlorinated PCDTs. The biotransformation half-life of PCDTs would prolong with an increasing number of substituted Cl atoms in fish. A limited number of studies have also suggested that PCDTs can cause damage to the liver and immune system in living organisms, and the toxicity of PCDTs depends on the number and position of substituted Cl atoms. Future studies should be conducted on processes causing PCDT toxicity as well as their behavior and fate in actual environments.
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Affiliation(s)
- Chunmeng Ye
- Jiangsu Environmental Engineering Technology Co., Ltd. Jiangsu Environmental Protection Group Co., Ltd. Jiangsu Nanjing 210036, China; Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, China
| | - Yong Tu
- Jiangsu Environmental Engineering Technology Co., Ltd. Jiangsu Environmental Protection Group Co., Ltd. Jiangsu Nanjing 210036, China; Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, China
| | - Hong Ling
- Jiangsu Environmental Engineering Technology Co., Ltd. Jiangsu Environmental Protection Group Co., Ltd. Jiangsu Nanjing 210036, China; Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, China
| | - Yong Chen
- Jiangsu Environmental Engineering Technology Co., Ltd. Jiangsu Environmental Protection Group Co., Ltd. Jiangsu Nanjing 210036, China; Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, China.
| | - Yang Liu
- Jiangsu Environmental Engineering Technology Co., Ltd. Jiangsu Environmental Protection Group Co., Ltd. Jiangsu Nanjing 210036, China; Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, China
| | - Rui Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
| | - Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Anhui Hefei 230601, China.
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Cheng Y, Quan L, Vadiveloo A, Yang L, Saber AA, Lan S, A Alsaif SS, Wang Z, Wu L. Optimizing the algae-bacteria biofilm reactor for imidacloprid wastewater treatment: An evaluation of hydraulic retention times for enhanced efficiency and energy savings. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120420. [PMID: 38387358 DOI: 10.1016/j.jenvman.2024.120420] [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: 12/17/2023] [Revised: 01/30/2024] [Accepted: 02/15/2024] [Indexed: 02/24/2024]
Abstract
Recent observations have highlighted the rapidly growing prevalence of emerging contaminants such as Imidacloprid (IMI) within our environment. These insecticidal pollutants, coexisting with more traditional contaminants, have become predominant in aquatic systems, posing risks to both human and ecological well-being. Among the various wastewater treatment approaches tested, biofilm reactors are currently gaining prominence. In this study, we employed an Algae-Bacteria Biofilm Reactor (ABBR) to concurrently address both conventional and emergent contaminants, specifically IMI, over an extended timeframe. Following a 60-day assessment, the ABBR consistently demonstrated removal efficiencies exceeding 85% for total dissolved nitrogen, ammonia nitrogen, and total dissolved phosphorus, and also achieved removal efficacy for the soluble chemical oxygen demand (sCOD). Despite the removal efficiency of IMI (with initial concentration is 1.0 mg/L) in ABBR showed a gradual decline over the extended period, it remained consistently effective over 50% due to the microalgae-mediated free radical reactions, indicating the ABBR's sustained efficiency in long-duration operations. Additionally, applying some non-conventional modifications, like aeration removal and reducing light exposure, demonstrated minimal impact on the reactor's pollutant removal efficiencies, achieving comparable results to the control group (which utilized aeration with a 14:10 light/dark ratio), 0.92 kW h/L/d of electricity can be saved economically, which accentuated the potential for energy conservation. An in-depth analysis of the treated effluents from the ABBRs, using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) technique, uncovered four potential transformation pathways for IMI. Overall, our findings suggest that these optimized processes did not influence the transformation products of IMI, thereby reaffirming the viability of our proposed optimization.
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Affiliation(s)
- Yongtao Cheng
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, 130117, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China
| | - Linghui Quan
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China
| | - Ashiwin Vadiveloo
- Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch, WA, 6150, Australia
| | - Lie Yang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China
| | - Abdullah A Saber
- Botany Department, Faculty of Science, Ain Shams University, Abbassia Square, Cairo, 11566, Egypt
| | - Shubin Lan
- Key Laboratory of Vegetation Ecology of the Ministry of Education, Institute of Grassland Science/School of Environment, Northeast Normal University, Changchun, 130024, China
| | - Sara S A Alsaif
- Department of Botany and Microbiology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Zhaojun Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, 130117, China.
| | - Li Wu
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, 130117, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China.
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Nian K, Xiong W, Tao Y, Zhu Z, Pan X, Zhang K, Zhang X. An Insight into the Sorption Behavior of 2,3,7,8-Tetrachlorodibenzothiophene on the Sediments and Paddy Soil from Chaohu Lake Basin. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11346. [PMID: 36141619 PMCID: PMC9517350 DOI: 10.3390/ijerph191811346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/06/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
Considering the frequent detection of polychlorinated dibenzothiophenes (PCDTs) in various environmental matrices and the potential ecological health risks, the environmental behavior of such compounds needs to be elucidated further. In this work, the sorption behavior of 2,3,7,8-tetrachlorodibenzothiophene (2,3,7,8-TCDT) onto three sediments and paddy soil from Chaohu Lake were investigated via batch equilibration experiments. From the perspective of sorption kinetics and isotherms, the sorption characteristics and mechanism of 2,3,7,8-TCDT on the above four carriers were compared, and the relationship between their structural characteristics and soil sorption capacity was discussed. Results suggested that rapid sorption played the primary role during the sorption process of 2,3,7,8-TCDT and the corresponding sorption isotherms were well fitted using the Freundlich logarithmic model. Moreover, the effects of pH and dissolved organic matter (DOM) on the sorption of 2,3,7,8-TCDT were investigated. The maximum sorption capacity of 2,3,7,8-TCDT on sediment was under acidic pH condition (pH = 4.0). Meanwhile, DOM at a low level promoted the sorption capacity of sediment toward 2,3,7,8-TCDT, while the high concentration of DOM inhibited this effect. In addition, the values of logKoc were obtained using high-performance liquid chromatography (HPLC) and did not show any significant correlation with organic carbon (OC) contents, thereby indicating that the partition effect was the dominating influencing factor for the sorption of 2,3,7,8-TCDT both on sediments and soil. This work provides useful data to understand the sorption behavior of 2,3,7,8-TCDT on sediments and soil and assess its potential environmental risk.
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Affiliation(s)
- Kainan Nian
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
| | - Wenli Xiong
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
| | - Yalu Tao
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
| | - Ziqing Zhu
- China Science and Technology Intelligent Agricultural Valley Collaborative Innovation Research Institute, Hefei 231131, China
| | - Xiaoxue Pan
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
| | - Kang Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
| | - Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
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Nian K, Yang W, Zhang X, Zhang R, Xiong W, Crump D, Su G, Zhang X, Feng M, Shi J. Occurrence, partitioning, and bioaccumulation of an emerging class of PBT substances (polychlorinated diphenyl sulfides) in Chaohu Lake, Southeast China. WATER RESEARCH 2022; 218:118498. [PMID: 35489155 DOI: 10.1016/j.watres.2022.118498] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/10/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
Polychlorinated diphenyl sulfides (PCDPSs) represent an emerging group of constituents that are persistent, bioaccumulative and toxic (PBT) substances of great concern in terms of human health and ecological integrity. However, little is known about the occurrence, environmental behaviour and ecological risks of PCDPSs in lake environments. In this study, the concentrations of 21 PCDPSs were determined in surface water, suspended particulate matter (SPM), sediments, and 8 fish species from Chaohu Lake, China. Eighteen PCDPS congeners were prevalently detected in the samples, with concentrations ranging from 0.272-1.69 ng/L (water), 0.477-2.03 ng/g d.w. (SPM), 0.719-4.07 ng/g d.w. (sediment) and 0-0.131 ng/g w.w. (fish), respectively. Medium- and high-chlorinated PCDPSs in SPM and sediment were significantly higher than those in water samples. Increased PCDPS concentrations were found in higher trophic level fishes and those with a demersal habitat preference, indicating their bioaccumulation and biomagnification potential. The logBCFs, BSSAFs, and BSAFs of PCDPS congeners in fishes were determined to be 3.91-5.18, 0.0500-2.33, and 0.0360-4.94 L/kg, respectively. The organic carbon normalized partition coefficients (logKoc) of PCDPSs in surface water-SPM (4.61-5.54 L/g) and surface water-sediment (4.38-5.69 L/g) systems were determined, and it was found that highly chlorinated PCDPSs were more prone to migrate from water to sediment and SPM. The toxic equivalent (TEQ) values of PCDPSs in the samples (lower than 10-1 pg/g or pg/L) and daily intake via fish consumption (0.180-0.340 μg/kg/day) were estimated for humans, and cumulative risk quotients (RQs) after correction at ten sampling sites (0.065-0.66) were calculated for green algae. The findings elucidated the environmental behaviour of PCDPSs in Chaohu Lake.
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Affiliation(s)
- Kainan Nian
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui 230601, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, Anhui 230601, China
| | - Wenhui Yang
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui 230601, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, Anhui 230601, China
| | - Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui 230601, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, Anhui 230601, China.
| | - Rui Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China.
| | - Wenli Xiong
- School of Resources and Environmental Engineering, Anhui University, Hefei, Anhui 230601, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, Anhui 230601, China
| | - Doug Crump
- Ecotoxicology and Wildlife Health Division, Environment and Climate Change Canada, National Wildlife Research Centre, Carleton University, 1125 Colonel By Drive, Ottawa K1A 0H3, Canada
| | - Guanyong Su
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiaowei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Mingbao Feng
- College of Environment & Ecology, Xiamen University, Xiamen, China
| | - Jiaqi Shi
- Nanjing Institute of Environmental Sciences of the Ministry of Ecology and Environment, Nanjing, Jiangsu 210042, China.
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