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Mwangi JK, Degrendele C, Bandowe BAM, Bohlin-Nizzetto P, Halse AK, Šmejkalová AH, Kim JT, Kukučka P, Martiník J, Nežiková BP, Přibylová P, Prokeš R, Sáňka M, Tannous M, Vinkler J, Lammel G. Air-soil cycling of oxygenated, nitrated and parent polycyclic aromatic hydrocarbons in source and receptor areas. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 921:170495. [PMID: 38296070 DOI: 10.1016/j.scitotenv.2024.170495] [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: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) and their oxygenated and nitrated derivatives, OPAHs and NPAHs, are semivolatile air pollutants which are distributed and cycling regionally. Subsequent to atmospheric deposition to and accumulation in soils they may re-volatilise, a secondary source which is understudied. We studied the direction of air-soil mass exchange fluxes of 12 OPAHs, 17 NPAHs, 25 PAHs and one alkylated PAH in two rural environments being influenced by the pollutant concentrations in soil and air, by season, and by land cover. The OPAHs and NPAHs in samples of topsoil, of ambient air particulate and gas phases and in the gas-phase equilibrated with soil were analysed by GC-APCI-MS/MS. The pollutants soil burdens show a pronounced seasonality, a winter maximum for NPAHs and PAHs and a summer maximum for OPAHs. One order of magnitude more OPAH and parent PAH are found stored in forest soil than in nearby grassland soil. Among a number of 3-4 ring PAHs, the OPAHs benzanthrone and 6H-benzo(c,d)pyren-6-one, and the NPAHs 1- and 2-nitronaphthalene, 9-nitrophenanthrene and 7-nitrobenz(a)anthracene are found to re-volatilise from soils at a rural background site in central Europe in summer. At a receptor site in northern Europe, net deposition of polycyclic aromatic compounds (PACs) prevails and re-volatilisation occurs only sporadic. Re-volatilisation of a number of PACs, including strong mutagens, from soils in summer and even in winter indicates that long-range atmospheric transport of primary PAC emissions from central Europe to receptor areas might be enhanced by secondary emissions from soils.
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Affiliation(s)
- John K Mwangi
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | - Céline Degrendele
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | - Benjamin A M Bandowe
- Max Planck Institute for Chemistry, Multiphase Chemistry Department, Mainz, Germany
| | | | - Anne K Halse
- Norwegian Institute for Air Research (NILU), Kjeller, Norway
| | | | - Jun-Tae Kim
- Max Planck Institute for Chemistry, Multiphase Chemistry Department, Mainz, Germany; Korea Institute of Science and Technology, Center for Sustainable Environment Research, Seoul, Republic of Korea
| | - Petr Kukučka
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | - Jakub Martiník
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | | | - Petra Přibylová
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | - Roman Prokeš
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic; Czech Academy of Sciences, Global Change Research Institute, Brno, Czech Republic
| | - Milan Sáňka
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | - Mariam Tannous
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | - Jakub Vinkler
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic
| | - Gerhard Lammel
- Masaryk University, Faculty of Science, RECETOX, Kotlářská 2, 61137 Brno, Czech Republic; Max Planck Institute for Chemistry, Multiphase Chemistry Department, Mainz, Germany.
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2
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Kong X, Zhou A, Chen X, Cheng X, Lai Y, Li C, Ji Q, Ji Q, Kong J, Ding Y, Zhu F, He H. Insight into the adsorption behaviors and bioaccessibility of three altered microplastics through three types of advanced oxidation processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170420. [PMID: 38301781 DOI: 10.1016/j.scitotenv.2024.170420] [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: 11/22/2023] [Revised: 01/10/2024] [Accepted: 01/22/2024] [Indexed: 02/03/2024]
Abstract
Advanced oxidation processes (AOPs) can significantly alter the structural properties, environmental behaviors and human exposure level of microplastics in aquatic environments. Three typical microplastics (Polyethylene (PE), polypropylene (PP), and polystyrene (PS)) and three AOPs (Heat-K2S2O8 (PDS), UV-H2O2, UV-peracetic acid (PAA)) were adopted to simulate the process when microplastics exposed to the sewage disposal system. 2-Nitrofluorene (2-NFlu) adsorption experiments found the equilibrium time decreased to 24 hours and the capacity increased up to 610 μg g-1, which means the adsorption efficiency has been greatly improved. The fitting results indicate the adsorption mechanism shifted from the partition dominant on pristine microplastic to the physical adsorption (pore filling) dominant. The alteration of specific surface area (21 to 152 m2 g-1), pore volume (0.003 to 0.148 cm3 g-1) and the particle size (123 to 16 μm) of microplastics after AOPs are implying the improvement for pore filling. Besides, the investigation of bioaccessibility is more complex, AOPs alter microplastic with more oxygen-containing functional groups and lower hydrophobicity detected by XPS and water contact angle, those modifications have increased the sorption concentration, especially in the human intestinal tract. Therefore, this indicates the actual exposure of organic compounds loaded in microplastic may be higher than in the pristine microplastic. This study can help to assess the human health risk of microplastic pollution in actual environments.
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Affiliation(s)
- Xiangcheng Kong
- College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China; School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Aoyu Zhou
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Xianxian Chen
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Xinying Cheng
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Yuqi Lai
- College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Chao Li
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Qiuyi Ji
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Qingsong Ji
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Jijie Kong
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China
| | - Yuan Ding
- College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
| | - Fengxiao Zhu
- College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Huan He
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, PR China; College of Ecological and Resource Engineering, Fujian Provincial Key laboratory of Eco-Industrial Green Technology, Wuyi University, Wuyishan, Fujian 354300, PR China.
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Zhang Y, Cheng X, Chen X, Ding L, Xiao H, Liu K, Yang S, Li H, He H. Interannual variation and machine learning simulation of organophosphate esters in Taihu Lake. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132654. [PMID: 37788554 DOI: 10.1016/j.jhazmat.2023.132654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 09/13/2023] [Accepted: 09/26/2023] [Indexed: 10/05/2023]
Abstract
Organophosphate esters (OPEs) are widespread in water bodies and have attracted public attention due to their hazards. This study investigated the presence of OPEs in surface water of Taihu Lake from 2012 and 2021-2022. The OPEs concentration was compared ten years ago and ten years later. Water and meteorological parameters were ranked using the random forest (RF) model, and OPEs concentration in lakes was simulated using selected parameters as inputs. The concentration of Σ7OPEs was higher ten years ago compared to ten years later. There was no significant seasonal difference in Σ7OPEs from 2021-2022, while the concentration of Σ7OPEs in 2012 was lower in summer than in other seasons. The spatial distribution of the two interannual Σ7OPEs exhibited a decreasing trend from the northwest region. The results of RF importance ranking and redundancy analysis showed that NH3-N, TN, TP, water temperature and relative humidity were the most influential factors affecting OPEs concentrations. RF models performed better for TnBP, as indicated by training R and test R values are excellent and relatively low errors. Our results demonstrated that machine learning models were useful in facilitating efficient monitoring and assessment of OPEs contamination in lakes.
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Affiliation(s)
- Yuteng Zhang
- School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Xinying Cheng
- School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Xianxian Chen
- School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Lei Ding
- College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
| | - Hui Xiao
- School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Kai Liu
- School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Shaogui Yang
- School of Environment, Nanjing Normal University, Nanjing 210023, China
| | - Huiming Li
- School of Environment, Nanjing Normal University, Nanjing 210023, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing 210023, China.
| | - Huan He
- School of Environment, Nanjing Normal University, Nanjing 210023, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing 210023, China.
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Zhang L, Ma Y, Cai M, Zhong Y, Zhang Z, Li S. Chemodynamics of Polycyclic Aromatic Hydrocarbons and Their Alkylated and Nitrated Derivatives in the Yellow Sea and East China Sea. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:20292-20303. [PMID: 37867381 DOI: 10.1021/acs.est.3c07476] [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: 10/24/2023]
Abstract
The occurrence of continuously released polycyclic aromatic hydrocarbons (PAHs) in marginal seas is regulated by hydrological and biogeochemical processes; however, scarce knowledge is about their derivatives in marine environments. In this study, the dissolved and particulate PAHs and their alkylated/nitrated derivatives (A-PAHs/N-PAHs) in surface seawater of the southwestern Yellow Sea (YS) and northwestern East China Sea (ECS) during September 2022 were comprehensively discussed. Results confirm higher levels of Σ26PAHs (9.3-70 ng/L) and Σ43A-PAHs (13-76 ng/L) than Σ20N-PAHs (0.80-6.6 ng/L). The spatial heterogeneity of contaminants was regulated by substantial riverine runoff and ocean currents. Lagrangian Coherent Structure analysis further revealed the existence of a transport barrier at the shelf break of the southwestern YS where contaminants hardly crossed and tended to accumulate. The relationship between dissolved compounds and chlorophyll a indicated both biodegradation and the biological pump contributed to the depletion of PAHs and A-PAHs from surface seawater while the biological pump was the major driver for N-PAHs, despite their complicated water-particle partition behavior due to variations in physicochemical properties in the presence of nitro groups. Source identification demonstrated that pyrogenic and petrogenic sources dominated the YS and ECS, respectively, while photochemical transformations appeared more active in the YS.
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Affiliation(s)
- Lihong Zhang
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yuxin Ma
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
- Key Laboratory of Polar Science, Ministry of Natural Resources, Polar Research Institute of China, Shanghai 200136, China
| | - Minghong Cai
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
- Key Laboratory of Polar Science, Ministry of Natural Resources, Polar Research Institute of China, Shanghai 200136, China
| | - Yisen Zhong
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Zhiwei Zhang
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Shuangzhao Li
- School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
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Gu Y, Xu H, Feng R, Zhang B, Gao M, Sun J, Shen Z, Qu L, Ho SSH, Cao J. Insight into personal exposure characteristics and health effects of PM 2.5 and PM 0.25-bound PAHs and their derivatives with different heating ways in the Fenwei Plain, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 338:122699. [PMID: 37802290 DOI: 10.1016/j.envpol.2023.122699] [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: 06/05/2023] [Revised: 10/03/2023] [Accepted: 10/04/2023] [Indexed: 10/08/2023]
Abstract
Personal exposure (PE) to polycyclic aromatic hydrocarbons (PAHs) and their derivatives in particulate matter with two aerodynamic sizes of 2.5 and 0.25 μm (PM2.5 and PM0.25) from rural housewives was studied in the Fenwei Plain, China. A total of 15 households were divided into five different groups based on the type of solid fuel and heating device used, including biomass briquette-furnace (BBF), biomass-elevated Kang (BEK), outdoor lump coal-boiler (OLC), indoor briquette coal-stove (IBC), and electricity (ELE). The PE concentrations of the PAHs and biomarkers in urine collected from the participants were determined. The results showed that the PE concentrations of total quantified PAHs in the biomass group (i.e., BBF and BEK) were 2.2 and 2.0 times higher than those in the coal groups (i.e., OLC and IBC) in PM2.5 and PM0.25, respectively. The housewives who used biomass as fuel suffered from higher potential health impacts than the coal fuel users. The incremental lifetime cancer risk for the PAHs in PM2.5 in the BBF and BEK groups exceeded the international safety threshold. Furthermore, the PE concentrations of oxygenated PAH (o-PAHs) in PM2.5 and PM0.25 in the biomass groups and the nitrated PAHs (n-PAHs) in PM0.25 in the coal groups showed strong correlations with the biomarkers. The results of this study proved the associations between exposure to the different classes of PAHs and health hazards. The findings could also serve as a guideline in establishing efficient measures for using solid fuels for cooking and household warming in northern China.
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Affiliation(s)
- Yunxuan Gu
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Hongmei Xu
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; SKLLQG, Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China.
| | - Rong Feng
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Bin Zhang
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Min Gao
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Shaanxi Provincial Academy of Environmental Science, Xi'an, 710061, China
| | - Jian Sun
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zhenxing Shen
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; SKLLQG, Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China
| | - Linli Qu
- Hong Kong Premium Services and Research Laboratory, Kowloon, Hong Kong SAR, China
| | - Steven Sai Hang Ho
- Division of Atmospheric Sciences, Desert Research Institute, Reno, NV89512, United States
| | - Junji Cao
- SKLLQG, Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China
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Ma T, Kong J, Li W, Cheng X, Zhang Y, Kong D, Yang S, Li S, Zhang L, He H. Inventory, source and health risk assessment of nitrated and parent PAHs in agricultural soils over a rural river in Southeast China. CHEMOSPHERE 2023; 329:138688. [PMID: 37059199 DOI: 10.1016/j.chemosphere.2023.138688] [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: 11/14/2022] [Revised: 04/05/2023] [Accepted: 04/12/2023] [Indexed: 05/03/2023]
Abstract
Nitrated polycyclic aromatic hydrocarbons (NPAHs) have become a concerning topic because of their widespread occurrence and carcinogenicity. However, studies on NPAHs in soils, especially in agricultural soils, are still limited. In this study, a systematic monitoring campaign of 15 NPAHs and 16 polycyclic aromatic hydrocarbons (PAHs) was performed in agricultural soils from the Taige Canal basin in 2018, which is a typical agricultural activity area of the Yangtze River Delta. The total concentration of NPAHs and PAHs ranged from 14.4 to 85.5 ng g-1 and 118-1108 ng g-1, respectively. Among the target analytes, 1,8-dinitropyrene and fluoranthene were the most predominant congeners accounting for 35.0% of ∑15NPAHs and 17.2% of ∑16PAHs, respectively. Four-ring NPAHs and PAHs were predominant, followed by three-ring NPAHs and PAHs. NPAHs and PAHs had a similar spatial distribution pattern with high concentrations in the northeastern Taige Canal basin. The soil mass inventory of ∑16PAHs and ∑15NPAHs was evaluated to be 31.7 and 2.55 metric tons, respectively. Total organic carbon had a significant impact on the distribution of PAHs in soils. The correlation between PAH congeners in agricultural soils was higher than that between NPAH congeners. Based on diagnostic ratios and principal component analysis-multiple linear regression model, vehicle exhaust emission, coal combustion, and biomass combustion were the predominant sources of these NPAHs and PAHs. According to the lifetime incremental carcinogenic risk model, the health risk posed by NPAHs and PAHs in agricultural soils of the Taige Canal basin was virtually negligible. The total health risk in soils of the Taige Canal basin to adults was slightly higher than that to children.
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Affiliation(s)
- Tao Ma
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China; Nanjing Institute of Environmental Sciences, Ministry of Environment and Ecology of China, Nanjing, 210042, PR China; School of Energy and Environment, Southeast University, Nanjing, 210096, PR China
| | - Jijie Kong
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China; School of Geography, Nanjing Normal University, Nanjing, 210023, PR China
| | - Weidi Li
- Jiangsu Key Laboratory of Environmental Engineering, Jiangsu Provincial Academy of Environmental Science, Nanjing, 210036, PR China
| | - Xinying Cheng
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China
| | - Yueqing Zhang
- Nanjing Institute of Environmental Sciences, Ministry of Environment and Ecology of China, Nanjing, 210042, PR China
| | - Deyang Kong
- Nanjing Institute of Environmental Sciences, Ministry of Environment and Ecology of China, Nanjing, 210042, PR China.
| | - Shaogui Yang
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China
| | - Shiyin Li
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China
| | - Limin Zhang
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China; Green Economy Development Institute, Nanjing University of Finance and Economics, Nanjing, Jiangsu, 210023, PR China
| | - Huan He
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China; College of Ecological and Resource Engineering, Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University, Wuyishan, 354300, PR China.
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Zhao K, Peng G, Wang K, Li F. Distribution, sources, and health risk of polycyclic aromatic hydrocarbons and their derivatives in the watershed: the case of Yitong River, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:68536-68547. [PMID: 37126174 DOI: 10.1007/s11356-023-27042-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 04/11/2023] [Indexed: 05/27/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) and substituted PAHs (SPAHs) are persistent organic pollutants prevalent globally, and SPAHs have received widespread attention in recent years due to their stronger toxicity and carcinogenicity compared to PAHs. There is a lack of systematic examination of PAHs and their derivatives in watersheds. Thus, to clarify the current status, possible sources, and potential risks of PAHs and their derivatives in watersheds, a study was conducted on Yitong River in China. The results showed that the concentrations of ∑PAHs, ∑OPAHs, and ∑NPAHs ranged from 297.9-1158.3 ng/L, 281.1-587.2 ng/L, and 65.7-269.1 ng/L, respectively. Diagnostic ratio analysis showed that the PAHs were mainly derived from petroleum sources, agricultural waste, and coal combustion. Nitrated PAHs (NPAHs) were mainly derived from liquid combustion sources, and oxygenated PAHs (OPAHs) were derived mainly from petroleum source emissions and atmospheric deposition. The exposure risk model of PAHs revealed that 86% of the studied sites would pose carcinogenic risks after dermal contact. The contaminant causing a major carcinogenic risk was DahA, and none of the sites produced non-carcinogenic risks. The lifetime carcinogenic risk of NPAHs was 8.85 × 10-10-1.44 × 10-4, and some surface waters presented with potential carcinogenic risks.
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Affiliation(s)
- Ke Zhao
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, 5088 Xincheng Street, Changchun, 130118, People's Republic of China
| | - Guosong Peng
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, 5088 Xincheng Street, Changchun, 130118, People's Republic of China
| | - Kaixuan Wang
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, 5088 Xincheng Street, Changchun, 130118, People's Republic of China
| | - Fengxiang Li
- Key Laboratory of Pollution Processes and Environmental Criteria at Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
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Su Y, Ren Q, Zhang WY, Chen F. Computational Studies on the Reactivity of Polycyclic Aromatic Hydrocarbons. Chemphyschem 2023; 24:e202200638. [PMID: 36409286 DOI: 10.1002/cphc.202200638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 11/15/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are widely present in the environment as toxic pollutants. In this study, quantum chemistry methods are used to study reactions of PAHs in both particle and gas phases. Seven theoretical methods are exploited to predict the reactive sites of 15 PAHs in the particle phase. Among these methods, the performance of the condensed Fukui function (CFF) is optimum. The gas-phase reactions of eight PAHs are also investigated. Except for fluorene, CFF predicts correctly the gas-phase mono-nitro products for seven systems. The products of fluorene predicted by CFF are 1-nitrofluorene and 3-nitrofluorene, which is however inconsistent with the experimental results. Transition state theory is then used to investigate the reaction mechanism of fluorene. Calculated rate constants for 3-nitrofluorene and 2-nitrofluorene formation are much bigger than that for 1-nitrofluorene formation, which is in agreement with the experimental results.
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Affiliation(s)
- Yingwei Su
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Beijing, 100083, China
| | - Qing Ren
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Beijing, 100083, China
| | - Wen-Yan Zhang
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Beijing, 100083, China
| | - Feiwu Chen
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Beijing, 100083, China
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Kong J, Han M, Cao X, Cheng X, Yang S, Li S, Sun C, He H. Sedimentary spatial variation, source identification and ecological risk assessment of parent, nitrated and oxygenated polycyclic aromatic hydrocarbons in a large shallow lake in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 863:160926. [PMID: 36543273 DOI: 10.1016/j.scitotenv.2022.160926] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/09/2022] [Accepted: 12/10/2022] [Indexed: 05/16/2023]
Abstract
Because polycyclic aromatic compounds (PACs) are persistent, universal, and toxic pollutants, understanding the potential source and ecological risk thereof in lakes is critical to the safety of the aquatic environment. Here, a total of 25 sedimentary samples were collected from Lake Taihu, China, in 2018. The total concentrations of 16 parent polycyclic aromatic hydrocarbons (PAHs), 15 nitrated PAHs (NPAHs), nine oxygenated PAHs (OPAHs), and five hydroxy-PAHs (OH-PAHs) ranged from 294 to 1243, 3.0 to 54.5, 188 to 1897, and 8.3 to 51.7 ng/g dw, with the most abundant compounds being fluoranthene, 1,8-dinitropyrene, 6H-Benzo[cd]pyren-6-one, and 2-phenylphenol, respectively. The spatial distribution of PACs in sediments of Lake Taihu showed elevated concentrations from east to west due to economic development and transportation. The positive correlations between most paired PAHs indicate that these compounds likely originated from similar sources. The total organic carbon and organic matter contents affected the distribution characteristics of PACs in sediments. Diagnostic ratios, principal component analysis-multiple linear regression (PCA-MLR), and positive matrix factorization (PMF) were integrated to identify the sources. PACs had various sources including combustion, petroleum leakage, traffic emissions, hydroxyl metabolism, and other oxidation pathways in sediments of Lake Taihu. The PMF (R2 > 0.9824), which showed better optimal performance compared with PCA-MLR (R2 > 0.9564) for PAHs and derivatives, is recommended as the preferred model for quantitative source analysis. Ecological risk assessment showed that the risk quotient values of OPAHs in sediments were much higher than those of other PACs and should be given special attention.
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Affiliation(s)
- Jijie Kong
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, China; School of Geography, Nanjing Normal University, Nanjing 210023, China; The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Mengshu Han
- The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Key Laboratory of Information and Computing Science Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Xiaoyu Cao
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, China
| | - Xinying Cheng
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, China
| | - Shaogui Yang
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, China
| | - Shiyin Li
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, China
| | - Cheng Sun
- The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Huan He
- School of Environment, Nanjing Normal University, Jiangsu Engineering Lab of Water and Soil Eco-Remediation, Nanjing 210023, China; College of Ecological and Resource Engineering, Fujian Provincial Key laboratory of Eco-Industrial Green Technology, Wuyi University, Wuyishan 354300, PR China.
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10
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Gu S, Cui J, Liu F, Chen J. Biochar loaded with cobalt ferrate activated persulfate to degrade naphthalene. RSC Adv 2023; 13:5283-5292. [PMID: 36777931 PMCID: PMC9912118 DOI: 10.1039/d2ra08120b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
Considering the simple preparation of biochar and the excellent activation performance of cobalt ferrate material, a biochar supported cobalt ferrate composite was synthesized by a solvothermal method. The material was used to activate persulfate (PS) to degrade naphthalene (NAP) in water. The structure and morphology characterization showed that the composite (CoFe2O4-BC) was successfully prepared. Under the conditions of 0.25 g L-1 CoFe2O4-BC and 1 mM PS, 90.6% NAP (the initial concentration was 0.1 mM) was degraded after 30 minutes. The degradation kinetics of NAP followed the pseudo-first-order kinetic model with a rate constant of 0.0645 min-1. With the increase of the dosage of activator and PS, the removal rate of NAP could be increased to 99.5%. The coexistence of anions and humic acids inhibited the removal of NAP. The acid environment promoted the removal of NAP while the alkaline environment inhibited it. After four cycles of CoFe2O4-BC material, the removal rate of NAP decreased from 90.6% to 79.4%. The removal of TOC was about 45% after each cycle. After the first cycle, the concentration of leached cobalt ion and leached iron ion was about 310 μg L-1 and 30 μg L-1 respectively. The free radical quenching experiments showed that SO4 -˙ and OH˙ were the main causes of NAP removal, and the possible degradation path of NAP was elucidated by DFT calculation.
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Affiliation(s)
- Shuaijie Gu
- School of Environmental and Chemical Engineering, Shanghai University 99 Shangda Road Shanghai 200444 PR China
| | - Jingying Cui
- School of Environmental and Chemical Engineering, Shanghai University 99 Shangda Road Shanghai 200444 PR China
| | - Fangqin Liu
- School of Environmental and Chemical Engineering, Shanghai University 99 Shangda Road Shanghai 200444 PR China
| | - Jinyang Chen
- School of Environmental and Chemical Engineering, Shanghai University 99 Shangda Road Shanghai 200444 PR China
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11
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Shang N, Wang C, Kong J, Yu H, Li J, Hao W, Huang T, Yang H, He H, Huang C. Dissolved polycyclic aromatic hydrocarbons (PAHs-d) in response to hydrology variation and anthropogenic activities in the Yangtze River, China. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 326:116673. [PMID: 36375425 DOI: 10.1016/j.jenvman.2022.116673] [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: 07/13/2022] [Revised: 10/10/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Owing to their bioavailability and toxicity, the dissolved polycyclic aromatic hydrocarbons (PAHs-d) loaded in rivers are harmful to both inland and marine ecosystems. Thus, exploring the changes in PAHs-d levels and sources is important for controlling PAHs pollution. In this study, the concentration of PAHs-d in the mainstream of the Yangtze River during dry and wet seasons was investigated and the source was analyzed using the positive matrix factorization (PMF) model to assess the response of PAHs-d to hydrological and anthropogenic activities changes. The concentration of PAHs-d in the wet season (166.2 ± 52.51 ng/L) was significantly higher than that in the dry season (89.05 ± 20.89 ng/L) (ANOVA, P < 0.001), and the sampling sites with high pollution were mainly distributed in the downstream urban agglomeration. Herein, 2-3 rings were identified to play a dominant role in the composition of PAHs-d. Compared with the dry season, the proportion of the low molecular weight (LMW) PAHs-d were relatively depleted and the high molecular weight (HMW) PAHs-d were accumulated in the wet season. Coal and coke combustion were identified as the main sources of PAHs-d (65.9% in the dry season and 59.2% in the wet season), followed by vehicle emissions, petroleum sources, and biomass combustion. Owing to the change in energy consumption structure and climate characteristics, the sources of PAHs-d displayed seasonal variation and spatial heterogeneity. Further, flow was identified as the most important factor affecting PAHs-d in the hydrological parameters. Increases of flow, pH, and SPM decreased the proportion of LMW PAHs-d, and increased that of HMW PAHs-d. The increase in anthropogenic activities intensified the residual levels of 2-3rings and 5-6 rings in water, but had no significant impact on the levels of 4 rings.
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Affiliation(s)
- Nana Shang
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China
| | - Chuan Wang
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China
| | - Jijie Kong
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China; School of Environment, Nanjing Normal University, Nanjing, 210023, PR China; The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Heyu Yu
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China
| | - Jianhong Li
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China
| | - Weiyue Hao
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China
| | - Tao Huang
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing, 210023, China.
| | - Hao Yang
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing, 210023, China
| | - Huan He
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China; Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, College of Ecological and Resource Engineering, Wuyi University, Wuyishan, 354300, China
| | - Changchun Huang
- School of Geography, Nanjing Normal University, Nanjing, 210023, PR China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing, 210023, China; Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing, 210023, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210023, China
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12
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Zhang J, Wang K, Guo J, Huang Y, Wei Y, Jia K, Peng Y, Lu H. Study on the mechanism of liver toxicity induced by acenaphthene in zebrafish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114441. [PMID: 38321660 DOI: 10.1016/j.ecoenv.2022.114441] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 12/10/2022] [Accepted: 12/14/2022] [Indexed: 02/08/2024]
Abstract
Acenaphthene is a polycyclic aromatic hydrocarbon (PAH) that is a widely distributed environmental pollutant that accumulates in organisms and leads to health risks in humans. Although acenaphthene is reported to be toxic to aquatic organisms, its effects of acenaphthene on the livers of these organisms have not been evaluated. Here, zebrafish were used as an experimental model. Zebrafish larvae were exposed to 4.5, 5.5, and 6.5 mg/L acenaphthene for 72 h while adult zebrafish were exposed to 1.5, 2, and 2.5 mg/L acenaphthene for 28 days. We investigated the mechanism by which acenaphthene causes liver toxicity in zebrafish. The results showed that acenaphthene affected the early development of zebrafish and led to mitochondrial damage by promoting the production of reactive oxygen species (ROS) resulting in oxidative stress. The expression of genes related to inflammation and apoptosis was analyzed, observing up-regulation of the pro-inflammatory factors IL-8, TNF-α, and IL-6. The pro-apoptotic genes p53, Caspase-3, and Bax and the Bax/Bcl-2 ratio were up-regulated, while the anti-apoptotic gene Bcl-2 was down-regulated. In addition, we investigated the effects of acenaphthene on liver metabolism. When exposed to acenaphthene, the glycogen content of the liver decreased, while lipid accumulation increased together with alterations in related indicators of liver metabolism. In conclusion, acenaphthene induced oxidative stress through ROS production, leading to mitochondrial damage and activation of pathways associated with inflammation and apoptosis, resulting in hepatotoxicity. This affects normal liver metabolism. Our results revealed the mechanism of hepatotoxicity in zebrafish acenaphthene, and provided new evidence for a more comprehensive understanding of the hepatotoxicity of acenaphthene.
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Affiliation(s)
- June Zhang
- College of Life Sciences, Jiangxi Normal university, Nanchang, Jiangxi, China.
| | - Kexin Wang
- College of Life Sciences, Jiangxi Normal university, Nanchang, Jiangxi, China
| | - Jing Guo
- College of Life Sciences, Jiangxi Normal university, Nanchang, Jiangxi, China
| | - Yong Huang
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, China
| | - You Wei
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Kun Jia
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Yuan Peng
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Huiqiang Lu
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China.
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13
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Wu J, Xu G, Xia F, Liu X, Zheng L. Comparison of the sensitivity between indigenous and exotic aquatic species for fluoranthene and derivation of water quality criteria (WQC). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:7617-7624. [PMID: 36044141 DOI: 10.1007/s11356-022-22755-w] [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: 05/23/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Fluoranthene (FLU) has shown relatively high toxicity to aquatic life as a priority polycyclic aromatic hydrocarbon (PAH). Considering the toxic effects of FLU on aquatic organisms and its high detection frequency in the aquatic environment, it is necessary and critical to derive FLU water quality criteria (WQC) for the protection of aquatic organisms and ecological risk assessment. However, due to the lack of toxicity data at different classification levels, there has been no research about the WQC of FLU. In this study, nine acute and three chronic toxicity tests were carried out on 9 Chinese indigenous aquatic species from different classification levels to obtain toxicity data. According to the US EPA guidelines, the criterion maximum concentration of 0.570 mg/L and the criterion continuous concentration of 0.174 mg/L were developed. There is no significant difference when comparing the species sensitivity distributions between indigenous and exotic species. Therefore, it is possible to use toxicity data from organisms in different areas for ecological risk assessment of FLU. CAPSULE: We compared the sensitivity between indigenous and exotic aquatic species for fluoranthene and derived its water quality criteria.
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Affiliation(s)
- Jiangyue Wu
- National Marine Hazard Mitigation Service, Ministry of Natural Resources of the People's Republic of China, Beijing, 100194, China
| | - Guodong Xu
- National Marine Hazard Mitigation Service, Ministry of Natural Resources of the People's Republic of China, Beijing, 100194, China
| | - Fang Xia
- School of Land Science and Technology, China University of Geosciences, Beijing, 100083, China
| | - Xunan Liu
- National Marine Hazard Mitigation Service, Ministry of Natural Resources of the People's Republic of China, Beijing, 100194, China
| | - Lei Zheng
- State Environmental Protection Key Laboratory of Dioxin Pollution, National Research Center of Environmental Analysis and Measurement, Sino-Japan Friendship Centre for Environmental Protection, Beijing, 100029, China.
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14
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Mohammed R, Zhang ZF, Hu YH, Jiang C, He ZQ, Wang WJ, Li YF. Temporal-spatial variation, source forensics of PAHs and their derivatives in sediment from Songhua River, Northeastern China. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2022; 44:4031-4043. [PMID: 34820731 DOI: 10.1007/s10653-021-01106-7] [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: 03/08/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
The distribution patterns and health risk assessment of nitrated polycyclic aromatic hydrocarbons (NPAHs), hydroxy polycyclic aromatic hydrocarbons (OH-PAHs), and regular 16 priority polycyclic aromatic hydrocarbons (PAHs) in sediment from the Songhua River in northeastern China were investigated in this research. During dry seasons, concentrations of 16 USEPA priority PAHs, OH-PAHs, and NPAHs were extremely high, with average values of 1220 ± 288, 317 ± 641, 2.54 ± 3.98, and 12.2 ± 22.1 ng/g (dry weight, dw). The dry period level was confirmed to be 4 times greater than the wet period concentration. Modeling with positive matrix factorization (PMF) and estimation of diagnostic isomeric ratios were applied for identifying sources, according to the positive matrix factorization model: vehicle emissions (38.1%), biomass burning (25%), petroleum source (23.4%), and diesel engines source (13.5%) in wet season as well as wood combustion (44.1%), vehicle source (40.2%), coke oven (10.8%), and biomass burning (4.9%) in the dry season. The greatest seasonal variability was attributed to high molecular weight compounds (HMW PAHs). BaP was confirmed to be 81% carcinogenic in this study, which offers convincing proof of the escalating health issues.
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Affiliation(s)
- Rashid Mohammed
- State Key Laboratory of Urban Water Resource and Environment, International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Harbin Institute of Technology, Harbin, 150090, Heilongjiang, China
- International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), Harbin Institute of Technology, Polar Academy, Harbin, 150090, China
- Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem (HPKL-PEE), Harbin Institute of Technology (HIT), Harbin, 150090, China
| | - Zi-Feng Zhang
- State Key Laboratory of Urban Water Resource and Environment, International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Harbin Institute of Technology, Harbin, 150090, Heilongjiang, China.
- International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), Harbin Institute of Technology, Polar Academy, Harbin, 150090, China.
- Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem (HPKL-PEE), Harbin Institute of Technology (HIT), Harbin, 150090, China.
| | - Ying-Hua Hu
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Heilongjiang Institute of Labor Hygiene and Occupational Diseases, Harbin, 150028, China
| | - Chao Jiang
- International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Heilongjiang Institute of Labor Hygiene and Occupational Diseases, Harbin, 150028, China
| | - Zhi-Qiang He
- Heilongjiang Pony Testing Technical Co.,Ltd, Harbin, 150028, Heilongjiang, China
| | - Wen-Juan Wang
- Heilongjiang Pony Testing Technical Co.,Ltd, Harbin, 150028, Heilongjiang, China
| | - Yi-Fan Li
- State Key Laboratory of Urban Water Resource and Environment, International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Harbin Institute of Technology, Harbin, 150090, Heilongjiang, China
- International Joint Research Center for Arctic Environment and Ecosystem (IJRC-AEE), Harbin Institute of Technology, Polar Academy, Harbin, 150090, China
- Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem (HPKL-PEE), Harbin Institute of Technology (HIT), Harbin, 150090, China
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15
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Chen X, Wang P, Peng F, Zhou Z, Waigi MG, Ling W. Ce(Ⅲ) activates peroxymonosulfate for the degradation of substituted PAHs. CHEMOSPHERE 2022; 306:135525. [PMID: 35779682 DOI: 10.1016/j.chemosphere.2022.135525] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/16/2022] [Accepted: 06/25/2022] [Indexed: 06/15/2023]
Abstract
Substituted polycyclic aromatic hydrocarbons (SPAHs) are being intensively investigated, considering their high toxicity. Additionally, the mechanism of the effect of substituents on the removal of SPAHs and the activation of Ce(III) ions on peroxymonosulfate (PMS) have not been explored. Here we evaluated the removal efficiency of SPAHs in the oxidation system constructed by Ce(Ⅲ) ions and PMS, with emphasized the effect of substituents on SPAHs degradation. Ce(Ⅲ) has high catalytic performance for PMS, and the degradation percentage of all pollutants was higher than 92%. The significantly negative correlation between the reaction rate constants of SPAHs and the highest occupied molecular orbital-the lowest unoccupied molecular orbital gap, confirms that substituents lead to the differences in the degradation of SPAHs. The generation of reactive oxygen species (SO4•-, •OH, and 1O2) is based on the electron transfer between Ce(Ⅲ) and PMS, and the contribution of ROS to substituted naphthalene varies due to the role of substituents. The Ce(Ⅳ)/Ce(Ⅲ) cycle accelerates the activation of PMS. Based on the transformation products and condensed Fukui function, the possible degradation pathways are inferred. In addition, inorganic anions and organic matter have little effect on the Ce(Ⅲ)/PMS system, which is a prerequisite for applying this system to real-world waste-water for SPAHs removal. This work demonstrates a new model of the degradation mechanism of SPAHs in the Ce(Ⅲ)/PMS system.
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Affiliation(s)
- Xuwen Chen
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Peixin Wang
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fei Peng
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhou Zhou
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Michael Gatheru Waigi
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wanting Ling
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
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16
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Medeiros DCCDS, Chelme-Ayala P, Benally C, Al-Anzi BS, Gamal El-Din M. Review on carbon-based adsorbents from organic feedstocks for removal of organic contaminants from oil and gas industry process water: Production, adsorption performance and research gaps. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 320:115739. [PMID: 35932737 DOI: 10.1016/j.jenvman.2022.115739] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/01/2022] [Accepted: 07/09/2022] [Indexed: 06/15/2023]
Abstract
Large amounts of process water with considerable concentrations of recalcitrant organic contaminants, such as polycyclic aromatic hydrocarbon (PAHs), phenolic compounds (PCs), and benzene, toluene, ethylbenzene, and xylene (BTEX), are generated by several segments of oil and gas industries. These segments include refineries, hydraulic fracturing (HF), and produced waters from the extraction of shale gas (SGPW), coalbed methane (CBMPW) and oil sands (OSPW). In fact, the concentration of PCs and PAHs in process water from refinery can reach 855 and 742 mg L-1, respectively. SGPW can contain BTEX at concentrations as high as 778 mg L-1. Adsorption can effectively target those organic compounds for the remediation of the process water by applying carbon-based adsorbents generated from organic feedstocks. Such organic feedstocks usually come from organic waste materials that would otherwise be conventionally disposed of. The objective of this review paper is to cover the scientific progress in the studies of carbon-based adsorbents from organic feedstocks that were successfully applied for the removal of organic contaminants PAHs, PCs, and BTEX. The contributions of this review paper include the important aspects of (i) production and characterization of carbon-based adsorbents to enhance the efficiency of organic contaminant adsorption, (ii) adsorption properties and mechanisms associated with the engineered adsorbent and expected for certain pollutants, and (iii) research gaps in the field, which could be a guidance for future studies. In terms of production and characterization of materials, standalone pyrolysis or hybrid procedures (pyrolysis associated with chemical activation methods) are the most applied techniques, yielding high surface area and other surface properties that are crucial to the adsorption of organic contaminants. The adsorption of organic compounds on carbonaceous materials performed well at wide range of pH and temperatures and this is desirable considering the pH of process waters. The mechanisms are frequently pore filling, hydrogen bonding, π-π, hydrophobic and electrostatic interactions, and same precursor material can present more than one adsorption mechanism, which can be beneficial to target more than one organic contaminant. Research gaps include the evaluation of engineered adsorbents in terms of competitive adsorption, application of adsorbents in oil and gas industry process water, adsorbent regeneration and reuse studies, and pilot or full-scale applications.
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Affiliation(s)
| | - Pamela Chelme-Ayala
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Chelsea Benally
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Bader S Al-Anzi
- Department of Environmental Technology Management, Kuwait University, P.O. Box 5969, Safat, 13060, Kuwait; Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, T6G 2P5, Canada
| | - Mohamed Gamal El-Din
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada.
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17
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Zhou J, Zhang X, Li Y, Feng S, Zhang Q, Wang W. Endocrine-disrupting metabolic activation of 2-nitrofluorene catalyzed by human cytochrome P450 1A1: A QM/MM approach. ENVIRONMENT INTERNATIONAL 2022; 166:107355. [PMID: 35751956 DOI: 10.1016/j.envint.2022.107355] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/25/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Nitropolycyclic aromatic hydrocarbons (NPAHs) present one of the most important airborne pollutants. Recent studies have shown that one of the most abundant NPAHs, 2-Nitrofluorene (NF), was supposed to be converted to endocrine-disrupting metabolites by cytochrome P450 1A1 (CYP1A1) in human cells. However, the mechanism is still largely unexplored. Here the metabolic activation and transformation mechanism of NF catalyzed by CYP1A1 were systematically studied with the aid of Molecular Dynamics, Density Functional Theory and Quantum Mechanics/Molecular Mechanics techniques. We evidence that CYP1A1 can activate NF through two elementary processes: (i) electrophilic addition (12.4 kcal·mol-1) or hydrogen abstraction (38.2 kcal·mol-1) and (ii) epoxidation (5.9 and 8.7 kcal·mol-1) or NIH shift (12.5 and 14.9 kcal·mol-1) or proton shuttle (12.1 kcal·mol-1). Electrophilic addition was found to be the rate-determining step while epoxidation rather than NIH shift or proton shuttle is the more feasible pathway after electrophilic addition. Metabolites 6,7-epoxide-2-nitrofluorene and 7,8-epoxide-2-nitrofluorene were identified as the major epoxidation products. Epoxides are unstable and easy to react with hydrated hydrogen ions and hydroxyls to produce endocrine disrupter 7-hydroxy-2-nitrofluorene. Toxic analysis shows that some of the metabolites are more toxic to model aquatic organisms (e.g. Green algea) than NF. Binding affinity analysis to human sex hormone binding globulin reveals that NF metabolites all have endocrine-disrupting potential. This study provides a comprehensive understanding on the biotransformation process of NF and may aid future studies on various NPAHs activation catalyzed by human P450 enzyme.
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Affiliation(s)
- Junhua Zhou
- Environment Research Institute, Shandong University, Qingdao 266237, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, PR China
| | - Xin Zhang
- Environment Research Institute, Shandong University, Qingdao 266237, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao 266237, PR China
| | - Yanwei Li
- Environment Research Institute, Shandong University, Qingdao 266237, PR China.
| | - Shanshan Feng
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
| | - Qingzhu Zhang
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
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18
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Medeiros DCCDS, Nzediegwu C, Benally C, Messele SA, Kwak JH, Naeth MA, Ok YS, Chang SX, Gamal El-Din M. Pristine and engineered biochar for the removal of contaminants co-existing in several types of industrial wastewaters: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:151120. [PMID: 34756904 DOI: 10.1016/j.scitotenv.2021.151120] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/14/2021] [Accepted: 10/17/2021] [Indexed: 05/22/2023]
Abstract
Biochar has been widely studied as an adsorbent for the removal of contaminants from wastewater due to its unique characteristics, such as having a large surface area, well-distributed pores and high abundance of surface functional groups. Critical review of the literature was performed to understand the state of research in utilizing biochars for industrial wastewater remediation with emphasis on pollutants that co-exist in wastewater from several industrial activities, such as textile, pharmaceutical and mining industries. Such pollutants include organic (such as synthetic dyes, phenolic compounds) and inorganic contaminants (such as cadmium, lead). Multiple correspondence analyses suggest that through batch equilibrium, columns or constructed wetlands, researchers have used mechanistic modelling of isotherms, kinetics, and thermodynamics to evaluate contaminant removal in either synthetic or real industrial wastewaters. The removal of organic and inorganic contaminants in wastewater by biochar follows several mechanisms: precipitation, surface complexation, ion exchange, cation-π interaction, and electrostatic attraction. Biochar production and modifications promote good adsorption capacity for those pollutants because biochar properties stemming from production were linked to specific adsorption mechanisms, such as hydrophobic and electrostatic interactions. For instance, adsorption capacity of malachite green ranged from 30.2 to 4066.9 mg g-1 depending on feedstock type, pyrolysis temperature, and chemical modifications. Pyrolyzing biomass at above 500 °C might improve biochar quality to target co-existing pollutants. Treating biochars with acids can also improve pollutant removal, except that the contribution of precipitation is reduced for potentially toxic elements. Studies on artificial intelligence and machine learning are still in their infancy in wastewater remediation with biochars. Meanwhile, a framework for integrating artificial intelligence and machine learning into biochar wastewater remediation systems is proposed. The reutilization and disposal of spent biochar and the contaminant release from spent biochar are important areas that need to be further studied.
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Affiliation(s)
| | - Christopher Nzediegwu
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Chelsea Benally
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Selamawit Ashagre Messele
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Jin-Hyeob Kwak
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2E3, Canada; Department of Rural Construction Engineering, Jeonbuk National University, Jeonju, Jeollabukdo 54896, Republic of Korea
| | - M Anne Naeth
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Yong Sik Ok
- Korea Biochar Research Center, APRU Sustainable Waste Management Program & Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Scott X Chang
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Mohamed Gamal El-Din
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
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19
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Yu L, Liu X, Hua Z, Zhang Y, Xue H. Spatial and temporal trends of perfluoroalkyl acids in water bodies: A case study in Taihu Lake, China (2009-2021). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 293:118575. [PMID: 34838873 DOI: 10.1016/j.envpol.2021.118575] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 06/13/2023]
Abstract
Perfluoroalkyl acids (PFAAs) have been ubiquitously detected in water bodies and are a cause of great public concern due to their adverse effects. This study investigated the long-term temporal-spatial trends of PFAAs in the water bodies of the entire Taihu Lake, and predicted PFAA concentrations for 2024. A field investigation conducted in 2021 and previous data allowed to derive trends over a broad temporal-spatial scale, which is often not feasible in short-term studies. In the 2009-2021 period, the most quantifiable PFAAs increased, among which perfluorooctanoic acid and perfluorohexanoic acid were predominant. As of 2021, the mean total concentration of ten PFAAs (∑10PFAA) showed a distinct spatial decreasing trend, moving from north to south within the lake, and similar spatial distribution patterns were also noted in other years. The main PFAA input and most serious contamination were concentrated in the northern region, due to the riverine inputs and clustering of PFAA-related industries. The ∑10PFAA concentration in the wet season was greater and presented a more uniform distribution pattern than that in the dry season, possibly due to the combined effects of the degradation of PFAA precursors, water inflow, rainfall, shipping activities, and a shallow water column. From 2009 to 2021 the ∑10PFAA concentration of the entire lake showed an increasing trend, but the rate of increase was significantly reduced. In addition, a grey model predicted that the mean ∑10PFAA concentration in the entire Taihu Lake will reach 431 ng/L in 2024, and the northern region will be affected by a more serious PFAA pollution in the future because it exhibited a high mean ∑10PFAA concentration of 426 ng/L in 2021. These findings provide novel insights into the temporal-spatial distribution of PFAAs in Taihu Lake, and could help regulators to formulate policy decisions in response to PFAA pollution.
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Affiliation(s)
- Liang Yu
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai Universities, Nanjing, 210098, PR China; Yangtze Institute for Conservation and Development, Hohai University, Jiangsu, 210098, PR China
| | - Xiaodong Liu
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai Universities, Nanjing, 210098, PR China; Yangtze Institute for Conservation and Development, Hohai University, Jiangsu, 210098, PR China
| | - Zulin Hua
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai Universities, Nanjing, 210098, PR China; Yangtze Institute for Conservation and Development, Hohai University, Jiangsu, 210098, PR China.
| | - Yuan Zhang
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai Universities, Nanjing, 210098, PR China; Yangtze Institute for Conservation and Development, Hohai University, Jiangsu, 210098, PR China
| | - Hongqin Xue
- School of Civil Engineering, Nanjing Forestry University, Nanjing, 210037, PR China
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20
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Kong J, Gao Z, Hu G, Huang W, Zhou S, He H, Xian Q, Sun C. Solid-phase microextraction combined with gas chromatography/triple quadrupole tandem mass spectrometry for determination of nitrated polycyclic aromatic hydrocarbons in sediments. J Sep Sci 2022; 45:1094-1105. [PMID: 34981623 DOI: 10.1002/jssc.202100644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 12/24/2021] [Accepted: 12/26/2021] [Indexed: 11/10/2022]
Abstract
Nitro-polycyclic aromatic hydrocarbons have been detected in various environmental media. However, determination in sediment matrix is challenging due to the lack of a suitable method. In this study, a reliable method for determining 15 nitro-polycyclic aromatic hydrocarbons in sediments was developed based on accelerated solvent extraction and solid-phase microextraction coupled with gas chromatography-tandem mass spectrometry. The accelerated solvent extraction and solid-phase microextraction are sample pre-treatment techniques that have advantages, such as rapid operation and minimal sample volume. Initially, the solid-phase microextraction was optimized using five commercial fibers and from that 65 μm polydimethylsiloxane/divinylbenzene fiber was selected as the best fiber. Further, the accelerated solvent extraction conditions were optimized by Taguchi experimental design, such as extraction temperature (120℃), extraction solvent (dichloromethane), number of cycles (two), static extraction period (4 min), and rinse volume (90%). The method parameters, such as limits of quantitation, and intraday and interday accuracy and precision, were in the range of 0.067-1.57 ng/g, 75.2-115.2%, 69.9-115.4%, and 1.0-16.5%, respectively. Upon meeting all the quality criteria, the method was applied successfully to analyze real sediment samples. Therefore, our study creates a new prospect for the future application of direct immersion solid-phase microextraction in sediment analysis.
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Affiliation(s)
- Jijie Kong
- School of Environment, Nanjing Normal University, Nanjing, P. R. China.,School of Geography, Nanjing Normal University, Nanjing, P. R. China.,The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China
| | - Zhaoqi Gao
- State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water, Environment Monitoring Center of Jiangsu Province, Nanjing, P. R. China
| | - Guanjiu Hu
- State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water, Environment Monitoring Center of Jiangsu Province, Nanjing, P. R. China
| | - Wen Huang
- Kaver Scientific Instruments, Co., Ltd, Nanjing, P. R. China
| | - Shaoda Zhou
- Kaver Scientific Instruments, Co., Ltd, Nanjing, P. R. China
| | - Huan He
- School of Environment, Nanjing Normal University, Nanjing, P. R. China
| | - Qiming Xian
- The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China
| | - Cheng Sun
- The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China
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21
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Zhao Y, Li J, Qi Y, Guan X, Zhao C, Wang H, Zhu S, Fu G, Zhu J, He J. Distribution, sources, and ecological risk assessment of polycyclic aromatic hydrocarbons (PAHs) in the tidal creek water of coastal tidal flats in the Yellow River Delta, China. MARINE POLLUTION BULLETIN 2021; 173:113110. [PMID: 34798430 DOI: 10.1016/j.marpolbul.2021.113110] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 10/25/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
The concentrations, distribution, sources and ecological risk levels of polycyclic aromatic hydrocarbons (PAHs) in tidal creek water from coastal tidal flats of the Yellow River Delta were investigated. The concentrations of 16 PAHs ranged from 0.113 to 1.533, with a mean value of 0.496 ± 0.035 μg L-1, which indicated a moderate level of pollution. The main long-term sources of PAHs in the coastal tidal flats of the Yellow River Delta were petroleum combustion and petroleum pollution. The ecological risk assessment showed that the levels of PAHs in tidal creek water of the coastal tidal flats in the Yellow River Delta corresponded to medium to high ecological risk levels, and a high probability of potential ecological risk, posing harm to aquatic organisms. Among the 7 sampling sites, site 5, site 6, and site 7 were at high ecological risk, and the other sites were at moderate ecological risk. PAH pollution in the tidal creek water near the Yellow River Estuary and farther south, in the coastal tidal wetland of Laizhou Bay, deserves special attention, especially with respect to the prevention and control of benzo[a]pyrene (BaP) pollution in the water.
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Affiliation(s)
- Yilei Zhao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Junsheng Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Yue Qi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Xiao Guan
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Caiyun Zhao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Hao Wang
- Research Institute of Eco-environmental Emergency, MEE, Guangzhou 510530, China
| | - Shuyu Zhu
- Administration Bureau of the Yellow River Delta National Nature Reserve, Dongying 257091, China
| | - Gang Fu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Jinfang Zhu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Jing He
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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22
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Tan H, Zhang H, Wu C, Wang C, Li Q. Pesticides in surface waters of tropical river basins draining areas with rice-vegetable rotations in Hainan, China: Occurrence, relation to environmental factors, and risk assessment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 283:117100. [PMID: 33865099 DOI: 10.1016/j.envpol.2021.117100] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
Pesticides are heavily applied in rice-vegetable rotations in tropical China, yet publicly available information on the contamination and risk of currently used pesticides (CUPs) and legacy pesticides (LPs) in surface waters of river basins draining these areas is very limited. Therefore, in two tropical river basins (Nandu River and Wanquan River basins) dominated by rice-vegetable rotations in Hainan, China, pesticides were analyzed in 256 surface water samples in wet and dry seasons. Forty-one pesticides were detected, and total concentrations ranged from not detectable to 24.2 μg/L. Carbendazim and imidacloprid were the two most prevalent CUPs, detected in 59.8% and 17.7%, respectively, of surface water samples at concentrations above 0.1 μg/L. Chlorpyrifos was the main LP, detected in 9.0% of samples at a concentration above 0.05 μg/L. The fungicides difenoconazole and emamectin benzoate, the herbicide butachlor, and the insecticide acetamiprid occurred in ≥12.5% samples at concentrations above 0.1 μg/L. Surface waters typically (85.2%) contained 5 to 15 residues, with an average of nine. Seasonally, the concentrations of the 41 pesticides were in the order January > July > November > September. Spatially, the composition of the main CUPs (not LPs) was significantly different depending on position in the drainage, which also changed with seasons. Crop and pest types and wet and dry seasons were the key factors controlling the spatiotemporal distribution of CUPs and LPs in surface waters. On the basis of evaluations of the exposures to individual pesticides and the dominant combinations with ≥8 pesticides, multiple pesticides were likely a significant risk to aquatic organisms, although noncarcinogenic and carcinogenic risks to humans were low. This study provides valuable data to better understand pesticide occurrence and ecological risks in river basins draining areas with rice-vegetable rotation systems in tropical China.
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Affiliation(s)
- Huadong Tan
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs, Danzhou, 571737, China; National Agricultural Experimental Station for Agricultural Environment, Danzhou, 571737, China; Hainan Engineering Research Center for Non-point Source and Heavy Metal Pollution Control, Danzhou, 571737, China
| | - Huijie Zhang
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; School of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Chunyuan Wu
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs, Danzhou, 571737, China; National Agricultural Experimental Station for Agricultural Environment, Danzhou, 571737, China; Hainan Engineering Research Center for Non-point Source and Heavy Metal Pollution Control, Danzhou, 571737, China.
| | - Chuanmi Wang
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Qinfen Li
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs, Danzhou, 571737, China; National Agricultural Experimental Station for Agricultural Environment, Danzhou, 571737, China; Hainan Engineering Research Center for Non-point Source and Heavy Metal Pollution Control, Danzhou, 571737, China
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23
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Wu W, Huang Y, Lin D, Yang K. Sorption mechanism of naphthalene by diesel soot: Insight from displacement with phenanthrene/p-nitrophenol. J Environ Sci (China) 2021; 106:136-146. [PMID: 34210429 DOI: 10.1016/j.jes.2021.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 01/15/2021] [Accepted: 01/15/2021] [Indexed: 06/13/2023]
Abstract
The nonlinear sorption of hydrophobic organic contaminants (HOCs) could be changed to linear sorption by the suppression of coexisting solutes in natural system, resulting in the enhancement of mobility, bioavailability and risks of HOCs in the environment. In previous study, inspired from the competitive adsorption on activated carbon (AC), the displaceable fraction of HOCs sorption to soot by competitor was attributed to the adsorption on elemental carbon fraction of soot (EC-Soot), while the linear and nondisplaceable fraction was attributed to the partition in authigenic organic matter of soot (OM-Soot). In this study, however, we observed that the linear and nondisplaceable fraction of HOC (naphthalene) to a diesel soot (D-Soot) by competitor (phenanthrene or p-nitrophenol) should be attributed to not only the linear partition in OM-Soot, but also the residual linear adsorption on EC-Soot. We also observed that the competition on the surface of soot dominated by external surface was different from that of AC dominated by micropore surface, i.e., complete displacement of HOCs by p-nitrophenol could occur for the micropore surface of AC, but not for the external surface of soot. These observations were obtained through the separation of EC-Soot and OM-Soot from D-Soot with organic-solvent extraction and the sorption comparisons of D-Soot with an AC (ACF300) and a multiwalled carbon nanotube (MWCNT30). The obtained results would give new insights to the sorption mechanisms of HOCs by soot and help to assess their environmental risks.
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Affiliation(s)
- Wenhao Wu
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Environmental Pollution and Ecological Health of Ministry of Education, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Yun Huang
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Environmental Pollution and Ecological Health of Ministry of Education, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Daohui Lin
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Environmental Pollution and Ecological Health of Ministry of Education, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Kun Yang
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Environmental Pollution and Ecological Health of Ministry of Education, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
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24
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Chen X, Vione D, Borch T, Wang J, Gao Y. Nano-MoO 2 activates peroxymonosulfate for the degradation of PAH derivatives. WATER RESEARCH 2021; 192:116834. [PMID: 33486288 DOI: 10.1016/j.watres.2021.116834] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
The rapid and efficient degradation of polycyclic aromatic hydrocarbon (PAH) derivatives with toxicological properties remains a substantial challenge. In this study, a cost-effective and eco-friendly catalyst, nano-MoO2 (0.05 g L-1), exhibited excellent performance in activating 4.0 mmol L-1 peroxymonosulfate (PMS) for the degradation of naphthalene derivatives with 1 mg L-1 in aqueous systems; these derivatives include 1-methylnaphthalene, 1-nitronaphthalene, 1-chloronaphthalene, 1-naphthylamine and 1-naphthol, with high degradation rates of 87.52%, 86.23%, 97.87%, 99.74%, and 77.16%. Nano-MoO2 acts as an electron donor by transferring an electron causing O-O bond of PMS to cleave producing SO4·-, and later ·OH. Electron paramagnetic resonance (EPR) analysis combined with free radical quenching research indicated that SO4·- and ·OH dominated the degradation of naphthalene derivatives, and O2·- and 1O2 participated in the processes. X-ray photoelectron spectroscopy (XPS) revealed the transformation of Mo(IV) to Mo(V) and Mo(VI), which suggested that the activation process proceeded via electron transfer from nano-MoO2 to PMS. The applicability of the nano-MoO2/PMS system in influencing parameters and stability was explored. The degradation pathways were primarily elucidated for each naphthalene derivative based on the intermediates identified in the systems. The -CH3, -NO2, -Cl, -OH substituents increased the positive electrostatic potential (ESP) on the molecular surface of 1-methylnaphthalene, 1-nitronaphthalene, 1-chloronaphthalene, and 1-naphthol, which reduced the electrophilic reaction and electron transfer between the reactive species and pollutants, leading to a lower degradation rate of naphthalene derivatives than the parent compound. However, the effect of -NH2 substituents is the opposite. These findings suggest that nano-MoO2 may aid as a novel catalyst in the future remediation of environments polluted with PAH derivatives.
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Affiliation(s)
- Xuwen Chen
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Davide Vione
- Department of Chemistry, University of Torino, Via Pietro Giuria 5, 10125 Torino, Italy
| | - Thomas Borch
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523-1170, United States; Department of Chemistry, Colorado State University, Fort Collins, CO 80523, United States
| | - Jian Wang
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Yanzheng Gao
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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