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Chaos Z, Fernández JA, Balseiro-Romero M, Celeiro M, García-Jares C, Méndez A, Pérez-Alonso P, Estébanez B, Kaal J, Nierop KGJ, Aboal JR, Monterroso C. What potential do mosses have as biomonitors of POPs? A comparative study of hexachlorocyclohexane sorption. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 934:173021. [PMID: 38740203 DOI: 10.1016/j.scitotenv.2024.173021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/03/2024] [Accepted: 05/04/2024] [Indexed: 05/16/2024]
Abstract
Persistent organic pollutants (POPs) pose a significant global threat to human health and the environment, and require continuous monitoring due to their ability to migrate long distances. Active biomonitoring using cloned mosses is an inexpensive but underexplored method to assess POPs, mainly due to the poor understanding of the loading mechanisms of these pollutants in mosses. In this work, Fontinalis antipyretica (aquatic moss) and Sphagnum palustre (terrestrial moss) were evaluated as potential biomonitors of hexachlorocyclohexanes (HCHs: α-, β-, γ-, δ-HCH), crucial POPs. Moss clones, grown in photobioreactors and subsequently oven-dried, were used. Their lipid composition and distribution were characterized through molecular and histochemical studies. Adsorption experiments were carried out in the aqueous phase using the repeated additions method and in the gas phase using an active air sampling technique based on solid-phase extraction, a pioneering approach in moss research. F. antipyretica exhibited greater lipid content in the walls of most cells and higher adsorption capacity for all HCH isomers in both gaseous and liquid environments. These findings highlight the need for further investigation of POP loading mechanisms in mosses and open the door to explore other species based on their lipid content.
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Affiliation(s)
- Z Chaos
- CRETUS, Dept. Edafoloxía e Química Agrícola, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - J A Fernández
- CRETUS, Ecology Unit, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - M Balseiro-Romero
- CRETUS, Dept. Edafoloxía e Química Agrícola, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - M Celeiro
- CRETUS, Dept. Química Analítica, Nutrición e Bromatoloxía, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - C García-Jares
- CRETUS, Dept. Química Analítica, Nutrición e Bromatoloxía, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - A Méndez
- CRETUS, Dept. Edafoloxía e Química Agrícola, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - P Pérez-Alonso
- CRETUS, Dept. Edafoloxía e Química Agrícola, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - B Estébanez
- Dept. Biología, Unidad de Botánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - J Kaal
- Pyrolyscience, 15707 Santiago de Compostela, Spain
| | - K G J Nierop
- Geolab, Faculty of Geosciences, Utrecht University, Princetonlaan 8, 3584 CB Utrecht, the Netherlands
| | - J R Aboal
- CRETUS, Ecology Unit, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - C Monterroso
- CRETUS, Dept. Edafoloxía e Química Agrícola, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Afzal G, Ali HM, Hussain T, Hussain S, Ahmad MZ, Naseer A, Iqbal R, Aslam J, Khan A, Elsadek MF, Al-Munqedhi BM, Hussain R. Effects of sub-lethal concentrations of lindane on histo-morphometric and physio-biochemical parameters of Labeo rohita. PLoS One 2024; 19:e0304387. [PMID: 38968252 PMCID: PMC11226008 DOI: 10.1371/journal.pone.0304387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 05/10/2024] [Indexed: 07/07/2024] Open
Abstract
Lindane is a broad-spectrum insecticide widely used on fruits, vegetables, crops, livestock and on animal premises to control the insects and pests. The extensive use of pesticides and their residues in the soil and water typically join the food chain and thus accumulate in the body tissues of human and animals causing severe health effects. The study was designed to determine the toxicity effects of sub-lethal concentrations of lindane on hemato-biochemical profile and histo-pathological changes in Rohu (Labeo rohita). A significant increase in the absolute (p<0.05) and relative (p<0.05) weights was observed along with severe histo-pathological alterations in liver, kidneys, gills, heart and brain at 30μg/L and 45μg/L concentration of lindane. A significant (p<0.05) decrease in RBCs count, PCV and Hb concentration while a significant (p<0.05) increased leukocytes were observed by 30μg/L and 45μg/L concentrations of lindane at 45 and 60 days of the experiment. Serum total protein and albumin were significantly (p<0.05) decreased while hepatic and renal enzymes were significantly (p<0.05) increased due to 30μg/L and 45μg/L concentrations of lindane at days-45 and 60 of experiment compared to control group. The observations of thin blood smear indicated significantly increased number of erythrocytes having nuclear abnormalities in the fish exposed at 30μg/L and 45μg/L concentrations of lindane. ROS and TBARS were found to be significantly increased while CAT, SOD, POD and GSH were significantly decreased with an increase in the concentration and exposure time of lindane. The results showed that lindane causes oxidative stress and severe hematological, serum biochemical and histo-pathological alterations in the fish even at sub-lethal concentrations.
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Affiliation(s)
- Gulnaz Afzal
- Department of Zoology, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Hafiz Muhammad Ali
- Faculty of Veterinary and Animals Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Tariq Hussain
- Department of Basic Sciences, College of Veterinary and Animal Science, Jhang, Pakistan
| | - Shujaat Hussain
- Faculty of Veterinary and Animals Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan
| | - Muhammad Zishan Ahmad
- Faculty of Veterinary and Animals Sciences, PMAS Arid Agriculture University, Rawalpindi, Pakistan
| | - Adeeba Naseer
- Department of Zoology, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Rehana Iqbal
- Zoology Division, Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan, Pakistan
| | - Jawaria Aslam
- Bahawalpur Medical and Dental College, Bahawalpur, Pakistan
| | - Ahrar Khan
- Shandong Vocational Animal and Veterinary Science College, Weifang, China
| | - Mohamed Farouk Elsadek
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Bandar M. Al-Munqedhi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Riaz Hussain
- Faculty of Veterinary and Animals Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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Fan C, Li J, Dai S, Xuan X, Xu D, Wen Y. Plasma Membrane (PM) H +-ATPase Mediates Rhizosphere Acidification and Regulates Herbicide Imazethapyr Toxicity in Wheat. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38623691 DOI: 10.1021/acs.jafc.4c00313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
The plasma membrane (PM) H+-ATPase is crucial for a plant defense system. However, there is currently no consensus on whether the PM H+-ATPase plays a role in alleviating the toxic effects of herbicides on nontarget plants. We found that under the herbicide imazethapyr (IM) exposure, PM H+-ATPase activity in wheat roots increased by approximately 69.53%, leading to rhizosphere acidification. When PM H+-ATPase activity is inhibited, the toxicity of IM significantly increases: When exposed to IM alone, the total Fe content of wheat roots decreased by 29.07%, the relative Fe2+ content increased by 27.75%, and the ROS content increased by 27.74%. When the PM H+-ATPase activity was inhibited, the corresponding data under IM exposure were 37.36%, 215%, and 57.68%, respectively. This work delves into the role of PM H+-ATPase in mediating the detoxification mechanism in plants exposed to herbicides, offering new insights into enhancing crop resistance against herbicides.
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Affiliation(s)
- Chenyang Fan
- MOE Key Laboratory of Environmental Remediation & Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jun Li
- MOE Key Laboratory of Environmental Remediation & Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Siyuan Dai
- MOE Key Laboratory of Environmental Remediation & Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xuan Xuan
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Dongmei Xu
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Yuezhong Wen
- MOE Key Laboratory of Environmental Remediation & Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
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Bolan S, Padhye LP, Jasemizad T, Govarthanan M, Karmegam N, Wijesekara H, Amarasiri D, Hou D, Zhou P, Biswal BK, Balasubramanian R, Wang H, Siddique KHM, Rinklebe J, Kirkham MB, Bolan N. Impacts of climate change on the fate of contaminants through extreme weather events. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 909:168388. [PMID: 37956854 DOI: 10.1016/j.scitotenv.2023.168388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/14/2023] [Accepted: 11/05/2023] [Indexed: 11/15/2023]
Abstract
The direct impacts of climate change involve a multitude of phenomena, including rising sea levels, intensified severe weather events such as droughts and flooding, increased temperatures leading to wildfires, and unpredictable fluctuations in rainfall. This comprehensive review intends to examine firstly the probable consequences of climate change on extreme weather events such as drought, flood and wildfire. This review subsequently examines the release and transformation of contaminants in terrestrial, aquatic, and atmospheric environments in response to extreme weather events driven by climate change. While drought and flood influence the dynamics of inorganic and organic contaminants in terrestrial and aquatic environments, thereby influencing their mobility and transport, wildfire results in the release and spread of organic contaminants in the atmosphere. There is a nascent awareness of climate change's influence of climate change-induced extreme weather events on the dynamics of environmental contaminants in the scientific community and decision-making processes. The remediation industry, in particular, lags behind in adopting adaptive measures for managing contaminated environments affected by climate change-induced extreme weather events. However, recognizing the need for assessment measures represents a pivotal first step towards fostering more adaptive practices in the management of contaminated environments. We highlight the urgency of collaboration between environmental chemists and climate change experts, emphasizing the importance of jointly assessing the fate of contaminants and rigorous action to augment risk assessment and remediation strategies to safeguard the health of our environment.
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Affiliation(s)
- Shiv Bolan
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia; Healthy Environments and Lives (HEAL) National Research Network, Australia
| | - Lokesh P Padhye
- Department of Civil and Environmental Engineering, Faculty of Engineering, The University of Auckland, Auckland 1010, New Zealand
| | - Tahereh Jasemizad
- Department of Civil and Environmental Engineering, Faculty of Engineering, The University of Auckland, Auckland 1010, New Zealand
| | - Muthusamy Govarthanan
- Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, South Korea; Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 600077, Tamil Nadu, India
| | - N Karmegam
- PG and Research Department of Botany, Government Arts College (Autonomous), Salem 636 007, Tamil Nadu, India
| | - Hasintha Wijesekara
- Department of Natural Resources, Faculty of Applied Sciences, Sabaragamuwa University, Belihuloya 70140, Sri Lanka
| | - Dhulmy Amarasiri
- Department of Natural Resources, Faculty of Applied Sciences, Sabaragamuwa University, Belihuloya 70140, Sri Lanka
| | - Deyi Hou
- School of Environment, Tsinghua University, Beijing 100084, People's Republic of China
| | - Pingfan Zhou
- School of Environment, Tsinghua University, Beijing 100084, People's Republic of China
| | - Basanta Kumar Biswal
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
| | - Rajasekhar Balasubramanian
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, People's Republic of China
| | - Kadambot H M Siddique
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany
| | - M B Kirkham
- Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA
| | - Nanthi Bolan
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia; Healthy Environments and Lives (HEAL) National Research Network, Australia.
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Ye T, Wang Z, Liu G, Teng J, Xu C, Liu L, He C, Chen J. Contaminant characterization of odor in soil of typical pesticide-contaminated site with shallow groundwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:121182-121195. [PMID: 37952068 DOI: 10.1007/s11356-023-30639-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 10/19/2023] [Indexed: 11/14/2023]
Abstract
Odor emission from the soil of pesticide-contaminated sites is a prominent environmental problem in China, but there are very few researches about the component and spatial distribution of odorous substances in the soil of contaminated sites. In this paper, to investigate the odor pollution condition of an organophosphorus pesticide production site in a city of South China, the odor pollutants in the soil and soil gas were analyzed and the key odor-contributing substances were identified. Besides, the correlation between the concentrations of odorous substances in soil and soil gas was analyzed, and the measured results were compared with the predicted results by the linear model and DED model. An off-line soil gas sampling device was designed to collect the gas emitted from soil because the groundwater level in the site was too shallow to build a soil gas well. The key odor substances were screened from the detection results of soil gas via odor activity value (OAV) analysis, which revealed that the key odorous substances included benzene, ethylbenzene, ammonia, toluene, m,p-xylene, methyl sulfide, dimethyl disulfide, and formaldehyde. Furthermore, the spatial distribution of the odor substances in the soil of the pesticide-contaminated site was closely related to the layout and geologic structure of the site. The odor pollutants in soil were mainly distributed near the phosmet production workshop and the drainage ditch network. As for the deep distribution, the odorous substances were mainly enriched in the silty clay or clay layer (5.6-11 m), followed by the sludge layer (1-3.6 m). Finally, the predicted model (linear model and DED model) analysis suggested that the linear model was more suitable for predicting the concentration of odorous substances in the soil gas with the detection data of soil in this pesticide-contaminated site.
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Affiliation(s)
- Tiantian Ye
- Ministry of Ecology and Environment, South China Institute of Environmental Sciences, Guangzhou, People's Republic of China, 510655
| | - Zhenxing Wang
- Ministry of Ecology and Environment, South China Institute of Environmental Sciences, Guangzhou, People's Republic of China, 510655
| | - Gang Liu
- Ministry of Ecology and Environment, South China Institute of Environmental Sciences, Guangzhou, People's Republic of China, 510655.
| | - Jianbiao Teng
- Ministry of Ecology and Environment, South China Institute of Environmental Sciences, Guangzhou, People's Republic of China, 510655
| | - Chong Xu
- Centre Testing International Pinbiao (Guangzhou) Co., Ltd, Guangzhou, People's Republic of China, 510700
| | - Lihong Liu
- Ministry of Ecology and Environment, South China Institute of Environmental Sciences, Guangzhou, People's Republic of China, 510655
| | - Chenhui He
- Ministry of Ecology and Environment, South China Institute of Environmental Sciences, Guangzhou, People's Republic of China, 510655
| | - Jianyu Chen
- Ministry of Ecology and Environment, South China Institute of Environmental Sciences, Guangzhou, People's Republic of China, 510655
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Giri J, Raut S, Rimal B, Adhikari R, Joshi TP, Shah G. Impact of air pollution on human health in different geographical locations of Nepal. ENVIRONMENTAL RESEARCH 2023; 226:115669. [PMID: 36921789 DOI: 10.1016/j.envres.2023.115669] [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: 06/28/2022] [Revised: 03/06/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
According to a recent survey, Nepal's urban air quality has been classified as one of the worst in the globe. A large portion of the country's population is subjected to health risks caused by air pollution. As Nepal has a wide variation in altitude coupled with socio-cultural and biological diversities, it is important to understand the different health hazards in the different geographical regions - Terai, Hills and Mountains. Constantly increasing physical infrastructures (such as transport vehicles, open burning of plastics and other fuels) are the main reasons for the escalating air pollution in the country. This study aims to critically review the current air pollution status in different geographical locations along with its impacts on public health in the country. It has been revealed that irrespective of geographic location, the air pollutants interfere with different human physiological systems related to respiration as well as cardiovascular, ophthalmic, and gastrointestinal functioning. Further, the research findings highlighting the influence of prolonged exposure of the population to the air pollution leading to the significant number of deaths have been presented. A notable rise in the number of hospitalized patients suffering from illnesses related to above mentioned pollution borne cases has been reported.
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Affiliation(s)
- Jyoti Giri
- Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Ghantaghar, Kathmandu, Nepal; Nepal Polymer Institute, P. O. Box 244115, Kathmandu, Nepal; Nepal Development Research Institute, Lalitpur, Kathmandu, Nepal.
| | - Sweccha Raut
- Central Department of Environmental Science, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Binita Rimal
- Central Department of Environmental Science, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Rameshwar Adhikari
- Research Centre for Applied Science and Technology (RECAST), Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Tista Prasai Joshi
- Nepal Academy of Science and Technology (NAST), Khumaltar, Lalitpur, Nepal
| | - Ganesh Shah
- Nepal Academy of Science and Technology (NAST), Khumaltar, Lalitpur, Nepal
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Iakovides M, Oikonomou K, Sciare J, Mihalopoulos N. Evidence of stockpile contamination for legacy polychlorinated biphenyls and organochlorine pesticides in the urban environment of Cyprus (Eastern Mediterranean): Influence of meteorology on air level variability and gas/particle partitioning based on equilibrium and steady-state models. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129544. [PMID: 35908394 DOI: 10.1016/j.jhazmat.2022.129544] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
The present study investigated comprehensively the atmospheric occurrence and fate of an extensive range of polychlorinated biphenyls (PCBs; forty-two congeners), organochlorine pesticides (OCPs; twenty-seven emerging and legacy agrochemicals) and polycyclic aromatic hydrocarbons (PAHs; fifty parent and alkylated members, including the non USEPA-16 listed toxic ones), in both gas and particulate phase of the scarcely monitored atmosphere over Cyprus for the first time. Parent-metabolite concentration ratios suggested fresh application for dichlorodiphenyl-trichloroethanes (DDTs), dicofol, hexachlorocyclohexanes, endosulfan and chlorothalonil, particularly during spring (April-May). Regressions of logarithms of partial pressure against ambient temperature revealed that secondary recycling from contaminated terrestrial surfaces regulates the atmospheric level variability of PCBs, DDTs, aldrin, chlordane, dicofol, heptachlor and endosulfan. Enthalpies of surface-air exchange (∆HSA) calculated from Clausius-Clapeyron equations were significantly correlated to vaporization enthalpies (∆HV) determined by chromatographic techniques, corroborating presence of potential stockpile-contaminated sites around the study area. The Harner-Bidleman equilibrium model simulating urban areas, and the Li-Jia empirical model, predicted better the partitioning behavior of PAHs (<four-ring parent and alkylated members), PCBs (<hexa-chlorobiphenyls), and OCPs, respectively. For heavier PAHs and PCBs, partitioning coefficients (KP) were inadequately predicted by the Li-Ma-Yang steady-state model, probably due to local human activities and regional transport in the study area.
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Affiliation(s)
- Minas Iakovides
- Climate and Atmosphere Research Center, The Cyprus Institute, 20, Konstantinou Kavafi Street, 2121 Aglantzia, Cyprus.
| | - Konstantina Oikonomou
- Climate and Atmosphere Research Center, The Cyprus Institute, 20, Konstantinou Kavafi Street, 2121 Aglantzia, Cyprus
| | - Jean Sciare
- Climate and Atmosphere Research Center, The Cyprus Institute, 20, Konstantinou Kavafi Street, 2121 Aglantzia, Cyprus
| | - Nikos Mihalopoulos
- Climate and Atmosphere Research Center, The Cyprus Institute, 20, Konstantinou Kavafi Street, 2121 Aglantzia, Cyprus; Chemistry Department, University of Crete, 71003 Heraklion, Crete, Greece; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, 15236 Athens, Greece
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Lud D, Schwemm A, Kalandadze B, Babaev E, Simon MP, Weller P, Düring RA. Pesticide handling and waste management: a case study on DDT and HCHs from the Southern Caucasus. SN APPLIED SCIENCES 2022. [DOI: 10.1007/s42452-022-04999-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Abstract
This study presents a survey on pesticide use, pesticide storage and pesticide disposal among 100 residents near a former pesticide store in rural Georgia using a standardized paper questionnaire. More than one quarter of the participants responded that the age of the pesticides they use is higher than 20 years. Based on this finding, it cannot be excluded that persistent organic pollutants like Dichloro-diphenyl-trichloroethane and hexachlorocyclohexanes still are released to the environment. Knowledge about active ingredients of pesticides is lacking among farmers: More than two thirds state that they know the active ingredients, while less than 10% mention an active ingredient matching the brand name they report. Purchasing pesticides in containers without labels appears to be common practice. Information about the pesticides is mainly obtained from the pesticide retailer, while the label is less important as a source of information. More than 95% of the participants store the pesticides in a separate store, but appropriate possibilities of hazardous waste disposal seem to be insufficient in rural areas in the region. The finding that pesticides are purchased and stored in repacked secondary containers, poses direct risks and hampers communication of risks to users. Improving (implementation of) regulations for pesticide handling and strengthening local knowledge through better vocational training can improve soil and groundwater protection and sustainable use of resources.
Article highlights
One of the main findings is that residents report using the pesticides for a long time. Not only are the pesticides used way longer than they may remain suitable for use, but also the pesticides could be dating from before international legislation entered into force which was set up to protect from long-lived organic pollutants (the Stockholm Convention). Our results show that often pesticides are repacked and stored in alternative containers such as plastic containers for detergents. This means users cannot find important information on how to use pesticides safely on these alternative containers. The label cannot be used as a source of information for example regarding health risks. This may lead to poisoning of users.
In Georgia, the transition process results in poor implementation of environmental regulations such as laws about waste management. The results show that educational level has a positive influence on choosing safe storage options such as a separate store. The results indicate that especially in rural areas possibilities of proper disposal of old pesticides or other dangerous chemicals are poor. This has implications for the health of residents.
Efforts to better implement environmental regulations should be strengthened especially in rural areas to overcome the legacy of long-lived pesticides which are now banned. Old pesticides might still be in use because they are difficult to dispose of safely.
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Assessment of PCBs in Surface Waters at Ultratrace Levels: Traditional Approaches and Biomonitoring (Lake Baikal, Russia). APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12042145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This article presents the results of the assessment of PCB concentrations in surface waters at ultratrace level of concentrations. The assessment of PCB concentrations is based on data from monitoring PCBs in Baikal water within the conventional approach as well as from biomonitoring of PCBs using Baikal omul, Coregonus migratorius, Georgi, 1775 (C. migratorius), as a bioindicator. The time cycle of the monitoring covered the period from 2014 to 2021. The concentrations of PCBs in the water were estimated from the concentrations of seven indicator congeners: 28, 52, 101, 118, 138, 153, and 180, and from congeners of dioxin-like (dl) PCBs in the tissues of C. migratorius. The average value and the statistically significant range of the detected total concentrations (Ʃ7PCBs) in Baikal water were 0.30 and 0.26–0.34 ng/L, respectively. In the tissues of C. migratorius, the average value and the range of Ʃ7PCB concentrations were 5.6 and 4.9–6.3 ng/g (ww), respectively, and for dl-PCBs, 1.5 and 1.3–1.7 ng/g (ww), respectively. The total toxicity equivalent of the detected dl-PCBs was in the WHO-TEQ (2005) range from 0.03 to 0.06 pg/g (ww). The concentrations of Ʃ7PCBs in Baikal water and dl-PCBs in the tissues of C. migratorius corresponded to the concentration levels in the European alpine lakes and the tissues of S. trutta fish inhabiting these lakes.
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Barrios-Rodríguez R, Pérez-Carrascosa FM, Gómez-Peña C, Mustieles V, Salcedo-Bellido I, Requena P, Martín-Olmedo P, Jiménez-Moleón JJ, Arrebola JP. Associations of accumulated selected persistent organic pollutants in adipose tissue with insulin sensitivity and risk of incident type-2 diabetes. ENVIRONMENT INTERNATIONAL 2021; 155:106607. [PMID: 33971459 DOI: 10.1016/j.envint.2021.106607] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Continuous exposure to low doses of persistent organic pollutant (POPs), such as those occurring in the general population, might contribute to the burden of type 2 diabetes mellitus (T2DM). However, evidences from longitudinal studies are scarce. We aimed to explore the associations of accumulated POP exposure with the development of T2DM by means of 1) longitudinal associations with the 16-year incidence of the disease, and 2) complementary cross-sectional analyses with markers of glucose homeostasis at recruitment. Organochlorine pesticide and polychlorinated biphenyl (PCB) concentrations were analyzed in adipose tissue samples and incident T2DM cases were retrieved from clinical records. Homeostatic model assessment values of insulin sensitivity/resistance and β-cell function at recruitment were calculated. Linear and Cox-regression models were performed. In individuals with normal weight/overweight (n = 293), we observed positive dose-response relationships between the studied POPs and T2DM risk, particularly for hexachlorobenzene (HCB) [hazard ratio (HR): 3.96 for 4th quartile versus 1st quartile (Q1); confidence interval (CI) 95%: 0.79, 19.71]. PCB-180 showed a positive but seemingly non-linear association with T2DM risk [HR of 3er quartile (Q3) versus Q1: 6.48; CI 95%: 0.82, 51.29]. Unadjustment for body mass index considerably increased the magnitude of the associations. In the cross-sectional study (n = 180), HCB and PCB-180 were inversely associated with insulin sensitivity and positively associated with insulin resistance parameters. Our results suggest that a higher burden of specific POPs in adipose tissue may disrupt glucose homeostasis, possibly contributing to increase T2DM risk, especially in non-obese adults.
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Affiliation(s)
- Rocío Barrios-Rodríguez
- Universidad de Granada. Departamento de Medicina Preventiva y Salud Pública, Granada, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.
| | - Francisco M Pérez-Carrascosa
- Universidad de Granada. Departamento de Medicina Preventiva y Salud Pública, Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; Servicio de Oncología Radioterápica. Hospital Universitario Virgen de las Nieves, Granada, Spain.
| | - Celia Gómez-Peña
- Department of Pharmacy, San Cecilio University Hospital, Granada, Spain.
| | - Vicente Mustieles
- Universidad de Granada. Departamento de Medicina Preventiva y Salud Pública, Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; University of Granada, Center for Biomedical Research (CIBM), Spain.
| | - Inmaculada Salcedo-Bellido
- Universidad de Granada. Departamento de Medicina Preventiva y Salud Pública, Granada, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.
| | - Pilar Requena
- Universidad de Granada. Departamento de Medicina Preventiva y Salud Pública, Granada, Spain.
| | - Piedad Martín-Olmedo
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain; Andalusian School of Public Health (EASP), Granada, Spain.
| | - José Juan Jiménez-Moleón
- Universidad de Granada. Departamento de Medicina Preventiva y Salud Pública, Granada, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.
| | - Juan Pedro Arrebola
- Universidad de Granada. Departamento de Medicina Preventiva y Salud Pública, Granada, Spain; Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain.
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11
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Wong F, Hung H, Dryfhout-Clark H, Aas W, Bohlin-Nizzetto P, Breivik K, Mastromonaco MN, Lundén EB, Ólafsdóttir K, Sigurðsson Á, Vorkamp K, Bossi R, Skov H, Hakola H, Barresi E, Sverko E, Fellin P, Li H, Vlasenko A, Zapevalov M, Samsonov D, Wilson S. Time trends of persistent organic pollutants (POPs) and Chemicals of Emerging Arctic Concern (CEAC) in Arctic air from 25 years of monitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:145109. [PMID: 33631575 DOI: 10.1016/j.scitotenv.2021.145109] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/05/2021] [Accepted: 01/07/2021] [Indexed: 06/12/2023]
Abstract
The long-term time trends of atmospheric pollutants at eight Arctic monitoring stations are reported. The work was conducted under the Arctic Monitoring and Assessment Programme (AMAP) of the Arctic Council. The monitoring stations were: Alert, Canada; Zeppelin, Svalbard; Stórhöfði, Iceland; Pallas, Finland; Andøya, Norway; Villum Research Station, Greenland; Tiksi and Amderma, Russia. Persistent organic pollutants (POPs) such as α- and γ-hexachlorocyclohexane (HCH), polychlorinated biphenyls (PCBs), α-endosulfan, chlordane, dichlorodiphenyltrichloroethane (DDT) and polybrominated diphenyl ethers (PBDEs) showed declining trends in air at all stations. However, hexachlorobenzene (HCB), one of the initial twelve POPs listed in the Stockholm Convention in 2004, showed either increasing or non-changing trends at the stations. Many POPs demonstrated seasonality but the patterns were not consistent among the chemicals and stations. Some chemicals showed winter minimum and summer maximum concentrations at one station but not another, and vice versa. The ratios of chlordane isomers and DDT species showed that they were aged residues. Time trends of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) were showing decreasing concentrations at Alert, Zeppelin and Andøya. The Chemicals of Emerging Arctic Concern (CEAC) were either showing stable or increasing trends. These include methoxychlor, perfluorohexane sulfonic acid (PFHxS), 6:2 fluorotelomer alcohol, and C9-C11 perfluorocarboxylic acids (PFCAs). We have demonstrated the importance of monitoring CEAC before they are being regulated because model calculations to predict their transport mechanisms and fate cannot be made due to the lack of emission inventories. We should maintain long-term monitoring programmes with consistent data quality in order to evaluate the effectiveness of chemical control efforts taken by countries worldwide.
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Affiliation(s)
- Fiona Wong
- Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St., Toronto, ON M3H 5T4, Canada
| | - Hayley Hung
- Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St., Toronto, ON M3H 5T4, Canada.
| | - Helena Dryfhout-Clark
- Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St., Toronto, ON M3H 5T4, Canada
| | - Wenche Aas
- NILU, Norwegian Institute for Air Research, P.O. Box 100, NO-2027 Kjeller, Norway
| | | | - Knut Breivik
- NILU, Norwegian Institute for Air Research, P.O. Box 100, NO-2027 Kjeller, Norway
| | | | - Eva Brorström Lundén
- IVL Swedish Environmental Research Institute, P.O. Box 47086, Göteborg 40 258, Sweden
| | - Kristín Ólafsdóttir
- University of Iceland, Department of Pharmacology and Toxicology, Hagi, Hofsvallagata 53, 107 Reykjavik, Iceland
| | - Árni Sigurðsson
- Icelandic Meteorological Office, Bustadavegur 7-9, 105 Reykjavik, Iceland
| | - Katrin Vorkamp
- Department of Environmental Science, Arctic Research Center, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark
| | - Rossana Bossi
- Department of Environmental Science, Arctic Research Center, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark
| | - Henrik Skov
- Department of Environmental Science, Arctic Research Center, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark
| | - Hannele Hakola
- Finnish Meteorological Institute, P.O. Box 503, FI-00101 Helsinki, Finland
| | - Enzo Barresi
- National Laboratory for Environmental Testing, National Water Research Institute, Environment and Climate Change Canada, Burlington, ON L7R 4A6, Canada
| | - Ed Sverko
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Phil Fellin
- Airzone One Ltd., 222, Matheson Blvd. E., Mississauga, ON L4Z 1X1, Canada
| | - Henrik Li
- Airzone One Ltd., 222, Matheson Blvd. E., Mississauga, ON L4Z 1X1, Canada
| | - Alexander Vlasenko
- Airzone One Ltd., 222, Matheson Blvd. E., Mississauga, ON L4Z 1X1, Canada
| | - Mikhail Zapevalov
- IPEM RPA "Typhoon", Obninsk, Kaluga reg, Pobeda str, 4, Russian Federation
| | - Dmitry Samsonov
- IPEM RPA "Typhoon", Obninsk, Kaluga reg, Pobeda str, 4, Russian Federation
| | - Simon Wilson
- Arctic Monitoring and Assessment Programme Secretariat, The Fram Centre, Box 6606, Langnes, 9296 Tromsø, Norway
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12
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Bescós A, Herrerías CI, Hormigón Z, Mayoral JA, Salvatella L. Theoretical insight on the treatment of β-hexachlorocyclohexane waste through alkaline dehydrochlorination. Sci Rep 2021; 11:8777. [PMID: 33888778 PMCID: PMC8062475 DOI: 10.1038/s41598-021-88060-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/01/2021] [Indexed: 11/09/2022] Open
Abstract
The occurrence of 4.8-7.2 million tons of hexachlorocyclohexane (HCH) isomers stocked in dumpsites around the world constitutes a huge environmental and economical challenge because of their toxicity and persistence. Alkaline treatment of an HCH mixture in a dehydrochlorination reaction is hampered by the low reactivity of the β-HCH isomer (HCl elimination unavoidably occurring through syn H-C-C-Cl arrangements). More intriguingly, the preferential formation of 1,2,4-trichlorobenzene in the β-HCH dehydrochlorination reaction (despite the larger thermodynamical stability of the 1,3,5-isomer) has remained unexplained up to now, though several kinetic studies had been reported. In this paper, we firstly show a detailed Density Functional study on all paths for the hydroxide anion-induced elimination of β-HCH through a three-stage reaction mechanism (involving two types of reaction intermediates). We have now demonstrated that the first reaction intermediate can follow several alternative paths, the preferred route involving abstraction of the most acidic allylic hydrogen which leads to a second reaction intermediate yielding only 1,2,4-trichlorobenzene as the final reaction product. Our theoretical results allow explaining the available experimental data on the β-HCH dehydrochlorination reaction (rate-determining step, regioselectivity, instability of some reaction intermediates).
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Affiliation(s)
- Alicia Bescós
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Clara I Herrerías
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Zoel Hormigón
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
- Instituto de Tecnología Química (ITQ-CSIC), Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - José Antonio Mayoral
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Luis Salvatella
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain.
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13
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Puentes Jácome LA, Lomheim L, Gaspard S, Edwards EA. Biodegradation of Lindane (γ-Hexachlorocyclohexane) To Nontoxic End Products by Sequential Treatment with Three Mixed Anaerobic Microbial Cultures. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2968-2979. [PMID: 33557520 DOI: 10.1021/acs.est.0c07221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The γ isomer of hexachlorocyclohexane (HCH), also known as lindane, is a carcinogenic persistent organic pollutant. Lindane was used worldwide as an agricultural insecticide. Legacy soil and groundwater contamination with lindane and other HCH isomers is still a big concern. The biotic reductive dechlorination of HCH to nondesirable and toxic lower chlorinated compounds such as monochlorobenzene (MCB) and benzene, among others, has been broadly documented. Here, we demonstrate that complete biodegradation of lindane to nontoxic end products is attainable using a sequential treatment approach with three mixed anaerobic microbial cultures referred to as culture I, II, and III. Biaugmentation with culture I achieved dechlorination of lindane to MCB and benzene. Culture II was able to dechlorinate MCB to benzene, and finally, culture III carried out methanogenic benzene degradation. Distinct Dehalobacter populations, corresponding to different 16S rRNA amplicon sequence variants in culture I and culture II, were responsible for lindane and MCB dechlorination, respectively. This study continues to highlight key roles of Dehalobacter as chlorobenzene- and HCH -respiring bacteria and demonstrates that sequential treatment with specialized anaerobic cultures may be explored at field sites in order to address legacy soil and groundwater contamination with HCH.
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Affiliation(s)
- Luz A Puentes Jácome
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
| | - Line Lomheim
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
| | - Sarra Gaspard
- Laboratory COVACHIMM2E, Université des Antilles, Pointe à Pitre, Guadeloupe, French West-Indies 97157, France
| | - Elizabeth A Edwards
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
- Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario M5S 3E5, Canada
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14
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Zhang W, Lin Z, Pang S, Bhatt P, Chen S. Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System. Front Microbiol 2020; 11:522. [PMID: 32292398 PMCID: PMC7119470 DOI: 10.3389/fmicb.2020.00522] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 03/10/2020] [Indexed: 12/19/2022] Open
Abstract
Lindane (γ-hexachlorocyclohexane) is an organochlorine pesticide that has been widely used in agriculture over the last seven decades. The increasing residues of lindane in soil and water environments are toxic to humans and other organisms. Large-scale applications and residual toxicity in the environment require urgent lindane removal. Microbes, particularly Gram-negative bacteria, can transform lindane into non-toxic and environmentally safe metabolites. Aerobic and anaerobic microorganisms follow different metabolic pathways to degrade lindane. A variety of enzymes participate in lindane degradation pathways, including dehydrochlorinase (LinA), dehalogenase (LinB), dehydrogenase (LinC), and reductive dechlorinase (LinD). However, a limited number of reviews have been published regarding the biodegradation and bioremediation of lindane. This review summarizes the current knowledge regarding lindane-degrading microbes along with biodegradation mechanisms, metabolic pathways, and the microbial remediation of lindane-contaminated environments. The prospects of novel bioremediation technologies to provide insight between laboratory cultures and large-scale applications are also discussed. This review provides a theoretical foundation and practical basis to use lindane-degrading microorganisms for bioremediation.
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Affiliation(s)
- Wenping Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Ziqiu Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shimei Pang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
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15
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Qiao W, Puentes Jácome LA, Tang X, Lomheim L, Yang MI, Gaspard S, Avanzi IR, Wu J, Ye S, Edwards EA. Microbial Communities Associated with Sustained Anaerobic Reductive Dechlorination of α-, β-, γ-, and δ-Hexachlorocyclohexane Isomers to Monochlorobenzene and Benzene. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:255-265. [PMID: 31830788 DOI: 10.1021/acs.est.9b05558] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Intensive historical and worldwide use of pesticide formulations containing hexachlorocyclohexane (HCH) has led to widespread contamination. We derived four anaerobic enrichment cultures from HCH-contaminated soil capable of sustainably dechlorinating each of α-, β-, γ-, and δ-HCH isomers stoichiometrically to benzene and monochlorobenzene (MCB). For each isomer, the dechlorination rates, inferred from production rates of the dechlorinated products, MCB and benzene, increased progressively from <3 to ∼12 μM/day over 2 years. The molar ratio of benzene to MCB produced was a function of the substrate isomer and ranged from β (0.77 ± 0.15), α (0.55 ± 0.09), γ (0.13 ± 0.02), to δ (0.06 ± 0.02) in accordance with pathway predictions based on prevalence of antiperiplanar geometry. Data from 16S rRNA gene amplicon sequencing and quantitative PCR revealed significant increases in the absolute abundances of Pelobacter and Dehalobacter, most notably in the α-HCH and δ-HCH cultures. Cultivation with a different HCH isomer resulted in distinct bacterial communities, but similar archaeal communities. This study provides the first direct comparison of shifts in anaerobic microbial communities induced by the dechlorination of distinct HCH isomers. It also uncovers candidate microorganisms responsible for the dechlorination of α-, β-, γ-, and δ-HCH, a key step toward better understanding and monitoring of natural attenuation processes and improving bioremediation technologies for HCH-contaminated sites.
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Affiliation(s)
- Wenjing Qiao
- Key Laboratory of Surficial Geochemistry, Ministry of Education; School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada
- Department of Microbiology, Key Lab of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Luz A Puentes Jácome
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada
| | - Xianjin Tang
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada
- Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Line Lomheim
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada
| | - Minqing Ivy Yang
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada
| | - Sarra Gaspard
- Laboratory COVACHIMM2E, EA 3592, Université des Antilles, Pointe à Pitre 97157, Guadeloupe, French West-Indies, France
| | - Ingrid Regina Avanzi
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada
- Laboratory of Biomaterial and Tissue Engineering, Federal University of Sao Paulo, 136 Silva Jardim Street, Santos 11015-020, São Paulo, Brazil
| | - Jichun Wu
- Key Laboratory of Surficial Geochemistry, Ministry of Education; School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
| | - Shujun Ye
- Key Laboratory of Surficial Geochemistry, Ministry of Education; School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
| | - Elizabeth A Edwards
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada
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16
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Vijgen J, de Borst B, Weber R, Stobiecki T, Forter M. HCH and lindane contaminated sites: European and global need for a permanent solution for a long-time neglected issue. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 248:696-705. [PMID: 30849587 DOI: 10.1016/j.envpol.2019.02.029] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 02/09/2019] [Accepted: 02/10/2019] [Indexed: 06/09/2023]
Abstract
During the last 70 years 1, 2, 3, 4, 5, 6-Hexachlorocyclohexane (HCH) has been one of the most extensively used pesticides. Only the gamma-isomer has insecticidal properties. For the marketing of gamma-HCH (lindane) the other 85% HCH isomers which are formed as by-products during HCH production had to be separated and became finally hazardous waste. For each tonne of lindane 8-12 tonnes of waste HCH isomers were produced and production of the approximately 600,000 t of lindane has therefore generated 4.8 to 7.2 million tonnes of HCH/POPs waste. These waste isomers were mostly buried in uncontrolled dumps at many sites around the world. The stockpiles and the large contaminated sites can be categorized as "mega-sites". Countries with HCH legacy problems include Albania, Argentina, Austria, Azerbaijan, Brazil, China, Croatia, Czech Republic, France, Germany, Hungary, India, Italy, Japan, Macedonia, Nigeria, Poland, Romania, Russia, Slovakia, South Africa, Spain, Switzerland, Turkey, The Netherlands, UK, Ukraine and the USA. As lindane and alpha- and beta-HCH have been listed as POPs in the Stockholm Convention since August 2010, the problem of stockpiles of HCH waste is now documented and globally acknowledged. This article describes briefly the legacy of HCH and lindane that has been created. Three of the mega-sites are being discussed and demonstrate the increase in pollution footprint over time. Recent developments in the EU (including the Sabinanigo project in Aragon/Spain) and on a global level are presented. A short overview is given on lack of activities and on actions of countries within their obligations as Parties of the Stockholm Convention. Furthermore, current country activities supported by the Global Environment Facility (GEF), the "financing mechanism" of the convention, are listed. Finally, conclusions and recommendations are formulated that will contribute to the solution of this problem over the next 25 years.
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Affiliation(s)
- John Vijgen
- International HCH & Pesticides Association (IHPA), Elmevej 14, Holte, Denmark.
| | - Bram de Borst
- International HCH & Pesticides Association (IHPA), the Netherlands.
| | - Roland Weber
- POPs Environmental Consulting, Lindenfirststrasse 23, 73527, Schwäbisch Gmünd, Germany.
| | - Tomasz Stobiecki
- Institute of Plant Protection, National Research Institute, Sośnicowice, Poland.
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