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Doussan I, Barthélémy C, Berny P, Bureau-Point E, Corio-Costet MF, Le Perchec S, Mamy L. Regulatory framework for the assessment of the impacts of plant protection products on biodiversity: review of strengths and limits. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:36577-36590. [PMID: 38760600 DOI: 10.1007/s11356-024-33638-7] [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: 10/24/2023] [Accepted: 05/06/2024] [Indexed: 05/19/2024]
Abstract
The placing of plant protection products (PPPs) on the market in the European Union is governed by numerous regulations. These regulations are among the most stringent in the world, however they have been the subject of criticisms especially because of the decline in biodiversity. The objectives of this work were to review (1) the functioning and actors involved in the PPP framework processes, (2) the construction of the environmental risk assessment focused on biodiversity, and (3) the suggested ways to respond to the identified limits. Both literature from social sciences and ecotoxicology were examined. Despite the protective nature of the European regulation on PPPs, the very imperfect consideration of biodiversity in the evaluation process was underlined. The main limits are the multiplicity of applicable rules, the routinization of the evaluation procedures, the lack of consideration of social data, and the lack of independence of the evaluation. Strengths of the regulation are the decision to integrate a systemic approach in the evaluation of PPPs, the development of modeling tools, and the phytopharmacovigilance systems. The avenues for improvement concern the realism of the risk assessment (species used, cocktail effects…), a greater transparency and independence in the conduct of evaluations, and the opening of the evaluation and decision-making processes to actors such as beekeepers or NGOs. Truly interdisciplinary reflections crossing the functioning of the living world, its alteration by PPPs, and how these elements question the users of PPPs would allow to specify social actions, public policies, and their regulation to better protect biodiversity.
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Affiliation(s)
- Isabelle Doussan
- GREDEG, CNRS, INRAE, Université Côte d'Azur, Valbonne, 06560, France
| | | | - Philippe Berny
- UR ICE Vetagro Sup, Campus Vétérinaire de Lyon, 69670, Marcy l'étoile, France
| | - Eve Bureau-Point
- Centre Norbert Elias, UMR 8562, CNRS, UAPV, 13002, Marseille, AMU, France
| | | | | | - Laure Mamy
- AgroParisTech, UMR ECOSYS, Université Paris-Saclay, INRAE, 91120, Palaiseau, France.
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2
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Sun J, Xiao P, Yin X, Zhu G, Brock TCM. Aquatic and sediment ecotoxicity data of difenoconazole and its potential environmental risks in ponds bordering rice paddies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 273:116135. [PMID: 38402793 DOI: 10.1016/j.ecoenv.2024.116135] [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: 09/24/2023] [Revised: 01/30/2024] [Accepted: 02/18/2024] [Indexed: 02/27/2024]
Abstract
Difenoconazole has a widespread agricultural use to control fungal diseases in crops, including rice. In edge-of-field surface waters the residues of this lipophilic fungicide may be toxic to both pelagic and benthic organisms. To allow an effect assessment we mined the regulatory and open literature for aquatic toxicity data. Since published sediment toxicity data were scarce we conducted 28 d sediment-spiked toxicity test with 8 species of benthic macroinvertebrates. Ecotoxicological threshold levels for effects were assessed by applying the species sensitivity distribution approach. Based on short-term L(E)C50's for aquatic organisms from water-only tests an acute Hazardous Concentration to 5% of the species (HC5) of 100 µg difenoconazole/L was obtained, while the HC5 based on chronic NOEC values was a factor of 104 lower (0.96 µg difenoconazole/L). For benthic macroinvertebrates the chronic HC5, based on 28d-L(E)C10 values, was 0.82 mg difenoconazole/kg dry weight sediment. To allow a risk assessment for water- and sediment-dwelling organisms, exposure concentrations were predicted for the water and sediment compartment of an edge-of-field pond bordering rice paddies treated with difenoconazole using the Chinese Top-Rice modelling approach, the Chinese Nanchang exposure scenario and the Equilibrium Partitioning theory. It appeared that in the vast majority of the 20 climate years simulated, potential risks to aquatic and sediment organisms cannot be excluded. Although the HC5 values based on laboratory toxicity data provide one line of evidence only, our evaluation suggests population- and community-level effects on these organisms due to chronic risks in particular.
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Affiliation(s)
- Jian Sun
- Zhe Jiang Agriculture and Forestry University, College of Advanced Agriculture Science, 666 Wu Su Street, Lin'an, Hangzhou, Zhe Jiang 311300, China
| | - PengFei Xiao
- JiYang College of Zhe Jiang Agriculture and Forestry University, 77 Pu Yang road, Zhu Ji, Hang Zhou 311800, China
| | - XiaoHui Yin
- Zhe Jiang Agriculture and Forestry University, College of Advanced Agriculture Science, 666 Wu Su Street, Lin'an, Hangzhou, Zhe Jiang 311300, China.
| | - GuoNian Zhu
- Zhe Jiang Agriculture and Forestry University, College of Advanced Agriculture Science, 666 Wu Su Street, Lin'an, Hangzhou, Zhe Jiang 311300, China
| | - Theo C M Brock
- Wageningen Environmental Research, Wageningen University and Research, P.O. Box 47, Wageningen 6700 AA, the Netherlands
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3
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Martínez-Megías C, Mentzel S, Fuentes-Edfuf Y, Moe SJ, Rico A. Influence of climate change and pesticide use practices on the ecological risks of pesticides in a protected Mediterranean wetland: A Bayesian network approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:163018. [PMID: 36963680 DOI: 10.1016/j.scitotenv.2023.163018] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/28/2023] [Accepted: 03/19/2023] [Indexed: 05/13/2023]
Abstract
Pollution by agricultural pesticides is one of the most important pressures affecting Mediterranean coastal wetlands. Pesticide risks are expected to be influenced by climate change, which will result in an increase of temperatures and a decrease in annual precipitation. On the other hand, pesticide dosages are expected to change given the increase in pest resistance and the implementation of environmental policies like the European ´Farm-to-Fork` strategy, which aims for a 50 % reduction in pesticide usage by 2030. The influence of climate change and pesticide use practices on the ecological risks of pesticides needs to be evaluated making use of realistic environmental scenarios. This study investigates how different climate change and pesticide use practices affect the ecological risks of pesticides in the Albufera Natural Park (Valencia, Spain), a protected Mediterranean coastal wetland. We performed a probabilistic risk assessment for nine pesticides applied in rice production using three climatic scenarios (for the years 2008, 2050 and 2100), three pesticide dosage regimes (the recommended dose, and 50 % increase and 50 % decrease), and their combinations. The scenarios were used to simulate pesticide exposure concentrations in the water column of the rice paddies using the RICEWQ model. Pesticide effects were characterized using acute and chronic Species Sensitivity Distributions built with toxicity data for aquatic organisms. Risk quotients were calculated as probability distributions making use of Bayesian networks. Our results show that future climate projections will influence exposure concentrations for some of the studied pesticides, yielding higher dissipation and lower exposure in scenarios dominated by an increase of temperatures, and higher exposure peaks in scenarios where heavy precipitation events occur right after pesticide application. Our case study shows that pesticides such as azoxystrobin, difenoconazole and MCPA are posing unacceptable ecological risks for aquatic organisms, and that the implementation of the ´Farm-to-Fork` strategy is crucial to reduce them.
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Affiliation(s)
- Claudia Martínez-Megías
- University of Alcalá, Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Ctra. Madrid-Barcelona KM 33.600, 28871 Alcalá de Henares, Madrid, Spain; IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Av. Punto Com 2, Alcalá de Henares 28805, Madrid, Spain
| | - Sophie Mentzel
- Norwegian Institute for Water Research, Økernveien 94, 0579 Oslo, Norway
| | - Yasser Fuentes-Edfuf
- Department of Strategy, IE Business School, IE University, Paseo de la Castellana 259 E., 28046 Madrid, Spain
| | - S Jannicke Moe
- Norwegian Institute for Water Research, Økernveien 94, 0579 Oslo, Norway
| | - Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Av. Punto Com 2, Alcalá de Henares 28805, Madrid, Spain; Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, c/ Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
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4
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Kim DY, Han JW, Lee JW, Kim B, Kim YS, Kim HT, Choi GJ, Kim H. Biocontrol potential of Chitinophaga flava HK235 producing antifungal-related peptide chitinocin. Front Microbiol 2023; 14:1170673. [PMID: 37283917 PMCID: PMC10239826 DOI: 10.3389/fmicb.2023.1170673] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/05/2023] [Indexed: 06/08/2023] Open
Abstract
Botrytis cinerea is a necrotrophic fungal pathogen with an extremely broad host range, causing significant economic losses in agricultural production. In this study, we discovered a culture filtrate of bacterial strain HK235, which was identified as Chitinophaga flava, exhibiting high levels of antifungal activity against B. cinerea. From the HK235 culture filtrate, we isolated a new antimicrobial peptide molecule designated as chitinocin based on activity-guided fractionation followed by characterization of the amino acid composition and spectroscopic analyses. The HK235 culture filtrate and chitinocin completely inhibited both conidial germination and mycelial growth of B. cinerea at a concentration of 20% and 200 μg/mL, respectively. In addition to antibiosis against B. cinerea, the active compound chitinocin had a broad antifungal and antibacterial activity in vitro. When tomato plants were treated with the culture filtrate and chitinocin, the treatment strongly reduced the development of gray mold disease in a concentration-dependent manner compared to the untreated control. Here, considering the potent antifungal property in vitro and in vivo, we present the biocontrol potential of C. flava HK235 for the first time.
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Affiliation(s)
- Da Yeon Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Plant Medicine, Chungbuk National University, Cheongju, South Korea
| | - Jae Woo Han
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
| | - Jin Woo Lee
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Bomin Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Yeong Seok Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Heung-Tae Kim
- Department of Plant Medicine, Chungbuk National University, Cheongju, South Korea
| | - Gyung Ja Choi
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
| | - Hun Kim
- Center for Eco-Friendly New Materials, Korea Research Institute of Chemical Technology, Daejeon, South Korea
- Department of Medicinal Chemistry and Pharmacology, University of Science and Technology, Daejeon, South Korea
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5
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Daam MA. Toward a tiered regulatory framework for the prospective aquatic effect assessment of pesticides in (Neo)tropical areas. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2023; 19:638-647. [PMID: 36437571 DOI: 10.1002/ieam.4702] [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: 05/13/2022] [Revised: 10/10/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
Research and regulatory interest into (Neo)tropical aquatic pesticide ecotoxicology has increased considerably over the past few years. However, pesticide effect assessment frameworks in (Neo)tropical areas remain largely undeveloped and as such not implemented. The present study provides an overview of studies into the comparison of pesticide sensitivity between (Neo)tropical and temperate aquatic taxa. Recommended assessment factors to be applied to temperate toxicity data for use in tropical effect assessments differ significantly between these studies. Shortcomings and bottlenecks of available pesticide sensitivity comparison studies based on results from bioassays, species sensitivity distributions, and model ecosystem studies are scrutinized. Current data lacks and (subsequent) indications for future research are also covered. Ultimately, implications for procedures aimed at the derivation of regulatory acceptable concentrations for pesticides in (Neo)tropical edge-of-field surface waters are discussed. Integr Environ Assess Manag 2023;19:638-647. © 2022 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
- Michiel A Daam
- Department of Environmental Sciences and Engineering, NOVA School of Science and Technology, CENSE, NOVA University Lisbon, Caparica, Portugal
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6
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Rico A, Redondo-Hasselerharm PE, Vighi M, Waichman AV, Nunes GSDS, de Oliveira R, Singdahl-Larsen C, Hurley R, Nizzetto L, Schell T. Large-scale monitoring and risk assessment of microplastics in the Amazon River. WATER RESEARCH 2023; 232:119707. [PMID: 36773351 DOI: 10.1016/j.watres.2023.119707] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/31/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Microplastics (MPs) are one of the most widespread contaminants worldwide, yet their risks for freshwater ecosystems have seldom been investigated. In this study, we performed a large monitoring campaign to assess the presence and risks of MPs in Amazonian freshwater ecosystems. We investigated MP pollution in 40 samples collected along 1500 km in the Brazilian Amazon, including the Amazon River, three major tributaries, and several streams next to the most important urban areas. MPs in the 55-5000 µm size range were characterized (size, shape, color) by microscopy and identified (polymer composition) by infrared spectroscopy. Ecotoxicological risks were assessed using chronic Species Sensitivity Distributions for effects triggered by food dilution and tissue translocation using data alignment methods that correct for polydispersity of environmental MPs and bioaccessibility. This study shows that MPs are ubiquitous contaminants in Amazonian freshwater ecosystems, with measured concentrations (55-5000 µm) ranging between 5 and 152 MPs/m3 in the Amazon River and its main tributaries, and between 23 and 74,550 MPs/m3 in urban streams. The calculated Hazardous Concentration for the 5% of species (HC5) derived from the SSDs for the entire MP range (1-5000 µm) were 1.6 × 107 MPs/m3 (95% CI: 1.2 × 106 - 4.0 × 108) for food dilution, and 1.8 × 107 MPs/m3 (95% CI: 1.5 × 106 - 4.3 × 108) for translocation. Rescaled exposure concentrations (1-5000 µm) in the Amazon River and tributaries ranged between 6.0 × 103 and 1.8 × 105 MPs/m3, and were significantly lower than the calculated HC5 values. Rescaled concentrations in urban streams ranged between 1.7 × 105 and 5.7 × 108 MPs/m3, and exceeded both calculated HC5 values in 20% of the locations. This study shows that ecological impacts by MP contamination are not likely to happen in the Amazon River and its major tributaries. However, risks for freshwater organisms may be expected in near densely populated areas, such as the cities of Manaus or Belem, which have limited wastewater treatment facilities.
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Affiliation(s)
- Andreu Rico
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Valencia 46980, Spain; IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, Alcalá de Henares, Madrid 28805, Spain.
| | - Paula E Redondo-Hasselerharm
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, Alcalá de Henares, Madrid 28805, Spain
| | - Marco Vighi
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, Alcalá de Henares, Madrid 28805, Spain
| | - Andrea V Waichman
- Federal University of the Amazon, Institute of Biological Sciences, Av. Rodrigo Otávio Jordao Ramos 3000, Manaus 69077-000, Brazil
| | - Gabriel Silva de Souza Nunes
- Federal University of Pernambuco, Department of Zoology, Av. Prof Moraes Rego 1235, Cidade Universitária, Recife 50670-901, Brazil
| | - Rhaul de Oliveira
- University of Campinas, School of Technology, Rua Paschoal Marmo 1888 - Jd. Nova Itália, Limeira 13484-332, Brazil
| | | | - Rachel Hurley
- Norwegian Institute for Water Research (NIVA), Gaustadelléen 21, Oslo 0349, Norway
| | - Luca Nizzetto
- Norwegian Institute for Water Research (NIVA), Gaustadelléen 21, Oslo 0349, Norway; Research Centre for Toxic Compounds in the Environment (RECETOX), Faculty of Science, Masaryk University, Kamenice 753/5, Brno 62500, Czech Republic
| | - Theresa Schell
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, Alcalá de Henares, Madrid 28805, Spain
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Shen C, Lei B, Lu C, Zhou F. Research on the effectiveness of online food safety supervision under the existence of settled enterprises' myopic cognitive bias. Heliyon 2023; 9:e12784. [PMID: 36647351 PMCID: PMC9840359 DOI: 10.1016/j.heliyon.2022.e12784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 10/10/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023] Open
Abstract
Although the scale of China's online food industry grew rapidly in recent years, the risky operational practices of business were not adequately prohibited. Based on the repeated illegal behaviors of online food enterprises, this study constructs the intertemporal utility model of online food enterprises from the perspective of behavioral economics. It was discovered that the presence of cognitive biases with a short-term focus in online food businesses would result in dangerous food sales behavior. The myopic unsafe online food quantity deviation of businesses would decrease as the cognitive deviation coefficient and penalty factor of online food businesses increase. Due to the existence of myopic cognitive bias, it is difficult for online food businesses to perceive the difference between the discount factor in the short term and the long term during the decision-making process. Therefore, they will not choose to sell a significant quantity of dangerous food. However, during the sales behavior phase, food-settled enterprises would opt to offer more dangerous food due to myopic cognitive bias. According to the different behaviors of online food enterprises in different periods, this study provides some corresponding supervision strategies for government regulators in the near and far future. Even though government departments could act quickly to investigate and deal with food safety incidents that are less harmful, the long-term solutions to ensure continued online food safety and optimize the online business environment are to build comprehensive system of online food safety regulation, improve information disclosure of online food enterprises, and enhance the government online governance structures.
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Affiliation(s)
- Cong Shen
- School of Management, Henan University of Technology, Zhengzhou, China
| | - Bing Lei
- School of Management, Henan University of Technology, Zhengzhou, China,Corresponding author.
| | - Chang Lu
- School of Education, Shanghai Jiao Tong University, Shanghai, China
| | - Feng Zhou
- Zhengzhou Administration for Market Regulation, Zhengzhou, China
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8
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Rodrigues-Silva F, V M Starling MC, Amorim CC. Challenges on solar oxidation as post-treatment of municipal wastewater from UASB systems: Treatment efficiency, disinfection and toxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 850:157940. [PMID: 35952890 PMCID: PMC9554792 DOI: 10.1016/j.scitotenv.2022.157940] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 08/05/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
The application of solar photo-Fenton as post-treatment of municipal secondary effluents (MSE) in developing tropical countries is the main topic of this review. Alternative technologies such as stabilization ponds and upflow anaerobic sludge blanket (UASB) are vastly applied in these countries. However, data related to the application of solar photo-Fenton to improve the quality of effluents from UASB systems are scarce. This review gathered main achievements and limitations associated to the application of solar photo-Fenton at neutral pH and at pilot scale to analyze possible challenges associated to its application as post-treatment of MSE generated by alternative treatments. To this end, the literature review considered studies published in the last decade focusing on CECs removal, toxicity reduction and disinfection via solar photo-Fenton. Physicochemical characteristics of effluents originated after UASB systems alone and followed by a biological post-treatment show significant difference when compared with effluents from conventional activated sludge (CAS) systems. Results obtained for solar photo-Fenton as post-treatment of MSE in developed countries indicate that remaining organic matter and alkalinity present in UASB effluents may pose challenges to the performance of solar advanced oxidation processes (AOPs). This drawback could result in a more toxic effluent. The use of chelating agents such as Fe3+-EDDS to perform solar photo-Fenton at neutral pH was compared to the application of intermittent additions of Fe2+ and both of these strategies were reported as effective to remove CECs from MSE. The latter strategy may be of greater interest in developing countries due to costs associated to complexing agents. In addition, more studies are needed to confirm the efficiency of solar photo-Fenton on the disinfection of effluent from UASB systems to verify reuse possibilities. Finally, future research urges to evaluate the efficiency of solar photo-Fenton at natural pH for the treatment of effluents from UASB systems.
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Affiliation(s)
- Fernando Rodrigues-Silva
- Research Group on Environmental Applications of Advanced Oxidation Processes, Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Maria Clara V M Starling
- Research Group on Environmental Applications of Advanced Oxidation Processes, Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Camila C Amorim
- Research Group on Environmental Applications of Advanced Oxidation Processes, Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil.
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9
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Sun J, Xiao PF, Yin XH, Zhang K, Zhu GN, Brock TCM. Species Sensitivity Distributions of Benthic Macroinvertebrates in Fludioxonil-Spiked Sediment Toxicity Tests. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 82:569-580. [PMID: 35460350 DOI: 10.1007/s00244-022-00933-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
The fungicide fludioxonil, given its physicochemical properties, potentially accumulates and persists in sediments. Fludioxonil has a widespread agricultural use to control various fungal diseases. Its residues may cause toxic effects to benthic aquatic fauna, thereby impacting ecosystem service functions of aquatic ecosystems. To assess the potential environmental effects of fludioxonil in the sediment compartment of edge-of-field surface waters, sediment-spiked single-species toxicity tests with benthic macroinvertebrates were performed. In all experiments artificial sediment was used with an organic carbon content of 2.43% on dry weight basis. The single-species tests were conducted with 8 benthic macroinvertebrates covering different taxonomic groups typical for the Yangtze River Delta, China. The 28d-EC10 and 28-LC10 values thus obtained were used to construct species sensitivity distributions (SSDs). In addition, our dataset was supplemented with 28d-EC10 and 28-LC10 values for 8 different benthic invertebrates from a study in the Netherlands that used field-collected sediment. Based on SSDs constructed with 28d-EC10 or 28d-LC10 values hazardous concentrations to 5% of the species tested (HC5's) were obtained. The HC5 values based on the toxicity tests from China were lower than those from the Netherlands, although 95% confidence bands overlapped. The HC5 values derived from the separate datasets from China and the Netherlands, as well as from the combined dataset, were compared to the Tier-3 Regulatory Acceptable Concentrations (RAC) for fludioxonil and the benthic invertebrate community derived from a sediment-spiked outdoor microcosm experiment conducted in the Netherlands. The HC5 values obtained appeared to be lower than this Tier-3 RAC when expressed in terms of total sediment concentration, but not always when expressed in terms of pore water concentrations.
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Affiliation(s)
- Jian Sun
- College of Advanced Agriculture Science, Zhe Jiang Agriculture and Forestry University, 666 Wu Su Street, Lin'an, Hangzhou, 311300, Zhe Jiang, China
| | - Peng Fei Xiao
- JiYang College of Zhe Jiang Agriculture and Forestry University, 77 Pu Yang road, Zhu Ji, Hang Zhou, 311800, China.
| | - Xiao Hui Yin
- College of Advanced Agriculture Science, Zhe Jiang Agriculture and Forestry University, 666 Wu Su Street, Lin'an, Hangzhou, 311300, Zhe Jiang, China.
| | - Kun Zhang
- Center for Administration of Equine Disease-Free Zone in Tonglu County, Hang Zhou, 311500, China
| | - Guo Nian Zhu
- College of Advanced Agriculture Science, Zhe Jiang Agriculture and Forestry University, 666 Wu Su Street, Lin'an, Hangzhou, 311300, Zhe Jiang, China
- JiYang College of Zhe Jiang Agriculture and Forestry University, 77 Pu Yang road, Zhu Ji, Hang Zhou, 311800, China
| | - Theo C M Brock
- Wageningen Environmental Research, Wageningen University and Research, P.O. Box 47, 6700 AA, Wageningen, The Netherlands
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10
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Rico A, de Oliveira R, Silva de Souza Nunes G, Rizzi C, Villa S, De Caroli Vizioli B, Montagner CC, Waichman AV. Ecological risk assessment of pesticides in urban streams of the Brazilian Amazon. CHEMOSPHERE 2022; 291:132821. [PMID: 34758362 DOI: 10.1016/j.chemosphere.2021.132821] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/05/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
The use of pesticides in households and peri-urban areas of the Amazon has increased notably during the last years. Yet, the presence of these contaminants in Amazonian freshwater ecosystems remains unexplored. Here, we assessed the exposure to 18 pesticides and 5 transformation products in the Amazon River and in the urban streams of Manaus, Santarém, Macapá, and Belém (Brazil). Pesticide concentrations were analyzed by liquid and gas chromatography methods. Ecological risks were assessed following a two-tiered approach. First, hazard quotients and an overall hazard index were calculated using toxicity data for standard test species of primary producers, invertebrates, and fish. Second, the pesticides showing moderate-to-high ecological risks in the first tier were evaluated using Species Sensitivity Distributions (SSDs). Our study shows that pesticides are widespread in urban and peri-urban areas of the Brazilian Amazon. The frequency of detection was higher in urban streams than in the Amazon River, with some samples taken in Manaus, Santarém, and Belém containing up to 8 compounds. Most pesticides were measured at relatively low concentrations (ng L-1), except for malathion, carbendazim and the bulk concentration of chlorpyrifos, which were monitored at concentrations above 100 ng L-1. Based on the first-tier assessment, we found moderate-to-high risks for freshwater invertebrates for malathion, chlorpyrifos, and chlorpyrifos-methyl, and moderate risks for malathion to fish. The risk assessment performed with SSDs indicated high risks of malathion and chlorpyrifos-methyl in urban areas, with up to 15% and 5% of invertebrate species potentially affected, respectively. The bulk concentrations of chlorpyrifos resulted in high risks in some urban areas (14-22% of species affected) and in areas of the main river (32-44%) impacted by agriculture. We conclude that pesticide residues may contribute to a biodiversity impact in the Amazon and should be further monitored in urban and peri-urban areas, particularly after heavy rainfall events.
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Affiliation(s)
- Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Av. Punto Com 2, Alcalá de Henares, 28805, Madrid, Spain; Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, c/ Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain.
| | - Rhaul de Oliveira
- University of Campinas, School of Technology, Rua Paschoal Marmo 1888 - Jd., Nova Itália, Limeira, 13484-332, Brazil
| | - Gabriel Silva de Souza Nunes
- Federal University of Pernambuco, Department of Zoology, Av. Prof Moraes Rego 1235, Cidade Universitária, Recife, 50670-901, Brazil
| | - Cristiana Rizzi
- University of Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), Piazza della Scienza 1, Milan, 20126, Italy
| | - Sara Villa
- University of Milano-Bicocca, Department of Earth and Environmental Sciences (DISAT), Piazza della Scienza 1, Milan, 20126, Italy
| | | | - Cassiana C Montagner
- Institute of Chemistry, University of Campinas, CP 6154, 13083-970, Campinas, SP, Brazil
| | - Andrea Viviana Waichman
- Federal University of the Amazon, Institute of Biological Sciences, Av. Rodrigo Ramos 3000, Manaus, 69077-000, Brazil
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11
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Liess M, Liebmann L, Vormeier P, Weisner O, Altenburger R, Borchardt D, Brack W, Chatzinotas A, Escher B, Foit K, Gunold R, Henz S, Hitzfeld KL, Schmitt-Jansen M, Kamjunke N, Kaske O, Knillmann S, Krauss M, Küster E, Link M, Lück M, Möder M, Müller A, Paschke A, Schäfer RB, Schneeweiss A, Schreiner VC, Schulze T, Schüürmann G, von Tümpling W, Weitere M, Wogram J, Reemtsma T. Pesticides are the dominant stressors for vulnerable insects in lowland streams. WATER RESEARCH 2021; 201:117262. [PMID: 34118650 DOI: 10.1016/j.watres.2021.117262] [Citation(s) in RCA: 90] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/21/2021] [Accepted: 05/12/2021] [Indexed: 05/26/2023]
Abstract
Despite elaborate regulation of agricultural pesticides, their occurrence in non-target areas has been linked to adverse ecological effects on insects in several field investigations. Their quantitative role in contributing to the biodiversity crisis is, however, still not known. In a large-scale study across 101 sites of small lowland streams in Central Europe, Germany we revealed that 83% of agricultural streams did not meet the pesticide-related ecological targets. For the first time we identified that agricultural nonpoint-source pesticide pollution was the major driver in reducing vulnerable insect populations in aquatic invertebrate communities, exceeding the relevance of other anthropogenic stressors such as poor hydro-morphological structure and nutrients. We identified that the current authorisation of pesticides, which aims to prevent unacceptable adverse effects, underestimates the actual ecological risk as (i) measured pesticide concentrations exceeded current regulatory acceptable concentrations in 81% of the agricultural streams investigated, (ii) for several pesticides the inertia of the authorisation process impedes the incorporation of new scientific knowledge and (iii) existing thresholds of invertebrate toxicity drivers are not protective by a factor of 5.3 to 40. To provide adequate environmental quality objectives, the authorisation process needs to include monitoring-derived information on pesticide effects at the ecosystem level. Here, we derive such thresholds that ensure a protection of the invertebrate stream community.
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Affiliation(s)
- Matthias Liess
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany; Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany.
| | - Liana Liebmann
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany; Department Evolutionary Ecology & Environmental Toxicology (E3T), Institute of Ecology, Diversity and Evolution, Faculty of Biological Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Philipp Vormeier
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany; Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany
| | - Oliver Weisner
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany; Institute for Environmental Sciences, University Koblenz-Landau, 76829 Landau, Germany
| | - Rolf Altenburger
- Department of Bioanalytical Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Dietrich Borchardt
- Department Aquatic Ecosystems Analysis and Management, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Werner Brack
- Department Effect-Directed Analysis, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Antonis Chatzinotas
- Department Effect-Directed Analysis, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Beate Escher
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Kaarina Foit
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Roman Gunold
- Department Cell Toxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Sebastian Henz
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | | | - Mechthild Schmitt-Jansen
- Department of Bioanalytical Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Norbert Kamjunke
- Department of River Ecology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Oliver Kaske
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Saskia Knillmann
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Martin Krauss
- Department Effect-Directed Analysis, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Eberhard Küster
- Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany
| | - Moritz Link
- Institute for Environmental Sciences, University Koblenz-Landau, 76829 Landau, Germany
| | - Maren Lück
- Department System-Ecotoxicology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Monika Möder
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Alexandra Müller
- Federal Environmental Agency UBA, Dessau, UFZ, 06844 Dessau-Roßlau, Germany
| | - Albrecht Paschke
- Department of River Ecology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Ralf B Schäfer
- Institute for Environmental Sciences, University Koblenz-Landau, 76829 Landau, Germany
| | - Anke Schneeweiss
- Institute for Environmental Sciences, University Koblenz-Landau, 76829 Landau, Germany
| | - Verena C Schreiner
- Institute for Environmental Sciences, University Koblenz-Landau, 76829 Landau, Germany
| | - Tobias Schulze
- Department Effect-Directed Analysis, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Gerrit Schüürmann
- Department of Ecological Chemistry, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Wolf von Tümpling
- Department of River Ecology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Markus Weitere
- Department of River Ecology, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
| | - Jörn Wogram
- Federal Environmental Agency UBA, Dessau, UFZ, 06844 Dessau-Roßlau, Germany
| | - Thorsten Reemtsma
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research, UFZ, 04318 Leipzig, Germany
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12
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Bijlsma L, Pitarch E, Hernández F, Fonseca E, Marín JM, Ibáñez M, Portolés T, Rico A. Ecological risk assessment of pesticides in the Mijares River (eastern Spain) impacted by citrus production using wide-scope screening and target quantitative analysis. JOURNAL OF HAZARDOUS MATERIALS 2021; 412:125277. [PMID: 33951870 DOI: 10.1016/j.jhazmat.2021.125277] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/15/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
The widespread use of pesticides, especially in agricultural areas, makes necessary to control their presence in surrounding surface waters. The current study was designed to investigate the occurrence and ecological risks of pesticides and their transformation products in a Mediterranean river basin impacted by citrus agricultural production. Nineteen sites were monitored in three campaigns distributed over three different seasons. After a qualitative screening, 24 compounds was selected for subsequent quantitative analysis. As expected, the lower section of the river was most contaminated, with total concentration >5 µg/L in two sites near to the discharge area of wastewater treatment plants. The highest concentrations were found in September, after agricultural applications and when the river flow is reduced. Ecological risks were calculated using two mixture toxicity approaches (Toxic Unit and multi-substance Potentially Affected Fraction), which revealed high acute and chronic risks of imidacloprid to invertebrates, moderate-to-high risks of diuron, simazine and 2,4-D for primary producers, and moderate-to-high risks of thiabendazole for invertebrates and fish. This study shows that intensive agricultural production and the discharge of wastewater effluents containing pesticide residues from post-harvest citrus processing plants are threatening freshwater biodiversity. Further actions are recommended to control pesticide use and to reduce emissions.
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Affiliation(s)
- Lubertus Bijlsma
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, Castellón E-12071, Spain
| | - Elena Pitarch
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, Castellón E-12071, Spain.
| | - Félix Hernández
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, Castellón E-12071, Spain
| | - Eddie Fonseca
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, Castellón E-12071, Spain; Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, P.O. 2060, San José, Costa Rica
| | - José M Marín
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, Castellón E-12071, Spain
| | - María Ibáñez
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, Castellón E-12071, Spain
| | - Tania Portolés
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, Castellón E-12071, Spain
| | - Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, Alcalá de Henares, Madrid 28805, Spain; Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Valencia 46980, Spain
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13
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Merga LB, Mengistie AA, Alemu MT, Van den Brink PJ. Biological and chemical monitoring of the ecological risks of pesticides in Lake Ziway, Ethiopia. CHEMOSPHERE 2021; 266:129214. [PMID: 33310518 DOI: 10.1016/j.chemosphere.2020.129214] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/21/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Lake Ziway, a freshwater lake located in Ethiopia, is under the pressure of pesticide and nutrient pollution due to agricultural activity and urbanization. This study has analysed concentrations of insecticides, fungicides and nutrients in water and sediment samples of Lake Ziway taken in the wet and dry season at 13 sites expected to be under different environmental stress and assessed their expected ecological impacts. Malathion, dimethoate, metalaxyl, diazinon, chlorpyrifos, fenitrothion and endosulfan were detected in more than half of the water samples, while diazinon, α-cypermethrin and endosulfan were frequently detected (>25%) in sediment samples. Higher levels of physicochemical parameters were observed at sample locations proximate to agricultural and urban activities. Risk quotients (RQ) and multi-substance Potentially Affected Fraction (msPAFRA) were calculated to assess the ecological risk of individual and mixture of pesticides, respectively. The majority of the pesticides detected in the water of the lake showed a potential acute risk (RQ > 1), specifically the insecticides chlorpyrifos, λ-cyhalothrin and α-cypermethrin for which high potential acute risks were calculated using a 2nd tier risk assessment. Levels of pesticides in sediment showed low ecological risks. Arthropods and fishes are expected to be highly affected by mixtures of pesticides (msPAFRA = < 1-80%) detected at locations that are proximate to smallholders' farms, and receive largescale farms' wastewater and at sites where inflow rivers join the lake. Macroinvertebrates based redundancy analysis showed the effectiveness of EPT richness to assess ecological status of the lake. Training for smallholder farmers on pesticides safety and usage, and implementation of improved effluent management mechanisms by floriculture farms are urgently needed intervention measures to reduce the pollution.
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Affiliation(s)
- Lemessa B Merga
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, the Netherlands; Department of Chemistry, Ambo University, P.O. Box 240, Ambo, Ethiopia
| | | | - Miresa T Alemu
- Department of Chemistry, Ambo University, P.O. Box 240, Ambo, Ethiopia
| | - Paul J Van den Brink
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, the Netherlands; Wageningen Environmental Research, P.O. Box 47, 6700 AA, Wageningen, the Netherlands.
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14
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Rico A, Dafouz R, Vighi M, Rodríguez-Gil JL, Daam MA. Use of Postregistration Monitoring Data to Evaluate the Ecotoxicological Risks of Pesticides to Surface Waters: A Case Study with Chlorpyrifos in the Iberian Peninsula. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:500-512. [PMID: 33179800 DOI: 10.1002/etc.4927] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/08/2020] [Accepted: 11/09/2020] [Indexed: 05/08/2023]
Abstract
Chemical monitoring data sets such as those provided by the implementation of the Water Framework Directive (WFD) offer opportunities to evaluate the ecological risks of pesticides under large spatiotemporal scales and to evaluate the protectiveness of the current prospective risk-assessment framework. As a case study, we used the monitoring data set for the insecticide chlorpyrifos to perform a probabilistic risk assessment for Iberian surface-water ecosystems. The specific objectives of the study were 1) to assess the occurrence of chlorpyrifos in relation to different agricultural production land uses, 2) to assess the spatiotemporal variation in the exceedance of the European WFD short- and long-term environmental quality standards (maximum allowable concentration environmental quality standard [MAC-EQS] and annual average [AA] EQS), and 3) to perform a probabilistic risk assessment for freshwater invertebrates. A database that contains chlorpyrifos concentrations from 14 600 surface water samples taken between 2012 and 2017 in the Iberian Peninsula (Spain and Portugal) was analyzed, and chlorpyrifos was detected in 21% of these samples. The MAC-EQS was exceeded in 2% of the cases, whereas the AA-EQS was exceeded in 18% of the cases. The majority of the exceedances took place in the littoral areas of the eastern and southeastern parts of the Iberian Peninsula, particularly in areas with dominant citrus production during late spring, late summer, and autumn. The present study indicates unacceptable risks posed by chlorpyrifos to Iberian surface waters over the study period, although it was approved for use in Europe. The present study supports the need to perform further postregistration monitoring assessments with other pesticides following similar approaches, which can help to identify possible pesticide-misuse practices and improvements of the prospective risk-assessment framework. Environ Toxicol Chem 2021;40:500-512. © 2020 SETAC.
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Affiliation(s)
- Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Raquel Dafouz
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Marco Vighi
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - José Luis Rodríguez-Gil
- IISD-Experimental Lakes Area, Winnipeg, Manitoba, Canada
- Department of Environment and Geography, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Michiel A Daam
- CENSE, Department of Environmental Sciences and Engineering, Faculty of Sciences and Technology, New University of Lisbon, Quinta da Torre, Caparica, Portugal
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15
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Wytinck N, Manchur CL, Li VH, Whyard S, Belmonte MF. dsRNA Uptake in Plant Pests and Pathogens: Insights into RNAi-Based Insect and Fungal Control Technology. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1780. [PMID: 33339102 PMCID: PMC7765514 DOI: 10.3390/plants9121780] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/07/2020] [Accepted: 12/13/2020] [Indexed: 12/11/2022]
Abstract
Efforts to develop more environmentally friendly alternatives to traditional broad-spectrum pesticides in agriculture have recently turned to RNA interference (RNAi) technology. With the built-in, sequence-specific knockdown of gene targets following delivery of double-stranded RNA (dsRNA), RNAi offers the promise of controlling pests and pathogens without adversely affecting non-target species. Significant advances in the efficacy of this technology have been observed in a wide range of species, including many insect pests and fungal pathogens. Two different dsRNA application methods are being developed. First, host induced gene silencing (HIGS) harnesses dsRNA production through the thoughtful and precise engineering of transgenic plants and second, spray induced gene silencing (SIGS) that uses surface applications of a topically applied dsRNA molecule. Regardless of the dsRNA delivery method, one aspect that is critical to the success of RNAi is the ability of the target organism to internalize the dsRNA and take advantage of the host RNAi cellular machinery. The efficiency of dsRNA uptake mechanisms varies across species, and in some uptake is negligible, rendering them effectively resistant to this new generation of control technologies. If RNAi-based methods of control are to be used widely, it is critically important to understand the mechanisms underpinning dsRNA uptake. Understanding dsRNA uptake mechanisms will also provide insight into the design and formulation of dsRNAs for improved delivery and provide clues into the development of potential host resistance to these technologies.
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Affiliation(s)
| | | | | | | | - Mark F. Belmonte
- Department of Biological Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (N.W.); (C.L.M.); (V.H.L.); (S.W.)
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16
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Onwona-Kwakye M, Hogarh JN, Van den Brink PJ. Environmental risk assessment of pesticides currently applied in Ghana. CHEMOSPHERE 2020; 254:126845. [PMID: 32334242 DOI: 10.1016/j.chemosphere.2020.126845] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 04/17/2020] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
Registration of pesticides for use in Ghana is based on prospective environmental risk assessment (ERA) to assess the risks of future pesticide use on the environment. The present study evaluated whether pesticides currently used by Ghanaian farmers may harm the aquatic and terrestrial environment under day-to-day farm practice by performing a 1st tier ERA for terrestrial and aquatic environment and a 2nd tier ERA for the aquatic environment using existing scenarios and models. Results of the 1st tier risk assessment indicated that in the investigated regions in south Ghana, many pesticides might pose an acute risk to aquatic ecosystems adjacent to the treated fields while lambda cyhalothrin, chlorpyrifos, cypermethrin, dimethoate, mancozeb, carbendazim, sulphur, maneb and copper hydroxide may pose the highest chronic risks. Butachlor, dimethoate and carbendazim may pose acute risks to the terrestrial soil ecosystem, while glyphosate, chlorpyrifos, imidacloprid, dimethoate, mancozeb, carbendazim, maneb, copper hydroxide and cuprous oxide may pose the highest chronic risks. Many insecticides and some fungicides may pose acute risks to bees and terrestrial non-target arthropods. The 2nd tier acute aquatic risk assessment showed that most risks were substantiated using species sensitivity distribution (SSD). Actual pesticide use was a factor of 1.3-13 times higher than the recommended label instructions, indicating a general practice of overdosing. The case study shows that the PRIMET model in combination with the SSD concept may offer pesticide registration authorities in Ghana a means to assess environmental risks associated with pesticide usage in a user-friendly and cost-effective manner.
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Affiliation(s)
- Michael Onwona-Kwakye
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700, AA, the Netherlands; Environmental Protection Agency, P. O. Box M326, Accra, Ghana
| | - Jonathan N Hogarh
- Department of Environmental Science, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Paul J Van den Brink
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700, AA, the Netherlands; Wageningen Environmental Research, P.O. Box 47, 6700, AA, the Netherlands.
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17
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Han G, Yan S, Fan B. Regional Regulations and Public Safety Perceptions of Quality-of-Life Issues: Empirical Study on Food Safety in China. Healthcare (Basel) 2020; 8:healthcare8030275. [PMID: 32824174 PMCID: PMC7551224 DOI: 10.3390/healthcare8030275] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/05/2020] [Accepted: 08/10/2020] [Indexed: 11/22/2022] Open
Abstract
In many developing countries, the public is shifting its focus from economic growth to quality-of-life issues. As a result, there is extensive demand for better public administration of quality-of-life issues, ranging from air pollution to food safety problems, that threaten ordinary peoples’ health and daily lives. This article analyzes the determinants of public perceptions of food safety and the administrative effects of regional governance in different provinces with nationwide survey data. A two-level hierarchical linear regression model (HLM) with provincial factors as background-level variables and demographic factors as individual-level variables was developed to measure the influence of these factors on public perceptions of food safety. The results showed that female, young, and well-educated urban residents perceived greater risks to food safety than other groups. Administrative fiscal expenditures and local normative documents in different provinces did not have significant effects on public perceptions of food safety. However, food safety inspections weakened public perceptions of food safety. We thereby suggest that provincial governments invest in more efficient food safety projects and enhance the publicity of normative documents in popular media.
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18
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Brock TCM, Romão J, Yin X, Osman R, Roessink I. Sediment toxicity of the fungicide fludioxonil to benthic macroinvertebrates -evaluation of the tiered effect assessment procedure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 195:110504. [PMID: 32220792 DOI: 10.1016/j.ecoenv.2020.110504] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 03/09/2020] [Accepted: 03/16/2020] [Indexed: 06/10/2023]
Abstract
28-Day sediment-spiked laboratory toxicity tests with eight benthic macroinvertebrates and the lipophilic fungicide fludioxonil were conducted to verify the proposed tiered sediment effect assessment procedure as recommended by the European Food Safety Authority (EFSA). The test species were the oligochaetes Lumbriculus variegatus and Tubifex tubifex, the insects Chironomus riparius and Caenis horaria, the crustaceans Hyalella azteca and Asellus aquaticus and the bivalves Corbicula fluminalis and Pisidium amnicum. Toxicity estimates were expressed in terms of total concentration of dry sediment as well as in pore water concentration. Field-collected sediment, also used in a previously performed sediment-spiked microcosm experiment, was used in tests with all species. L. variegatus and C. riparius had similar lowest 28d-L(E)C10 values when expressed in terms of total sediment concentration, but in terms of pore water concentration L. variegatus was more sensitive. Three of the six additional benthic test species (A. aquaticus, C. horaria, C. fluminalis) had 28d-EC10 values a factor of 2-6 lower than that of L. variegatus. Comparing different effect assessment tiers for sediment organisms, i.e. Tier-0 (Modified Equilibrium Partitioning approach), Tier-1 (Standard Test Species approach), Tier-2 (Species Sensitivity Distribution (SSD) approach) and Tier-3 (Model Ecosystem approach), it is concluded that the tiers based on sediment-spiked laboratory toxicity tests provide sufficient protection when compared with the Tier-3 Regulatory Acceptable Concentration (RAC). Differences between Tier-1 and Tier-2 RACs, however, appear to be relatively small and not always consistent, irrespective of expressing the RAC in terms of total sediment or pore water concentration. Derivation of RACs by means of the SSD approach may be a challenge, because it is difficult obtaining a sufficient number of valid chronic EC10 values with appropriate 95% confidence bands for sediment-dwelling macroinvertebrates. Therefore, this paper proposes a Tier-2 Weight-of-Evidence approach to be used in case an insufficient number of valid additional toxicity data is made available. Similar studies with pesticides that differ in fate properties and toxic mode-of-action are necessary for further validation of the tiered effect assessment approach for sediment organisms.
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Affiliation(s)
- Theo C M Brock
- Wageningen Environmental Research, Wageningen University and Research, P.O. Box 47, 6700, AA Wageningen, the Netherlands
| | - João Romão
- Wageningen Environmental Research, Wageningen University and Research, P.O. Box 47, 6700, AA Wageningen, the Netherlands; Current Address: Department of Biology, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Xiao Yin
- Wageningen Environmental Research, Wageningen University and Research, P.O. Box 47, 6700, AA Wageningen, the Netherlands; Current Address: Zhe Jiang Agriculture and Forestry University, College of Agricultural and Food Science, 88 North Road of Huan Cheng, Lin'an, Hangzhou, Zhe Jiang, 311300, China
| | - Rima Osman
- Wageningen Environmental Research, Wageningen University and Research, P.O. Box 47, 6700, AA Wageningen, the Netherlands
| | - Ivo Roessink
- Wageningen Environmental Research, Wageningen University and Research, P.O. Box 47, 6700, AA Wageningen, the Netherlands.
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