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V M Starling MC, Rodrigues DAS, Miranda GA, Jo S, Amorim CC, Ankley GT, Simcik M. Occurrence and potential ecological risks of PFAS in Pampulha Lake, Brazil, a UNESCO world heritage site. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 948:174586. [PMID: 38997014 DOI: 10.1016/j.scitotenv.2024.174586] [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: 05/10/2024] [Revised: 06/30/2024] [Accepted: 07/05/2024] [Indexed: 07/14/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) comprise >4000 synthetic substances used in industrial applications and consumer products. PFAS used daily in households and manufacturing plants end up in domestic sewage, and industrial effluents can be discharged to surface water. Urban watersheds located in low and middle-income countries (LMIC), which lack sanitation infrastructure, are potential recipients of waste containing PFAS. Yet, only a few studies report PFAS occurrence in urban reservoirs and lakes, especially those located in the Global South due to resource limitations. This is the first study aimed to assess PFAS occurrence and ecological risks in Pampulha Lake, Brazil, a site which represents the reality of many other urban watersheds in LMIC as it is surrounded by densely populated areas and manufacturing plants. Surface water samples were collected monthly for 1 year from four sampling points at Pampulha Lake. Sample analysis was based on US Environmental Protection Agency Method 1633, which employs solid phase extraction followed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). Species sensitivity distribution (SSD) curves were built to identify potentially susceptible species based on detected water concentrations. Bioaccumulation was estimated for fish tissue. Short-chain (perfluorobutanesulfonic acid, PFBS and perfluorohexanoic acid, PFHxA) and long-chain PFAS (perfluorodecanoic acid, PFDA; perfluorooctanoic acid, PFOA; perfluorododecanoic acid, PFDoA; and perfluorooctanesulfonic acid, PFOS) were detected at the μg L-1 range. Total PFAS concentrations in the wet season were generally higher than in the dry season, likely due to limited capacity of the treatment plant processing water from tributaries which receive raw sewage. More than 5 % of aquatic species are potentially susceptible to chronic effects of PFOS at detected concentrations (0.2-2.2 μg L-1). Predicted bioaccumulation of PFOS in fish was above advisory diet intake levels for humans. Results emphasize the need for studies related to PFAS occurrence in watersheds located in LMIC.
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Affiliation(s)
- Maria Clara V M Starling
- Universidade Federal de Minas Gerais, Department of Sanitary and Environmental Engineering, Research Group on Environmental Applications of Advanced Oxidation Processes, Av. Presidente Antônio Carlos 6627, Escola de Engenharia, Belo Horizonte 31270-901, MG, Brazil.
| | - Daniel A S Rodrigues
- Universidade Federal de Minas Gerais, Department of Sanitary and Environmental Engineering, Research Group on Environmental Applications of Advanced Oxidation Processes, Av. Presidente Antônio Carlos 6627, Escola de Engenharia, Belo Horizonte 31270-901, MG, Brazil
| | - Gisele A Miranda
- Universidade Federal de Minas Gerais, Department of Sanitary and Environmental Engineering, Research Group on Environmental Applications of Advanced Oxidation Processes, Av. Presidente Antônio Carlos 6627, Escola de Engenharia, Belo Horizonte 31270-901, MG, Brazil
| | - Suna Jo
- University of Minnesota, School of Public Health, 420 Delaware St SE, MMC 807, Minneapolis, MN 55455, USA
| | - Camila C Amorim
- Universidade Federal de Minas Gerais, Department of Sanitary and Environmental Engineering, Research Group on Environmental Applications of Advanced Oxidation Processes, Av. Presidente Antônio Carlos 6627, Escola de Engenharia, Belo Horizonte 31270-901, MG, Brazil
| | - Gerald T Ankley
- US Environmental Protection Agency, Office of Research and Development, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd, Duluth, MN 55804, USA
| | - Matt Simcik
- University of Minnesota, School of Public Health, 420 Delaware St SE, MMC 807, Minneapolis, MN 55455, USA
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Dos Santos A, Umbuzeiro GDA. Proposal of a chronic toxicity test using the tropical epibenthic amphipod Parhyale hawaiensis. MARINE POLLUTION BULLETIN 2023; 194:115375. [PMID: 37579598 DOI: 10.1016/j.marpolbul.2023.115375] [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: 04/04/2023] [Revised: 07/30/2023] [Accepted: 08/02/2023] [Indexed: 08/16/2023]
Abstract
Chronic toxicity tests with representative organisms are essential for ecological risk assessment. The circumtropical marine amphipod Parhyale hawaiensis is a promising test organism in ecotoxicology. This study aimed to develop a chronic toxicity protocol for liquid samples testing with P. hawaiensis using reproduction and growth as endpoints. In the proposed protocol, organisms (≤52 days old) are placed in 5 replicates each containing 100 mL of solution, 10 organisms, and 5 g of crushed coral for 42 days of exposure. The protocol was successfully developed but reproduction showed better performance than growth rate. NOECs based on reproduction were determined for zinc (0.10 mg Zn L-1) and 3,4-DCA (0.50 mg L-1), and they are of the same order of magnitude compared with the values of other amphipods. The developed test based on reproduction can be considered a promising tool for hazard characterizations although more tests with different substances are still needed.
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Affiliation(s)
- Amanda Dos Santos
- School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil; School of Technology, University of Campinas, Limeira, SP, Brazil
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Castelhano Gebara R, de Oliveira Gonçalves Alho L, Bruno de Abreu C, da Silva Mansano A, Moreira RA, Swerts Rocha G, Gama Melão MDG. Toxicity and Risk Assessment of Zinc and Aluminum Mixtures to Ceriodaphnia silvestrii (Crustacea: Cladocera). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:2912-2922. [PMID: 34265115 DOI: 10.1002/etc.5162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/02/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
Despite the co-occurrence of metals in aquatic environments, their joint effects are generally not considered during risk assessments. Data on the combined effects of zinc (Zn) and aluminum (Al) on aquatic animals are extremely scarce in the literature, although these metals are commonly used in domestic and industrial activities. In the present study, we investigated the effects of mixtures of Zn and Al on the cladoceran Ceriodaphnia silvestrii. We evaluated immobility (at 48 h) and ingestion rates (at 24 h). We also performed chronic toxicity tests for single metals. The environmental risks of these substances for tropical freshwaters were estimated from the risk quotient (measured environmental concentration/predicted no-effect concentration). In immobility tests, our results showed a 48-h median effect concentration (EC50) of 0.22 mg Zn L-1 and 0.52 mg Al L-1 , and we observed synergistic effects of Zn and Al, following the independent action model. The ingestion rates of C. silvestrii were inhibited at 0.1, 0.4, and 0.5 mg Al L-1 , and they were increased at 0.08 mg Zn L-1 ; we observed antagonistic effects in all treatments combined with 0.5 mg Al L-1 . In terms of chronic toxicity, a 7-d EC50 occurred at 0.11 mg Zn L-1 and 0.37 mg Al L-1 . The risk assessment suggests a potential risk of these metals at environmentally relevant concentrations, especially when in a mixture. Therefore, we recommend mixture toxicity tests during risk assessments to ensure that zooplankton are protected. Environ Toxicol Chem 2021;40:2912-2922. © 2021 SETAC.
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Affiliation(s)
- Renan Castelhano Gebara
- Department of Hydrobiology. Universidade Federal de São Carlos. São Carlos, São Paulo, Brazil
- Postgraduate Program in Ecology and Natural Resources, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Lays de Oliveira Gonçalves Alho
- Department of Hydrobiology. Universidade Federal de São Carlos. São Carlos, São Paulo, Brazil
- Postgraduate Program in Ecology and Natural Resources, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Cínthia Bruno de Abreu
- Department of Hydrobiology. Universidade Federal de São Carlos. São Carlos, São Paulo, Brazil
- Postgraduate Program in Ecology and Natural Resources, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Adrislaine da Silva Mansano
- Department of Hydrobiology. Universidade Federal de São Carlos. São Carlos, São Paulo, Brazil
- Postgraduate Program in Ecology and Natural Resources, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Raquel Aparecida Moreira
- Núcleo de Estudos em Ecossistemas Aquáticos (NEEA)/Centro de Recursos Hídricos e Estudos Ambientais (CRHEA)/Departamento de Hidráulica e Saneamento (SHS), São Carlos School of Engineering, Universidade de São Paulo, São Carlos, Brazil
| | - Giseli Swerts Rocha
- Núcleo de Estudos em Ecossistemas Aquáticos (NEEA)/Centro de Recursos Hídricos e Estudos Ambientais (CRHEA)/Departamento de Hidráulica e Saneamento (SHS), São Carlos School of Engineering, Universidade de São Paulo, São Carlos, Brazil
| | - Maria da Graça Gama Melão
- Department of Hydrobiology. Universidade Federal de São Carlos. São Carlos, São Paulo, Brazil
- Postgraduate Program in Ecology and Natural Resources, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
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Cristiano W, Giacoma C, Carere M, Mancini L. Chemical pollution as a driver of biodiversity loss and potential deterioration of ecosystem services in Eastern Africa: A critical review. S AFR J SCI 2021. [DOI: 10.17159/sajs.2021/9541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Chemical pollution, i.e. the release of anthropogenic chemical substances into the environment, is a driver of biodiversity loss. Although this issue has been widely investigated in high-income countries of temperate regions, there is a lack of data for tropical areas of middle- or low-income countries, such as those in Eastern Africa. Some of the world’s richest biomes that are affected by multiple pressures, including chemical pollution, are hosted in this macro-region. However, few studies have addressed the impact of the release of anthropogenic chemical pollutants on the biodiversity, and the related potential implications for the deterioration of ecosystem goods and services in this area. A contribution in systemising the scientific literature related to this topic is, therefore, urgently needed. We reviewed studies published from 2001 to 2021, focusing on the chemical pollution impact on Eastern African wildlife. Despite an extensive literature search, we found only 43 papers according to our survey methods. We focused on wildlife inhabiting terrestrial ecosystems and inland waters. According to our search, Kenya and Uganda are the most represented countries accounting for about half of the total number of reviewed articles. Moreover, 67.4% of the studies focus on inland waters. The spread of anthropogenic chemicals into tropical areas, e.g. Eastern Africa, and their effects on living organisms deserve greater attention in research and politics. We report a weak increasing trend in publishing studies addressing this topic that might bode well. The combined effort of science and governments is crucial in improving the management of chemical pollutants in the environment for achieving the goals of biodiversity conservation.
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Affiliation(s)
- Walter Cristiano
- Unit of Ecosystems and Health, Department of Environment and Health, Italian National Institute of Health, Rome, Italy
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Cristina Giacoma
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Mario Carere
- Unit of Ecosystems and Health, Department of Environment and Health, Italian National Institute of Health, Rome, Italy
| | - Laura Mancini
- Unit of Ecosystems and Health, Department of Environment and Health, Italian National Institute of Health, Rome, Italy
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Establishing the baselines of Diplolaimella dievengatensis (Nematoda: Monhysteridae) for life-history experiments. ZOOL ANZ 2021. [DOI: 10.1016/j.jcz.2021.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Nilin J, Santana LMBM, Silva A, Costa-Lotufo LV. Biological responses of mangrove oysters (Crassostrea rhizophorae) and mercury contamination in an urban tropical estuary. MARINE POLLUTION BULLETIN 2021; 166:112233. [PMID: 33740657 DOI: 10.1016/j.marpolbul.2021.112233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/17/2021] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
This study aimed to assess the biological responses of oysters from an urban estuary in Northeast Brazil, through the evaluation of biochemical and physiological biomarkers, and integrate these responses with the investigation of mercury seasonal contamination. Oysters and sediment were collected from three sites in the estuary of the Ceará River during dry and rainy seasons. Biomarkers (AchE, CaE, GST, CAT, and Condition Index) were analyzed in different tissues. Hg bioaccumulation was higher in animals sampled in the rainy season, with increases varying from 5% to 136%, compared to the dry season. The changes in biomarkers highlight already elevated stresses for the organisms at the inner portion of the estuary, near the confluence with the Maranguapinho River, mainly during the rainy season, corroborating other studies that showed ecotoxicological effects with water and sediment samples. Finally, no correlation between Hg in sediment/oyster and biomarker results was observed.
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Affiliation(s)
- Jeamylle Nilin
- Instituto de Biologia, Universidade Federal de Uberlândia, Av. Ceará, s/n Bloco D sala 28, 38405-302 Uberlândia, Minas Gerais, Brazil.
| | - Lígia M B M Santana
- Instituto de Ciências do Mar (Labomar) Universidade Federal do Ceará, Av. Abolição 3205, 60165-081 Fortaleza, Ceará, Brazil; Center for Environmental and Marine Studies (CESAM), Aveiro University (UA), 3810-193 Aveiro, Portugal
| | - Allyson Silva
- Instituto de Ciências do Mar (Labomar) Universidade Federal do Ceará, Av. Abolição 3205, 60165-081 Fortaleza, Ceará, Brazil
| | - Leticia Veras Costa-Lotufo
- Departamento de Farmacologia, Instituto de Ciências Biomédicas (ICB), Universidade de São Paulo (USP), Av. Lineu Prestes 1524, Prédio Biomédicas I, sala 213 Butantã, 05508900 São Paulo, SP, Brazil
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Cornejo A, Encina-Montoya F, Correa-Araneda F, Rovira D, García G, Nieto C, Villarreal V, Jaramillo N, Pérez E, Valderrama A, Pérez J, Boyero L. High sensitivity of invertebrate detritivores from tropical streams to different pesticides. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 216:112226. [PMID: 33848739 DOI: 10.1016/j.ecoenv.2021.112226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/27/2021] [Accepted: 03/31/2021] [Indexed: 06/12/2023]
Abstract
Freshwater organisms are often sensitive to pesticides, but their sensitivity varies across different taxa and with pesticide type and action mode, as shown by multiple acute toxicity tests. Such variability hampers predictions about how freshwater ecosystems may be altered by pesticide toxicity, which is especially critical for understudied areas of the world such as the tropics. Furthermore, there is little information about the sensitivity of some organisms that are key components of stream food webs; this is the case of litter-feeding detritivorous invertebrates, which contribute to the fundamental process of litter decomposition. Here, we examined the sensitivity of three common detritivores [Anchytarsus sp. (Coleoptera: Ptilodactylidae), Hyalella sp. (Amphipoda: Hyalellidae) and Lepidostoma sp. (Trichoptera: Lepidostomatidae)] to three pesticides commonly used (the insecticides bifenthrin and chlorpyrifos and the fungicide chlorothalonil) using acute (48 or 96 h) toxicity tests. Our study demonstrates that common-use pesticides provoke the mortality of half their populations at concentrations of 0.04-2.7 μg L-1. We found that all species were sensitive to the three pesticides, with the highest sensitivity found for chlorpyrifos. Additionally, we used the approach of species sensitivity distributions (SSD) to compare our study species with Daphnia magna and other temperate and tropical invertebrates. We found that the study species were among the most sensitive species to chlorpyrifos and chlorothalonil. Our results suggest that tropical detritivores merit special attention in ecological risk assessment of pesticides and highlight the need for accurate ecotoxicological information from ecologically relevant species in the tropics.
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Affiliation(s)
- Aydeé Cornejo
- Aquatic Ecology and Ecotoxicology Laboratory, Zoological Collection Eustorgio Mendez, Gorgas Memorial Institute of Health Studies, (COZEM-ICGES), Ave. Justo Arosemena and Calle 35, 0816-02593 Panama City, Panama.
| | - Francisco Encina-Montoya
- Núcleo de Estudios Ambientales, Departamento de Ciencias Ambientales, Facultad de Recursos Naturales, Universidad Católica de Temuco, 4780000 Temuco, Chile
| | - Francisco Correa-Araneda
- Unidad de Cambio Climático y Medio Ambiente (UCCMA), Instituto Iberoamericano de Desarrollo Sostenible (IIDS), Universidad Autónoma de Chile, Temuco, Chile
| | - Dalys Rovira
- Water Laboratory and Physicochemical Services (LASEF), Autonomous University of Chiriqui, David City, Panama
| | - Gabriela García
- Aquatic Ecology and Ecotoxicology Laboratory, Zoological Collection Eustorgio Mendez, Gorgas Memorial Institute of Health Studies, (COZEM-ICGES), Ave. Justo Arosemena and Calle 35, 0816-02593 Panama City, Panama
| | - Carlos Nieto
- Aquatic Ecology and Ecotoxicology Laboratory, Zoological Collection Eustorgio Mendez, Gorgas Memorial Institute of Health Studies, (COZEM-ICGES), Ave. Justo Arosemena and Calle 35, 0816-02593 Panama City, Panama
| | - Víctor Villarreal
- Water Laboratory and Physicochemical Services (LASEF), Autonomous University of Chiriqui, David City, Panama
| | - Nicomedes Jaramillo
- Research Center for Natural Products and Biotechnology (CIPNABIOT), Autonomous University of Chiriqui, David City, Panama
| | - Edgar Pérez
- Aquatic Ecology and Ecotoxicology Laboratory, Zoological Collection Eustorgio Mendez, Gorgas Memorial Institute of Health Studies, (COZEM-ICGES), Ave. Justo Arosemena and Calle 35, 0816-02593 Panama City, Panama
| | - Anayansi Valderrama
- Aquatic Ecology and Ecotoxicology Laboratory, Zoological Collection Eustorgio Mendez, Gorgas Memorial Institute of Health Studies, (COZEM-ICGES), Ave. Justo Arosemena and Calle 35, 0816-02593 Panama City, Panama
| | - Javier Pérez
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Luz Boyero
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain; IKERBASQUE, Bilbao, Spain
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Raymundo LB, Rocha O, Moreira RA, Miguel M, Daam MA. Sensitivity of tropical cladocerans to chlorpyrifos and other insecticides as compared to their temperate counterparts. CHEMOSPHERE 2019; 220:937-942. [PMID: 33395815 DOI: 10.1016/j.chemosphere.2019.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/31/2018] [Accepted: 01/02/2019] [Indexed: 05/25/2023]
Abstract
The use of temperate toxicity data in tropical risk assessments has often been disputed. Previous sensitivity comparisons between temperate and tropical species, however, have not shown a consistent sensitivity difference between climatically-distinct species. Such comparisons were often limited by a small tropical toxicity dataset. In addition, differences in the taxonomic compositions of the temperate and tropical species assemblages used to construct species sensitivity distributions curves also hampered direct comparisons (e.g. type and ration of crustaceans and insects). The aim of the present study was to compare the sensitivity of temperate and tropical cladocerans to insecticides. Acute laboratory toxicity tests were conducted with five Neotropical cladocerans exposed to a concentration series of the insecticide chlorpyrifos. Subsequently, their EC50 values were compared with those reported in the literature for non-tropical cladocerans. An additional literature toxicity data search for insecticides other than chlorpyrifos was also conducted for both temperate and tropical cladocerans to enable a comparison for a wider range of insecticides and taxa. The order of sensitivity of the native cladocerans to chlorpyrifos was Ceriodaphnia silvestrii (0.039 μg L-1) > Diaphanosoma birgei (0.211 μg L-1) = Daphnia laevis (0.216 μg L-1) > Moina micrura (0.463 μg L-1) = Macrothrix flabelligera (0.619 μg L-1). A regulatory acceptable concentration based on temperate cladoceran toxicity data of both chlorpyrifos and other insecticides also appeared to be sufficiently protective for tropical cladoceran species. Implications for the use of temperate toxicity data in tropical risk assessments and indications for tropical cladoceran test species selection are discussed.
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Affiliation(s)
- Larissa Broggio Raymundo
- Department of Ecology and Evolutionary Biology, Federal University of São Carlos, Rodovia Washington Luis, km 235, 13565-905, São Carlos, SP, Brazil
| | - Odete Rocha
- Department of Ecology and Evolutionary Biology, Federal University of São Carlos, Rodovia Washington Luis, km 235, 13565-905, São Carlos, SP, Brazil
| | - Raquel Aparecida Moreira
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil.
| | - Mariana Miguel
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil
| | - Michiel Adriaan Daam
- CENSE, Department of Environmental Sciences and Engineering, Faculty of Sciences and Technology, New University of Lisbon, Quinta da Torre, 2829-516 Caparica, Portugal
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Heidari H, Yosefi M, Sasani S, Nosratti I. Effect of irrigation with detergent-containing water on foxtail millet shoot biomass and ion accumulation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:6328-6335. [PMID: 30617893 DOI: 10.1007/s11356-018-3966-y] [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: 06/21/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
Water shortage leads farmers to use sewages for irrigation. Sewages contain a large amount of laundry detergent. In this study the impact of irrigation by contaminated water on shoot biomass and seed germination of foxtail millet (Setaria italica) was investigated. The research was conducted as laboratory and pot experiments. Iso-potentials (- 0.042, - 0.077, and - 0.415 MPa) of polyethylene glycol (PEG, water deficit treatment) and laundry detergent (contamination treatment) made the laboratory experiment treatments. The pot experiment included contamination factor (0, 0.1, 1, and 10 g L-1 of laundry detergent) and deficit irrigation factor (irrigation interval of 1, 2, and 3 days). Results of this study showed that at the iso-potential, laundry detergent had more negative effect on seed germination traits when compared with PEG. There was no germination at - 0.415 MPa of laundry detergent. Both drought and contamination reduced dry forage yield, plant height, leaf number, leaf area, leaf dry and fresh weight, stem dry, and fresh weight. Detergent concentration of 10 g L-1 with irrigation interval of 3 days had a forage yield reduction of 63% compared to control (laundry detergent concentration of 0 g L-1 with irrigation interval of 1 day). Detergent concentration of 10 g L-1 with irrigation interval of 1 day had a sodium increase of 1847% compared to control. Based on the results of this study, it is recommended not to irrigate foxtail millet farm by contaminated water with laundry detergent higher than 1 g L-1.
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Affiliation(s)
- Hassan Heidari
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Razi University, Kermanshah, Iran.
| | - Maliheh Yosefi
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Razi University, Kermanshah, Iran
| | - Shahryar Sasani
- Horticultural Crops Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran
| | - Iraj Nosratti
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Razi University, Kermanshah, Iran
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