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Zhang Z, Li J, Li Y, Wang D, Zhang J, Zhao L. Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 228:112957. [PMID: 34775342 DOI: 10.1016/j.ecoenv.2021.112957] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 10/27/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
Bioretention system is one of the most used green stormwater infrastructures (GSI), and its media is a key factor in reducing runoff water volume and purifying water quality. Many studies have investigated media improvement to enhance the pollutant removal capacity. However, the long-term cumulative effect and microbial effect of pollutants in the modified-media bioretention system is less known. This study investigated the cumulative effect of pollutants and their influence on microbial characteristics in conventional and modified media bioretention system. The addition of modifiers increased the background content of pollutants in the media, and the accumulation of pollutants in planting soil (PS) and bioretention soil mixing + water treatment residuals (BSM+WTR) was relatively higher after the simulated rainfall experiment. The accumulation of pollutants led to a decrease in dehydrogenase activity, and an increase in urease and invertase activities. Ten dominant bacterial species at the phylum level were found in all bioretention systems. The relative abundances of the bacteria with good viability under low nutritional conditions decreased, while the species which could live in the pollutant-rich environment increased. The accumulation of pollutants in the bioretention system led to the extinction of some functional microorganisms. The better the effects of modified media on pollutant removal showed, the more obvious effect on the media micro-ecosystem was. To ensure the long-term efficient and stable operation of the modified-media bioretention system, we recommend balancing the pollutant removal efficiency and cumulative effect in modified-media bioretention systems.
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Affiliation(s)
- Zhaoxin Zhang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China; Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an 710075, China
| | - Jiake Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
| | - Yajiao Li
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Dongqi Wang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Jingyu Zhang
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Lingzhi Zhao
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
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Prudnikova S, Streltsova N, Volova T. The effect of the pesticide delivery method on the microbial community of field soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:8681-8697. [PMID: 33064277 DOI: 10.1007/s11356-020-11228-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 10/11/2020] [Indexed: 05/26/2023]
Abstract
The study deals with the effects of herbicides (metribuzin, tribenuron-methyl, fenoxaprop-P-ethyl) and fungicides (tebuconazole, epoxiconazole, azoxystrobin) applied to soil as free pesticides or as slow release formulations embedded in a biodegradable composite matrix on the structure of the soil microbial community. The matrix consisted of a natural biopolymer poly-3-hydroxybutyrate [P(3HB)] and a filler-one of the natural materials (peat, clay, and wood flour). The soil microbial community was characterized, including the major eco-trophic groups of bacteria, dominant taxa of bacteria and fungi, and primary P(3HB)-degrading microorganisms, such as Pseudomonas, Bacillus, Pseudarthrobacter, Streptomyces, Penicillium, and Talaromyces. The addition of free pesticides adversely affected the abundance of soil microorganisms; the decrease varied from 1.4 to 56.0 times for different types of pesticides. The slow release pesticide formulations, in contrast to the free pesticides, exerted a much weaker effect on soil microorganisms, no significant inhibition in the abundance of saprotrophic bacteria was observed, partly due to the positive effects of the composite matrix (polymer/natural material), which was a supplementary substrate for microorganisms. The slow release fungicide formulations, like the free fungicides, reduced the total abundance of fungi and inhibited the development of the phytopathogens Fusarium and Alternaria. Thus, slow release formulations of pesticides preserve the bioremediation potential of soil microorganisms, which are the main factor of removing xenobiotics from the biosphere.
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Affiliation(s)
| | | | - Tatiana Volova
- Siberian Federal University, 79 Svobodny pr, Krasnoyarsk, 660041, Russia
- Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk, 660036, Russia
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3
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Dias LDA, Gebler L, Niemeyer JC, Itako AT. Destination of pesticide residues on biobeds: State of the art and future perspectives in Latin America. CHEMOSPHERE 2020; 248:126038. [PMID: 32041065 DOI: 10.1016/j.chemosphere.2020.126038] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 01/23/2020] [Accepted: 01/25/2020] [Indexed: 06/10/2023]
Abstract
Land-use intensification with a high demand for pesticides is a consequence of human population increase. Feasible alternatives for correct concentrated residues discharge are necessary to avoid soil and water resources contamination. Biobeds are in situ bioreactors for treating pesticide residues, used by several European and American countries due to its low cost and simple construction, whose efficiency has been scientifically proved for over 20 years. This review presents the state of the art of biobeds in Latin America (LA), identifying advances and future research needs. Factors affecting the efficiency of biobeds are discussed, like ideal temperature, moisture, and microbial communities, followed by methods for evaluating the bioreactor's efficiency. It was necessary to adapt this technology to the climatic and economic conditions of Latin-American countries, due to its European origins. Guatemala is the LA country that uses biobeds as official technology. Brazil, Argentina, Costa Rica and Chile are examples of countries that are actively investigating new substrates and pursuing legal aspects for the establishment of the biobeds. Robust scientific evidences may enable farmers start using this technology, which is an environmentally safe system to protect water resources.
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Affiliation(s)
- Leticia de A Dias
- Programa de Pós-Graduação em Ecossistemas Agrícolas e Naturais (PPGEAN), Universidade Federal de Santa Catarina (UFSC), Campus de Curitibanos, Curitibanos, Santa Catarina, 89520-000, Brasil.
| | - Luciano Gebler
- Estação Experimental de Fruticultura de Clima Temperado (EFCT), EMBRAPA Uva e Vinho, Vacaria, Rio Grande do Sul, Brasil
| | - Júlia C Niemeyer
- Programa de Pós-Graduação em Ecossistemas Agrícolas e Naturais (PPGEAN), Universidade Federal de Santa Catarina (UFSC), Campus de Curitibanos, Curitibanos, Santa Catarina, 89520-000, Brasil
| | - Adriana T Itako
- Programa de Pós-Graduação em Ecossistemas Agrícolas e Naturais (PPGEAN), Universidade Federal de Santa Catarina (UFSC), Campus de Curitibanos, Curitibanos, Santa Catarina, 89520-000, Brasil
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4
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Lin Z, Zhang W, Pang S, Huang Y, Mishra S, Bhatt P, Chen S. Current Approaches to and Future Perspectives on Methomyl Degradation in Contaminated Soil/Water Environments. Molecules 2020; 25:E738. [PMID: 32046287 PMCID: PMC7036768 DOI: 10.3390/molecules25030738] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 02/03/2020] [Accepted: 02/07/2020] [Indexed: 01/10/2023] Open
Abstract
Methomyl is a broad-spectrum oxime carbamate commonly used to control arthropods, nematodes, flies, and crop pests. However, extensive use of this pesticide in agricultural practices has led to environmental toxicity and human health issues. Oxidation, incineration, adsorption, and microbial degradation methods have been developed to remove insecticidal residues from soil/water environments. Compared with physicochemical methods, biodegradation is considered to be a cost-effective and ecofriendly approach to the removal of pesticide residues. Therefore, micro-organisms have become a key component of the degradation and detoxification of methomyl through catabolic pathways and genetic determinants. Several species of methomyl-degrading bacteria have been isolated and characterized, including Paracoccus, Pseudomonas, Aminobacter, Flavobacterium, Alcaligenes, Bacillus, Serratia, Novosphingobium, and Trametes. The degradation pathways of methomyl and the fate of several metabolites have been investigated. Further in-depth studies based on molecular biology and genetics are needed to elaborate their role in the evolution of novel catabolic pathways and the microbial degradation of methomyl. In this review, we highlight the mechanism of microbial degradation of methomyl along with metabolic pathways and genes/enzymes of different genera.
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Affiliation(s)
- 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 510642, China; (Z.L.); (W.Z.); (S.P.); (Y.H.); (S.M.); (P.B.)
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, China
| | - 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 510642, China; (Z.L.); (W.Z.); (S.P.); (Y.H.); (S.M.); (P.B.)
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, 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 510642, China; (Z.L.); (W.Z.); (S.P.); (Y.H.); (S.M.); (P.B.)
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Yaohua Huang
- 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 510642, China; (Z.L.); (W.Z.); (S.P.); (Y.H.); (S.M.); (P.B.)
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Sandhya Mishra
- 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 510642, China; (Z.L.); (W.Z.); (S.P.); (Y.H.); (S.M.); (P.B.)
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, 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 510642, China; (Z.L.); (W.Z.); (S.P.); (Y.H.); (S.M.); (P.B.)
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, 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 510642, China; (Z.L.); (W.Z.); (S.P.); (Y.H.); (S.M.); (P.B.)
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangzhou 510642, China
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Rodríguez-Castillo G, Molina-Rodríguez M, Cambronero-Heinrichs JC, Quirós-Fournier JP, Lizano-Fallas V, Jiménez-Rojas C, Masís-Mora M, Castro-Gutiérrez V, Mata-Araya I, Rodríguez-Rodríguez CE. Simultaneous removal of neonicotinoid insecticides by a microbial degrading consortium: Detoxification at reactor scale. CHEMOSPHERE 2019; 235:1097-1106. [PMID: 31561300 DOI: 10.1016/j.chemosphere.2019.07.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 06/29/2019] [Accepted: 07/01/2019] [Indexed: 05/24/2023]
Abstract
Neonicotinoid insecticides show high persistence in the environment, and standard biological approaches such as biopurification systems have shown mostly inefficient removal of such compounds. In this work, soil pre-exposed to imidacloprid was used to obtain presumptive imidacloprid-degrading consortia. Cometabolic enrichment yielded a microbial consortium composed of eight bacterial and one yeast strains, capable of degrading not only this compound, but also thiamethoxam and acetamiprid, as demonstrated in cross-degradation assays. The biological removal process was scaled-up to batch stirred tank bioreactors (STBR); this configuration was able to simultaneously remove mixtures of imidacloprid + thiamethoxam or imidacloprid + thiamethoxam + acetamiprid, reaching elimination of 95.8% and 94.4% of total neonicotinoids, respectively. Removal rates in the bioreactors followed the pattern imidacloprid > acetamiprid > thiamethoxam, including >99% elimination of imidacloprid in 6 d and 17 d (binary and ternary mixtures, respectively). A comprehensive evaluation of the detoxification in the STBR was performed using different biomarkers: seed germination (Lactuca sativa), bioluminescence inhibition (Vibrio fischeri), and acute oral tests in honeybees. Overall, ecotoxicological tests revealed partial detoxification of the matrix, with clearer detoxification patterns in the binary mixture. This biological approach represents a promising option for the removal of neonicotinoids from agricultural wastewater; however, optimization of the process should be performed before application in farms.
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Affiliation(s)
- Gabriel Rodríguez-Castillo
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060, San José, Costa Rica
| | - Marvin Molina-Rodríguez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060, San José, Costa Rica
| | | | - José Pablo Quirós-Fournier
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, 1174-1200, San José, Costa Rica
| | - Verónica Lizano-Fallas
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060, San José, Costa Rica
| | - César Jiménez-Rojas
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060, San José, Costa Rica
| | - Mario Masís-Mora
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060, San José, Costa Rica
| | - Víctor Castro-Gutiérrez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060, San José, Costa Rica
| | - Iray Mata-Araya
- Centro Nacional de Innovaciones Biotecnológicas (CENIBiot), CeNAT-CONARE, 1174-1200, San José, Costa Rica
| | - Carlos E Rodríguez-Rodríguez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060, San José, Costa Rica.
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6
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Kinetics study of nicosulfuron degradation by a Pseudomonas nitroreducens strain NSA02. Biodegradation 2018; 29:271-283. [DOI: 10.1007/s10532-018-9828-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 03/31/2018] [Indexed: 10/17/2022]
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7
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Castro-Gutiérrez V, Masís-Mora M, Carazo-Rojas E, Mora-López M, Rodríguez-Rodríguez CE. Impact of oxytetracycline and bacterial bioaugmentation on the efficiency and microbial community structure of a pesticide-degrading biomixture. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:11787-11799. [PMID: 29442313 DOI: 10.1007/s11356-018-1436-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/30/2018] [Indexed: 06/08/2023]
Abstract
An experimental study evaluating the effect of bioaugmentation and antibiotic (oxytetracycline) application on pesticide degradation and microbial community structure of a biomixture used in a biopurification system (BPR) was conducted. The bioaugmentation employed a carbofuran-degrading bacterial consortium. The non-bioaugmented biomixture showed excellent performance for removal of atrazine (t1/2: 9.9 days), carbendazim (t1/2: 3.0 days), carbofuran (t1/2: 2.8 days), and metalaxyl (t1/2: 2.7 days). Neither the addition of oxytetracycline nor bioaugmentation affected the efficiency of pesticide removal or microbial community (bacterial and fungal) structure, as determined by DGGE analysis. Instead, biomixture aging was mainly responsible for microbial population shifts. Even though the bioaugmentation did not enhance the biomixtures' performance, this matrix showed a high capability to sustain initial stresses related to antibiotic addition; therefore, simultaneous elimination of this particular mixture of pesticides together with oxytetracycline residues is not discouraged.
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Affiliation(s)
- Víctor Castro-Gutiérrez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, San José, 2060, Costa Rica
- Centro de Investigación en Biología Celular y Molecular (CIBCM), Universidad de Costa Rica, San José, 2060, Costa Rica
| | - Mario Masís-Mora
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, San José, 2060, Costa Rica
| | - Elizabeth Carazo-Rojas
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, San José, 2060, Costa Rica
| | - Marielos Mora-López
- Centro de Investigación en Biología Celular y Molecular (CIBCM), Universidad de Costa Rica, San José, 2060, Costa Rica
| | - Carlos E Rodríguez-Rodríguez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, San José, 2060, Costa Rica.
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8
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Jiménez-Gamboa D, Castro-Gutiérrez V, Fernández-Fernández E, Briceño-Guevara S, Masís-Mora M, Chin-Pampillo JS, Mora-López M, Carazo-Rojas E, Rodríguez-Rodríguez CE. Expanding the application scope of on-farm biopurification systems: Effect and removal of oxytetracycline in a biomixture. JOURNAL OF HAZARDOUS MATERIALS 2018; 342:553-560. [PMID: 28886567 DOI: 10.1016/j.jhazmat.2017.08.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/18/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
Antibiotic-containing wastewaters produced in agricultural activities may depress the pesticide-degrading capacity of biomixtures contained in biopurification systems. This work aimed to assay the effect of oxytetracycline (OTC) on the removal of carbofuran (CFN) in an optimized biomixture, and to determine the capacity of the system to dissipate OTC. During co-application of CFN+OTC, CFN removal and its accelerated degradation were not negatively affected. Similarly, different doses of OTC (10-500mgkg-1) did not significantly affect CFN mineralization, and the process even exhibited a hormetic-like effect. Moreover, the biomixture was able to remove OTC with a half-life of 34.0 d. DGGE-cluster analyses indicated that fungal and bacterial communities remained relatively stable during OTC application and CFN+OTC co-application, with similarities of over 70% (bacteria) and 80% (fungi). Overall, these findings support the potential use of this matrix to discard OTC-containing wastewater in this system originally intended for CFN removal.
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Affiliation(s)
- David Jiménez-Gamboa
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica
| | - Víctor Castro-Gutiérrez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica; Centro de Investigación en Biología Celular y Molecular (CIBCM), UCR, 2060 San José, Costa Rica
| | - Ericka Fernández-Fernández
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica
| | - Susana Briceño-Guevara
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica
| | - Mario Masís-Mora
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica
| | - Juan Salvador Chin-Pampillo
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica
| | - Marielos Mora-López
- Centro de Investigación en Biología Celular y Molecular (CIBCM), UCR, 2060 San José, Costa Rica
| | - Elizabeth Carazo-Rojas
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica
| | - Carlos E Rodríguez-Rodríguez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica (UCR), 2060 San José, Costa Rica.
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Diez MC, Elgueta S, Rubilar O, Tortella GR, Schalchli H, Bornhardt C, Gallardo F. Pesticide dissipation and microbial community changes in a biopurification system: influence of the rhizosphere. Biodegradation 2017; 28:395-412. [PMID: 28780760 DOI: 10.1007/s10532-017-9804-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 07/20/2017] [Indexed: 11/28/2022]
Abstract
The dissipation of atrazine, chlorpyrifos and iprodione in a biopurification system and changes in the microbial and some biological parameters influenced by the rhizosphere of Lolium perenne were studied in a column system packed with an organic biomixture. Three column depths were analyzed for residual pesticides, peroxidase, fluorescein diacetate activity and microbial communities. Fungal colonization was analyzed by confocal laser scanning microscopy to assess the extent of its proliferation in wheat straw. The L. perenne rhizosphere enhanced pesticide dissipation and negligible pesticide residues were detected at 20-30 cm column depth. Atrazine, chlorpyrifos and iprodione removal was 82, 89 and 74% respectively in the first 10 cm depth for columns with vegetal cover. The presence of L. perenne in contaminated columns stimulated peroxidase activity in all three column depth sections. Fluorescein diacetate activity decreased over time in all column sections with the highest values in biomixtures with vegetal cover. Microbial communities, analyzed by PCR-DGGE, were not affected by the pesticide mixture application, presenting high values of similarity (>65%) with and without vegetal cover. Microbial abundance of Actinobacteria varied according to treatment and no clear link was observed. However, bacterial abundance increased over time and was similar with and without vegetal cover. On the other hand, fungal abundance decreased in all sections of columns after 40 days, but an increase was observed in response to pesticide application. Fungal colonization and straw degradation during pesticide dissipation were verified by monitoring the lignin autofluorescence loss.
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Affiliation(s)
- M C Diez
- Chemical Engineering Department, Universidad de La Frontera, Temuco, Chile. .,Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile.
| | - S Elgueta
- Chemical Science and Natural Resource Department, Universidad de La Frontera, Temuco, Chile
| | - O Rubilar
- Chemical Engineering Department, Universidad de La Frontera, Temuco, Chile.,Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - G R Tortella
- Chemical Engineering Department, Universidad de La Frontera, Temuco, Chile.,Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - H Schalchli
- Chemical Engineering Department, Universidad de La Frontera, Temuco, Chile.,Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - C Bornhardt
- Chemical Engineering Department, Universidad de La Frontera, Temuco, Chile.,Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - F Gallardo
- Chemical Science and Natural Resource Department, Universidad de La Frontera, Temuco, Chile.,Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), Universidad de La Frontera, Temuco, Chile
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10
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Dávila-Jiménez MM, Elizalde-González MP, García-Díaz E, González M, Mendoza ME, Robles-Águila MJ. Carbofuran degraded by iron-doped anatase: Weakening the cholinesterase inhibitory activity in the photoproducts mixture. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2017; 52:538-546. [PMID: 28494203 DOI: 10.1080/03601234.2017.1316161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Carbofuran is a toxic carbamate pesticide, and its use has increased in recent years. While marketing information indicates stability in different chemical media, carbofuran exhibits relative photolability. The aim of this research was to decompose carbofuran and to identify the photoproducts achieved when two different doped titania photocatalysts were employed under UV irradiation. The iron-doped TiO2 materials were obtained (a) via a hydrothermal method and (b) by an ultrasound-assisted sol-gel method. The precursors were TiOSO4⋅xH2O and Fe3(NO3)·9H2O. X-ray studies confirmed that the anatase phase of the iron-doped TiO2 resulted from the two preparation methods. The photocatalytic performance of the prepared materials was monitored by LC/ESI-QTOF-MS, enabling the identification of photoproducts: oxo-carbamates, hydroxylated benzofuranes, a carboxamide, and one amine. By using the iron-doped TiO2 materials, 2,2-dimethyl-2,3-dihydrobenzofuran-3,7-diol was the most abundant photoproduct, and N,2,2-trimethyl-2,3-dihydrobenzofuran-7-amine was the only compound that had not been previously reported in the photolysis and photocatalysis of carbofuran. The product 3-hydroxy carbofuran, a cholinesterase inhibitor, was quantified and was found to be transformed into compounds that lack this inhibitive property.
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Affiliation(s)
| | - María P Elizalde-González
- b Chemistry Centre, Institute of Sciences , Autonomous University of Puebla (BUAP) , Puebla , Mexico
| | - Esmeralda García-Díaz
- b Chemistry Centre, Institute of Sciences , Autonomous University of Puebla (BUAP) , Puebla , Mexico
| | - Miguel González
- a Faculty of Chemical Sciences , Autonomous University of Puebla (BUAP) , Puebla , Mexico
| | - M E Mendoza
- c Institute of Physics, Autonomous University of Puebla (BUAP) , Puebla , Mexico
| | - M J Robles-Águila
- b Chemistry Centre, Institute of Sciences , Autonomous University of Puebla (BUAP) , Puebla , Mexico
- c Institute of Physics, Autonomous University of Puebla (BUAP) , Puebla , Mexico
- d Research Center on Semiconductor Devices , Institute of Sciences, Autonomous University of Puebla (BUAP) , Puebla , Mexico
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