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Parada J, Rubilar O, Diez MC, Cea M, Sant'Ana da Silva A, Rodríguez-Rodríguez CE, Tortella GR. Combined pollution of copper nanoparticles and atrazine in soil: Effects on dissipation of the pesticide and on microbiological community profiles. J Hazard Mater 2019; 361:228-236. [PMID: 30196035 DOI: 10.1016/j.jhazmat.2018.08.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 08/02/2018] [Accepted: 08/11/2018] [Indexed: 05/23/2023]
Abstract
Copper nanoparticles (NCu) have been proposed as an antimicrobial agent in agriculture. Therefore, NCu may interact with numerous pollutants including pesticides. Little is known about the combined effects of NCu and pesticides in soil. This study aimed at assessing the impact of NCu combined with the herbicide atrazine (ATZ) on soil. We focused on assessing the adsorption and dissipation of ATZ in the presence of NCu and the changes in microbial community profiles. First, ATZ adsorption isotherms (described using the Freundlich equation) were evaluated. After that, soil samples were spiked with NCu (40-60 nm) at 0.05 and 0.15% w/w and ATZ (3 mg a.i kg-1) and incubated for 30 days. The results showed that ATZ adsorption is favored by the presence of NCu. On the other hand, NCu at 0.15% w/w caused a significant decrease in ATZ dissipation, increasing its half-life from 6 to 37 days. Microbial community profiles (bacteria, fungi and nitrifying bacteria) remained relatively stable throughout the evaluated period. Therefore, our findings suggest that NCu can increase the persistence of ATZ in soil, which may be mostly associated to physical-chemical interaction with soil particles more than a microbial impact.
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Affiliation(s)
- J Parada
- Doctoral Program in Sciences of Natural Resources, Universidad de La Frontera, Temuco, Chile
| | - O Rubilar
- Departamento de Ingeniería Química, Universidad de La Frontera, Temuco, Chile; Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Temuco, Chile; Laboratorio de Nanobiotecnología Ambiental, Universidad de La Frontera, Temuco, Chile
| | - M C Diez
- Departamento de Ingeniería Química, Universidad de La Frontera, Temuco, Chile; Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Temuco, Chile
| | - M Cea
- Departamento de Ingeniería Química, Universidad de La Frontera, Temuco, Chile
| | - A Sant'Ana da Silva
- National Institute of Technology, Ministry of Science, Technology, Innovation and Communication, 20081-312, RJ, Brazil; Federal University of Rio de Janeiro, Department of Biochemistry, 21941-909, RJ, Brazil
| | - C E Rodríguez-Rodríguez
- Centro de Investigación en Contaminación Ambiental (CICA), Universidad de Costa Rica, 2060 San José, Costa Rica
| | - G R Tortella
- Departamento de Ingeniería Química, Universidad de La Frontera, Temuco, Chile; Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Temuco, Chile; Laboratorio de Nanobiotecnología Ambiental, Universidad de La Frontera, Temuco, Chile.
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