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UV photochemical hydride generation using ZnO nanoparticles for arsenic speciation in waters, sediments, and soils samples.
Environ Monit Assess. 2020 May 06; 192(6):331.EM

Abstract

The environmental disasters that occurred due to the leakage of mining waste in Mariana-MG (2015) and Brumadinho-MG (2019), located in Brazil, attracted the attention of the scientific community. This designated efforts to investigate the environmental consequences of toxic waste in the affected ecosystem. Therefore, a simple, easily executed and accessible method was presented for arsenic speciation [As(III), As(V), and DMA]. Using an atomic absorption spectrometer coupled to the hydride generation system, the heterogeneous photocatalysis was applied in the reduction of As(V) and DMA to As(III). After the optimization, a calibration curve was constructed, with LODs equivalent to 3.20 μg L-1 As(III), 3.86 μg L-1 As(V), and 6.68 μg L-1 DMA. When applying the method for quantification in environmental samples, a concentration of up to 103.1 ± 9.4 μg L-1 As(V) was determined for surface water samples. The soil samples, 84.1 ± 3.6 μg L-1 As(III) and 112.4 ± 9.9 μg L-1 As(V) were quantified, proving the contamination of the ecosystems impacted by the environmental disasters. We proceeded the study through an addition/recovery method with samples of water, soil, and sediments (collected from impacted environments). Recovery values were equivalent to 99.0% for As(III), 93.8% for As(V), and 99.2% for DMA. Graphical abstract Photocatalytic reduction mechanism of As(V) and DMA to As(III) by heterogeneous photocatalysis.

Authors+Show Affiliations

Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil.Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil. aijomoquim@gmail.com. Chemistry Department, Universidade Federal de São Carlos, São Carlos, SP, Brazil. aijomoquim@gmail.com.Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil.Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil.Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32377885

Citation

Pinheiro, Bianca Santos, et al. "UV Photochemical Hydride Generation Using ZnO Nanoparticles for Arsenic Speciation in Waters, Sediments, and Soils Samples." Environmental Monitoring and Assessment, vol. 192, no. 6, 2020, p. 331.
Pinheiro BS, Moreira AJ, Gimenes LLS, et al. UV photochemical hydride generation using ZnO nanoparticles for arsenic speciation in waters, sediments, and soils samples. Environ Monit Assess. 2020;192(6):331.
Pinheiro, B. S., Moreira, A. J., Gimenes, L. L. S., Freschi, C. D., & Freschi, G. P. G. (2020). UV photochemical hydride generation using ZnO nanoparticles for arsenic speciation in waters, sediments, and soils samples. Environmental Monitoring and Assessment, 192(6), 331. https://doi.org/10.1007/s10661-020-08316-z
Pinheiro BS, et al. UV Photochemical Hydride Generation Using ZnO Nanoparticles for Arsenic Speciation in Waters, Sediments, and Soils Samples. Environ Monit Assess. 2020 May 6;192(6):331. PubMed PMID: 32377885.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - UV photochemical hydride generation using ZnO nanoparticles for arsenic speciation in waters, sediments, and soils samples. AU - Pinheiro,Bianca Santos, AU - Moreira,Ailton José, AU - Gimenes,Luana Lorca Sartori, AU - Freschi,Carolina Dakuzaku, AU - Freschi,Gian Paulo Giovanni, Y1 - 2020/05/06/ PY - 2020/02/08/received PY - 2020/04/21/accepted PY - 2020/5/8/entrez PY - 2020/5/8/pubmed PY - 2020/6/5/medline KW - Analytical accessibility KW - Arsenic KW - Environment pollution KW - Photocatalysis KW - Speciation SP - 331 EP - 331 JF - Environmental monitoring and assessment JO - Environ Monit Assess VL - 192 IS - 6 N2 - The environmental disasters that occurred due to the leakage of mining waste in Mariana-MG (2015) and Brumadinho-MG (2019), located in Brazil, attracted the attention of the scientific community. This designated efforts to investigate the environmental consequences of toxic waste in the affected ecosystem. Therefore, a simple, easily executed and accessible method was presented for arsenic speciation [As(III), As(V), and DMA]. Using an atomic absorption spectrometer coupled to the hydride generation system, the heterogeneous photocatalysis was applied in the reduction of As(V) and DMA to As(III). After the optimization, a calibration curve was constructed, with LODs equivalent to 3.20 μg L-1 As(III), 3.86 μg L-1 As(V), and 6.68 μg L-1 DMA. When applying the method for quantification in environmental samples, a concentration of up to 103.1 ± 9.4 μg L-1 As(V) was determined for surface water samples. The soil samples, 84.1 ± 3.6 μg L-1 As(III) and 112.4 ± 9.9 μg L-1 As(V) were quantified, proving the contamination of the ecosystems impacted by the environmental disasters. We proceeded the study through an addition/recovery method with samples of water, soil, and sediments (collected from impacted environments). Recovery values were equivalent to 99.0% for As(III), 93.8% for As(V), and 99.2% for DMA. Graphical abstract Photocatalytic reduction mechanism of As(V) and DMA to As(III) by heterogeneous photocatalysis. SN - 1573-2959 UR - https://www.unboundmedicine.com/medline/citation/32377885/UV_photochemical_hydride_generation_using_ZnO_nanoparticles_for_arsenic_speciation_in_waters,_sediments,_and_soils_samples L2 - https://doi.org/10.1007/s10661-020-08316-z DB - PRIME DP - Unbound Medicine ER -