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Differential impacts of copper oxide nanoparticles and Copper(II) ions on the uptake and accumulation of arsenic in rice (Oryza sativa).
Environ Pollut. 2019 Sep; 252(Pt B):967-973.EP

Abstract

Arsenic (As) in rice grains is a serious food safety concern. Some coexisting engineered nanoparticles (ENPs) were shown to alter the accumulation and speciation of As in rice grains. However, investigation on the effects of copper oxide nanoparticles (CuO NPs), a popular ingredient in pesticides, on the uptake and accumulation of As is rare. We explored the potentially different impact of CuO NPs and corresponding Cu(II) ions on the accumulation of two As species in rice seedlings in a hydroponic system. Rice seedlings were treated with a combinations of 1 mg/L of arsenite (As(III)) or arsenate (As(V)) and 100 mg/L of CuO NPs or Cu(II) for 6 days. Both forms of Cu significantly reduced the accumulation of total As in rice tissues, with Cu(II) exhibiting significantly greater effect than CuO NPs. As speciation in rice roots was markedly affected by both forms of Cu, and the impacts were Cu-form dependent. For example, the co-existence of As(V) with CuO NPs led to a 45% decrease of As(V) in rice roots, while the co-existence of As(V) with Cu(II) caused a 47% increase in As(V) in rice roots. As speciation in rice shoots was less affected by co-present Cu than in rice roots. Co-occurring As(III) or As(V) lowered Cu concentration in rice roots by 40% and 50% in treatments with CuO NPs, but did not affect Cu content in rice roots co-exposed to Cu(II). The study confirmed the reciprocal effect of co-occurring CuO NPs or Cu(II) and As in rice paddies and highlighted the unique "nano-effect" of CuO NPs. The results alsos showed that the initial oxidation state of As plays an important role in the interactions between As and Cu. The results shed light on the current debate on the safe applications of nano-enabled agrichemicals vs. conventional metal salts in agriculture.

Authors+Show Affiliations

Zachry Department of Civil Engineering, Texas A&M University, TAMU 3136, College Station, TX, 77843-3136, USA.Department of Civil and Environmental Engineering, Southern Methodist University, 3101 Dyer Street, Dallas, TX, 75205, USA.Zachry Department of Civil Engineering, Texas A&M University, TAMU 3136, College Station, TX, 77843-3136, USA. Electronic address: xma@civil.tamu.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31252135

Citation

Wang, Xiaoxuan, et al. "Differential Impacts of Copper Oxide Nanoparticles and Copper(II) Ions On the Uptake and Accumulation of Arsenic in Rice (Oryza Sativa)." Environmental Pollution (Barking, Essex : 1987), vol. 252, no. Pt B, 2019, pp. 967-973.
Wang X, Sun W, Ma X. Differential impacts of copper oxide nanoparticles and Copper(II) ions on the uptake and accumulation of arsenic in rice (Oryza sativa). Environ Pollut. 2019;252(Pt B):967-973.
Wang, X., Sun, W., & Ma, X. (2019). Differential impacts of copper oxide nanoparticles and Copper(II) ions on the uptake and accumulation of arsenic in rice (Oryza sativa). Environmental Pollution (Barking, Essex : 1987), 252(Pt B), 967-973. https://doi.org/10.1016/j.envpol.2019.06.052
Wang X, Sun W, Ma X. Differential Impacts of Copper Oxide Nanoparticles and Copper(II) Ions On the Uptake and Accumulation of Arsenic in Rice (Oryza Sativa). Environ Pollut. 2019;252(Pt B):967-973. PubMed PMID: 31252135.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential impacts of copper oxide nanoparticles and Copper(II) ions on the uptake and accumulation of arsenic in rice (Oryza sativa). AU - Wang,Xiaoxuan, AU - Sun,Wenjie, AU - Ma,Xingmao, Y1 - 2019/06/14/ PY - 2019/04/01/received PY - 2019/05/13/revised PY - 2019/06/11/accepted PY - 2019/6/30/pubmed PY - 2019/10/28/medline PY - 2019/6/29/entrez KW - Arsenic KW - Arsenic speciation KW - Copper ions KW - Copper oxide nanoparticles KW - Rice SP - 967 EP - 973 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 252 IS - Pt B N2 - Arsenic (As) in rice grains is a serious food safety concern. Some coexisting engineered nanoparticles (ENPs) were shown to alter the accumulation and speciation of As in rice grains. However, investigation on the effects of copper oxide nanoparticles (CuO NPs), a popular ingredient in pesticides, on the uptake and accumulation of As is rare. We explored the potentially different impact of CuO NPs and corresponding Cu(II) ions on the accumulation of two As species in rice seedlings in a hydroponic system. Rice seedlings were treated with a combinations of 1 mg/L of arsenite (As(III)) or arsenate (As(V)) and 100 mg/L of CuO NPs or Cu(II) for 6 days. Both forms of Cu significantly reduced the accumulation of total As in rice tissues, with Cu(II) exhibiting significantly greater effect than CuO NPs. As speciation in rice roots was markedly affected by both forms of Cu, and the impacts were Cu-form dependent. For example, the co-existence of As(V) with CuO NPs led to a 45% decrease of As(V) in rice roots, while the co-existence of As(V) with Cu(II) caused a 47% increase in As(V) in rice roots. As speciation in rice shoots was less affected by co-present Cu than in rice roots. Co-occurring As(III) or As(V) lowered Cu concentration in rice roots by 40% and 50% in treatments with CuO NPs, but did not affect Cu content in rice roots co-exposed to Cu(II). The study confirmed the reciprocal effect of co-occurring CuO NPs or Cu(II) and As in rice paddies and highlighted the unique "nano-effect" of CuO NPs. The results alsos showed that the initial oxidation state of As plays an important role in the interactions between As and Cu. The results shed light on the current debate on the safe applications of nano-enabled agrichemicals vs. conventional metal salts in agriculture. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/31252135/Differential_impacts_of_copper_oxide_nanoparticles_and_Copper_II__ions_on_the_uptake_and_accumulation_of_arsenic_in_rice__Oryza_sativa__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(19)31700-2 DB - PRIME DP - Unbound Medicine ER -
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