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Effects of manganese oxide-modified biochar composites on arsenic speciation and accumulation in an indica rice (Oryza sativa L.) cultivar.
Chemosphere. 2017 Feb; 168:341-349.C

Abstract

A pot experiment was used to investigate arsenic (As) speciation and accumulation in rice, as well as its concentration in both heavily contaminated and moderately contaminated soils amended with manganese oxide-modified biochar composites (MBC) and biochar alone (BC). In heavily As-contaminated soil, application of BC and MBC improved the weight of above-ground part and rice root, whereas in moderately As-contaminated soil, the application of MBC and low rate BC amendment increased rice root, grain weight and the biomass of the plant. Arsenic reduction in different parts of rice grown in MBC-amended soils was greater than that in plants cultivated in BC-amended soils. Such reduction can be attributed to the oxidation of arsenite, As(III), to arsenate, As(V), by Mn-oxides, which also had a strong adsorptive capacity for As(V). MBC amended to As-contaminated soil had a positive effect on amino acids. The Fe and Mn levels in the iron-manganese plaque that formed on the rice root surface differed among the treatments. MBC addition significantly increased Mn content (p < 0.05); the application of 2.0% MBC increased Mn content 36- and 10-fold compared to the control in heavily and moderately As-contaminated soils, respectively. The results indicate that application of Mn oxide-modified biochar to As-contaminated paddy soil could effectively remediate contaminated soil and reduce As accumulation in edible parts of rice.

Authors+Show Affiliations

Agro-environmental Protection Institute, Ministry of Agriculture, Key Laboratory of Production Environment Quality, Ministry of Agriculture of China, Tianjin 300191, China.The New Zealand Institute for Plant and Food Research Limited, Private Bag 4704, Christchurch 8140, New Zealand.Agro-environmental Protection Institute, Ministry of Agriculture, Key Laboratory of Production Environment Quality, Ministry of Agriculture of China, Tianjin 300191, China.College of Resource and Environment, Hunan Agricultural University, Changsha 410128, China.Agro-environmental Protection Institute, Ministry of Agriculture, Key Laboratory of Production Environment Quality, Ministry of Agriculture of China, Tianjin 300191, China.Agro-environmental Protection Institute, Ministry of Agriculture, Key Laboratory of Production Environment Quality, Ministry of Agriculture of China, Tianjin 300191, China. Electronic address: forestman1218@163.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27810533

Citation

Yu, Zhihong, et al. "Effects of Manganese Oxide-modified Biochar Composites On Arsenic Speciation and Accumulation in an Indica Rice (Oryza Sativa L.) Cultivar." Chemosphere, vol. 168, 2017, pp. 341-349.
Yu Z, Qiu W, Wang F, et al. Effects of manganese oxide-modified biochar composites on arsenic speciation and accumulation in an indica rice (Oryza sativa L.) cultivar. Chemosphere. 2017;168:341-349.
Yu, Z., Qiu, W., Wang, F., Lei, M., Wang, D., & Song, Z. (2017). Effects of manganese oxide-modified biochar composites on arsenic speciation and accumulation in an indica rice (Oryza sativa L.) cultivar. Chemosphere, 168, 341-349. https://doi.org/10.1016/j.chemosphere.2016.10.069
Yu Z, et al. Effects of Manganese Oxide-modified Biochar Composites On Arsenic Speciation and Accumulation in an Indica Rice (Oryza Sativa L.) Cultivar. Chemosphere. 2017;168:341-349. PubMed PMID: 27810533.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of manganese oxide-modified biochar composites on arsenic speciation and accumulation in an indica rice (Oryza sativa L.) cultivar. AU - Yu,Zhihong, AU - Qiu,Weiwen, AU - Wang,Fei, AU - Lei,Ming, AU - Wang,Di, AU - Song,Zhengguo, Y1 - 2016/10/27/ PY - 2016/02/23/received PY - 2016/10/12/revised PY - 2016/10/19/accepted PY - 2016/11/5/pubmed PY - 2017/4/4/medline PY - 2016/11/5/entrez KW - Arsenic KW - Brown rice KW - Manganese oxide-biochar composites KW - Paddy soil SP - 341 EP - 349 JF - Chemosphere JO - Chemosphere VL - 168 N2 - A pot experiment was used to investigate arsenic (As) speciation and accumulation in rice, as well as its concentration in both heavily contaminated and moderately contaminated soils amended with manganese oxide-modified biochar composites (MBC) and biochar alone (BC). In heavily As-contaminated soil, application of BC and MBC improved the weight of above-ground part and rice root, whereas in moderately As-contaminated soil, the application of MBC and low rate BC amendment increased rice root, grain weight and the biomass of the plant. Arsenic reduction in different parts of rice grown in MBC-amended soils was greater than that in plants cultivated in BC-amended soils. Such reduction can be attributed to the oxidation of arsenite, As(III), to arsenate, As(V), by Mn-oxides, which also had a strong adsorptive capacity for As(V). MBC amended to As-contaminated soil had a positive effect on amino acids. The Fe and Mn levels in the iron-manganese plaque that formed on the rice root surface differed among the treatments. MBC addition significantly increased Mn content (p < 0.05); the application of 2.0% MBC increased Mn content 36- and 10-fold compared to the control in heavily and moderately As-contaminated soils, respectively. The results indicate that application of Mn oxide-modified biochar to As-contaminated paddy soil could effectively remediate contaminated soil and reduce As accumulation in edible parts of rice. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/27810533/Effects_of_manganese_oxide_modified_biochar_composites_on_arsenic_speciation_and_accumulation_in_an_indica_rice__Oryza_sativa_L___cultivar_ DB - PRIME DP - Unbound Medicine ER -