title: Reducing arsenic accumulation in rice grain through iron oxide amendment.
abstract: Effects of soil-arsenic (As), phosphorus and iron oxide on As accumulation in rice grain were investigated. Cultivars that have significantly different sensitivity to As, straighthead-resistant Zhe 733 and straighthead-susceptible Cocodrie, were used to represent different cultivar varieties. The grain accumulation of other elements of concern, selenium (Se), molybdenum (Mo), and cadmium (Cd) was also monitored. Results demonstrated that high soil-As not only resulted in high grain-As, but could also result in high grain-Se, and Zhe 733 had significantly less grain-As than Cocodrie did. However, soil-As did not impact grain-Mo and Cd. Among all elements monitored, iron oxide amendment significantly reduced grain-As for both cultivars, while the phosphate application only reduced grain-Se for Zhe 733. Results also indicated that cultivar type significantly impacted grain accumulation of all monitored trace elements. Therefore, applying iron oxide to As-contaminated land, in addition to choosing appropriate rice cultivar, can effectively reduce the grain accumulation of As.
authors.affiliation: Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, United States.
authors.forename: Eric M
authors.initials: EM
authors.lastname: Farrow
authors.affiliation: Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, United States. Electronic address: wangjia@mst.edu.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, United States.
authors.forename: Joel G
authors.initials: JG
authors.lastname: Burken
authors.affiliation: Department of Chemistry, Missouri University of Science and Technology, Rolla, MO, United States.
authors.forename: Honglan
authors.initials: H
authors.lastname: Shi
authors.affiliation: Dale Bumpers National Rice Research Center, Agricultural Research Service, U.S. Department of Agriculture, Stuttgart, AR, United States.
authors.forename: Wengui
authors.initials: W
authors.lastname: Yan
authors.affiliation: Department of Agriculture and Environmental Sciences, Lincoln University of Missouri, Jefferson City, MO, United States.
authors.forename: John
authors.initials: J
authors.lastname: Yang
authors.affiliation: Department of Agriculture and Environmental Sciences, Lincoln University of Missouri, Jefferson City, MO, United States.
authors.forename: Bin
authors.initials: B
authors.lastname: Hua
authors.affiliation: Department of Civil and Environmental Engineering, University of Missouri, Columbia, MO, United States.
authors.forename: Baolin
authors.initials: B
authors.lastname: Deng
mesh_terms: D001151:Arsenic / Q000378:metabolism*; D005290:Ferric Compounds / Q000008:administration & dosage / Q000378:metabolism*; D005308:Fertilizers / Q000032:analysis*; D008670:Metals / Q000378:metabolism; D012275:Oryza / Q000187:drug effects / Q000378:metabolism*; D010710:Phosphates / Q000008:administration & dosage / Q000378:metabolism*; D012639:Seeds / Q000187:drug effects / Q000378:metabolism; D012643:Selenium / Q000378:metabolism
chemical_list: D005290:Ferric Compounds; D005308:Fertilizers; D008670:Metals; D010710:Phosphates; C000499:ferric oxide; D012643:Selenium; D001151:Arsenic
keywords: Arsenic; Grain accumulation; Iron oxide; Rice cultivar; Soil