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.

Department(s)

Civil, Architectural and Environmental Engineering

Second Department

Chemistry

Comments

This research was funded by U.S. Department of Agriculture (Award no. 2008-38814-04727) to Missouri University of Science & Technology through Lincoln University of Missouri.

Keywords and Phrases

Arsenic; Grain accumulation; Iron oxide; Rice cultivar; Soil

International Standard Serial Number (ISSN)

0147-6513

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2015 Academic Press, All rights reserved.

Publication Date

01 Aug 2015

PubMed ID

25910688

Link to Full Text

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