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Occurrence of arsenic in brown rice and its relationship to soil properties from Hainan Island, China |
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| Authors: | Fu Yangrong Chen Mulong Bi Xiangyang He Yusheng Ren Limin Xiang Wu Qiao Shengying Yan Sen Li Zhonggen Ma Zhendong |
| Affiliation: | a Faculty of Earth Science, China University of Geosciences, Wuhan 430074, China b Hainan Institute of Geological Survey, Haikou 570206, China c State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China d State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China |
| Abstract: | The acquaintance of arsenic concentrations in rice grain is vital in risk assessment. In this study, we determined the concentration of arsenic in 282 brown rice grains sampled from Hainan Island, China, and discussed its possible relationships to the considered soil properties. Arsenic concentrations in the rice grain from Hainan Island varied from 5 to 309 μg/kg, with a mean (92 μg/kg) lower than most published data from other countries/regions and the maximum contaminant level (MCL) for Asi in rice. The result of correlation analysis between grain and soil properties showed that grain As concentrations correlated significantly to soil arsenic speciation, organic matter and soil P contents and could be best predicted by humic acid bound and Fe-Mn oxides bound As fractions. Grain arsenic rises steeply at soil As concentrations lower than 3.6 mg/kg and gently at higher concentrations. |
| Keywords: | Arsenic Brown rice Paddy soil Sequential extraction procedure |
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