Yamily J. Zavala
Environmental scienceArsenicAgronomyEnvironmental engineeringIrrigation
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Publications 3
#1John M. Duxbury (Cornell University)H-Index: 31
#2Golam M. PanaullahH-Index: 5
Last. Zia U. Ahmed (A&M: Texas A&M University)H-Index: 1
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Arsenic (As) contamination of irrigation water and soils of Bangladesh was found to be highly variable at scales from the command area of a tubewell to nationwide. Spatial pattern in soil As at the command area scale was created as irrigation water was rapidly oxygenated and As adsorbed on precipitated ferric hydroxides. Complex relationships between irrigation water and soil As levels were found in an study of 5 upazilla. At the national scale, soil As was elevated in the Gangetic floodplain in...
5 Citations
High levels of arsenic (As) in rice grain are a potential concern for human health. Variability in total As in rice was evaluated using 204 commercial rice samples purchased mostly in retail stores in upstate New York and supplemented with samples from Canada, France, Venezuela, and other countries. Total As concentration in rice varied from 0.005 to 0.710 mg kg -1 . We combined our data set with literature values to derive a global “normal” range of 0.08-0.20 mg kg -1 for As concentration in ri...
186 CitationsSource
Rice is a potentially important route of human exposure to arsenic, especially in populations with rice-based diets. However, arsenic toxicity varies greatly with species. The initial purpose of the present study was to evaluate arsenic speciation in U.S. rice. Twenty-four samples containing high levels of arsenic and produced in different regions of the U.S were selected from a previous market-basket survey. Arsenite and dimethyl arsinic acid (DMA) were the major species detected. DMA increased...
173 CitationsSource