TY - GEN
T1 - Dissolved ferrous iron concentration optimal for simultaneous reduction of arsenic and cadmium concentrations in rice grain
AU - Honma, T.
AU - Tsuchida, T.
AU - Ohba, H.
AU - Makino, T.
AU - Nakamura, K.
AU - Katou, H.
N1 - Funding Information:
This work was supported by a grant from the Ministry of Agriculture, Forestry, and Fisheries of the Japanese Government (Research project for improving food safety and animal health As-240).
Publisher Copyright:
© 2016 Taylor & Francis Group, London.
PY - 2016
Y1 - 2016
N2 - Arsenic (As) and cadmium (Cd) in rice grain pose threats to human health. Their concentrations in rice grain are sensitive to water managements such as flooding and drainage, and resultant changes in the soil redox potential. However, there has been a paucity of reports on the soil redox conditions under which uptake of As and Cd by rice and their concentrations in grain may be simultaneously suppressed. We carried out field experiments to find the optimal water management and soil conditions, in terms of dissolved ferrous iron (Fe(II)) concentration, for simultaneous reduction of As and Cd in the soil solution and rice grain. Dissolved As and Cd concentrations during pre-heading 3 weeks and post-heading 3 weeks, which exerted strong influence on the As and Cd concentrations in grain, showed distinct relationships with the dissolved Fe(II) concentration. In a given paddy field, the dissolved Fe(II) serves as an indicator of the soil redox condition, and the concentration within the range of 20–30 mg/L was found to be optimum for simultaneous reduction of dissolved As and Cd concentrations in the paddy field tested.
AB - Arsenic (As) and cadmium (Cd) in rice grain pose threats to human health. Their concentrations in rice grain are sensitive to water managements such as flooding and drainage, and resultant changes in the soil redox potential. However, there has been a paucity of reports on the soil redox conditions under which uptake of As and Cd by rice and their concentrations in grain may be simultaneously suppressed. We carried out field experiments to find the optimal water management and soil conditions, in terms of dissolved ferrous iron (Fe(II)) concentration, for simultaneous reduction of As and Cd in the soil solution and rice grain. Dissolved As and Cd concentrations during pre-heading 3 weeks and post-heading 3 weeks, which exerted strong influence on the As and Cd concentrations in grain, showed distinct relationships with the dissolved Fe(II) concentration. In a given paddy field, the dissolved Fe(II) serves as an indicator of the soil redox condition, and the concentration within the range of 20–30 mg/L was found to be optimum for simultaneous reduction of dissolved As and Cd concentrations in the paddy field tested.
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U2 - 10.1201/b20466-139
DO - 10.1201/b20466-139
M3 - Conference contribution
AN - SCOPUS:85016972041
SN - 9781138029415
T3 - Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016
SP - 287
EP - 288
BT - Arsenic Research and Global Sustainability - Proceedings of the 6th International Congress on Arsenic in the Environment, AS 2016
A2 - Bhattacharya, Prosun
A2 - Jacks, Gunnar
A2 - Bundschuh, Jochen
A2 - Bhattacharya, Prosun
A2 - Vahter, Marie
A2 - Jarsjo, Jerker
A2 - Jarsjo, Jerker
A2 - Kumpiene, Jurate
A2 - Ahmad, Arslan
A2 - Sparrenbom, Charlotte
A2 - Donselaar, Marinus Eric
A2 - Bundschuh, Jochen
A2 - Naidu, Ravi
A2 - Naidu, Ravi
PB - CRC Press/Balkema
T2 - 6th International Congress on Arsenic in the Environment, AS 2016
Y2 - 19 June 2016 through 23 June 2016
ER -
