Co-Application of Silicate and Low-Arsenic-Accumulating Rice Cultivars Efficiently Reduces Human Exposure to Arsenic-A Case Study from West Bengal, India

被引:1
作者
Roy, Arkaprava [1 ]
Datta, Siba Prasad [1 ]
Barman, Mandira [1 ]
Golui, Debasis [1 ,2 ]
Bhattacharyya, Somnath [3 ]
Meena, Mahesh Chand [1 ]
Chinnusamy, Viswanathan [4 ]
Pushkar, Suchitra [4 ]
Pandey, Punyavrat S. [5 ]
Rahman, Mohammad Mahmudur [6 ,7 ]
机构
[1] ICAR Indian Agr Res Inst, Div Soil Sci & Agr Chem, New Delhi 110012, India
[2] North Dakota State Univ, Dept Civil Construct & Environm Engn, Fargo, ND 58102 USA
[3] Bidhan Chandra Krishi Viswavidyalaya, Nadia 741252, W Bengal, India
[4] ICAR Indian Agr Res Inst, Div Plant Physiol, New Delhi 110012, India
[5] Indian Council Agr Res, Educ Div, New Delhi 110012, India
[6] Univ Newcastle, Coll Engn Sci & Environm, Global Ctr Environm Remediat GCER, Callaghan, NSW 2308, Australia
[7] Daffodil Int Univ, Fac Sci & Informat Technol, Dept Gen Educ Dev, Dhaka 1207, Bangladesh
关键词
arsenic; hazard quotient; rice cultivar; root-secreted organic acids; silicate; ORYZA-SATIVA L; ORGANIC-MATTER; COOKED RICE; SOIL; PLANTS; WATER; GRAIN; BIOACCUMULATION; IRRIGATION; METALS;
D O I
10.3390/toxics11010064
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We investigated the effect of practically realizable doses of silicate on arsenic (As) uptake by differential-As-accumulating rice cultivars grown on geogenically As-polluted soil. The possible health risk from the dietary ingestion of As through rice was also assessed. In addition, a solution culture experiment was conducted to examine the role of root-secreted weak acids in differential As acquisition by rice cultivars. When grown without silicate, Badshabhog accumulated a much smaller amount of As in grain (0.11 mg kg(-1)) when compared to the other three varieties. Satabdi, IR-36, and Khitish accumulated As in grain beyond the permissible limit (0.2 mg kg(-1)) for human consumption. The application of silicate effectively reduced the As content in the grain, husk, and straw of all of the cultivars. The grain As content fell to 17.2 and 27.6% with the addition of sodium metasilicate at the rates of 250 and 500 mg kg(-1), respectively. In the case of Khitish, the grain As content was brought down within permissible limits by the applied silicate (500 mg kg(-1)). The integrated use of low-As-accumulating cultivars and silicate has great potential to reduce the public health risks associated with As. A positive correlation between root-secreted total weak acid and grain As content could explain the different rice cultivars' differential As acquisition capacity.
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页数:15
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