For example, a number of patented washing solutions targeting As removal from soils in Korea involve HCl or H3PO4– 1 M hydrochloric acid (HCl) (Choi et al., 2007), 0.5 M phosphoric acid (H3PO4)(Cheong and Kang, 2012), and 2% sodium (Na)
dithionite in 0.01 M HCl (Kim et al., 2012).
For example, a number of patented washing solutions targeting As removal from soils in Korea involve HCl or H3PO4– 1 M hydrochloric acid (HCl) (Choi et al., 2007), 0.5 M phosphoric acid (H3PO4)(Cheong and Kang, 2012), and 2% sodium (Na)dithionite in 0.01 M HCl (Kim et al., 2012).
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