ARSENIC SORBENT AND METHOD FOR REMEDIATING ARSENIC-CONTAMINATED MATERIAL

摘要

Provided are an arsenate sorbent which has good arsenate-sorption performance and high sorbate stability, and a remediation method using the same. Monohydrocalcite formed as a precipitate by mixing an aqueous solution, which contains Mg2+ ion and Ca2+ ion at a ratio (Mg/Ca) of 0.3 or more, with a soluble carbonic acid salt or an aqueous carbonic acid solution, characterized in that the molar ratio [Mg/(Ca+Mg)] in the monohydrocalcite is 0.1 or less.