2. A new calculating model was derived from the relation of absolute hardness to the radii of
polyvalent ions.
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从绝对硬度与离子半径的关系导出一个高价离子电子亲合能的计算模型。
3. Major treatment methods for arsenic include sulfide precipitation, or complexation with
polyvalent heavy metals.
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砷的主要处理方法有硫化物沉淀法,或与多价重金属络合。