硫化亚铁处理含砷废水中砷的形态变化  

THE CHANGE OF ARSENIC FORMS IN THE TREATMENT FOR ARSENIC WASTEWATER BY FERROUS SULFIDE

作　　者：江元汝[1] 黄琼玉 

机构地区：[1]西安建筑科技大学,西安710055

出　　处：《环境化学》1996年第2期118-126,共9页Environmental Chemistry

摘　　要：本文对用硫化亚铁处理含砷废水时、在气相、液相和固相中砷的形态进行了研究结果表明,在气相中无AsH_3,但在As(v)废水的液相中有As(v)和As(Ⅲ)共同存在 在固相中有As(0),FeAsO_4(FeAsO_3),As_2S_3(As_2S_5)和吸附砷.砷的形态变化表明,硫化亚铁处理含砷废水能取得良好的效果,是沉淀、沉淀转化、氧化还原、吸附共沉淀和中和五种反应共同作用的结果.The arsenic forms in gaseous phase, aqueous phase and solid state were studied in treating arsenic wastewater with FeS. The results showed that there is not AsH3 in gaseous phase and As(0)in aqueous phase. In soiled state there are As (0), FeAsO4, (FeAsO3) ,As2S3, (As2S5)and adsorbed arsenic present,but their forms and amounts in As(Ⅲ) wastewater differ from that in As( Ⅴ ) wastewater.The changes of arsenic forms indicate that the good effect of the treatment of arsenic wastewater with FeS is due to five coexisting reactions,i. e. precipitation,precipitation conversion,oxidation-reduction,adsorption precipitate and neutralization.

关 键 词：含砷废水 硫化亚铁 废水处理 砷 形态变化 

分 类 号：X703[环境科学与工程—环境工程]