【摘要】 本文介绍了硫化铁处理铬（Ⅵ）废水的进一步研究结果。实验结果表明:铬（Ⅵ）的去除率均在99%以上,出水铬（Ⅵ）含量不仅达到废水的排放标准（≤0.5mg/L）,对低浓度铬（Ⅵ）废水经硫化铁处理后还能达到饮用水标准（≤0.05mg/L）。与一般还原剂不同,硫化铁为难溶化合物,其中的Fe²⁺和S^2-都是强还原剂。因此,在比较宽广的pH值（2～10）范围内,铬（Ⅵ）均可被还原成铬（Ⅲ）而除去,且无二次污染。实验结果还说明,硫化铁除铬（Ⅵ）效果好是由于存在还原、"中和"和絮凝三种作用的结果。更多还原

【Abstract】 This paper describes the results of a further study on the ferrous sulfide treatment of chromium（Ⅵ）wastewater.The experimental results indicated that the rates of Cr（Ⅵ）removal were above 99%,and that the contents of chromium（Ⅵ） in the effluent have reached the discharge standard for wastewater（≤0.5mg/L） and even reached the standard for drinking water （≤0.05mg/L） in low-concentration wastewater.Unlike other reductants, ferrous sulfide is an insoluble compound,and it’s Fe²⁺ and S^2- are both strong reductants.Therefore in a more extensive pH range（2-10）,Cr（Ⅵ） could be removed by being reduced to Cr（Ⅲ）,and there is no secondary pollution.The experimental results also indicated that such good effects are due to three coexisting reactions,i.e.reduction,neutralization and flocculution.更多还原