摘要
锰矿采选带来的含锰废水不仅会对环境造成污染也会对人体和动物健康造成威胁,研究讨论了锰矿废水的来源以及当前主要的处理技术。研究通过絮凝沉淀联合铁氧复合体来处理某锰矿采选废水,通过正交试验得到以PAM为絮凝剂。对于悬浮物的去除来说,最佳试验条件为混凝剂投加量为1.5 mg/L,pH为7,沉淀5 min;对于Mn^(2+)的去除来说,最佳试验条件为混凝剂投加量为1.5 mg/L,pH为8,沉淀20 min。通过对比试验得到最佳铁氧复合体处理条件为pH为9.5,Fe^(2+)与Mn^(2+)投料比为6,在最佳试验条件下,絮凝联合铁氧复合体沉淀对某锰矿采选废水中的出水悬浮物去除率可达到85.7%,Mn^(2+)去除率可达98.2%,Mn^(2+)出水浓度低于国家工业污水排放标准。
Manganese wastewater from manganese mining and beneficiation will not only pollute the environment,but also threaten human and animal health.The source of manganese ore wastewater and the main treatment technology are discussed.This paper studies the treatment of manganese ore mining wastewater by flocculation and sedimentation combined with iron oxide complex.Through an orthogonal test,the best experimental conditions are obtained with PAM as flocculant.For the removal of suspended solids,the best experimental conditions are coagulant dosage of 1.5 mg/L,pH value of 7,precipitation for 5 min.For the removal of Mn^(2+),the optimal experimental conditions were as follows:the dosage of coagulant was 1.5 mg/L,pH value was 8 and the precipitation time was 20 min.The results show that the optimal treatment conditions were pH 9.5 and the ratio of Fe^(2+)to Mn^(2+)was 6.Under the optimal experimental conditions,the removal rate of suspended solids and Mn^(2+)in the effluent of a manganese ore mining wastewater can reach 85.7%and 98.2%,respectively.The effluent concentration of Mn^(2+)is lower than the national industrial wastewater discharge standard.
作者
王诗言
孙朋涛
刘书缘
WANG Shiyan;SUN Pengtao;LIU Shuyuan(College of Chemistry and Chemical Engineering, Yan’an University, Yan’an, Shanxi 716000, China;Xinjiang Xuanli Environmental Energy Co., Ltd., Hami, Xinjiang, 839303, China)
出处
《中国锰业》
2021年第6期34-38,共5页
China Manganese Industry
关键词
锰矿
采选废水
絮凝沉淀
铁氧复合体
Manganese ore
Mining wastewater
Flocculation sedimentation
Iron oxide complex
