作　　者： ; ; ; ; ; ; ; ;

机构地区： 广东工业大学环境科学与工程学院

出　　处： 《环境污染与防治》 2013年第10期33-35,41,共4页

摘　　要： 采用次氯酸钠处理铅锌矿尾矿库外排废水,考察了次氯酸钠投加量、次氯酸钠游离碱含量、搅拌强度和反应时间对废水COD去除效果和pH的影响,并比较了H2O2的氧化处理效果。结果表明,在次氯酸钠投加量为125g/t、次氯酸钠游离碱为0.8%(质量分数)、搅拌强度为60r/min、反应时间为40min的最佳试验条件下,尾矿库外排废水COD为40～60mg/L,pH为6.0～7.0。 Batch experiments were carried out to treat wastewater dminaged from a lead-zinc mine railings reservoir by NaC10. The effects of NaC10 dosage,free alkalinity content of solution,stirring intensity and reaction time on wastewater pH and COD removal efficiency was investigated,and the oxidation treatment performance of NaC10 was compared with Hz 02. The optimal treatment conditions were obtained as follow： NaC10 125 g/t,0. 8 % （wt%） of free alkalinity, 60 r/min of stirring intensity and reacted for 40 min. Under these optimal conditions, the COD of wastewater in tailings reservoir reduced to 40-60 mg/L,and pH ranged 6.0-7.0.

关 键 词： 次氯酸钠 铅锌矿 尾矿库外排废水

领　　域： [环境科学与工程]