摘要
采用电位调控-硫化沉淀法对含Zn2＋100 mg/L的矿山酸性废水进行深度处理.结果表明，采用10%石灰乳液为中和药剂预先除铁，其用量为7.5-14 mL/L，沉铁时间为30 min，铁的去除率可以达到80%以上；除铁后的溶液采用硫化法沉淀锌，以NaHS为硫化剂，pH值为3.4，PAM用量为1 mL/L，氧化还原电位控制在6-76 mV时，矿山酸性废水中的Zn2＋的去除率达到96.85%以上.
Potential regulation-sulfide precipitation are used to treat zinc-containing mine acid drainage with the concentration of 100mg/L deeply. When 10 % CaO is selected as a neutralizing agent to remove iron, （the amount of 10 % CaO 7.5-14 ml/L, precipitation time of iron 30 min）, the removal rate of iron could reach above 80 %. Vulcanization is performed on the de-ironed solution to precipitate zinc using NaHS as the vulcanizing agent, （with the sulfide precipitation zinc pH value of 3.4, the dosing quantity of PAM flocculant of 1mL/L, and ORP of at 6-76 mV）, the removal rate of zinc ions in acid drainage can be over 96.85 %.
出处
《有色金属科学与工程》
CAS
2014年第3期81-85,106,共6页
Nonferrous Metals Science and Engineering
基金
江西省对外科技合作计划项目(20133BDH80027)
江西省教育厅青年科学基金(GJJ10154)
江西省博士后科研择优资助项目
关键词
矿山酸性废水
锌回收
电位调控-硫化沉淀
mine acid drainage
zinc recovery
potential regulation-sulfide precipitation
