核工业北京化工冶金研究院;
针对某矿区含硫铀废石堆含铀酸性超标渗出水，研究了其超标组分的去除方法。首先在超标废水中添加1 g/L矿粉去除Cd、Cu及部分U,再将南、北两侧废石堆场渗出水pH分别由2.78、2.66调节至4.70、4.30,并在最佳接触反应时间为30 min条件下，对比了Mg(OH)_2、Ca(OH)_2、Na_2CO_3和NaOH深度法除矿粉处理后渗出水中U、Mn、Zn的效果。结果表明：相较而言，Ca(OH)_2对U、Mn、Zn去除效果最优；在南、北两侧废石堆场渗出水的Ca(OH)_2加入量分别为0.32和0.96 g/L、渗出水pH为7～8条件下，U去除率达99.8%以上，Cu、Cd去除率均达90%以上，Zn去除率达95%以上，Mn去除率达75.5%以上，且沉降速度快，静置60 min悬混液体积可缩减70%左右；对Ca(OH)_2加入过程中离子浓度变化的精确计算和沉淀物表征结果表明，净化过程中有类水滑石物质生成，Mn2+、Zn2+进入水滑石结构中被去除，铀酰离子可能通过与水滑石间静电吸附、表面配合或通过层间阴离子交换等方式实现去除。
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基本信息:
DOI：10.13355/j.cnki.sfyj.2025.02.014
中图分类号:X591;X75
引用信息:
[1]王扬.从某矿区含铀酸性渗出水中去除超标组分研究[J].湿法冶金,2025,44(02):247-255.DOI:10.13355/j.cnki.sfyj.2025.02.014.
基金信息: