钙基膨润土的组合改性及对垃圾渗滤液的处理

Combined Modification Technology of Ca-Bentonite and its treatment of garbage leachate

钙基膨润土的钠化改型工艺简单、实用性强 ;酸改性后的膨润土对于金属离子具有较强的吸附能力 ;有机改性后的膨润土对有机物具有较强的吸附能力 ;而“组合”改性后的膨润土 ,对金属离子和有机物都具有较强的吸附能力。利用“组合”改性后的膨润土作吸附剂 ,处理垃圾渗滤液 ,效果比较理想 ,CODCr的去除率可达 79%、重金属离子的去除率 5 3 %～ 98%、氨氮去除率达 46%。

The technology of making Na-bentonite from Ca-bentonite was both relatively simple and practical, and acid modified bentonite could adsorb metal ions effectively, and organically modified bentonite might adsorb organic matter much more than the original. The combined modified bentonite was able to adsorb both metal ions and organic matter efficiently. When the combined modified bentonite was used as the adsorbent, the result of garbage leachate treatment was ideal. The removal percentages of COD Cr ,heavy metals and ammoniacal nitrogen respectively were 79%,53%～98% and 46%.