摘要
使用沸石对氨氮废水进行交换处理,沸石吸附氨氮(NHL_4^+-N)饱和后用NaCl溶液对其再生,研究再生前后沸石的交换穿透曲线。采用化学沉淀法对富含NH_4^+-N的再生液进行脱氯并考察其回收利用效果。结果表明:沸石对氨氯废水有很好的处理效果,再生沸石的动态交换穿透时间由60 min延长到160 mim;对沸石进行再生处理后的再生液经脱氮处理,得到NH_4^+-N质量浓度由141.6 mg/L降至12.65 mg/L。回收利用的再生液再生沸石的穿透时间延长到120 min。
Ammonia-nitrogen wastewater was treated by natural zeolite, and the saturated zeolite was re- generated by NaCl solution. The breakthrough curves of zeolite before and after regeneration were meas- ured. Ammonia-nitrogen was removed from the rich ammonia-nitrogen regeneration solution through chem- ical precipitation, and the reuse effect of regeneration solution was investigated. Results showed that zeo- lite had a good capacity for ammonia-nitrogen wastewater treatment. Breakthrough time of regenerated ze- olite extended from 60 min to 160 min. After nitrogen desorption, the ammonium concentration of the used regeneration solution decreased from 141.6 mg/L to 12.65 mg/L. The reused regeneration solution re- generated zeolite again, and the breakthrough time delayed to 120 min.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2012年第4期110-113,共4页
Journal of Nanjing Tech University(Natural Science Edition)
基金
江苏省省级环保科技资金资助项目(2006003)
关键词
沸石
离子交换
再生
穿透
化学沉淀
zeolite
ion exchange
regeneration
breakthrough
chemical precipitation
