焦炭及其改性吸附预处理焦化废水的试验研究  

MODIFIED COKE DEAL WITH COKE WASTE WATER BY ADSORPTION

作　　者：孙慧芳[1] 和彬彬[1] 郭栋生[1] 

机构地区：[1]山西大学环境与资源学院,山西太原030006

出　　处：《水处理技术》2009年第10期55-58,共4页Technology of Water Treatment

摘　　要：采用经化学改性前后的焦炭对焦化废水进行吸附预处理,并对其吸附性能进行了检测。结果表明,焦炭对焦化废水中的COD、挥发酚、氨氮和氰化物均有一定的去除效果,分别为相同条件下活性炭对上述污染物去除率的15.48%、16.41%、39.47%和172.84%。化学改性可使焦炭对焦化废水中氨氮和氰化物的吸附性能明显的提高,其中HNO3改性对焦炭吸附废水中氨氮和氰化物能力的增加效果显著,对氨氮的吸附常数从未改性前的0.0097L·mg-1增加为0.077L·mg-1;对氰化物的吸附常数从未改性前的0.0024L·mg-1增加为0.0739L·mg-1。KOH改性对焦炭吸附废水中氰化物能力的增加效果明显,对氰化物的吸附常数从未改性前的0.0024L·mg-1增加为0.0955L·mg-1。The adsorption performance of coke and modified cokes in the process ofcoking wastewater treatment has been determined in the experiment. The results showed that the coke can remove the COD, phenol, ammonia nitrogen and cyanide in the coking wastewater, but the removal rate is only 15.48%, 16.41% ,39.47% and 172.84 % for above pollutants compared with activated carbon. The chemical modification for coke can increase its adsorption ability for ammonia nitrogen and cyanide in the coking wastewater significantly. The coke modified by HNO3 has obvious effect on the adsorption capacity for ammonia nitrogen and cyanide. The adsorption constant of ammonia nitrogen can change from 0.009 7 L·mg^-1 to 0.077 L·mg^-1, and the adsorption constant of cyanide can change from 0.002 4 L·mg^-1 to 0.073 9 L·mg^-1. The coke modified by KOH has obvious effect on the adsorption capacity for cyanide, and the adsorption constant can change from 0.002 4 L·mg^-1 to 0.095 5 L·mg^-1.

关 键 词：焦炭 改性 吸附 焦化废水 

分 类 号：TQ424[化学工程] X784[环境科学与工程—环境工程]