摘要
对山西铝厂氧化铝生产的废料赤泥,经微波煅烧活化后,用来处理含铬废水进行了研究,探讨了微波活化功率、活化赤泥加入量、接触时间及初始浓度等对除铬效果的影响,并对作用机理进行了分析。结果表明,活化赤泥对Cr3+有较好的吸附作用,对Cr6+也有一定的吸附作用。当赤泥在800W微波活化30min后,处理含Cr3+浓度在300mg/L以下的废水,以铬含量和活化赤泥比为1:200(质量比)的比例加入,除去率可达99%以上。对于含Cr6+废水,采用先加入硫酸亚铁还原,再加入活化赤泥,可使含Cr6+浓度在300mg/L以下的废水处理后达到国家排放标准。
The treatment of chromium- containing wastewater with microwave activated red mud which is by - produce of aluminum oxide industry was experimentally investigated. The influence of the microwave activated power of red mud, dosage and contacting time on treatment efficiency were discussed. The results showed that the rate of removing chromium is over 99 % in the range of Cr^3＋ ≤300mg/L when the red mud activated for 30min at 800W were added into chromium - containing wastewater with mass ratio of red mud to chromium 200 ： 1, and the outlet water reached national effluent discharge standard. As for chromium（ Ⅵ ） - containing wastewater in the range of Cr^6 ＋ ≤300mg/L, the outlet water also reached national effluem discharge standard by using red mud treatment after adding FeSO4.
出处
《轻金属》
CSCD
北大核心
2005年第9期16-19,共4页
Light Metals
关键词
赤泥
铬
微波活化
废水处理
Red mud： Chromium
microwave activated
Treatment of wastewater
