粉煤灰处理Cr^6＋废水的试验研究  

Treatment of Wastewater Containing Cr^(6+) with Fly Ash

作　　者：尹国勋[1] 王亮亮[1] 杨寅[2] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]武汉科技学院环境与城建学院,湖北武汉430073

出　　处：《环境科学与技术》2008年第11期127-129,共3页Environmental Science & Technology

摘　　要：利用电厂粉煤灰进行了处理含铬(VI)废水试验,探讨了粉煤灰投加量、pH值、接触时间、温度和含铬浓度等因素对除铬效果的影响。结果表明,在废水pH=10左右、Cr6+浓度<100mg/L,粉煤灰的用量140g/L时,在常温下吸附处理2h,对铬的去除率可达到72%以上。粉煤灰吸附处理含铬废水符合Freundlich等温式,以物理吸附为主。对于低浓度含铬(VI)的废水,处理后可达标排放。By using fly ash from power plant to treat wastewater containing Cr^6＋, factors including fly ash dosage, pH, exposure time, temperature and concentration of chromium on removal effect of chromium were studied. Results showed that under pH about 10, Cr^6＋ concentration less than 100mg/L, fly ash amount of 140g/L and adsorption at room temperature for 2h, removal efficiency of chromium can be above 72%. Absorption treatment of wastewater containing chromium with fly ash satisfied Freundlich isotherm, with physical process as major adsorption. Low concentration of Cr^6＋ wastewater can be treated and discharged to the standard.

关 键 词：粉煤灰 含铬废水 吸附 吸附等温线 六价铬离子 

分 类 号：X703[环境科学与工程—环境工程]