改性粉煤灰处理低浓度含砷含氨氮废水  

Treatment of Low Concentration Arsenic and Ammonium-nitrogen Containing Wastewater by Modified Fly Ash

作　　者：陈云嫩[1] 罗小燕[1] 熊昌狮 罗仙平[1] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《广州化工》2014年第22期146-148,共3页GuangZhou Chemical Industry

基　　金：国家"十二五"科技支撑计划课题(2012BAC11B07)

摘　　要：在冶金和采矿等行业里,排放废水中的砷和氨氮均存在不同程度的超标。本实验采用粉煤灰对砷和氨氮进行深度处理。考察了不同改性方法对粉煤灰除砷和氨氮的处理效果。实验结果表明:Na OH+Fe Cl3复合改性的粉煤灰对两种污染物都有较好的去除效果,废水中含砷2 mg/L,含氨氮50 mg/L,复合改性粉煤灰的投加量为20 g/L,废水p H为6,搅拌1 h,砷和氨氮的去除率分别达到83.33%和82.48%,出水满足《污水综合排放标准》(GB8978-1996)中砷和氨氮的排放要求。The emissions of arsenic and ammonium-nitrogen in wastewater often exceed the standard such as the metallurgical and mining industry. The fly ash was used to treat arsenic and ammonium-nitrogen deeply. Different modification methods on fly ash were examined for the removal of arsenic and ammonium-nitrogen from simulated wastewater. Experimental results showed that the NaOH＋FeCl3 modified fly ash had high efficiency on removal the two kinds of pollutants of arsenic and ammonium-nitrogen. When wastewater contained 2 mg/L arsenic and 50 mg/L ammonia nitrogen, NaOH＋FeCl3 modified fly ash dosage was 20 g/L, pH of the wastewater was 6, stirring for 1 h. The removal of arsenic and ammonium-nitrogen can reach 83. 33% and 82. 48%, respectively. The effluent met the Integrated Wastewater Discharge Standard （ GB8978-1996 ） in arsenic and ammonium emission requirements.

关 键 词：粉煤灰 砷 氨氮 低浓度 

分 类 号：X703[环境科学与工程—环境工程]