超声辅助改性粉煤灰对废水中氨氮去除率的影响  

Influence of Ultrasound-assisted Modified Fly Ash on Removal of Ammonia Nitrogen in Wastewater

作　　者：缪应菊[1] 敖显字 胡庆林[1] 连明磊[1] 李琳[1] 

机构地区：[1]六盘水师范学院化学与化学工程系,贵州六盘水553004

出　　处：《湿法冶金》2016年第4期349-352,共4页Hydrometallurgy of China

基　　金：贵州省教育厅特色重点实验室资助项目(黔教高发:2011-278);贵州省教育厅自然科学研究项目(黔教合KY字[2013]201);贵州省普通高等学校煤系固体废弃物资源化技术创新团队项目资助(黔教合人才团队字[2014]46号);贵州省科学技术基金资助项目(黔科合J字LKLS[2013]25)

摘　　要：研究了以超声波辅助改性粉煤灰并应用于氨氮废水处理,考察了粉煤灰改性方式、超声功率、超声时间、改性温度、氢氧化钠浓度对粉煤灰的改性效果。结果表明:粉煤灰的碱改性过程中,只要保持n(OH-)不变,氢氧化钠用量和浓度对粉煤灰的改性效果均无影响;将超声功率为240 W、60℃下超声3h制得的改性粉煤灰用于从废水中去除氨氮,氨氮去除率为81.9%,比未改性粉煤灰对氨氮的去除率提高34%。The treatment of wastewater containing ammonia nitrogen using fly ash modified by ultrasound-assisted was studied.The effects of modification type,ultrasound power,ultrasound time,modified temperature,NaOH amount and concentration on removal of ammonia nitrogen were examined.The results show that the NaOH amount and concentration are no effect on the removal of ammonia nitrogen if keeps n（OH^-）constant and modify 3hunder ultrasound power 240 W.When the modified temperature is 60 ℃,removal rate of ammonia nitrogen can reach 81.9% and increases 34%than that of original fly ash.

关 键 词：粉煤灰 超声波 改性 氨氮 去除 

分 类 号：X703[环境科学与工程—环境工程]