污泥活性炭对复合染料的脱色及其重金属浸出毒性  

Decoloration on complex dyes and heavy metals leaching of activated carbon from sewage sludge

作　　者：范晓丹[1,2] 康婷婷[1] 尹乐[1] 王睿[1] 杨慧[1] 孟晓苓[1] 徐廷献[3] 

机构地区：[1]天津城市建设学院环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384 [3]天津大学材料科学与工程学院,天津300072

出　　处：《环境工程学报》2012年第10期3623-3628,共6页Chinese Journal of Environmental Engineering

基　　金：天津市应用基础及前沿技术研究计划资助项目(07JCZDJC02200);天津城市建设学院学生科技活动基金资助项目

摘　　要：用自制的污泥活性炭处理亚甲基蓝与酸性品红组成的染料废水,研究了pH、吸附时间、温度等因素对复合组分染料废水脱色率的影响,测试分析了污泥活性炭在处理亚甲基蓝与酸性品红复合组分染料废水过程中的重金属浸出毒性。结果表明:与处理单一组分染料废水相比较,处理复合染料废水时pH的影响较为复杂,2种染料在污泥活性炭上存在竞争吸附,但是污泥活性炭对复合组分染料的脱色效果较好。污泥活性炭对复合染料的吸附过程符合Langmuir型吸附。在处理染料废水的过程中,污泥活性炭中的重金属镉、锌及铬会浸出,重金属镉、锌的浸出浓度符合国家标准,但铬的浸出浓度已接近国家标准上限。Activated carbons from sewage sludge were used to treat complex dyes wastewater of methenyl blue and acid magenta.The effects of pH,temperatures and adsorption times on the decoloration rates were investigated.The leaching concentrations of heavy metals were analyzed.The results show that the decoloration rates of complex wastewater from methenyl blue and acid magenta are much higher than those of methenyl blue or acid magenta only.The effect of pH on the decoloration rates is difficult to be explained.Competitive adsorption of methenyl blue and acid magenta appears on the activated carbons from sewage sludge.The adsorption of complex wastewater from methenyl blue and acid magenta follows Langmuir isotherm.The leaching concentrations of Cd,Zn and Cr increase with treatment time.The leaching concentrations all meet the standard for hazardous wastes in China.However,the leaching concentrations of Cr nearly arrive the limit of the standard.

关 键 词：污泥活性炭 染料 脱色 重金属浸出毒性 

分 类 号：X703[环境科学与工程—环境工程]