改性粉煤灰吸附废水中Cd^(2+)、Pb^(2+)、Cu^(2+)的试验研究  

Experimental Study on Adsorbing Cd^(2+), Pb^(2+), Cu^(2+) in Wastewater by Modified Fly Ash

作　　者：吕志江[1] 刘云国[1] 樊霆[1] 何义超[1] 周娜[1] 

机构地区：[1]湖南大学环境科学与工程学院,长沙410082

出　　处：《非金属矿》2008年第3期57-59,共3页Non-Metallic Mines

基　　金："十一五"国家科技支撑计划(2006BAD03A1704;2006BAD03A1706)

摘　　要：采用改性后的粉煤灰为主要原料,对含Cd2+、Pb2+、Cu2+的模拟废水进行了吸附实验,结果表明,废水中Cd2+、Pb2+、Cu2+的初始浓度、粉煤灰用量、pH值、吸附时间等因素均能影响粉煤灰对Cd2+、Pb2+、Cu2+的吸附效果。在Cd2+、Pb2+、Cu2+初始浓度均为40mg/L,pH=7,搅拌3h,粉煤灰的投加量分别为14、10、12g/L的条件下,Cd2+、Pb2+、Cu2+的去除率分别达到96.53%、99.21%、97.49%。粉煤灰对Cd2+、Pb2+、Cu2+的吸附等温线符合Freundilich和Langmuir两种模式。The modified fly ash was used to remove Cd^2＋, Pb^2＋ and Cu^2＋ from simulated wastewater. The experiment results showed that the adsorption capability was affected by the initial concentration of Cd^2＋, Pb^2＋ and Cu^2＋, pH value, adsorption time and the dosage of fly ash. The result also demonstrated that the removal rate of Cd^2＋, Pb^2＋ and Cu^2＋ could reach to 96.53%, 99.21% and 97.49%, respectively within 3 hours at the solid/ liquid ratio of 14, 10 and 12g/L, pH=7, when Cd^2＋, Pb^2＋ and Cu^2＋ concentration at 40mg/L. Simulation to the adsorption process showed that the process could be fitted well by both Freundilich and Langmuir Equation.

关 键 词：改性粉煤灰 吸附 CD^2+ PB^2+ CU^2+ 吸附等温线 

分 类 号：X703[环境科学与工程—环境工程]