摘要
酸改性粉煤灰较粉煤灰对废水中的铬(Ⅵ)有较大吸附性。实验结果表明,改性粉煤灰处理含铬(Ⅵ)废水的最佳吸附条件:改性粉煤灰0.6 g、初始浓度10μg/mL、吸附时间25 min、pH=2~4、吸附温度20℃~30℃,最佳条件下改性粉煤灰对铬(Ⅵ)有较好的去除效果,去除率达96.5%。改性粉煤灰对铬(Ⅵ)的吸附以物理吸附为主,符合Freundlich等温吸附式。
Acid modified fly ash had higher adsorption capacity for chromium （VI） in wastewater than fly ash. The experiment results showed that removal rate of chromium （Ⅵ） can reach 96.5% under pH value at 2-4, initial chromium （VI） concentration at 10 μg/mL, modified fly ash dosage of 0.6 g, adsorption time at 25 rain and adsorption temperature at 20 ℃ -30 ℃. The adsorption behavior of modified fly ash to chromium （Ⅵ） accorded with Freundlich isotherm adsorption, mainly with physical absorption.
作者
贺龙强
付克明
胡鹏
HE Long-qiang;FU Ke-ming;ItU Peng(College of Chemical Industry and Environment Engineering, Jiaozuo University, Jiaozuo 454000, Chin)
出处
《煤炭技术》
CAS
2018年第7期324-326,共3页
Coal Technology
基金
河南省科技发展计划项目(172102310469)
焦作市科技计划项目(20170155)
关键词
粉煤灰
改性
吸附
含铬(Ⅵ)废水
fly ash
modification
absorption
chromium-containing（Ⅵ） wastewater
