摘要
考察了单组分和混合组分条件下温度和pH对活性炭吸附废水中Cr(Ⅵ)、As(Ⅲ)的影响,实验结果表明:在单组分条件时,活性炭对Cr(Ⅵ)的最佳吸附温度和pH为35℃和2.00,对As(Ⅲ)的最佳吸附温度和pH为30℃和6.00;在混合组分条件时,溶液中的As(Ⅲ)对Cr(Ⅵ)的吸附有一定的抑制作用,随着As(Ⅲ)质量浓度的增加,对Cr(Ⅵ)吸附的抑制作用增大;溶液中有Cr(Ⅵ)时,As(Ⅲ)的吸附量增大,但随着Cr(Ⅵ)质量浓度的增加As(Ⅲ)的吸附量减小。pH和温度对溶液中Cr(Ⅵ)或As(Ⅲ)的吸附量变化趋势影响不大。
The effects of temperature and pH on activated carbon adsorption of Cr(Ⅵ) and As(Ⅲ) in wastewater were studied under the conditions of single component and mixed component systems. The experimental results show that:Under the single component system condition,the optimum temperature and pH for adsorption of Cr(Ⅵ) are 35℃and 2.00,and 30℃and 6.00 for As(Ⅲ); Under the mixed component system condition,As(Ⅲ) in solution can inhibit the adsorption of Cr (Ⅵ) and the inhibition effect can be enhanced with the increasing of As(Ⅲ) mass concentration;The adsorption quantity of As(Ⅲ) increases with the existence of Cr(Ⅵ) in solution,but it decreases with the increasing of Cr(Ⅵ) mass concentration;Temperature and pH have no significant effects on the adsorption of Cr(Ⅵ) or As(Ⅲ).
出处
《化工环保》
CAS
CSCD
北大核心
2010年第2期108-112,共5页
Environmental Protection of Chemical Industry
关键词
铬
砷
活性炭
吸附
废水处理
chromium
arsenic
activated carbon
adsorption
wastewater treatment
