摘要
Cr(Ⅵ)是一种高毒性重金属。为了探究炭质材料对水中六价铬的吸附行为,首次尝试用不同浓度的锰离子溶液对颗粒活性炭进行改性,研究了包括pH、温度、投加量和Cr(Ⅵ)初始浓度对原活性炭和改性活性炭的对比实验。结果表明在相同的条件下锰离子改性可以增加活性炭对Cr(Ⅵ)的吸附容量,溶液pH、温度、投加量和初始浓度对Cr(Ⅵ)的去除率有很大影响。活性炭对Cr(Ⅵ)的吸附等温线与Langmuir模型有更好的线性相关性。
Hexavalent chromium is a highly toxic heavy metal. In order to explore the adsorptive behavior of carbonaceous materials for hexavalent chromium in aqueous solution, as the first attempt, activated carbons were modified by Mn2 ~ with different concentrations. Contrast experiments were conducted using original activated carbon and modified activated carbon at different conditions such as pH, temperature, dosages and initial concentrations. The results showed that the activated carbon modified with Mn2＋ solution could improve Cr（Ⅵ） adsorptive capacity at same conditions, the factors such as pH, temperature, dosage and the initial concentrations affected the Cr（Ⅵ） removal rates. The adsorption isotherms of activated carbon to Cr（Ⅵ） had better linear correlation with the Langmuir modal.
出处
《四川环境》
2013年第1期6-11,共6页
Sichuan Environment
基金
教育部留学人员回国启动基金(1061-51200312)
中央高校(河海大学)基本科研业务费专项资金(B11020157)
江苏水利科技项目基金(1061-51146012)
