摘要
以阳离子表面活性剂十六烷基三甲基溴化铵为改性剂,采用浸渍法对硅藻土进行改性.通过室内实验,研究了该有机硅藻土对水中α-HCH、β-HCH、γ-HCH和δ-HCH的吸附作用.结果表明,十六烷基三甲基溴化胺能有效地提高硅藻土吸附水中4种HCH的能力.根据HCHs分配系数(Kow)的不同,改性硅藻土去除水中4种HCH的性能依次为:δ-HCH>γ-HCH>α-HCH>β-HCH.采用4种等温模型对吸附过程进行了模拟,Redlich-Peterson方程能更好地用于拟合HCH在改性硅藻土上的等温吸附曲线.
Adsorption of α-HCH、β-HCH、γ-HCH和δ-HCH by modified organo-diatomite(OD),which was modified by cetyltrimethylammonium bromide(CTMAB) was stadied.The cationic surfactant could bring the better adsorption efficiency of HCHs than using the raw diatomite.According to the partition coefficient(Kow),the adsorption efficiency of the four HCH onto OD followed the order: δ-HCH γ-HCHα-HCHβ-HCH.The four isotherms were selected to model the adsorption behavior of HCH onto OD.The best fit for the experimental adsorption data were given by the Redlich-Peterson model.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2011年第6期916-920,共5页
China Environmental Science
基金
国家自然科学基金资助项目(41073070)
教育部高等学校博士学科点专项科研基金(20090145110004)
第47期博士后面上基金(20100471205)
关键词
硅藻土
有机改性
吸附
HCHS
diatomite
organic modification
adsorption
HCHs