摘要
研究了天然膨润土、钠化膨润土和CTMAB(十六烷基三甲基溴化铵)有机改性膨润土对水中磷酸盐的吸附去除作用,考察了膨润土用量、振荡时间、溶液pH对磷酸盐吸附的影响,并绘制了吸附等温线。结果表明:CTMAB有机膨润土的吸附能力远大于原土,当pH值在酸性范围内时,磷酸盐的去除效率较高,吸附是一个快速的过程,可在60 min内达到吸附平衡,吸附等温线符合Langmuir和Freundlich方程。膨润土储量丰富、价廉易得,其改性产物可以成为处理磷酸盐污染,降低水体富营养化污染的高效吸附剂。
Cetyl trimethylammonium bromide modified bentonite was prepared, characterized, and its adsorption properties for phosphate were evaluated in batch experiments. The effects of adsorbent dosage, adsorption time and solution pH on the phosphate were also conducted. The results showed that the ability of phosphate adsorption by CTMAB bentonite was far more than that of Na - bentonite and raw bentonite. The process of phosphate adsorption was rapid and reached equilibrium within 60 min. The Freundlich model and the Langmuir model were both described the adsorption isotherm data well. These results indicated that the surfactant modified bentonites were potential adsorbents for the phosphate removal from water.
出处
《环境科学与管理》
CAS
2009年第8期62-64,共3页
Environmental Science and Management
基金
山东省中青年科学家科研奖励基金项目(2008BS09008)
