摘要
以表面活性剂十六烷基三甲基溴化铵(CTMAB)溶液和聚合铝、聚合铁溶液为改性剂,制备了相应的改性膨润土吸附剂:CTMAB有机膨润土、铝柱撑膨润土和铁柱撑膨润土,用以吸附去除水中的氨氮。结果表明:在最佳吸附实验条件下,几种改性膨润土均能够较好地吸附水中的氨氮,改性膨润土的吸附能力大于原土,吸附量的顺序为:铝柱撑膨润土>铁柱撑膨润土>CTMAB有机膨润土>原土。改性膨润土对氨氮的吸附是一个快速的过程,可在60min达到吸附平衡,吸附等温线符合Langmuir和Freundlich方程。
In this paper, three modified bentonites of surfactant cetyhrimethylammonium bromide （CTMAB）, polymeric aluminum and polymeric iron solution as modifiers, CTMAB organo-bentonite, hydroxy-aluminum pillared bentonite and hydroxy-iron pillared bentonite were prepared, and its adsorption properties for the removal of ammonia nitrogen from water were evaluated in batch experiments. The results showed that the adsorption ability of ammonia nitrogen by modified bentonites was far more than that of raw bentonite. The adsorption capacity followed the order： Al-bentonite 〉 Fe-bentonite 〉 CTMAB-bentonite 〉 raw bentonite. The adsorptive rate of ammonia nitrogen was rapid and can be equilibrium within 60 minutes. The Freundlich model and the Langmuir model were both described the adsorption isotherm data well.
出处
《环境科技》
2009年第4期1-3,共3页
Environmental Science and Technology
基金
山东省中青年科学家科研奖励基金项目(2008B509008)
关键词
膨润土
改性膨润土
吸附
氨氮
Bentonite
Pillared bentonite
Adsorption
Ammonia nitrogen
