采用阳离子聚电解质聚二甲基二烯丙基氯化铵(PDMDAAC)和硅烷偶联剂(KH550)对钙基膨润土进行改性,得到有机改性膨润土。研究发现,PDMDAAC和KH550成功负载在膨润土表面,其结构没有发生改变。以苯酚为吸附对象,采用该有机改性膨润土对其进行模拟吸附,当有机改性膨润土的投加量为2g/L,吸附时间20min,pH=7,温度30℃时,苯酚废水去除率高达87%。有机膨润土吸附苯酚符合Langmuir等温吸附模型,为表面化学吸附过程。
The organo-modified bentonite was prepared from Ca-bentonite modified by cationic polyelectrolyte polydimethyldiallyl ammonium chloride (PDMDAAC) and silane coupling agent (KH550).It was found that PDMDAAC and KH550 were successfully loaded on the bentonite surface without any change in the structure.The simulated adsorption of organo-modified bentonite on phenol was studied.The removal rate of phenol in wastewater was as high as 87% at the adsorption amount of 2g/L,adsorption time of 20min,pH=7,and temperature of 30℃.The adsorption of phenol by organobentonite conformed to the Langmuir isothermal adsorption model and the surface chemical adsorption process.
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基金资助
2020—2022年江苏“青蓝工程”优秀教学团队项目(苏教师函[2020]10号);常州工程职业技术学院院级科技创新团队项目(常工职院科[2019]7号);常州市科技支撑计划(社会发展)(CE20195007);中国特色高水平专业建设计划建设(应用化工技术专业群)教职成函[2019]14号
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