化工进展2017，Vol.36Issue(4)：1374-1380,7.DOI:10.16085/j.issn.1000-6613.2017.04.029
HTMAC/KH550/膨润土吸附剂的制备、表征及其在甲基橙废水的吸附行为
Preparation,characterization of HTMAC/KH550/bentonite adsorbent and its adsorption behavior on methyl orange wastewater
摘要
Abstract
Organobentonites were prepared by modifying calcium bentonite using hexadecyltrimethyl- ammonium chloride(HTMAC)and silane coupling agent(KH550)as intercalation agents. The characteristics of swelling volume,colloid valence,and ethylene blue adsorbed were measured. Organobentonites were characterized with fourier transform infrared(FTIR),X-ray powder diffraction (XRD),scanning electron microscope(SEM)and brunauer -emmett-teller(BET). Results showed that the ability of dispersion and adsorption of organics increase with the increase of colloid valence and ethylene blue adsorbed. Under theco-modification of HTMAC and KH550,the modified reagents has been intercalated to the layer of bentonite,and thed001 values increase from 1.53nm to 2.89nm. The N2 adsorption–desorption isotherm exhibited that organobentonite has type Ⅳ isotherm with a clear H3 hysteresis loop,which indicated that HTMAC/KH550/bentonite was a mixed microporous/ mesoporous material. Organobentonites were used to treat methyl orange wastewater. The effects of dosage,flocculation time,adsorption temperature and pH were investigated. Result showed that the highest removal rate of methyl orange wastewater was 89.8%. The optimum operationcondition were dosage of organobentonite 2g/L,flocculation time 30min,pH7—8 and adsorption temperature 20℃. Adsorption equilibrium studies showed that methyl orange adsorption follows the Langmuir model. In addition,the maximum adsorption capacity of the organobentonite was determined to be 71.53mg/g.HTMAC/KH550/bentonite is a kind of high adsorption capability adsorbent. It can provide a new method for dye removal.关键词
有机膨润土/甲基橙废水/吸附剂/硅烷偶联剂/脱色率Key words
organobentonite/methyl orange wastewater/adsorbents/silane coupling agent/removal rate分类
资源环境引用本文复制引用
姚培,李树白,刘媛,张启蒙,季从兰,聂华丽..HTMAC/KH550/膨润土吸附剂的制备、表征及其在甲基橙废水的吸附行为[J].化工进展,2017,36(4):1374-1380,7.基金项目
江苏省高校"青蓝工程"科技创新团队项目、2015年江苏省大学生创新创业计划项目(201513102003Y3)、江苏高校品牌建设工程资助项目(PPZY2015B178)及江苏省高校优秀中青年教师和校 长境外研修计划. （201513102003Y3）
