Adsorption of Malachite Green with Sodium Dodecylbenzene Sulfonate Modified Sepiolite: Characterization, Adsorption Performance and Regeneration

被引：13
作者：
Yu, Jian [1 ]
Zhang, Lirong [1 ]
Liu, Bin [1 ,2 ]
机构：
[1] Hunan Univ, Coll Civil Engn, Dept Water Engn & Sci, Changsha 410082, Hunan, Peoples R China
[2] Katholieke Univ Leuven, Proc Engn Sustainable Syst ProcESS, Dept Chem Engn, Celestijnenlaan 200F, B-3001 Leuven, Belgium
来源：
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH | 2019年 / 16卷 / 18期
关键词：
malachite green; sodium dodecylbenzene sulfonate; sepiolite; organically modification; adsorption; PHOSPHATE ADSORPTION; CATALYTIC-REDUCTION; ACTIVATED CARBON; METHYLENE-BLUE; REMOVAL; DYE; NANOCOMPOSITE; WATER; DEGRADATION; KINETICS;
D O I：
10.3390/ijerph16183297
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The adsorption of malachite green (MG) onto sodium dodecylbenzene sulfonate (SDBS)-modified sepiolite was investigated with respect to pH, oscillation rate, MG dosage and adsorbent dosage. The modification condition and modified sepiolite characterization were examined. The conditions of 100% cation exchange capacity (CEC), pH value of 9, contact time of 60 min and 25 degrees C were deemed as the optimal conditions. The interlayer spacing of sepiolite was expanded and the surface hydrophobicity improved due to the entering of SDBS into the interlayer structure of the sepiolite ore. This is probably the reason for its adsorption enhancement. The adsorption of malachite green by organic sepiolite is in line with the quasi-secondary kinetic model. The results from the regeneration procedure suggest that a superior regeneration property obtained with 0.2 mol/L HCl concentration.
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页数：14
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