Evaluation of BTEX and phenol removal from aqueous solution by multi-solute adsorption onto smectite organoclay

被引：79

作者：

Carvalho, M. N. ^{[1
]}

da Motta, M. ^{[1
]}

Benachour, M. ^{[1
]}

Sales, D. C. S. ^{[1
]}

Abreu, C. A. M. ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Engn Quim, BR-50740521 Recife, PE, Brazil

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2012年 / 239卷

关键词：

Adsorption; Multi-solute; Organoclays; Wastewater; LOW-COST ADSORBENTS; ORGANIC-COMPOUNDS; P-NITROPHENOL; WASTE-WATER; SORPTION; CLAY; BENTONITE; MECHANISM; BENZENE; TOLUENE;

D O I：

10.1016/j.jhazmat.2012.07.057

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The removal process of BTEX and phenol was evaluated. The smectite organoclay for single-solute system reached removal was evaluated by adsorption on smectite organoclay adsorbent by kinetic and equilibrium efficiencies between 55 and 90% while was reached between 30 and 90% for multi-solute system at 297 K and pH 9. The Langmuir-Freundlich model was used to fit the experimental data with correlation coefficient between 0.98 and 0.99 providing kinetic and equilibrium parameter values. Phenol and ethylbenzene presented high maximum adsorbed amount, 8.28 and 6.67 mg/g, respectively, compared to the other compounds for single-solute. Toluene and p-xylene presented high values of adsorption constant which indicates a high adsorption affinity of compounds to organoclay surface and high binding energy of adsorption. Phenol presented low kinetic adsorption constant value indicating slow rate of adsorption. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：95 / 101

页数：7

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