Efficient removal of naphthalene from aqueous solutions using a nanoporous kaolin/Fe3O4 composite

被引：32
作者：
Arizavi, A. [1 ]
Mirbagheri, N. S. [1 ]
Hosseini, Z. [2 ]
Chen, P. [3 ]
Sabbaghi, S. [1 ]
机构：
[1] Shiraz Univ, Fac Adv Technol, Nanochem Engn Dept, Shiraz, Iran
[2] Shiraz Univ, Fac Adv Technol, Nanoelect Dept, Shiraz, Iran
[3] Univ Waterloo, Dept Chem Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada
来源：
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY | 2020年 / 17卷 / 04期
关键词：
Adsorption; Kaolin; Magnetic composite; Naphthalene; Wastewater treatment; RESPONSE-SURFACE METHODOLOGY; ACTIVATED CARBON; AROMATIC-HYDROCARBONS; ADSORPTIVE REMOVAL; NANO-PHOTOCATALYST; WASTE-WATER; SORPTION; OXIDE; ADSORBENT; OPTIMIZATION;
D O I：
10.1007/s13762-019-02521-1
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The presence of naphthalene in environment has carcinogenic properties and threatens human health. Therefore, the removal of naphthalene from wastewater using eco-friendly materials and novel technologies has received tremendous attention. In this study, the performance of a kaolin/Fe3O4 composite toward the uptake of naphthalene from aqueous media was assessed for the first time. The systematic study of the naphthalene adsorption by the kaolin/Fe3O4 composite, using the central composite design, revealed that an increase in solution pH, contact time, or composite dose improves the removal efficiency of naphthalene. Considering the desirability index of 1.00, the optimum conditions for the removal of naphthalene were found at a composite dose of 4.8 g L-1, contact time of 66 min, and solution pH 6.5 to achieve 97% removal efficiency from a solution containing 10 mg L-1 naphthalene. In comparison with the other clay-based composites, the equilibrium removal efficiency of naphthalene by the kaolin/Fe3O4 composite was significantly high. These results indicated that the kaolin/Fe3O4 composite is one of the most efficient adsorbents for the treatment of naphthalene-contaminated water using the adsorption process.
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页码：1991 / 2002
页数：12
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