Removal of As(III) from Aqueous Solution Using Fe3O4 Nanoparticles: Process Modeling and Optimization Using Statistical Design

被引:38
|
作者
Sahu, Uttam Kumar [1 ]
Sahu, Manoj Kumar [1 ]
Mahapatra, Siba Sankar [2 ]
Patel, Raj Kishore [1 ]
机构
[1] Natl Inst Technol, Dept Chem, Rourkela 769008, Odisha, India
[2] Natl Inst Technol, Dept Mech Engn, Rourkela 769008, Odisha, India
来源
WATER AIR AND SOIL POLLUTION | 2017年 / 228卷 / 01期
关键词
As(III) removal; Microemulsion; Fe3O4; nanoparticles; Response surface methodology; Box-Behnken design; RESPONSE-SURFACE METHODOLOGY; ARSENIC III REMOVAL; HYBRID MATERIAL; WATER; ADSORPTION;
D O I
10.1007/s11270-016-3224-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, Extran (biodegradable surfactant) was used for the preparation of Fe3O4 nanoparticles by microemulsion process to improve removal efficiency of As(III) from aqueous solution. Fe3O4 nanoparticles were characterized by XRD, FTIR, FESEM, TEM, HRTEM, and VSM instrumental techniques. The effect of different parameters such as adsorbent dose, initial As(III) concentration, and solution pH were studied by response surface methodology (RSM) based on Box-Behnken design (BBD). The optimized condition for adsorption of As(III) from aqueous solution was obtained as adsorbent dose of 0.70 mg/g, solution pH of 7.7, and initial As(III) concentration of 33.32 mg/L. In this optimum condition, about 90.5% of As(III) was removed from the aqueous solution. Isotherm studies have been done at optimal condition, and it was observed that the Langmuir isotherm models were fitted well with experimental data having a high correlation coefficient of 0.993. From the Langmuir isotherm data, the maximum adsorption capacity of Fe3O4 nanoparticles was found to be 7.18 mg/g at pH 7.7 in room temperature. This study revealed that Fe3O4 nanoparticles can be used as an efficient, eco-friendly, and effective material for the adsorptive removal of As(III) from aqueous system.
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页数:15
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