Removal of Congo red and Brilliant green dyes from aqueous solution using flower shaped ZnO nanoparticles

被引：132

作者：

Kataria, Navish ^{[1
]}

Garg, V. K. ^{[1
,2
]}

机构：

[1] Guru Jambheshwar Univ Sci & Technol, Dept Environm Sci & Engn, Hisar 125001, Haryana, India

[2] Cent Univ Punjab, Ctr Environm Sci & Technol, Bathinda 151001, India

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2017年 / 5卷 / 06期

关键词：

Flower shaped ZnO nanoparticles; Congo red; Brilliant green; Adsorption isotherms; Adsorption capacity; Kinetics; ARTIFICIAL NEURAL-NETWORK; ACTIVATED CARBON; INDUSTRY WASTE; ADSORPTION; OPTIMIZATION; EQUILIBRIUM; DEGRADATION; KINETICS; DESIGN;

D O I：

10.1016/j.jece.2017.10.035

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This work reports preparation and characterization of ZnO nanoparticles prepared by low temperature hydrothermal methods and their application for anionic dye (Congo red) and cationic dye (Brilliant green) removal from aqueous medium. The adsorption capacity of ZnO nanoparticles for Congo red dye and Brilliant green dye was up to 71.4 and 238 mg/g, respectively under selected process conditions. Dye adsorption behaviour has been explained applying different isotherms. Freundlich isotherm model best fitted to the dye removal data. Adsorption kinetics of both dyes is well explained by pseudo-second order model. Physical adsorption has been investigated using thermodynamic parameters viz., Gibb's free energy (Delta G degrees), enthalpy (Delta H degrees) and entropy (Delta S degrees). The reusability of ZnO nanoparticles was examined upto three cycles.

引用

页码：5420 / 5428

页数：9

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