Synthesis of carboxyl-functionalized magnetic nanoparticles for adsorption of malachite green from water: Kinetics and thermodynamics studies

被引：28

作者：

Galangash, Mohsen Mohammadi ^{[1
]}

Montazeri, Mojgan Mohaghegh ^{[1
]}

Ghavidast, Atefeh ^{[1
,2
]}

Shirzad-Siboni, Mehdi ^{[3
]}

机构：

[1] Univ Guilan, Fac Nat Resources, Dept Environm Sci, Guilan 1144, Iran

[2] Univ Guilan, Fac Sci, Dept Chem, Rasht, Iran

[3] Guilan Univ Med Sci, Sch Hlth, Dept Environm Hlth Engn, Rasht, Iran

来源：

JOURNAL OF THE CHINESE CHEMICAL SOCIETY | 2018年 / 65卷 / 08期

关键词：

adsorption; carboxyl group; magnetic nanoparticles; malachite green; recycling; HEAVY-METAL IONS; AQUEOUS-SOLUTION; METHYLENE-BLUE; WASTE-WATER; CATIONIC DYES; AZO-DYE; ASSISTED REMOVAL; ALIZARIN RED; CONGO-RED; EQUILIBRIUM;

D O I：

10.1002/jccs.201700361

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Magnetic carboxyl-coated silica iron oxide nanoparticles (Fe3O4@SiO2-COOH NPs) were successfully synthesized, characterized, and then applied as a nano-adsorbent for removal of malachite green (MG) from aqueous solutions. According to the experimental results, about 97.5% of MG could be removed from aqueous solutions using an adsorbent amount of 0.5 g/L at pH=9 in 120min. The kinetics and equilibrium adsorptions is well-described by the pseudo-second-order kinetics and Langmuir model with the maximum absorption capacity of 263.16mg/g, respectively. Thermodynamic studies showed that the adsorption of the hazardous MG dye was spontaneous and endothermic with a random process.

引用

页码：940 / 950

页数：11

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