Removal of Cr(VI) from aqueous solution by rice husk derived magnetic sorbents

被引：23

作者：

Fan, Yuan ^{[1
]}

Yang, Ruifeng ^{[1
]}

Lei, Zhimin ^{[1
]}

Liu, Na ^{[1
]}

Lv, Jialiang ^{[1
]}

Zhai, Shangru ^{[1
]}

Zhai, Bin ^{[1
]}

Wang, Lei ^{[1
]}

机构：

[1] Dalian Polytech Univ, Fac Light Ind & Chem Engn, Dalian 116034, Peoples R China

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2016年 / 33卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Bio-sorbent; Magnetic; Cr(VI) Removal; Adsorption; Agricultural Waste; WALLED CARBON NANOTUBES; BAGASSE FLY-ASH; WASTE-WATER; POROUS CARBON; HEXAVALENT CHROMIUM; TITANIUM-DIOXIDE; SUGAR-INDUSTRY; TOXIC METAL; BOTTOM ASH; ADSORPTION;

D O I：

10.1007/s11814-015-0248-y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel magnetic porous sorbent obtained from agricultural waste rice husk was successfully synthesized through a simple carbon-thermal method. The sorbent was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometer, N2 sorption analysis, and X-ray photoelectron spectroscopy. The removal efficiency of the sorbent for Cr(VI) was also investigated. Chromium adsorption was fitted by the pseudo-second-order and Langmuir models. The maximum chromium adsorption capacity, Brunauer-Emmett-Teller surface area, and average Barrett-Joyner-Halenda pore size of the magnetic sorbent were 157. 7mg center dot g(-1), 134. 1m(2)center dot g(-1), and 4. 99 nm, respectively. The saturated magnetization of the novel adsorbent was 77. 8 emu center dot g(-1), indicating that the material can facilitate separation and recovery from aqueous systems. The removal mechanisms of Cr(VI) were also discussed. The result illustrates that rice husk-derived magnetic carbonaceous materials are a potential adsorbent for Cr(VI) pollution treatment and provide a suitable method for the effective conversion of biomass waste, which may solve the problem of waste disposal and widen the applications of the materials.

引用

页码：1416 / 1424

页数：9

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