Photocatalytic Reduction of Hexavalent Chromium over ZnO Nanorods Immobilized on Kaolin

被引：152

作者：

Shirzad-Siboni, Mehdi ^{[1
]}

Farrokhi, Mehrdad ^{[1
]}

Soltani, Reza Darvishi Cheshmeh ^{[2
]}

Khataee, Alireza ^{[3
]}

Tajassosi, Sama ^{[1
]}

机构：

[1] Guilan Univ Med Sci, Sch Hlth, Dept Environm Hlth Engn, Rasht 4144666949, Iran

[2] Arak Univ Med Sci, Sch Publ Hlth, Dept Environm Hlth Engn, Arak 3819693345, Iran

[3] Univ Tabriz, Fac Chem, Dept Appl Chem, Res Lab Adv Water & Wastewater Treatment Proc, Tabriz 5166614766, Iran

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2014年 / 53卷 / 03期

关键词：

AQUEOUS-SOLUTION; TITANIUM-DIOXIDE; UV-IRRADIATION; ORGANIC-DYES; WASTE-WATER; HUMIC-ACID; CR(VI); REMOVAL; TIO2; DEGRADATION;

D O I：

10.1021/ie4032583

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The photocatalytic reduction of hexavalent chromium (Cr(VI)) using ZnO nanorods immobilized on kaolin clay was studied. Scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) analysis demonstrated favorable immobilization of ZnO nanorods onto the kaolin. The efficiency of the UV/ZnO/kaolin process for reduction of Cr(VI) was about 88.0%, which was more effective than the UV/ZnO process (43.7%). The photocatalytic reduction of Cr(VI) was increased from 35.7 to 97.1%, with increasing photocatalyst dosage from 0.25 to 3 g/L, respectively. The reaction rate constant (k(obs)) was decreased from 0.0769 to 0.0072 l/min, and the value of electrical energy per order (EEo) was increased from 62.4 to 666.7 (kW.h/m(3)) with increasing initial Cr(VI) concentration from 10 to 50 mg/L, respectively. The photocatalytic reduction of Cr(VI) was increased from 88.3 to 98.5% in the presence of citric acid, while the presence of phenol, ethylenediaminetetraacetic acid and oxalic acid resulted in decreasing the photocatalytic reduction of Cr(VI) to 70.2, 53.2, and 36.4%, respectively.

引用

页码：1079 / 1087

页数：9

共 49 条

[1] Reductive removal of Cr(VI) by starch-stabilized Fe0 nanoparticles in aqueous solution [J].