Simultaneous Removal of Methylene Blue and Hexavalent Chromium From Water Using TiO2/Fe(III)/H2O2/Sunlight

被引：36

作者：

Djellabi, Ridha ^{[1
]}

Ghorab, Mohamed Fouzi ^{[1
]}

Sehili, Tahar ^{[2
]}

机构：

[1] Badji Mokhtar Univ, Chem Dept, Lab Water Treatment & Valorizat Ind Wastes, Fac Sci, Annaba, Algeria

[2] Constantine1 Univ, Fac Exact Sci, Lab Environm Sci & Technol, Chem Dept, Constantine, Algeria

来源：

CLEAN-SOIL AIR WATER | 2017年 / 45卷 / 06期

关键词：

Heavy metals; Iron cycle; Organic dyes; Photocatalysis; Sunlight; PHOTOCATALYTIC REDUCTION; AQUEOUS-SOLUTION; TANNERY WASTEWATERS; TITANIUM-DIOXIDE; OXIDATION; CR(VI); FENTON; IONS; DEGRADATION; CATALYST;

D O I：

10.1002/clen.201500379

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The objective of the present work was the simultaneous removal of methylene blue (MB) and hexavalent chromium from water using the combined system TiO2/Fe(III)/solar. The comparison between the three processes, i.e., iron cycle (Fe(III)/solar), photocatalytic reactions (TiO2/solar), and the combined system (TiO2/Fe(III)/solar) for single and simultaneous removal cases was investigated. The results show that only the TiO2/ Fe(III)/solar system ensures a complete simultaneous removal. A total simultaneous removal of Cr(VI) and MB at a concentration of 30ppm for each substrate was achieved under natural sunlight within 5 h by the use of 0.16 g/L of TiO2 and 40ppm of Fe(III). The effects of concentration ratio of substances, solution pH and the presence of H2O2 in the combined system were investigated. Finally, based on the obtained results, a removal pathway of both pollutants by TiO2/Fe(III)/H2O2/solar system was proposed. This fast synergistic combined system is a significant option for both oxidation and reduction reactions.

引用

页数：7

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