Photocatalytic treatment of wastewater contaminated with organic waste and copper ions from the semiconductor industry

Shuai Wen Zou, Choon Wai How, J. Paul Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Simultaneous decontamination of organic compounds and copper ions in the wastewater discharged from semiconductor manufacturing facilities by a UV/TiO2 photocatalytic degradation was investigated in this study. Two organic compounds of ethyl lactate and phenol and copper ions were studied due to their common applications in various wafer fabrication processes and higher toxicities. The optimal TiO2 dosage and initial pH for the photocatalytic oxidation of ethyl lactate and phenol were 0.1 g/L and 3.0-4.0. Photocatalytic degradation under these optimal conditions was able to simultaneously mineralize those solvents and remove copper(II) in the synthetic wastewater. Under anoxic condition, oxygen inhibited copper reduction and copper(II) ions were removed through precipitation. Under anaerobic conditions, the removal rate of copper(II) ions and the rate of reduction of the organic solvents content were lower than that in the aerobic condition.

Original languageEnglish
Pages (from-to)6566-6571
Number of pages6
JournalIndustrial & Engineering Chemistry Research
Volume46
Issue number20
DOIs
StatePublished - 26 Sep 2007
Externally publishedYes

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