Degradation of 4-Chloro-3,5-Dimethylphenol by a Heterogeneous Fenton-Like Reaction Using Nanoscale Zero-Valent Iron Catalysts

Overview

Journal Environ Eng Sci

Date 2013 Jun 20

PMID 23781127

Citations 4

Authors

Lejin Xu

Jianlong Wang

Affiliations

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Abstract

Degradation of 4-chloro-3,5-dimethylphenol (PCMX) by a heterogeneous Fenton-like process using nanoparticulate zero-valent iron (nZVI) and hydrogen peroxide (HO) at pH 6.3 was investigated. Interactive effects of three factors-initial PCMX concentration, nZVI dosage, and HO concentration-were investigated using the response surface method based on the Box-Behnken design. Experimental results showed that complete decomposition of PCMX and 65% of total organic carbon removal were observed after 30 min of reaction at neutral pH under recommended reaction conditions: nZVI, 1.0 g/L; HO, 18 mM; and initial PCMX concentration, 0.15 g/L. Based on the effects of scavengers -butanol and KI, removal of PCMX was mainly attributed to the attack of •OH, especially the surface-bonded •OH. A possible degradation pathway of PCMX was proposed.

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