Zero-valent iron-activated persulfate oxidation of a commercial alkyl phenol polyethoxylate

Environmental Technology
Kubra TemizIdil Arslan-Alaton

Abstract

Aqueous Triton X-45 (TX-45; 20 mg/L; original total organic carbon (TOC) = 14 mg/L), a representative, commercially important alkylphenol polyethoxylate, was subjected to persulfate (PS) oxidation activated with zero-valent iron (ZVI) nanoparticles. After optimization of the ZVI/PS treatment combination (1 g/L ZVI; 2.5 mM PS at pH5) in terms of pH (3-9), ZVI (0.5-5 g/L) and PS (0.5-5.0 mM) concentrations, TX-45 could be efficiently (>90%) degraded within short treatment periods (<60 min) accompanied with significant (>40%) TOC removals. The degree of PS consumption and Fe release was also followed during the experiments and a positive correlation existed between enhanced TX-45 removals and ZVI-activated PS consumption rates accompanied with a parallel Fe release. Acute toxicity tests were conducted using two different bioassays to examine the toxicological safety of the ZVI/PS oxidation system. Acute toxicity profiles significantly decreased from an original value of 66% relative inhibition to 21% and from 16% relative inhibition to non-toxic values according to Vibrio fischeri and Pseudokirchneriella subcapitata bioassays, respectively. The photobacterium V. fischeri appeared to be more sensitive to TX-45 and its degradation p...Continue Reading

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Citations

Dec 14, 2017·Environmental Technology·Zhonghua WangYang Liu
Nov 17, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·I Arslan-AlatonT Ozturk
Jun 17, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Yanjiao GaoTiehong Song
Nov 25, 2018·International Journal of Environmental Research and Public Health·Zacharias Frontistis

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Methods Mentioned

BETA
atomic absorption spectrometry

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