Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20057
Title: Highly effective degradation of sodium dodecylbenzene sulphonate and synthetic greywater by Fenton-like reaction over zerovalent iron-based catalyst
Authors: Zhu, SN
Wang, C
Yip, ACK
Tsang, DCW 
Keywords: Anionic surfactants
Fenton-like oxidation
Greywater treatment
Zerovalent iron
Issue Date: 2015
Publisher: Selper Ltd
Source: Environmental technology, 2015, v. 36, no. 11, p. 1423-1432 How to cite?
Journal: Environmental technology 
Abstract: There is an increasing interest to recycle greywater for meeting non-portable water demand. However, linear alkylbenzene sulphonates (a form of anionic surfactants) that are commonly found in greywater are less biodegradable at moderate to high concentrations. A fenton-like system is a relatively economic advanced oxidation process that can potentially be used for surfactant degradation in greywater treatment. This study investigated the feasibility of zerovalent iron (ZVI)-mediated Fenton's oxidation of sodium dodecylbenzene sulphonate (SDBS) using Fe0/H2O2 and Fe2+/Fe0/H2O2 systems under a range of operating conditions. For the Fe0/H2O2 binary system, the initial pH value and Fe0 dosage played important roles in final degradation efficiency. For the Fe2+/Fe0/H2O2 ternary systems, a small amount of Fe2+ (0.5-1.7mM) contributed a synergistic effect to promote iron recycling and SDBS degradation. Approximately, 90% of SDBS mineralization efficiency was accomplished within 15min at a pH range from 3.0 to 6.5, using 18mM Fe0 and 15mM H2O2. However, the removal kinetics was rate-limited by Fe2+ dissolution from the ZVI surfaces. The Fenton-like process of the Fe2+/Fe0/H2O2 ternary system also presents a promising treatment method for synthetic greywater, in which 90% TOC removal was achieved within the first 10min; 78% COD and 91% BOD5 were achieved after 120min of reaction.
URI: http://hdl.handle.net/10397/20057
ISSN: 0959-3330
EISSN: 1479-487X
DOI: 10.1080/09593330.2014.992481
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