{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,24]],"date-time":"2025-09-24T10:33:52Z","timestamp":1758710032452},"reference-count":0,"publisher":"IWA Publishing","issue":"12","content-domain":{"domain":["iwaponline.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2007,6,1]]},"abstract":"<jats:p>Pretreatment of an acid dyebath effluent bearing a new generation chromium complex azo dyestuff (Co=350\u2009mg\/L) with Fenton's reagent was investigated. Preliminary optimisation (baseline) experiments were conducted to determine the Fe2\u2009+\u2009, H2O2 concentrations and pH required to the highest possible COD and colour removals. Kinetic studies were carried out at varying temperatures (20\u2009\u00b0C\u2009&amp;lt;\u2009T&amp;lt;70\u2009\u00b0C) to establish a relationship between COD abatement and H2O2 consumption. The activation energy found for catalytic H2O2 decomposition (Ea=9.8\u2009kJ\/mol) appeared to be significantly less than that of fermentative (Ea=23\u2009kJ\/mol) and of thermal (Ea=76\u2009kJ\/mol) H2O2 decomposition, implying that H2O2 decomposition during the Fenton's reaction occurs more spontaneously. The experimental studies indicated that approximately 30% COD and complete colour removal could be achieved under optimised Fenton pretreatment conditions (Fe2\u2009+\u2009=2\u2009mM; H2O2=30\u2009mM; pH\u2009=\u20093; at T\u2009=\u200960\u2009\u00b0C). Long-term activated sludge experiments revealed that although the raw and pretreated acid dyebath effluent contained practically the same amount of \u201creadily biodegradable\u201d COD (inert COD fraction \u226410%), biodegradation of the chemically pretreated acid dye effluent proceeded appreciably faster than that of the untreated acid dyebath effluent.<\/jats:p>","DOI":"10.2166\/wst.2007.388","type":"journal-article","created":{"date-parts":[[2007,6,18]],"date-time":"2007-06-18T09:01:15Z","timestamp":1182157275000},"page":"107-112","update-policy":"http:\/\/dx.doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":3,"title":["Effect of Fenton's treatment on the biodegradability of chromium-complex azo dyes"],"prefix":"10.2166","volume":"55","author":[{"given":"I.","family":"Arslan-Alaton","sequence":"first","affiliation":[{"name":"Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"Kabda\u015fl\u0131","sequence":"first","affiliation":[{"name":"Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Teksoy","sequence":"first","affiliation":[{"name":"Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"945","container-title":["Water Science and Technology"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/iwaponline.com\/wst\/article-pdf\/55\/12\/107\/478407\/107.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/iwaponline.com\/wst\/article-pdf\/55\/12\/107\/478407\/107.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,3,27]],"date-time":"2020-03-27T22:21:33Z","timestamp":1585347693000},"score":1,"resource":{"primary":{"URL":"https:\/\/iwaponline.com\/wst\/article\/55\/12\/107\/14259\/Effect-of-Fentons-treatment-on-the"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,6,1]]},"references-count":0,"journal-issue":{"issue":"12","published-print":{"date-parts":[[2007,6,1]]}},"URL":"https:\/\/doi.org\/10.2166\/wst.2007.388","relation":{},"ISSN":["0273-1223","1996-9732"],"issn-type":[{"value":"0273-1223","type":"print"},{"value":"1996-9732","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2007,6,1]]},"published":{"date-parts":[[2007,6,1]]}}}