{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,8]],"date-time":"2026-06-08T22:00:11Z","timestamp":1780956011804,"version":"3.54.1"},"reference-count":32,"publisher":"IWA Publishing","issue":"2","content-domain":{"domain":["iwaponline.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2016,7,20]]},"abstract":"<jats:p>The purpose of this study is to compare the efficiency of ozonation and the hydrogen peroxide\u2013ozone process for the removal of cyanide from coking wastewater. The most efficient oxidation process is combined with coagulation\u2013flocculation\u2013decantation and lime\u2013soda ash softening pretreatments. The oxidation in aqueous solution and industrial wastewater (at pH 9.5\u201312.3) by O3 was carried out using a range of concentration of consumed O3 from 10 to 290 mg\/L. A molar ratio of H2O2\/O3 from 0.1 to 5.2 with different concentrations of O3 constants was used for the H2O2-O3 process. The maximum cyanide removal obtained in coking wastewater was 90% using a mass ratio of O3\/CN\u2013 of 9.5. Using lower concentrations of O3, cyanide is not removed and can even be generated due to the presence of other cyanide precursor organic micropollutants in the industrial matrix. The concentration of O3 is reduced to half for the same cyanide removal efficiency if the pretreatments are applied to reduce the carbonate and bicarbonate ions. The cyanide removal efficiency in coking wastewater is not improved if the O3 is combined with the H2O2. However, the preliminary cyanide removal treatment in aqueous solution showed an increase in the cyanide removal efficiency for the H2O2-O3 process.<\/jats:p>","DOI":"10.2166\/wst.2016.227","type":"journal-article","created":{"date-parts":[[2016,5,14]],"date-time":"2016-05-14T04:04:34Z","timestamp":1463198674000},"page":"482-490","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":13,"title":["Limitations of the removal of cyanide from coking wastewater by ozonation and by the hydrogen peroxide-ozone process"],"prefix":"10.2166","volume":"74","author":[{"given":"N.","family":"Pueyo","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, C\/Mar\u00eda de Luna 3, Zaragoza 50018, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N.","family":"Miguel","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, C\/Mar\u00eda de Luna 3, Zaragoza 50018, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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