Catalytic ozonation of dimethyl phthalate and chlorination disinfection by-product precursors over Ru/AC

• Published in: Journal of hazardous materials Vol. 166; no. 1; pp. 502 - 507
• Main Authors: Wang, Jianbing, Zhou, Yunrui, Zhu, Wanpeng, He, Xuwen
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.07.2009; Elsevier
• Subjects: Aluminum Oxide - chemistry; Applied sciences; Atmospheric pollution; Catalysis; Catalytic ozonation; Catalytic reactions; Chemical engineering; Chemistry; Crystallization, leaching, miscellaneous separations; Dimethyl phthalate; Disinfectants - chemistry; Disinfection by-product formation potential; Exact sciences and technology; General and physical chemistry; Halogenation; Ozone - chemistry; Phthalic Acids - chemistry; Plasticizers - chemistry; Pollution; Reactors; Ruthenium - chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Water Pollutants, Chemical - chemistry; Water Purification - methods; Catalytic ozonation; Disinfection by-product formation potential; Dimethyl phthalate; Drinking water treatment; Water treatment; Particle size; Catalytic reaction; Chlorination; Disinfection; Ozone; Secondary pollutant; Precursor; Transport process; Ozonization; Mineralization; Lixiviation; Air pollution; Total organic carbon; Aqueous solution; Catalyst
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2008.11.046

Catalytic ozonation of dimethyl phthalate (DMP) in aqueous solution (5 mg/L) under various reactions was performed to examine the effect of catalyst dosage, catalyst particle size, ozone dosage, and gas flow rate on the mineralization of DMP. The mineralization of DMP can be achieved via ozonation and the presence of Ru/AC could greatly accelerate the mineralization rate of DMP in ozonation process. In the continuous experiment of the Ru/AC catalyzed ozonation of DMP, total organic carbon (TOC) removals were kept stable around 75% during 42 h reaction. No leaching of ruthenium was observed in the treated water samples. The treatment of natural water using Ru/AC + O 3, Ru/AC + O 2 and ozonation alone was studied. In the Ru/AC + O 3 process, TOC removals, the reductions of the haloacetic acid formation potentials (HAAFPs), and the reductions of the trihalomethane formation potentials (THMFPs) of 11 water samples were 22–44%, 39–61% and 50–65%, respectively. Ru/AC + O 3 process was much more effective than ozonation alone for TOC removal and the reduction of disinfection by-product formation potential (DBPFP) in the treatment of natural water. It is a promising water treatment technology.