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Experiments on the mineralization of oxytetracycline in aqueous solutions using UV/H 2 O 2 system were carried out. The mineralization process was monitored and measured as a function of total organic carbon (TOC) removal. Effect of five different water matrices on the mineralization efficiency, kinetics and the electrical energy per order was analyzed and reported. The present results showed that the percentage TOC removal, the rate constants and the electrical energy per order depend on the concentration of organics, inorganics and other impurities present in the water matrices. The value of electrical energy per order (EE/O) for the OTC mineralization is higher for more complex water matrices. Editorial responsibility: Binbin Huang.

Alkanolamines such as MEA, DEA, MDEA and DIPA in aqueous solutions is frequently used for scrubbing carbon dioxide from natural gas. High quantity of alkanolamine appears in the wastewater during cleaning and maintenance as well as shutdown of the absorption and desorption columns. The alkanolamines waste is toxic to the environment and this wastewater cannot be treated in the conventional wastewater treatment. Advanced Oxidation Process (AOP) named UV/H 2 O 2 is introduced to solve this problem. A laboratory set up of degradation MDEA waste using UV/H 2 O 2 was conducted and the degradation mechanism has been studied. Glycine, oxalic acid, acetic acid, nitrate ion, nitrite ion and ammonium ion are identified as degradation intermediate product.