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Oxidative treatment of aqueous monochlorobenzene with thermally-activated persulfate

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Abstract

The oxidation of aqueous monochlorobenzene (MCB) solutions using thermally-activated persulfate has been investigated. The influence of reaction temperature on the kinetics of MCB oxidation was examined, and the Arrenhius Equation rate constants at 20°C, 30°C, 40°C, 50°C, and 60°C for MCB oxidation performance were calculated as 0, 0.001, 0.002, 0.015, 0.057 min−1, which indicates that elevated temperature accelerated the rate. The most efficient molar ratio of persulfate/MCB for MCB oxidation was determined to be 200 to 1 and an increase in the rate constants suggests that the oxidation process proceeded more rapidly with increasing persulfate/MCB molar ratios. In addition, the reactivity of persulfate in contaminated water is partly influenced by the presence of background ions such as Cl−, HCO −3 , SO 2−4 , and NO −3 . Importantly, a scavenging effect in rate constant was observed for both Cl− and CO 2−3 but not for other ions. The effective thermally activated persulfate oxidation of MCB in groundwater from a real contaminated site was achieved using both elevated reaction temperature and increased persulfate/MCB molar ratio.

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  1. State Environmental Protection Engineering Center for Urban Soil Contamination Control and Remediation, Shanghai Academy of Environmental Science, Shanghai, 200233, China

    Qishi Luo

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  1. Qishi Luo
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Luo, Q. Oxidative treatment of aqueous monochlorobenzene with thermally-activated persulfate. Front. Environ. Sci. Eng. 8, 188–194 (2014). https://doi.org/10.1007/s11783-013-0544-x

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  • DOI: https://doi.org/10.1007/s11783-013-0544-x

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