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Abstract
To investigate the effects of gamma irradiation on coking wastewater treatment, a preliminary study using different doses of gamma radiation (1, 3, 5 and 7 kGy) on coking wastewater samples was carried out. The pH parameter, chemical oxygen demand (COD), total suspended solids (TSS) and total organic carbon (TOC) of the coking wastewater samples were determined before and after irradiation. Results showed that gamma irradiation was effective for removing organic contaminants and suspended solids particles. The values of COD, TSS, TOC and pH decreased with the increasing of absorbed doses, after gamma irradiation. The removal rate of TSS and TOC is 81.43 and 95.22% at the absorbed doses of 7 kGy, respectively. It indicates that gamma irradiation offers an alternative method for coking wastewater treatment that may have extra benefit of improving the water quality.
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