Synthesis and intensive treatment of Fe2O3 blended ozone catalyst for reverse osmosis concentrated water in coal chemical industry
Using iron hydroxide,activated alumina and pseudo-bauxite powder as raw materials and dilute acid as adhesive solvent,four kinds of metallic oxide blended ozone catalysts with differ-ent iron oxide contents were successfully prepared by means of mixing kneading,extrusion molding and high-temperature roasting in one step,and the catalytic oxidative degradation of phenol as well as coal chemical wastewater were also investigated in detail.The results show that:(1)Under the experimental evaluation conditions,the catalyst with 7.5％Fe2O3 mass fraction shows the best catalytic oxidative degradation performance.When the TOC of flooding waters were controlled at 87.5 mg/L,the degradation efficiency of phenol is 71.5％,and that of actual coal chemical wastewater is 53.4％.(2)Based on the catalyst with the optimal Fe2O3 content,the degradation efficiency of coal chemical wastewater was further increased to 61.5％by impregnating copper ox-ide active components.(3)For coal chemical wastewater,by comparing the degradation efficiency of oxidation systems with different metallic oxide ozone catalysts in continuous operation of fixed beds,the degradation efficiency of self-made catalysts was better than that of commercially availa-ble ozone catalysts with the same type,showing a good industrial application prospect.
Ozone catalystMetallic oxideCoal chemical wastewaterAdvanced oxidation
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