Sulfamethoxazole removal from water by electro-activation of peroxymonosulfate using coal-based carbon membrane
An electrochemical enhanced coal-based carbon membrane(CM)peroxymonosulfate activation(E-CM-PMS)system was constructed for the removal of sulfamethoxazole(SMX)from water.The morphology and structure of CM were characterized.The effects of operating conditions on the removal efficiency of SMX were systematically investigated.The SMX degradation mechanism and the applicability of E-CM-PMS for SMX removal from different water matrixes were also investigated.Results show that the PMS activation efficiency of CM is significantly enhanced under the applied voltage of 1.5 V,thus improving its SMX removal efficiency.When the PMS dosage is 0.2 g/L,the flow rate is 0.4 mL/min,and the pH value is 6.52,the SMX removal rate of the system is up to 97％,and it also exhibits good applicability for SMX removal in different water matrixes.The mechanism analysis reveals that the efficient degradation of SMX during the treatment is owing to the synergistic effect of non-free radical(direct electron transfer and 1O2)and free radical(·OH,SO4·-)mechanism.
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