Abstract
Environmental endocrine disruptors,represented by bisphenol A(BPA),have been widely detected in the environment,bringing potential health risks to human beings.Nitrogen-containing biocarbon catalyst can activate peroxymonosulfate(PMS)to degrade BPA in water,but its active sites remain opaque.Herein,in this work,nitrogen-containing biochar,i.e.,C-Nedge,enriched with graphitic-N defects at the edges was prepared by one-pot co-pyrolysis of chitosan and potassium carbonate.The results showed that the C-Nedge/PMS system can effectively degrade 98％of BPA(50 mg/L).The electron transfer based non-radical oxidation mechanism was responsible for BPA degradation.Edge graphitic-N doping endows biochar with strong electron transfer ability.The catalyst had good recovery and reuse performance.This catalytic ox-idation was also feasible for other refractory pollutants removal and worked well for treating practi-cal wastewater.This work may provide valuable information in unraveling the N doping configuration-activity relationship during activating PMS by biochar.
维普
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