氮掺杂污泥生物碳催化过硫酸盐氧化降解双酚A性能研究  

Study on Catalytic Performance of Nitrogen-Doped Sludge Biochar for Bisphenol A Degradation by Persulfate

作　　者：王奥达 张玉洁 徐彤 安艳茹 陈丽萍[1] 辛旺 WANG Aoda;ZHANG Yujie;XU Tong;AN Yanru;CHEN Liping;XIN Wang(Colledge of Chemistry and Environmental Science,Inner Mongolia Normal University;Technical Research Centre for the Inner Mongolia of domestic sewage:Huhhot 010022,China)

机构地区：[1]内蒙古师范大学化学与环境科学学院,内蒙古呼和浩特010022 [2]内蒙古自治区生活污水资源化利用工程技术研究中心,内蒙古呼和浩特010022

出　　处：《水处理技术》2025年第3期102-107,112,共7页Technology of Water Treatment

基　　金：国家自然科学基金(52260007);中央引导地方科技发展资金(2023ZY0034);内蒙古自治区科技计划(2023YFHH0124)。

摘　　要：碳材料作为一种新型的无金属、无二次污染的水处理高级氧化催化剂受到了广泛的关注。以污水处理厂剩余污泥和高分子絮凝剂(GF)为原料,通过高温热解制备得到氮掺杂污泥生物碳(NSC)。研究表明,NSC在催化过氧单硫酸盐(PMS)氧化降解双酚A(BPA)方面能够表现出优异的性能。在900℃下,1%掺杂比的NSC具有良好的吸附性和催化活性。在20 min内,催化剂NSC活化PMS降解BPA的去除率可以达到90%以上。通过表征,经GF掺杂后NSC具有优异的比表面积(SSA)和更高的氮含量,这为活化PMS提供了有利条件。此外,通过不同种类淬灭剂的淬灭实验和电子自旋共振(EPR)检测,亦证实在催化剂NSC表面PMS通过电子转移和单线态氧(1O2)来促进BPA降解。并且,此降解方式为整个催化降解反应的主要途径。同时,利用GF掺杂获得的NSC具有催化活性高、来源广、绿色环保和制备简单等特点。本研究为NSC用于过硫酸盐高级氧化技术氧化降解持久性有机污染物提供参考。As a new type of non-metal and non-secondary pollution advanced oxidation catalyst for water treatment,carbon materials have received extensive attention.Nitrogen-doped sludge biochar(NSC)was prepared from sewage treatment sludge and polymeric flocculant(GF)by pyrolysis at high temperature.NSC showed excellent catalytic performance in the degradation of bisphenol A(BPA)by peroxymonosulfate(PMS)activation.The NSC catalyst prepared at 900℃has good adsorption and catalytic activity.The degradation of BPA by PMS catalyzed by NSC could reach over 90%in 20 minutes.NSC has excellent specific surface area(SSA)and higher nitrogen content,which provides favorable conditions for activation of PMS.In addition,quenching experiments and electron paramagnetic resonance(EPR)detection also confirmed that PMS promoted the degradation of BPA through the generation of singlet oxygen(1O2),which produced by electron transfer on the surface of catalyst.This is the necessary process during the whole catalytic degradation.Meanwhile,NSCs possess the characteristics of high catalytic activity,rich source,environmentally friendly and simple preparation.This study provides the reference for the activation of PMS through nitrogen-doped sludge biochar utilizing advanced oxidation technology for the removal of persistent organic pollutants(POPs).

关 键 词：过硫酸盐氧化 污泥生物碳 双酚A 单线态氧 

分 类 号：X799.3[环境科学与工程—环境工程]