氮掺杂生物炭增强电吸附有机污染物  

Electrosorption enhancement of organic pollutants on nitrogen-doped biochar

作　　者：王虹莹 王冠龙 张秀芳 WANG Hongying;WANG Guanlong;ZHANG Xiufang(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2025年第1期49-53,共5页Journal of Dalian Polytechnic University

基　　金：辽宁省教育厅基本科研项目(LJKQZ2021116)。

摘　　要：电吸附因其环境友好被认为是一种有潜力的水处理技术,但其吸附能力和吸附效率仍有待提高。采用电泳沉积法制备了不同氮掺杂量的生物炭电极(Ti/N-CA-x-700)并将其用于电吸附去除磺胺甲噁唑(SMX)。结果表明,N的引入显著增大了原始生物炭的比表面积和孔径并提高了其电导率。在-1.5 V下7 h后Ti/N-CA-1G-700的SMX电吸附容量最佳,分别是无N掺杂的生物炭电极(Ti/CA)和无偏压的Ti/N-CA-1G-700的2.64倍和9.08倍。在-1.5 V下SMX最大吸附量为305.71 mg/g。制备的Ti/N-CA-1G-700显示出良好的稳定性,5次循环后的去除率保持在100%。Electrosorption is considered as a promising water treatment technology due to its environmental friendliness,but its adsorption capacity and efficiency still need improvement.In this study,biochar electrodes(Ti/N-CA-x-700)with different nitrogen doping levels prepared by electrophoretic deposition were used for the electrosorption removal of sulfamethoxazole(SMX).The results showed that the introduction of N significantly increased the specific surface area and pore size of the original biochar while enhancing its conductivity.At the voltage of-1.5 V,the SMX electrosorption capacity of Ti/N-CA-1G-700 was optmial after 7 h,which was 2.64 times and 9.08 times higher than that of nitrogen-free biochar electrode(Ti/CA)and Ti/N-CA-1G-700 without an applied voltage,respectively.The maximum electrosorption capacity for SMX was 305.71 mg/g at-1.5 V.The prepared Ti/N-CA-1G-700 showed excellent stability,maintaining a removal rate of 100%after five cycles.

关 键 词：生物炭 氮掺杂 电吸附 磺胺甲噁唑 

分 类 号：X703[环境科学与工程—环境工程]