工程科学与技术2024，Vol.56Issue(4)：24-34,11.DOI:10.15961/j.jsuese.202300498
基于蓝藻生物炭粒子电极的3维电化学系统对磺胺甲恶唑的降解
Degradation of Sulfamethoxazole by Three-dimensional Electrochemical System Using Cyanobacteria-derived Biochar as Particle Electrodes
摘要
Abstract
Following the concept of"treating waste using waste",this study uses cyanobacteria in the Tai Lake after mechanical salvage as raw materials to prepare environmentally friendly cyanobacteria-based biochar through high temperature,oxygen-limited pyrolysis,and acid/alkali treatment.The obtained biochar is then utilized as particle electrodes in a three-dimensional electrochemical system(3DES)to remove the typical antibiotic sulfamethoxazole(SMX)from water.After pyrolysis and acid/alkali treatment,the biochar exhibits a larger specific surface area and a more abundant pore structure,which enhances the enrichment of SMX on the surface of particle electrodes.The original iron and nitrogen ele-ments in cyanobacteria form a doping structure in the resulting biochar,significantly enhancing the generation of reactive oxygen species and im-proving the removal and mineralization efficiencies of SMX.The optimized biochar is prepared at a pyrolysis temperature of 700 ℃ and sub-sequently modified using alkali.The optimized operational conditions of 3DES involve a current of 600 mA,a pH of 6,a particle electrode dosage of 1.00 g/L,a water flow rate of 300 mL/min,and an electrolyte Na2SO4 concentration of 50 mm.The removal efficiency for SMX can exceed 96％within 120 min,and the total organic carbon(TOC)removal efficiency can reach 94％after 6 h.Mechanism studies indicated that indirect oxidation,accounting for 84.32％of SMX degradation,is more significant than direct oxidation,which accounts for 15.68％;both HO·and SO4·-are detected in the system,yet neither 1O2 nor O2·-is detected;compared to SO4·-,HO in indirect oxidation,accounting for 87.31％,plays a dom-inant role in the 3DES.After six cycles of operation,the degradation efficiency of 3DES for SMX removal remains above 85％.This work provides technical support and a theoretical basis for applying 3DES based on cyanobacterial biochar particle electrodes in water treatment.关键词
蓝藻基粒子电极/3维电化学系统/抗生素/降解/生物炭Key words
cyanobacteria-derived particle electrode/3-dimensional electrochemical system/antibiotic/degradation/biochar分类
资源环境引用本文复制引用
张晴,赵丽娜,蒋欣,边博,杨维本,赵俭波,杨朕..基于蓝藻生物炭粒子电极的3维电化学系统对磺胺甲恶唑的降解[J].工程科学与技术,2024,56(4):24-34,11.基金项目
国家自然科学基金项目(51978341) （51978341）
新疆生产建设兵团南疆重点研发项目(2022DB025) （2022DB025）
江苏省生态环境科研项目(2022003) （2022003）
江苏省"青蓝工程"优秀青年骨干教师项目 （）
教育部产学协同育人项目(220602905023838) （220602905023838）
