摘要
以废菌棒(MS)和赤泥(RM)为原料,经过煅烧得到粉末状废菌棒赤泥生物炭(MSRMBC).采用悬浮滴定CaCl_(2)法以海藻酸钠(SA)为骨架的凝胶对MSRMBC进行包埋制得气凝胶粒子电极(MSRMBC@SA),并利用扫描电子显微镜(SEM)、能量色散谱(EDS)、傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、氮气吸附-脱附实验和循环伏安曲线(CV)对其进行表征分析.利用MSRMBC@SA构建三维电芬顿体系(3D-EFMSRMBC@SA),以卡马西平(CBZ)为模型化合物,考察了MSRMBC@SA投加量、电压、曝气量和pH值对MSRMBC@SA电催化性能的影响,最佳降解条件下CBZ(10 mg/L)的降解率为86.05%.因MSRMBC@SA具有良好的pH值调节能力,故体系受pH值影响较小.自由基猝灭、电子自旋共振(ESR)及X射线光电子能谱(XPS)表征结果表明,·OH为主要活性物种,MSRMBC@SA在CBZ降解过程中起到了关键的催化作用.研究发现,MSRMBC@SA稳定性较好,且3D-EF-MSRMBC@SA较2D-EF及3D-EF-MSRMBC具有更低的能耗和更佳的降解效果.MSRMBC@SA可有效降低CBZ溶液的生物毒性,对实际CBZ抗生素废水降解具有良好的应用前景.
Waste bacteria stick(MS)and red mud(RM)were calcined to obtain powdered waste bacteria stick red mud biochar(MSRMBC).The aerogel particle electrode(MSRMBC@SA)was prepared by embedding MSRMBC with sodium alginate(SA)as the skeleton by suspension titration CaCl_(2) method.The electrode was characterized by scanning electron microscope(SEM),energy dispersive spectrom(EDS),fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),N2 adsorption-desorption(BET)and cyclic voltammetric curve(CV).The threedimensional electrofenton system(3D-EF-MSRMBC@SA)was constructed by MSRMBC@SA.Using carbamazepine(CBZ)as the model compound,the effects of MSRMBC@SA dosage,voltage,aeration rate and pH on the electrocatalytic performance of MSRMBC@SA were investigated.Under the optimal degradation conditions,the degradation rate of CBZ(10 mg/L)was 86.05%.Because MSRMBC@SA has good pH adjustment ability,the system is less affected by pH value.Free radical quenching,electron spin resonance(ESR)and X-ray photoelectron spectroscopy(XPS)characterization showed that·OH was the main active species,and MSRMBC@SA played a key catalytic role in the degradation of CBZ.Further studies show that MSRMBC@SA has good stability,and 3D-EFMSRMBC@SA has lower energy consumption and better degradation effect than 2D-EF and 3D-EF-MSRMBC.MSRMBC@SA can effectively reduce the biological toxicity of CBZ solution,and has a good application prospect for the actual degradation of CBZ antibiotic wastewater.
作者
李赟
李红艳
张峰
肖子君
王芳
崔佳丽
杨群
LI Yun;LI Hongyan;ZHANG Feng;XIAO Zijun;WANG Fang;CUI Jiali;YANG Qun(Shanxi Municipal Engineering Graduate Education Innovation Center,College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China;Department of Architecture and Civil Engineering,Lüliang University,Lüliang 033001,China;State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China;Research Center for Edible Fungi,Biological Institute of Shanxi Province,Taiyuan 030006,China;Shanxi Key Laboratory of Edible Fungi for Loess Plateau,Taigu 030801,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2024年第10期57-68,共12页
Chemical Journal of Chinese Universities
基金
吕梁市引进高层次科技人才重点研发项目(批准号:2021RC-1-22)
山西省自然科学研究面上项目(批准号:202203021221060)
山西省研究生创新项目(批准号:2023SJ085)资助.
关键词
气凝胶粒子电极
高级氧化技术
卡马西平
三维电芬顿体系
降解机理
Aerogel particle electrode(MSRMBC@SA)
Advanced oxidation technology(AOPs)
Carbamazepine(CBZ)
Three-dimensional electrofenton system(3D-EF-MSRMBC@SA)
Degradation mechanism
