首页|固废基气凝胶粒子电极的制备及电催化降解有机污染物的性能与机制

固废基气凝胶粒子电极的制备及电催化降解有机污染物的性能与机制

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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CaCl2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-EF-MSRMBC@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.
Preparation and Electrocatalytic Degradation Properties and Mechanism of Organic Pollutants of Solid Waste-based Aerogel Particle Electrode
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 CaCl2 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 three-dimensional 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-EF-MSRMBC@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.

Aerogel particle electrode(MSRMBC@SA)Advanced oxidation technology(AOPs)Carbamazepine(CBZ)Three-dimensional electrofenton system(3D-EF-MSRMBC@SA)Degradation mechanism

李赟、李红艳、张峰、肖子君、王芳、崔佳丽、杨群

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太原理工大学环境科学与工程学院,山西省市政工程研究生教育创新中心,晋中 030600

吕梁学院建筑与土木工程系,吕梁 033001

哈尔滨工业大学环境学院,城市水资源与水环境国家重点实验室,哈尔滨 150090

山西省生物研究院有限公司食用菌研究中心,太原 030006

黄土高原食用菌山西省重点实验室,太谷 030801

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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

吕梁市引进高层次科技人才重点研发项目山西省自然科学研究面上项目山西省研究生创新项目

2021RC-1-222022030212210602023SJ085

2024

10.7503/cjcu20240320

高等学校化学学报
中华人民共和国教育部委托 吉林大学和南开大学

高等学校化学学报

CSTPCD北大核心
影响因子：1.067
ISSN：0251-0790
年,卷(期)：2024.45(10)