碳基复合材料用作电芬顿阴极处理垃圾渗滤液的效果研究  

Study on the effect of carbon matrix composite materials as electro Fenton cathode and its performance for landfill leachate treatment

作　　者：魏一恺 杨俊 武梦杰 周欣然 游自强 王趁义[1] WEI Yikai;YANG Jun;WU Mengjie;ZHOU Xinran;YOU Ziqiang;WANG Chenyi(College of Biology and Environment,Zhejiang Wanli University,Ningbo Zhejiang 315100)

机构地区：[1]浙江万里学院生物与环境学院,浙江宁波315100

出　　处：《环境污染与防治》2025年第1期42-48,58,共8页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.21207036);浙江省基础公益研究计划项目(No.LGF21E080014);浙江省一流学科“生物工程”研究生创新项目(No.CX2022016、No.CX2022021、No.CX2022013);浙江省大学生科技创新活动计划暨新苗人才计划项目(No.2022R420B020、No.2023R419006)。

摘　　要：针对目前电芬顿复合电极原料昂贵及制备工艺复杂等问题,以活性炭和Fe_(3)O_(4)为基础原料,以钛网、不锈钢网、铁网为导电基底制备3种碳基复合阴极材料(CEM),分别记为TBT、SSBT、IBT。通过单因素试验筛选CEM的最佳制备条件,选取性能最优的CEM用于电芬顿处理垃圾渗滤液,用响应面法得到电芬顿处理的初始pH、外接电压、Fe^(2+)投加量与COD去除率之间的二次多项式模型,优化电芬顿的运行条件。结果表明:3种CEM材料中SSBT的性能最优,其最佳制备条件为黏结剂(Na_(2)SiO_(3)·9H_(2)O)∶基础原料的质量比为4∶10,基础原料中Fe_(3)O_(4)的掺杂量为2%(质量分数),煅烧温度为600℃;SSBT用于电芬顿处理垃圾渗滤液的最佳运行条件为初始pH 2.6,外接电压10.08 V,Fe^(2+)投加量0.47 mmol/L,在此条件下COD的去除率的实测值与预测值分别为86.10%和86.41%,平均绝对误差为0.36%,说明模型模拟结果符合实际;SSBT表面三维结构丰富,Fe_(3)O_(4)在材料中稳定负载,经15次重复性测试,SSBT的COD去除率仅下降7.81百分点,表明其具有良好的稳定性。研究结果可为电芬顿CEM材料的设计和运行条件的优化提供参考。In response to the current problems of expensive raw materials and complex preparation processes for electro Fenton composite electrodes,three types of carbon based composite cathode materials(CEM)were prepared using activated carbon and Fe_(3)O_(4)as basic raw materials,and titanium mesh,stainless steel mesh,iron mesh as conductive substrates,respectively referred to as TBT,SSBT and IBT.The optimal preparation conditions for CEM were screened through single factor experiments,and the CEM with the best performance were selected for the electro Fenton treatment of landfill leachate.A quadratic polynomial model was obtained using response surface methodology to determine the relationship between initial pH,external voltage,Fe^(2+)dosage of electro Fenton and COD removal rate,in order to optimize its operating conditions.The results showed that SSBT had the best performance among the three CEM materials.The optimal preparation conditions were a mass ratio of binder(Na_(2)SiO_(3)·9H_(2)O)to base material of 4∶10,a doping amount of Fe_(3)O_(4)in the base material of 2%(mass fraction),and a calcination temperature of 600℃.The optimal operating conditions for SSBT in electro Fenton treatment of leachate were an initial pH of 2.6,an external voltage of 10.08 V,and a Fe^(2+)dosage of 0.47 mmol/L.Under these conditions,the measured and predicted COD removal rates were 86.10%and 86.41%respectively,with average absolute error of 0.36%,indicating that the model simulation results were in line with reality.The surface of SSBT had a rich three-dimensional structure,and Fe 3O 4 was stably loaded in the material.After 15 repeated experiments,the COD removal rate of SSBT only decreased by 7.81 percentage points,indicating its good stability.The research results could provide reference for the design of electro Fenton CEM materials and optimization of operating conditions.

关 键 词：电芬顿 碳基复合阴极 制备与表征 垃圾渗滤液 响应面法 

分 类 号：TB33[一般工业技术—材料科学与工程] X703[环境科学与工程—环境工程]