基于碳纤维刷阴极的改进电芬顿技术处理含酚废水  

Modified Electro‑Fenton Technology for Degradation of Phenol‑containing Wastewater Based on Carbon Fiber Brush Cathode

作　　者：马文成 张靖娜 陈炯棱 钟丹 李金鑫 李克非 MA Wen‑cheng;ZHANG Jing‑na;CHEN Jiong‑leng;ZHONG Dan;LI Jin‑xin;LI Ke‑fei(State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China;Quanzhou Quangang District Water Conservancy and Water Affairs Construction Development Co.Ltd.,Quanzhou 362100,China;HIT Boshi Environmental Engineering Co.Ltd.,Harbin 150090,China)

机构地区：[1]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,黑龙江哈尔滨150090 [2]泉州市泉港区水利水务建设发展有限公司,福建泉州362100 [3]哈尔滨工大博实环境工程有限责任公司,黑龙江哈尔滨150090

出　　处：《中国给水排水》2023年第11期104-108,共5页China Water & Wastewater

基　　金：黑龙江省“头雁”团队项目(HIT-SE-01);省部共建西北旱区生态水利国家重点实验室科研课题(2018KFKT-6);国家自然科学基金资助面上项目(51778177)。

摘　　要：针对传统电-Fenton技术铁泥产量大、pH适用范围窄等问题,选用了苯酚为目标污染物,以RuO-IrO2/Ti为阳极,碳纤维刷为阴极构建电-Fenton体系,研究了电流强度、H_(2)O_(2)浓度及初始pH对苯酚降解效果的影响,并利用扫描电子显微镜(SEM)对反应前后碳纤维刷表面进行分析。结果表明,在pH为3、H_(2)O_(2)浓度为20 mmol/L、电流为200 mA条件下,反应120 min后,苯酚降解率可达96.46%,H_(2)O_(2)利用率达93.72%,自由基捕获实验证实了该电-Fenton体系的主要活性物质是羟基自由基(·OH),推测可能是因为碳纤维刷有较高的电子传递效率或边缘活性位点,从而加快H_(2)O_(2)产生·OH。此外,循环测试性能与相关分析表明,碳纤维刷具有良好的化学稳定性,循环使用25次后,对苯酚的降解率仍能达到90%以上。Aiming at problems of traditional electro‑Fenton technology,such as large iron mud production and narrow application range of pH,the electro‑Fenton system was established by using RuO‑IrO2/Ti as the anode and carbon fiber brush as the cathode to degrade the target pollutant of phenol.The effects of current intensity,hydrogen peroxide concentration and initial pH on phenol degradation were investigated.The surface of the carbon fiber brush before and after the reaction was analyzed by scanning electron microscope(SEM).When the pH was 3,H_(2)O_(2) concentration was 20 mmol/L,current was 200 mA and reaction time was 120 min,the degradation rate of phenol reached 96.46%,and the utilization rate of H_(2)O_(2) reached 93.72%.The free radical capture experiments confirmed that the main active species of the electro‑Fenton system was hydroxyl radical(·OH).It was speculated that carbon fiber brush had higher electron transfer efficiency or marginal active sites,thus accelerating H_(2)O_(2) to produce·OH.In addition,the cyclic test performance and correlation analysis showed that the carbon fiber brush had good chemical stability,and the degradation rate of phenol still reached more than 90%after 25 cycles.

关 键 词：电-FENTON 碳纤维刷 羟基自由基 苯酚 

分 类 号：TU992[建筑科学—市政工程]