摘要
以钛基掺硼金刚石为基体,采用电沉积的方法制备了Ti/BDD/PbO2复合电极,并将其用于化学需氧量(COD)的测定。采用扫描电子显微镜(SEM)和X射线衍射谱图(XRD)表征了电极的微观形貌及结构,采用电化学工作站考察了电极对有机物响应特性。实验结果表明,在1.45 V的低电位条件下,线性范围为0.5～175 mg/L,检测限为0.3 mg/L(S/N=3)。采用Ti/BDD/PbO2复合电极测定法和重铬酸钾标准方法对市政污水、食品废水及印染废水的对比结果表明,2种方法的相对误差小于10%,具有良好的一致性。
A novel composite electrode（Ti/BDD/PbO2） was prepared for chemical oxygen demand（COD） determination by amperometric method.The morphology and crystal structure of as-prepared electrode were characterized by scanning electron microscope（SEM） and X-ray diffraction（XRD）.The current signals to organic compounds were analyzed by an electrochemical system.Under the potential of 1.45 V,a linear range of 0.5~175 mg/L and a detection limit of 0.3 mg/L were achieved.The real samples from sewage plant,food and dyeing factories were applied to test the feasibility.The results measured by Ti/BDD/PbO2 electrode agreed well with those determined by the standard dichromate method.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第5期1749-1754,共6页
Chinese Journal of Environmental Engineering
基金
国家"863"高技术研究发展计划重点项目(2009AA06A417)
