Pb^(2+)在掺硼金刚石膜电极上的电化学行为

Influence of electrolyte system to electrochemical behavior of lead Ions in BBD film electrode

为了充分发挥掺硼金刚石膜(BDD)电极在分析检测工业废水中重金属离子的优势,利用BDD电极作为工作电极,采用线性扫描阳极溶出伏安法测定水溶液中的铅离子,考察了硝酸、硫酸、高氯酸、盐酸4种酸体系对铅离子分析测试的影响。结果发现,在实验室条件下检测铅离子最优的支持电解质体系是硫酸,并且与其他3种酸(硝酸、盐酸、高氯酸)相比,硫酸更加稳定,不具挥发性。

In order to give full play to boron-doped diamond film （BDD） electrode in the analysis and detection of heavy metal ions in industrial wastewater, this paper takes BDD electrode as the working electrode. Lead ions in aqueous solution is measured by linear sweep anodic stripping voltammetry. The impact of nitric acid, sulfuric acid, perchloric acid, hydrochloric acid to the analysis and testing of lead ions are studied. It is ultimately found that in experiments under optimal laboratory conditions lead ion detection system supporting electrolyte is sulfuric acid. Compared with the other acids （nitric acid, hydrochloric acid, perchloric acid）, sulfuric acid is more stable and non-volatile.