摘要
研制了数据在线采集记录系统对高浓度苯酚在石墨电极上电解过程的循环伏安行为进行了研究。采用连续循环伏安法考察了体系电解的特点,并考察了支持电解质、扫描速率、苯酚的浓度对反应体系的影响。结果表明:峰电流密度与扫描速率的平方根及苯酚浓度呈线性递增关系,支持电解质的添加量在苯酚电解过程存在最佳值,多次扫描过程中峰电流密度有下降趋势。实验推断电解效率下降是由于电极表面被聚合物污染导致,这一现象对电解处理有机物种的系统控制过程具有重要意义。
The characteristics of cyclic voltammetry graph in the course of phenol electrolyte on graphite anode are investigated by automatic gathering and recording system. The successive cyclic voltammetry graph is used to described quality of drop of electrolyte efficiency. The effects of several factors as supporting electrolyte, scan rate and phenol concentration on electrolyze system are also investigated. The results show that peak of current density enhances linearly with increase of square root of scan or concentration of phenol, the amount of supporting electrolyte is optimal in the course of phenol electrolysis, and peak of current density decreases on the successive cyclic voltammetry graph as well. The decrease of electrolyze efficiency is deduced owing to fouling of electrode, which is very important to devise automatic system to treat organic pollutants with tendency of polymerization.
出处
《环境科学与技术》
CAS
CSCD
2003年第S1期11-12,46,共3页
Environmental Science & Technology
关键词
循环伏安图
苯酚
石墨电极
电极表面污染
cyclic voltammetry graph
phenol
graphite electrode
fouling of the electrode
