摘要
用辉光放电等离子体技术对茜素红降解进行了研究,藉助紫外光谱分析了其降解过程.结果表明,在pH≈7时,茜素红于60min便可以被完全降解,且其排放液接近无色,降解过程中溶液pH值降低,说明反应过程中可能有羧酸类物质生成.两电极间的距离与催化剂对降解率有显著影响,COD先升高后降低,若在Fe2+存在时,反应只需10min,且COD值不断减小.
This paper represents a novel method on the plasma degradation of alizarin red by glow discharge ~electrolysis . The degradation process was observed using Ultraviolet (UV) absorption spectra. The results showed that alizarin red could be degraded throughout within 60 minutes. The value of pH of the solution became low during the process of degradation due to the carboxylic acids formed. The distance between anode and cathode and the presence of Fe^2+ had appreciable effect on the degradation of alizarin red.In the absence of Fe^2+ , the chemical oxygen demand (COD) of sample increased at first and then decreased in the degradation. In the presence of Fe^2+ , it became lower and lower and the reaction could be only finished within 10 min.
出处
《环境化学》
CAS
CSCD
北大核心
2005年第2期183-185,共3页
Environmental Chemistry
基金
西北师范大学科技创新工程(KJCXGC01)
教育部重点科技基金(00250)
甘肃省自然科学基金(3ZS041-A25-028)资助项目
