光催化技术对研磨废水反渗透浓水COD的降解研究

COD Degradation of Reverse Osmosis Concentrated Water from Grinding Wastewater by Photocatalytic Technology

虽研磨废水反渗透浓水量大,但污染物浓度不高,回用潜力巨大,因此其降解处理及回用技术是目前电子玻璃器件产业的研究重点.本文着重探索了光催化技术对研磨废水反渗透浓水COD降解效果,研究了不同光源、催化剂用量、光照强度、溶液初始pH值等因素对研磨废水反渗透浓水COD降解率的影响.研究结果表明光催化技术对研磨反渗透浓水具有较好的降解效果,光源、催化剂用量、光照强度等因素对COD去除率有明显的影响.而Fe^(3+)、Ag^(+)等金属离子能加快COD降解去除效率,过高的COD值则导致催化剂中毒,从而抑制光催化降解.该实验结果的获得为光催化技术在实际研磨废水反渗透浓水中的运用提供了理论依据.

Reverse osmosis concentrated water from grinding wastewater has a large amount of water but low concentration of pollutants,which has great potential for reuse.Its degradation treatment and reuse technolo-gy are the research focus of electronic glass device industry.This paper focuses on exploring the effect of pho-tocatalytic technology on COD degradation of reverse osmosis concentrated water from grinding wastewater,and studies the influence of different light sources,catalyst dosage,illumination intensity,initial pH value of solution and other factors on the COD degradation rate of reverse osmosis concentrated water from grinding wastewater.The results show that the photocatalytic technology has a good degradation effect on the reverse osmosis concentrated water from grinding wastewater.The light source,the amount of catalyst,the intensity of light and other factors have obvious effects on the COD removal rate.However,Fe^(3+),Ag^(+) and other metal ions can accelerate the removal efficiency of COD degradation,and too high COD value will lead to cata-lyst poisoning,thus inhibiting photocatalytic degradation.The experimental results provide a theoretical basis for the application of photocatalytic technology in reverse osmosis concentrated water from grinding wastewater.