摘要
采用光电催化氧化技术对天津市某石化企业反渗透单元浓水进行处理。经光催化、电化学及光电催化氧化处理后浓缩液出水的COD、氨氮及色度去除率进行了对比研究。详细探讨了不同电流密度、反应时间及紫外灯功率对COD、氨氮及色度去除效果的影响。结果表明,在电流密度为2.0 mA/cm2,紫外灯光强度为30μW/cm2的条件下,处理150min后,COD的去除率为92.06%,氨氮浓度从44.61 mg/L下降至2.84 mg/L,色度去除率达到100%。对光电催化氧化法处理不同时间的出水进行了三维荧光光谱及凝胶色谱分析。结果表明,光电催化氧化法可将反渗透浓水中大部分大分子有机物结构破坏,使其分解成小分子有机物。
Treatment of the reverse osmosis concentrate from a petrochemical factory in Tianjin city was performed by photoelectrocatalysis oxidation process. Removal efficiencies of COD,NH3-N and color degree of the concentrates by individual photocatalysis,electrolysis and photoelectrocatalysis were compared. The effects of current densities,reaction time,and UV light intensity on the removal of COD,NH3-N and color degree were investigated. When the current densities was 2. 0 mA /cm2 and UV light intensity was 30 μW /cm2,COD removal of concentrate by the photoelectrocatalysis at 150 min was 92. 06%,NH3-N concentration decreased from 44. 61 mg / L to 2. 84 mg /L,removal efficiency of the color degree was 100%. In addition,3DEEM and gel permeation chromatograph was used to analyze the variation of the components in the photoelectrocatalysis process. The obtained results indicated that the components with large molecular weight were destroyed and transformed into the components with small molecular weight.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第8期3189-3194,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金优秀青年基金项目(51222802)
关键词
光电催化氧化
反渗透浓水
TiO2/Ti电极
photoelectrocatalysis oxidation
reverse osmosis concentrate
TiO2/Ti electrode
