光催化氧化降解高盐废水中EDTA的研究  

Photocatalytic Oxidation Degradation of Organic Matter in High-Saline Wastewater

作　　者：薛诚 刘东方[1] 梁啸夫 XUE Cheng;LIU Dongfang;LIANG Xiaofu(College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China)

机构地区：[1]南开大学环境科学与工程学院,天津300350

出　　处：《水处理技术》2021年第5期28-31,41,共5页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07107002)。

摘　　要：研究了UV/H_(2)O_(2)/Ti O_(2)光催化体系对高盐氛围中EDTA的去除效果,通过比较不同组合方法、催化剂的投加量、过氧化氢含量、废水p H、氯化钠浓度、硫酸钠浓度以及污染物初始浓度对该反应效率的影响。结果表明,在EDTA二钠浓度为500 mg/L,初始p H为4,硫酸钠浓度为30 g/L的溶液,加入8 m L/L 30%的H_(2)O_(2)溶液,1 g/L Ti O2光催化反应180 min,对EDTA去除率可以达到99.06%,在p H较低的条件对EDTA的去除效果更好。硫酸钠与氯化钠投加会抑制EDTA的去除,并且氯化钠的抑制效果大于硫酸钠。The removal effect of UV/H_(2)O_(2)/Ti O_(2)photocatalytic system on EDTA in high salt atmosphere was studied by comparing different combinations,catalyst dosage,hydrogen peroxide content,wastewater p H,sodium chloride concentration,sodium sulfate concentration and pollution.The effect of the initial concentration of the material on the efficiency of the reaction.The results showed that in the solution of EDTA disodium concentration of 500 mg/L,initial p H of 4,sodium sulfate concentration of 30 g/L,8 m L/L of 30%H_(2)O_(2)solution,1 g/L Ti O_(2)photocatalytic reaction for 180 min The removal rate of EDTA can reach 99.06%,and the removal effect of EDTA is better under the condition of lower p H.Sodium sulfate and sodium chloride do not inhibit the removal of EDTA,and the inhibitory effect of sodium chloride is greater than that of sodium sulfate..

关 键 词：光催化 高盐 EDTA 氯化钠 硫酸钠 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]