H_(2)O_(2)改性活性炭活化过硫酸钠降解盐酸金霉素  

Degradation of Chlortetracycline Hydrochloride by NaSO Catalyzed with HO Modified Activated Carbon

作　　者：安璐 肖鹏飞[1] AN Lu;XIAO Pengfei(College of Forestry,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《水处理技术》2021年第5期62-66,共5页Technology of Water Treatment

基　　金：中央高校基本科研业务费专项资金项目(2572017CA08);黑龙江省自然科学基金项目(LH_(2)019D002)。

摘　　要：研究了不同改性活性炭(AC)活化过硫酸钠降解盐酸金霉素(CH)的效果。结果表明,不同改性AC对过硫酸钠的活化效果依次为:H_(2)O_(2)改性>NaOH改性>NH_(3))·H_(2)O改性>HNO3改性;H_(2)O_(2)的质量分数为30%的双氧水处理后的AC活化效果最佳。提高H_(2)O_(2)改性AC的投加量能加速过硫酸钠对CH的降解,投加量为1 g时(CH溶液和过硫酸钠溶液各50 mL),质量浓度为50 mg/L的CH在2 h后几乎全部被去除。CH的去除率随着其初始质量浓度由20mg/L增加至100 mg/L而不断下降。溶液pH对该活化过硫酸钠体系去除CH的影响不明显,但溶液中Cl-的存在会抑制体系的降解效率。HO·和SO_(4)^(-)·在反应不同时期均参与了体系对CH的降解。紫外可见光谱分析发现CH的苯环结构遭到破坏而分解。The degradation efficiency of chlortetracycline hydrochloride(CH)by Na2S2O8activated with different modified activated carbon(AC)was investigated.The results showed that,the activation efficiency of different modified AC on Na2S2O8was in the order of H_(2)O_(2)>Na OH>NH_(3))·H_(2)O>HNO3.The AC activation effect was the best after treatment with H_(2)O_(2)with the mass fraction of 30%.Increasing the dosage of H_(2)O_(2)modified AC was beneficial to the degradation of CH in activated Na2S2O8system.When the dosage of H_(2)O_(2)modified AC was 1 g(each of CH solution and sodium persulfate solution was 50 m L),CH with mass concentration of 50 mg/L was almost removed after 2 h.The removal rate of CH decreased with the increase of initial mass concentration of CH from 20 to 100 mg/L.The p H of the solution had no obvious effect on the removal of CH by H_(2)O_(2)-AC activated Na2S2O8.However,the presence of chloride ions in the solution inhibited the removal rate of CH.The SO_(4)^(-)·and HO·were involved in the degradation of CH in different reaction periods.UV-vis analysis showed that the benzene ring of CH had been broken and degraded.

关 键 词：盐酸金霉素 H_(2)O_(2)改性活性炭 活化过硫酸盐 氧化降解 硫酸根自由基 

分 类 号：X703.1[环境科学与工程—环境工程]