羟胺强化Fe(Ⅱ)/过一硫酸盐体系降解氯酚的研究  

Degradation of p-chlorophenol by hydroxylamine assisted ferrous/peroxymonosulfate system

作　　者：张娟[1] 黄彦旻 吴斌程 王平[1] 陈丽玮[1] ZHANG Juan HUANG Yan-min WU Bin-cheng WANG Ping CHEN Li-wei(College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China)

机构地区：[1]南京林业大学生物与环境学院,江苏南京210037

出　　处：《现代化工》2017年第8期94-97,99,共5页Modern Chemical Industry

基　　金：国家自然科学基金(51408317);江苏省自然科学基金(BK20140966);江苏省高校自然科学研究项目(14KJB610006)

摘　　要：利用羟胺(HA)强化Fe(Ⅱ)/过一硫酸盐(PMS)体系处理对氯苯酚(4-CP)溶液,考察了HA浓度、Fe(Ⅱ)浓度、PMS浓度和pH等对该体系降解4-CP效能的影响。结果表明:在反应时间为10 min,Fe(Ⅱ)浓度为5.0μmol/L,PMS浓度为0.4mmol/L和pH为3.0的条件下,0.2 mmol/L HA可将4-CP的去除率从6.77%提高到89.67%;该体系的降解效能与HA浓度、Fe(Ⅱ)浓度和PMS浓度成正比;较低的Fe(Ⅱ)浓度即可快速、持续地降解4-CP;最佳摩尔比n(HA)∶n(PMS)为1∶1,最佳pH为3.0~5.0;通过投加自由基专属捕获剂甲醇和叔丁醇,判定硫酸根自由基(SO·-4)为该体系主要的活性物种。Hydroxylamine（ HA） is employed to assist Fe（ Ⅱ）/peroxymonosulfate（ PMS） system to treat with pchlorophenol（ 4-CP） solution.The effects of HA concentration,Fe（ Ⅱ） concentration,PMS concentration and pH value on the removal rate of 4-CP by this system are explored.It is found that under the reaction conditions： 10 min for reaction time,5. 0 μmol·L^-1for Fe（ Ⅱ） concentration,0. 4 mmol·L^-1for PMS concentration and pH = 3. 0,the 4-CP degradation efficiency can be increased from 6. 77% to 89. 67% via the addition of 0. 2 mmol·L^-1 HA. The 4-CP degradation efficiency by HA/Fe（ Ⅱ）/PMS system is proportional to the concentration of HA,Fe（ Ⅱ） and PMS.A very low dosage of Fe（ Ⅱ） is sufficient to cause 4-CP to degrade rapidly and sustainably by HA/Fe（ Ⅱ）/PMS system.The optimal molar ratio between HA and PMS is 1 ∶ 1,and the optimal Ph is in the range of 3. 0 to 5. 0. Sulfate radical（ SO4·-） is distinguished as the major reactive species in this system by addition of radical trapping agent methanol and tert-butyl alcohol.

关 键 词：羟胺 过一硫酸盐 对氯苯酚 硫酸根自由基 

分 类 号：TU992.3[建筑科学—市政工程]