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5.0 μmol/L，PMS浓度为0.4 mmol/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（SO₄^·-）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 p-chlorophenol (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^-1 for Fe(Ⅱ) concentration,0.4 mmol·L^-1 for 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.

张娟(1992-),女,在读研究生,研究方向为水的深度处理技术,1013365061@qq.com