摘要
研究了芬顿(Fe^(2+)/H_(2)O_(2))体系和亚铁离子活化过硫酸钠(Fe^(2+)/PS)体系在降解地下水氯苯(CB)过程中对氯苯酚(p-CBOH)稳定中间体的产量,运用响应面法考察了氧化剂(H_(2)O_(2)或Na_(2)S_(2)O_(8))投加量、催化剂(Fe^(2+))投加量以及初始pH对CB降解率和p-CBOH产量的影响。结果表明,当pH为2.40,H_(2)O_(2)投加量为1.31 mmol/L,FeSO_(4)投加量为1.41 mmol/L时,Fe^(2+)/H_(2)O_(2)体系降解CB过程中产生p-CBOH中间体的最小质量浓度为0.30 mg/L,与预测值0.36 mg/L较吻合;当pH为4.00,Na_(2)S_(2)O_(8)投加量为3.50 mmol/L,FeSO_(4)投加量为1.50 mmol/L时,Fe^(2+)/PS体系降解CB过程中产生p-CBOH中间体的最小质量浓度为0.00 mg/L,与预测值完全吻合。上述两种情况下CB的去除率均为100%。
The production of p-chlorophenol(p-CBOH),one of the stable intermediates,during the degradation of chlorobenzene(CB)in groundwater was studied in a Fenton(Fe^(2+)/H_(2)O_(2))system and a ferrous ion activated sodium persulfate(Fe^(2+)/PS)system,respectively.The effects of oxidant(H_(2)O_(2) or Na_(2)S_(2)O_(8))dosage,catalyst(Fe^(2+))dosage,and pH on the production of p-CBOH and the degradation of CB were examined by response surface method.The results showed that,for the Fe^(2+)/H_(2)O_(2) system,the minimum mass concentration of p-CBOH intermediate produced during the degradation of CB was 0.30 mg/L when dosing H2O21.31 mmol/L and FeSO_(4) 1.41 mmol/L at pH 2.40,which was consistent with the predicted value of 0.36 mg/L.While the minimum mass concentration of p-CBOH was 0.00 mg/L during the degradation of CB by the Fe^(2+)/PS system with Na_(2)S_(2)O_(8) 3.50 mmol/L and FeSO_(4) 1.50 mmol/L at pH 4.00,which was consistent with the predicted value of 0.00 mg/L.In the above two cases,the removal rate of CB was 100%.
作者
徐向阳
唐华晨
张宏
徐新
李超
王殿二
XU Xiangyang;TANG Huachen;ZHANG Hong;XU Xin;LI Chao;WANG Dianer(Everbright Environmental Remediation(Jiangsu)Limited,Nanjing 211100,China)
出处
《电镀与涂饰》
CAS
北大核心
2021年第11期876-882,共7页
Electroplating & Finishing
关键词
污染场地
氯苯
芬顿试剂
过硫酸钠
降解
对氯苯酚
响应面法
contaminated site
chlorobenzene
Fenton’s reagent
sodium persulfate
degradation
p-chlorophenol
response surface methodology
