硫化亚铁/臭氧体系去除水中对氨基苯磺酰胺的试验

Experiment of Ferrous Sulfide and Ozone System for Sulfanilamide Removal in Water

研究利用硫化亚铁(FeS)与臭氧形成高级氧化体系,用以去除水体中的有机污染物——对氨基苯磺酰胺(SN)。通过设置不同初始pH、污染物初始浓度、臭氧投加量、FeS投加量,以总有机碳(TOC)为指标探究了各单因素条件下FeS和臭氧协同去除SN的效果。研究结果表明:当pH值为7.0、臭氧质量浓度为8.0 mg/L、FeS投加量为1.0 g/L、SN溶液初始质量浓度为23.9 mg/L,反应60 min后,本体系对于水中SN的去除率可以达到73.9%,相较于单独臭氧体系提高了37.7%;向处理体系中添加自由基抑制剂NaHCO_(3)及Na_(2)HPO_(4)时,该体系去除SN效果明显降低,说明臭氧与FeS联合作用,促进了体系产生·OH,提高了水中SN的降解率。

In this study,ferrous sulfide(FeS)and ozone were combined to make an advanced oxidation system,which was used to remove the sulfanilamide(SN)from water.Under different initial pH value,SN initial concentration,ozone concentration and FeS dosage,the removal of SN was explored.And total organic carbon(TOC)was discussed as an indicator.Results indicated that under the condition of pH value of 7.0,ozone concentration of 8.0 mg/L and FeS dosage of 1.0 g/L,23.9 mg/L of SN initial mass concentration in the water was removed up to 73.9%after 60 min of treatment,which was 37.7%higher than that by ozone treatment alone.The addition of NaHCO_(3) and Na_(2)HPO_(4) as radicals scavengers into the system significantly decreased the removal rate of SN,which proved that the combination of ozone and FeS stimulated the generation of·OH,and the formation of·OH led to improved SN removal.