改性介孔碳对饮用水中3种指标吸附性能分析

Adsorption Performance Analysis of Modified Mesoporous Carbon on Three Indexs in Drinking Water

为探究改性介孔碳对饮用水中污染物的去除效果,利用氯化铁和氧化锰分别对介孔碳进行改性,对硫化物、二氯乙酸和大肠杆菌这3种指标的去除效能和时间、吸附剂投加量等影响因素进行了研究。结果表明除C-Mn O复合材料对单一硫化物的吸附量低于介孔碳外,在各种不同条件下改性材料均比介孔碳的吸附能力有一定提高。此外,对于硫化物、二氯乙酸和大肠杆菌的混合污染物,C-Fe复合材料和C-Mn O复合材料对硫化物的去除率在介孔碳98.6%基础上增加至99.98%和99.73%;C-Fe复合材料和C-Mn O复合材料对二氯乙酸去除率在介孔碳43.62%基础上分别提升到45.37%和44.92%;介孔碳能吸附90%的大肠杆菌,改性材料对大肠杆菌的吸附能力略有提升,均从90%升至95%,改性介孔碳去除污染物优势明显。

This study is to explore adsorption of modified mesoporous carbon on contaminants in drinking water,and the experiment was conducted to improve the adsorption performance of mesoporous carbon through combining ordered mesoporous carbon with ferric-chloride,manganese oxide or the adsorption efficiency of three indexs such as sulfide,dichloroacetic acid or Escherichia coli and the effects of time,adsorbent dosage were studied. It was found that the modified materials are better than mesoporous carbon in different conditions,only except OMC-Mn O in the adsorption of sulfide.Also,it turns out that mesoporous carbon can remove 98.6% of sulfide from the mixed solution of sulfide,dichloroacetic acid and Escherichia coli. The removal rate can reach up to 99.98% and 99.73% while mesoporous carbon was replaced by OMCFe and OMC-Mn O. For dichloroacetic acid,the removal rate is 43.62%（mesoporous carbon）,45.37%（OMC-Fe） and44.92%（OMC-Mn O）. According to the result of research,modified mesoporous carbon ought to adsorb 5% Escherichia coli more than mesoporous carbon＇s 90%,modified mesoporous carbon has an excellent advantage.