Prediction of DOM removal of low specific UV absorbance surface waters using HPSEC combined with peak fitting  

作　　者：Linan Xing Rolando Fabris W.K.Chow John van Leeuwen Mary Drikas Dongsheng Wang 

机构地区：[1]State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Scineces,Beijing 100085,China [2]Australian Water Quality Centre,South Australian Water Corporation,256 Victoria Square,Adelaide,South Australia 5000,Australia [3]SA Water Centre for Water Management and Reuse,University of South Australia,Mawson Lakes,South Australia 5095,Australia

出　　处：《Journal of Environmental Sciences》2012年第7期1174-1180,共7页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 51025830);the National Basic Research Program of (973) China (No.2011CB933700);the South Australian Premier’s Science and Research Fund Project "Development of materials engineering solutions for treatment of Murray-Darling Basin sourced water supplies";supported by the special fund from the State Key Laboratory of Environmental Aquatic Chemistry, Project 08K08ESPCR

摘　　要：High performance size exclusion chromatography （HPSEC） is used in water quality research primarily to determine the molecular weight distribution of the dissolved organic matter （DOM）, but by applying peak fitting to the chromatogram, this technique can also be used as a tool to model and predict DOM removal. Six low specific UV absorbance （SUVA） source waters were treated using coagulation with alum and both the source and treated water samples were analysed using HPSEC. By comparing the molecular weight profiles of the source and treated waters, it was established that several DOM components were not effectively removed by alum coagulation even after high dosage alum treatment. A peak-fitting technique was applied based on the concept of linking the character （molecular weight profile） of the recalcitrant organics in the treated water with those of the source water. This was then applied to predict DOM treatability by determining the areas of the peaks which were assigned to removable organics from the source water molecular weight profile after peak fitting, and this technique quantified the removable and non-removable organics. The prediction was compared with the actual dissolved organic carbon （DOC） removal determined from jar testing and showed good agreement, with variance between 2% and 10%. This confirmed that this prediction approach, which was originally developed for high SUVA waters, can also be applied successfully to predict DOC removal in low SUVA waters.High performance size exclusion chromatography （HPSEC） is used in water quality research primarily to determine the molecular weight distribution of the dissolved organic matter （DOM）, but by applying peak fitting to the chromatogram, this technique can also be used as a tool to model and predict DOM removal. Six low specific UV absorbance （SUVA） source waters were treated using coagulation with alum and both the source and treated water samples were analysed using HPSEC. By comparing the molecular weight profiles of the source and treated waters, it was established that several DOM components were not effectively removed by alum coagulation even after high dosage alum treatment. A peak-fitting technique was applied based on the concept of linking the character （molecular weight profile） of the recalcitrant organics in the treated water with those of the source water. This was then applied to predict DOM treatability by determining the areas of the peaks which were assigned to removable organics from the source water molecular weight profile after peak fitting, and this technique quantified the removable and non-removable organics. The prediction was compared with the actual dissolved organic carbon （DOC） removal determined from jar testing and showed good agreement, with variance between 2% and 10%. This confirmed that this prediction approach, which was originally developed for high SUVA waters, can also be applied successfully to predict DOC removal in low SUVA waters.

关 键 词：DOM high performance size exclusion chromatography peak fitting water treatment 

分 类 号：X832[环境科学与工程—环境工程] P231.5[天文地球—摄影测量与遥感]