pH modeling for maximum dissolved organic matter removal by enhanced coagulation  

作　　者：Jiankun Xie Dongsheng Wang John van Leeuwen Yanmei Zhao Linan Xing Christopher W. K. Chow 

机构地区：[1]State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China [2]SA Water Centre for Water Management and Reuse, NBE, Universit of South Australia, Australia [3]Australian Water Quality Centre, SA Water, 250 Victoria Square, Adelaide, SA 5000, Australia

出　　处：《Journal of Environmental Sciences》2012年第2期276-283,共8页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 50921064,51025830);the National Basic Research Program (973) of China(No. 2011CB933700);the Special Co-construction Project of Beijing Municipal Commission of Education

摘　　要：Correlations between raw water characteristics and pH after enhanced coagulation to maximize dissolved organic matter（DOM） removal using four typical coagulants（FeCl3,Al2（SO4）3,polyaluminum chloride（PACl） and high performance polyaluminum chloride（HPAC）） without pH control were investigated.These correlations were analyzed on the basis of the raw water quality and the chemical and physical fractionations of DOM of thirteen Chinese source waters over three seasons.It was found that the final pH after enhanced coagulation for each of the four coagulants was in？uenced by the content of removable DOM（i.e.hydrophobic and higher apparent molecular weight（AMW） DOM）,the alkalinity and the initial pH of raw water.A set of feed-forward semi-empirical models relating the final pH after enhanced coagulation for each of the four coagulants with the raw water characteristics were developed and optimized based on correlation analysis.The established models were preliminarily validated for prediction purposes,and it was found that the deviation between the predicted data and actual data was low.This result demonstrated the potential for the application of these models in practical operation of drinking water treatment plants.Correlations between raw water characteristics and pH after enhanced coagulation to maximize dissolved organic matter（DOM） removal using four typical coagulants（FeCl3,Al2（SO4）3,polyaluminum chloride（PACl） and high performance polyaluminum chloride（HPAC）） without pH control were investigated.These correlations were analyzed on the basis of the raw water quality and the chemical and physical fractionations of DOM of thirteen Chinese source waters over three seasons.It was found that the final pH after enhanced coagulation for each of the four coagulants was in？uenced by the content of removable DOM（i.e.hydrophobic and higher apparent molecular weight（AMW） DOM）,the alkalinity and the initial pH of raw water.A set of feed-forward semi-empirical models relating the final pH after enhanced coagulation for each of the four coagulants with the raw water characteristics were developed and optimized based on correlation analysis.The established models were preliminarily validated for prediction purposes,and it was found that the deviation between the predicted data and actual data was low.This result demonstrated the potential for the application of these models in practical operation of drinking water treatment plants.

关 键 词：enhanced coagulation MODELING DOM fractionation pH control 

分 类 号：TQ085.4[化学工程] TS264.23[轻工技术与工程—发酵工程]