Study on the effects of organic matter characteristics on the residual aluminum and flocs in coagulation processes

作     者：Hui Xu Dawei Zhang Zhizhen Xu Yanjing Liu Ruyuan Jiao Dongsheng Wang 

作者机构：Key Laboratory of Drinking Water Science and TechnologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China. State Key Laboratory of Environmental Aquatic ChemistryResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Environmental and Municipal EngineeringXi'an University of Architecture and TechnologyXi'an 710055China Key Laboratory of Occupational Safety and Health.Beijing Municipai Institute of Labor ProtectionB-eijing 100054China College of Life Science and Bio-engineeringBeijing University of TechnologyBeijing 100224China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2018年第30卷第1期

页      面：307-317页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51608515 51025830 51008293 51578527 41201498 51138008 51138010 51308008 21677156) 

主　　题：Coagulation Residual aluminum Organic matter Floc size Fractal dimension 

摘      要：Characteristics of organic matter may affect the residual aluminum after the coagulation process. This study reported the results of a survey for one drinking water treatment plant and measured the concentration of residual aluminum species with different molecular *** results indicated that humic acid or organic matter whose molecular weight was smaller than 1500 Da had significant effects on residual aluminum. All the treatment processes were ineffective in removing dissolved organic matter whose molecular weight was smaller than1500 Da. These results also indicated that the addition of sand or polyacrylamide in the coagulation process could greatly decrease the concentration of humic acid, and the concentration of residual aluminum also decreased. These results revealed that for all water samples after filtration, the majority of total residual aluminum existed in the form of total dissolved aluminum, accounting for 70%–90%. The concentration of residual aluminum produced in bovine serum albumin solutions indicated that when the DOC was larger than4.0 mg/L, there were still significant differences when the solution p H value varied from 4.0 to 9.0.