粉末活性炭吸附去除水源水突发乙苯污染的小试研究-市政工程专业论文.docxVIP

哈尔滨工业大学工学硕士论文 哈尔滨工业大学工学硕士论文 - - II - Abstract Recent years, the water supply safety is threatened by pollution accident existing in source water especially the organic matters pollution. The accidents have caused serious damage of peoples health and property. Exposure to ethylbenzene in humans results in throat irritation and chest constriction, irritation of the eyes,even it can affect lungs, liver and kidneys. As an important raw material of chemical production, ethylbenzene Its main use in the petrochemical industry as a production intermediate of styrene. also widly existed in the lacquer and pesticides in the wastewater discharges, which would add the risk of sudden pollution in the soure water of a city. At present, one of the effective measures to deal with the sudden pollution of ethylbenzene was to add powdered activated carbon (PAC) to the soure water.In this paper, coal made carbon and wood made carbon was used to adsorption ethylbenzene, PAC surface physical and chemical properties also been analysis, the adsorption kinetics and isotherms of ethylbenzene were conducted in water with PAC. The optimal mathematical models were selected through the models used to fit the experiment data. the effect of pH, temperature, ionic strength, NOM on ethylbenzene adsorption onto PAC was studied. The research on the removal of ethylbenzene treated by PAC adsorption associated with coagulation was conducted. Results showed that two kinds of PAC surface groups,as carboxyl groups, lactones groups, phenolic hydroxyl groupnd and base group difference of -6.83% 4.01%, 3.01% and 0%, respectively. the zero charge points was 8.02 (wood) and 8.22 (coal). two kinds of PAC have large surface area of 1125.23 m2/g (coal) and 1210.21m2/g (wood), respectively. Micro pore surface area of wood made PAC are larger than the coal made PAC, particle size of PAC in the water mainly less 10μm. when Initial concentration of ethylbenzene is 4.2mg/L ,The rate of adsorption of ethylbenzene on PAC