粉末炭吸附处理给水厂原水突发乙苯污染研究

Powdered activated carbon adsorption for water works to cope with the sudden pollution of ethylbenzene in raw water

摘要:

为提高城市给水厂应对原水突发乙苯污染的应急处理能力,进行粉末炭(PAC)对水中乙苯的吸附效能研究.通过小试,考察了常规工艺对水中乙苯的去除效果,测定了粉末炭(PAC)对水中乙苯的吸附等温线和吸附动力学曲线.在此基础上,建立了PAC投量与乙苯初始质量浓度和吸附时间之间的数学模型,并通过PAC吸附小试进行了验证.结果表明:常规工艺难以有效去除水中乙苯,向原水投加PAC可快速去除水中乙苯,可作为给水厂应对原水突发乙苯污染的一种有效应急处理技术.

Abstract:

In order to improve waterworks’ ability of emergency response to ethylbenzene pollution,the efficiency of ethylbenzene adsorption onto PAC was experimentally studied.Bench experiments were conducted to estimate the removal of chlorbenzene by conventional water treatment process and to determine isotherm and kinetics for ethylbenzene adsorption onto powdered activated carbon(PAC).A theoretical formula of PAC dose with initial concentration of ethylbenzene and adsorption time was established and verified by experimental results.The results show that it is difficult for conventional water treatment process to remove ethylbenzene effectively;PAC can adsorb ethylbenzene in raw water rapidly with 80% and 95% of the equilibrium adsorption capacity at 5 min and 30 min,respectively;PAC adsorption is an effective emergency drinking water treatment technology for water works to cope with ethylbenzene sudden pollution in raw water.