Removal of VOCs from Sudden Polluted Raw Water by Air Stripping

• Published in: 东华大学学报（英文版） Vol. 28; no. 5; pp. 456 - 459
• Main Author: 林明利 殷晓桃 崔福义 赵志伟 姜琦
• Format: Journal Article
• Language: English
• Published: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China%Pan-China Construction Group, Beijing 100070, China%Environmental Development Center of Ministry Environmental Protection, Beijing 100029, China 2011
• Subjects: Henry's law constant (H); removal; air stripping; volatile organic compounds (VOCs); emergency water treatment
• ISSN: 1672-5220

Volatile organic compounds （VOCs） are widely used in various industrial processes and generate water pollutions. VOCs removal from raw water is an important task for waterworks to guarantee drinking water security. The removal of VOCs such as chlorobenzene （CB） and ethylbenzene （EB） from raw water by air stripping was investigated under various conditions, inciuding the variation of temperature （5-30~C）, pH （3.5-10.5）, and air/water ratio （10-60）. The air stripping removal efficiency of VOCs decreased with VOCs concentration declining in water. And Henry＇s law constant was demonstrated as an indicator of the estimation of VOCs removal efficiency for air stripping. The effects of temperature and the ratio of air and water were found to play a great role in VOCs removal, but the effect of pH seemed to be negligible. This study demonstrates that air stripping provides a promising opportunity in removing VOCs in drinking water treatment, especially for the relatively high concentration of VOCs.