Investigation on the Key Factors and the Solution for pH Value Decrease in Carbon Filter in O3-BAC Process

doi:10.1016/S1004-9541(13)60555-8

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (8): 914-919.DOI: 10.1016/S1004-9541(13)60555-8

• 能源、资源与环境技术 • 上一篇下一篇

Investigation on the Key Factors and the Solution for pH Value Decrease in Carbon Filter in O₃-BAC Process

陆少鸣, 陈江玲, 李芳

College of Environmental Science & Engineering, South China University of Technology, Guangzhou 510006, China

收稿日期:2012-10-25 修回日期:2013-02-01 出版日期:2013-08-28 发布日期:2013-08-24
通讯作者: LU Shaoming
基金资助:
Supported by the National Water Pollution Control and Harnessing Projects (2009ZX07423-003).

Investigation on the Key Factors and the Solution for pH Value Decrease in Carbon Filter in O₃-BAC Process

LU Shaoming, CHEN Jiangling, LI Fang

College of Environmental Science & Engineering, South China University of Technology, Guangzhou 510006, China

Received:2012-10-25 Revised:2013-02-01 Online:2013-08-28 Published:2013-08-24
Supported by:
Supported by the National Water Pollution Control and Harnessing Projects (2009ZX07423-003).

摘要/Abstract

摘要： An investigation was carried out to eliminate the decrease of effluent pH value in carbon filter in O₃-biological activated carbon process. The influence factors were examined in a pilot test, and pH was adjusted in the pilot and waterworks. Results show that the carbon filter is an acid-base buffer system and the activated carbon is the key factor. Chemical functional groups on activated carbon surface present acid-base properties to buffer the water but decrease with time, so that effluent pH value decreases. The effects of ozone dosage, CO₂ in the carbon filter, and the filter influent quality are negligible. A new method to adjust pH is developed: the activated carbon is first modified by soaking in sodium hydroxide solution to make its pH reach the desired value, and then the pH value of inflow is controlled to certain value by dosing lime in sand filter influent. The method is economical and effective.

关键词: pH, carbon filter, activated carbon, surface functional groups, modification

Abstract: An investigation was carried out to eliminate the decrease of effluent pH value in carbon filter in O₃-biological activated carbon process. The influence factors were examined in a pilot test, and pH was adjusted in the pilot and waterworks. Results show that the carbon filter is an acid-base buffer system and the activated carbon is the key factor. Chemical functional groups on activated carbon surface present acid-base properties to buffer the water but decrease with time, so that effluent pH value decreases. The effects of ozone dosage, CO₂ in the carbon filter, and the filter influent quality are negligible. A new method to adjust pH is developed: the activated carbon is first modified by soaking in sodium hydroxide solution to make its pH reach the desired value, and then the pH value of inflow is controlled to certain value by dosing lime in sand filter influent. The method is economical and effective.

Key words: pH, carbon filter, activated carbon, surface functional groups, modification

陆少鸣, 陈江玲, 李芳. Investigation on the Key Factors and the Solution for pH Value Decrease in Carbon Filter in O₃-BAC Process[J]. Chinese Journal of Chemical Engineering, 2013, 21(8): 914-919.

LU Shaoming, CHEN Jiangling, LI Fang. Investigation on the Key Factors and the Solution for pH Value Decrease in Carbon Filter in O₃-BAC Process[J]. Chin.J.Chem.Eng., 2013, 21(8): 914-919.

参考文献

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Investigation on the Key Factors and the Solution for pH Value Decrease in Carbon Filter in O₃-BAC Process

Investigation on the Key Factors and the Solution for pH Value Decrease in Carbon Filter in O₃-BAC Process

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