Effects of Assimilable Organic Carbon and Free Chlorine on Bacterial Growth in Drinking Water

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Effects of Assimilable Organic Carbon and Free Chlorine on Bacterial Growth in Drinking Water
	Liu, Xiaolu; Wang, Jingqi; Liu, Tingting; Kong, Weiwen; He, Xiaoqing; Jin, Yi; Zhang, Bolin
刊名	PLOS ONE
	2015-06-02
卷号	10 期号:6 页码:-
英文摘要	Assimilable organic carbon (AOC) is one of the most important factors affecting the re-growth of microorganisms in drinking water. High AOC concentrations result in biological instability, but disinfection kills microbes to ensure the safety of drinking water. Free chlorine is an important oxidizing agent used during the disinfection process. Therefore, we explored the combined effects of AOC and free chlorine on bacterial growth in drinking water using flow cytometry (FCM). The initial AOC concentration was 168 mu g.L-1 in all water samples. Without free chlorine, the concentrations of intact bacteria increased but the level of AOC decreased. The addition of sodium hypochlorite caused an increase and fluctuation in AOC due to the oxidation of organic carbon. The concentrations of intact bacteria decreased from 1.1x10(5) cells. mL(-1) to 2.6x10(4) cells. mL(-1) at an initial free chlorine dose of 0.6 mg. L-1 to 4.8x10(4) cells. mL(-1) at an initial free chlorine dose of 0.3 mg.L-1 due to free chlorine originating from sodium hypochlorite. Additionally, free chlorine might be more obviously affected AOC concentrations than microbial growth did. These results suggested that AOC and free chlorine might have combined effects on microbial growth. In this study, our results showed concentrations determined by FCM were higher than those by HPC, which indicated that some E. coli detected by FCM might not be detected using HPC in drinking water. The level of free chlorine might restrain the consumption of AOC by inhibiting the growth of E. coli; on the other hand, chlorination might increase the level of AOC, thereby increase the potential for microbial growth in the drinking water network.
研究领域[WOS]	Multidisciplinary Sciences
WOS记录号	WOS:000355699100051
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32561]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Liu, Xiaolu,Wang, Jingqi,Liu, Tingting,et al. Effects of Assimilable Organic Carbon and Free Chlorine on Bacterial Growth in Drinking Water[J]. PLOS ONE,2015,10(6):-.
APA	Liu, Xiaolu.,Wang, Jingqi.,Liu, Tingting.,Kong, Weiwen.,He, Xiaoqing.,...&Zhang, Bolin.(2015).Effects of Assimilable Organic Carbon and Free Chlorine on Bacterial Growth in Drinking Water.PLOS ONE,10(6),-.
MLA	Liu, Xiaolu,et al."Effects of Assimilable Organic Carbon and Free Chlorine on Bacterial Growth in Drinking Water".PLOS ONE 10.6(2015):-.