Projecting competition between 2-methylisoborneol and natural organic matter in adsorption onto activated carbon from ozonated source waters

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Projecting competition between 2-methylisoborneol and natural organic matter in adsorption onto activated carbon from ozonated source waters
	Wang, Qi; Zietzschmann, Frederik; Yu, Jianwei; Hofman, Roberta; An, Wei; Yang, Min; Rietveld, Luuk C.
刊名	WATER RESEARCH
	2020-04-15
卷号	173 页码:1-14
关键词	Activated carbon Ozonation Competitive adsorption Natural organic matter MIB
ISSN号	0043-1354
英文摘要	Though the ozone-activated carbon process has been widely applied for drinking water purification, little is known about how ozone-modified natural organic matter (NOM) competes with micropollutants in activated carbon adsorption. In this study, three natural waters and one synthetic water (standard humics solution) with highly heterogeneous NOM compositions were employed to investigate the interference of ozonated NOM with the adsorption of 2-methylisoborneol (MIB). Analysis using liquid chromatography with online carbon and UV254 detection (LC-OCD-UVD) revealed that ozonation led to various disintegration patterns of macromolecules in NOM, and UV absorbance was reduced markedly for nearly all NOM fractions. Powdered activated carbon (PAC) adsorption experiments showed that increasing ozone consumption coincided with reducing NOM competition against MIB in the three natural waters, as expressed by the fitted initial concentrations of the equivalent background compound (c(0,EBC)). In the synthetic water, in contrast, competition increased under low/moderate specific ozone consumptions and then decreased with further elevation of ozone consumptions. Regarding the significance on affecting ozonated NOM interference, aromaticity reduction outweighed formation of low molecular weight (LMW) organics in most cases, enhancing MIB adsorption capacity. However, disintegration of the humics fraction with larger molecular weight (1,103 g/mol, as compared to 546-697 g/mol in three natural waters) into smaller, more competitive fractions caused the observed initial deteriorated MIB adsorption in synthetic water. A superior correlation between c(0,EBC) and the UV absorbance of LMW organics (R-2 = 0.93) over concentrations of LMW organics underlined the importance of the aromatic properties in competitive adsorption projection for ozone pretreated natural waters. Furthermore, the change of relative concentration of UV absorbing compounds during ozonation could help estimate the decrease of c(0,EBC), which could be a promising tool for waterworks to adjust PAC doses for MIB removal in ozonated waters. (c) 2020 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45347]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
推荐引用方式 GB/T 7714	Wang, Qi,Zietzschmann, Frederik,Yu, Jianwei,et al. Projecting competition between 2-methylisoborneol and natural organic matter in adsorption onto activated carbon from ozonated source waters[J]. WATER RESEARCH,2020,173:1-14.
APA	Wang, Qi.,Zietzschmann, Frederik.,Yu, Jianwei.,Hofman, Roberta.,An, Wei.,...&Rietveld, Luuk C..(2020).Projecting competition between 2-methylisoborneol and natural organic matter in adsorption onto activated carbon from ozonated source waters.WATER RESEARCH,173,1-14.
MLA	Wang, Qi,et al."Projecting competition between 2-methylisoborneol and natural organic matter in adsorption onto activated carbon from ozonated source waters".WATER RESEARCH 173(2020):1-14.