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	Aluminum speciation of coagulants with low concentration: Analysis by electrospray ionization mass spectrometry
	Zhao, He; Liu, Huijuan; Qu, Jiuhui
	2011
会议名称	6th International Conference on Interfaces Against Pollution (IAP 2010)
会议日期	MAY 16-19, 2010
会议地点	Beijing, PEOPLES R CHINA
关键词	Electrospray ionization Aluminum speciation Coagulant Hydrolyzed species
英文摘要	Aluminum speciation of coagulants with low concentration was investigated in detail by electrospray ionization mass spectrometry (ESI-MS). In particular, comparison with (27)Al nuclear magnetic resonance ((27)Al NMR) and Ferron colorimetric method for aluminum speciation of coagulants was discussed. The results indicated that various hydrolyzed aluminum species (monomeric, dimeric, trimeric and tetrameric aluminum species), which could not be identified by other methods, appeared in ESI-MS spectra. Thus. ESI-MS method was much better for hydrolyzed aluminum species in low concentration. In this paper. sample cone voltage was an important operating parameter during ESI-MS detection, and optimum voltage was 70V. Too low (40V) or high (150V) sample cone voltage was not suitable for detecting all aluminum species. This study also evaluated the effects of coagulant concentration, aging, pH value and organic matter on aluminum species distribution. The results indicated that the distribution of hydrolyzed aluminum species at low concentration was largely dependent on the solution pH. At higher pH conditions, aging (8-12h) may influence aluminum hydrolysis. Additionally, after adding salicylic acid into coagulant solutions. speciation and stability for both Al(13) species and aluminum-salicylate complexes varied significantly at different pH values. (C) 2010 Elsevier B.V. All rights reserved.
ISBN号	0927-7757
WOS记录号	WOS:000289920200009
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24625]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Zhao, He,Liu, Huijuan,Qu, Jiuhui. Aluminum speciation of coagulants with low concentration: Analysis by electrospray ionization mass spectrometry[C]. 见:6th International Conference on Interfaces Against Pollution (IAP 2010). Beijing, PEOPLES R CHINA. MAY 16-19, 2010.

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