干旱区生态环境知识资源中心(Arid): Natural Formation of Chloro- and Bromoacetone in Salt Lakes of Western Australia

Arid

DOI	10.3390/atmos10110663
	Natural Formation of Chloro- and Bromoacetone in Salt Lakes of Western Australia
	Sattler, Tobias 1,2; Soergel, Matthias 2,3; Wittmer, Julian 4; Bourtsoukidis, Efstratios 2; Krause, Torsten 1; Atlas, Elliot 5; Benk, Simon 1,6; Bleicher, Sergej 4; Kamilli, Katharina 4; Ofner, Johannes 4; Kopetzky, Raimo 3,7; Held, Andreas 4,8,9; Palm, Wolf-Ulrich 3; Williams, Jonathan 2; Zetzsch, Cornelius 2,4,9; Schoeler, Heinz-Friedrich 1
通讯作者	Sattler, Tobias
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2019
卷号	10 期号:11
英文摘要	Western Australia is a semi-/arid region known for saline lakes with a wide range of geochemical parameters (pH 2.5-7.1, Cl- 10-200 g L-1). This study reports on the haloacetones chloro- and bromoacetone in air over 6 salt lake shorelines. Significant emissions of chloroacetone (up to 0.2 mu mol m(-2) h(-1)) and bromoacetone (up to 1. 5 mu mol m(-2) h(-1)) were detected, and a photochemical box model was employed to evaluate the contribution of their atmospheric formation from the olefinic hydrocarbons propene and methacrolein in the gas phase. The measured concentrations could not explain the photochemical halogenation reaction, indicating a strong hitherto unknown source of haloacetones. Aqueous-phase reactions of haloacetones, investigated in the laboratory using humic acid in concentrated salt solutions, were identified as alternative formation pathway by liquid-phase reactions, acid catalyzed enolization of ketones, and subsequent halogenation. In order to verify this mechanism, we made measurements of the Henry's law constants, rate constants for hydrolysis and nucleophilic exchange with chloride, UV-spectra and quantum yields for the photolysis of bromoacetone and 1,1-dibromoacetone in the aqueous phase. We suggest that heterogeneous processes induced by humic substances in the quasi-liquid layer of the salt crust, particle surfaces and the lake water are the predominating pathways for the formation of the observed haloacetones.
英文关键词	chloroacetone (1-chloropropan-2-one) bromoacetone (1-bromopropan-2-one) salt lakes natural halogenation
类型	Article
语种	英语
国家	Germany ; USA
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000502272000025
WOS关键词	PARTICLE FORMATION ; CARBONYL-COMPOUNDS ; ORGANIC-COMPOUNDS ; RATE COEFFICIENTS ; HUMIC SUBSTANCES ; MOLECULAR-WEIGHT ; ATOMIC CHLORINE ; RATE CONSTANTS ; YILGARN BLOCK ; OH RADICALS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310534
作者单位	1.Heidelberg Univ, Inst Earth Sci, D-69120 Heidelberg, Germany; 2.Max Planck Inst Chem, D-55128 Mainz, Germany; 3.Univ Luneburg, Inst Sustainable & Environm Chem, D-21335 Luneburg, Germany; 4.Univ Bayreuth, Atmospher Chem, D-95447 Bayreuth, Germany; 5.Univ Miami, RSMAS, Marine & Atmospher Chem, Coral Gables, FL 33149 USA; 6.Max Planck Inst Biogeochem, D-07745 Jena, Germany; 7.Helmholtz Ctr, Inst Coastal Res, D-215022 Geesthacht, Germany; 8.Tech Univ Berlin, Environm Chem & Air Res, D-10623 Berlin, Germany; 9.Univ Bayreuth, Bayreuth Ctr Ecol & Environm Res, D-95447 Bayreuth, Germany
推荐引用方式 GB/T 7714	Sattler, Tobias,Soergel, Matthias,Wittmer, Julian,et al. Natural Formation of Chloro- and Bromoacetone in Salt Lakes of Western Australia[J],2019,10(11).
APA	Sattler, Tobias.,Soergel, Matthias.,Wittmer, Julian.,Bourtsoukidis, Efstratios.,Krause, Torsten.,...&Schoeler, Heinz-Friedrich.(2019).Natural Formation of Chloro- and Bromoacetone in Salt Lakes of Western Australia.ATMOSPHERE,10(11).
MLA	Sattler, Tobias,et al."Natural Formation of Chloro- and Bromoacetone in Salt Lakes of Western Australia".ATMOSPHERE 10.11(2019).