干旱区生态环境知识资源中心(Arid): Ca2+ complexation of dissolved organic matter in arid inland lakes is significantly affected by drastic seasonal change of salinity

Arid

DOI	10.1016/j.scitotenv.2019.01.370
	Ca2+ complexation of dissolved organic matter in arid inland lakes is significantly affected by drastic seasonal change of salinity
	Zhang, Daoyong 1,3; Lin, Qinghua 2; Xue, Nana 3,4; Zhu, Pengfeng 1; Zhang, Fan 1; Ge, Chang 1; Ma, Chaojie 1; Pan, Xiangliang 1,3
通讯作者	Pan, Xiangliang
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	663 页码:479-485
英文摘要	CaCO3 precipitation is one of the most common and important geochemical processes in the arid inland waters and it can be significantly affected by interaction of DOM with Ca2+. Effects of the drastic seasonal change of water salinity on interaction of DOM with Ca2+ in the arid inland waters were completely unknown. In the present study, complexation of DOM with Ca2+ in the freshwater (0.5 parts per thousand salinity) and hypersaline water (70 parts per thousand salinity) were comparatively examined by excitation-emission matrix (EEM) fluorescence quenching titration and isothermal titration calorimetry (ITC). The complexation of DOM with Ca2+ was significantly influenced by the drastic change of salinity. The ITC complexation is exothermic at 0.5 parts per thousand salinity but turns to an endothermic process at 70 parts per thousand salinity. More energy is needed for the complex reaction between DOM and Ca2+ under the hypersaline condition than in the fresh water. Fluorescence quenching titration indicates that DOM has stronger binding ability toward Ca2+ in the freshwater than in the saline water, and more fractions of DOM in the freshwater are accessible to Ca2+ than in the saline water. Ca2+ complexation in the DOM is dominated by the tryptophan-like components at both salinities and the complexation of Ca2+ with fulvic acid-like components is ignorable. The findings is important for understanding the aquatic geochemical processes in some lakes that seriously affected by irrigation water use in the arid zone. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Binding constants Complexation Fluorescence quenching titration Isothermal titration calorimetry
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000459858500048
WOS关键词	EXTRACELLULAR POLYMERIC SUBSTANCES ; ISOTHERMAL TITRATION CALORIMETRY ; CALCITE CRYSTAL-GROWTH ; HUMIC ACIDS ; PRECIPITATION ; FLUORESCENCE ; BINDING ; INHIBITION ; EXCITATION ; KINETICS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218665
作者单位	1.Zhejiang Univ Technol, Coll Environm, Key Lab Microbial Technol Ind Pollut Control Zhej, Hangzhou 310014, Zhejiang, Peoples R China; 2.Jilin Univ, Coll New Energy & Environm, Minist Educ, Key Lab Groundwater Resources & Environm, Changchun 130021, Jilin, Peoples R China; 3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Environm Pollut & Bioremediat, Urumqi 830011, Peoples R China; 4.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Daoyong,Lin, Qinghua,Xue, Nana,et al. Ca2+ complexation of dissolved organic matter in arid inland lakes is significantly affected by drastic seasonal change of salinity[J]. 中国科学院新疆生态与地理研究所,2019,663:479-485.
APA	Zhang, Daoyong.,Lin, Qinghua.,Xue, Nana.,Zhu, Pengfeng.,Zhang, Fan.,...&Pan, Xiangliang.(2019).Ca2+ complexation of dissolved organic matter in arid inland lakes is significantly affected by drastic seasonal change of salinity.SCIENCE OF THE TOTAL ENVIRONMENT,663,479-485.
MLA	Zhang, Daoyong,et al."Ca2+ complexation of dissolved organic matter in arid inland lakes is significantly affected by drastic seasonal change of salinity".SCIENCE OF THE TOTAL ENVIRONMENT 663(2019):479-485.