干旱区生态环境知识资源中心(Arid): Characteristics of the presence and migration patterns of DOM between ice and water in the cold and arid Daihai Lake

Arid

DOI	10.1016/j.scitotenv.2024.170876
	Characteristics of the presence and migration patterns of DOM between ice and water in the cold and arid Daihai Lake
	Pan, Ting; Zhang, Yimeng; Yang, Fang; Liao, Haiqing; Feng, Weiying; Sun, Fuhong; Jiang, Weilong; Wang, Qianqian; Ji, Meichen; Yang, Chenglei; Lepparanta, Matti
通讯作者	Yang, F ; Liao, HQ
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	920
英文摘要	Seasonal ice cover plays a crucial role in shaping the physical characteristics of lakes in cold and arid regions. Moreover, the ice significantly affects the level and quality of dissolved organic matter (DOM) in the water column. We utilized spectroscopy and mass spectrometry to analyze the molecular composition and distribution of DOM in ice cores and under-ice water in Daihai Lake. We identified the main environmental factors affecting DOM migration through structural equation modelling (SEM). The freezing process created a repulsive effect on DOM, with water samples demonstrating a greater DOM content than ice. The dominant part of the DOM in the ice cores was mainly comprised of protein-like materials (71.45 %), whereas water consisted of humus-like materials (54.81 %). The average molecular weight of the ice cover DOM (m/z = 396.77) was smaller than in the under-ice water (m/z = 405.42). While low-molecular and low-aromatic protein-like material tended to be trapped in the ice layer during ice formation, large-molecular and highly aromatic humic substances were more easily expelled into the water. Interestingly, condensed aromatic hydrocarbons were found to occur less frequently in the ice phase (11 %) compared to the aqueous phase (13 %). Both the lipid and protein/aliphatic compound structures exhibited slightly higher ratios in the ice (6 % and 8 %, respectively) than in water (1 % and 5 %, respectively). SEM between the ice cover environment and DOM indicated that the ice can influence the distribution pattern of DOM through the regulation of internal solute factors and other chemicals. The nature of the DOM and the rate of ice growth also play critical roles in determining the distribution mechanism of DOM for ice and water. The pollutant distribution characteristics and migration patterns between ice and water are essential for comprehending environmental water pollution and promoting pollution management and protection measures in cold region lakes.
英文关键词	Frozen period Dissolved organic matter Three-dimensional excitation -emission matrix FT-ICR MS
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001199869700001
WOS关键词	DISSOLVED ORGANIC-MATTER ; RESOLUTION MASS-SPECTROMETRY ; PARALLEL FACTOR-ANALYSIS ; MOLECULAR CHARACTERIZATION ; SEA-ICE ; CARBON ; FLUORESCENCE ; SPECTROSCOPY ; EXCLUSION ; DEPTH
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405472
推荐引用方式 GB/T 7714	Pan, Ting,Zhang, Yimeng,Yang, Fang,et al. Characteristics of the presence and migration patterns of DOM between ice and water in the cold and arid Daihai Lake[J],2024,920.
APA	Pan, Ting.,Zhang, Yimeng.,Yang, Fang.,Liao, Haiqing.,Feng, Weiying.,...&Lepparanta, Matti.(2024).Characteristics of the presence and migration patterns of DOM between ice and water in the cold and arid Daihai Lake.SCIENCE OF THE TOTAL ENVIRONMENT,920.
MLA	Pan, Ting,et al."Characteristics of the presence and migration patterns of DOM between ice and water in the cold and arid Daihai Lake".SCIENCE OF THE TOTAL ENVIRONMENT 920(2024).