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Tracing the Uptake, Transport, and Fate of Mercury in Sawgrass (Cladium jamaicense) in the Florida Everglades Using a Multi-isotope Technique
Bo Meng;  Yanbin Li;  Wenbin Cui;  Ping Jiang;  Guangliang Liu;  Yongmin Wang;  Jennifer Richards;  Xinbin Feng;  Yong Cai
2018
Source PublicationEnvironmental Science & Technology
Volume52Issue:6Pages:3384-3391
Abstract

The role of macrophytes in the biogeochemical cycle of mercury (Hg) in the Florida Everglades is poorly understood. Stable isotope tracer techniques were employed to investigate Hg uptake by sawgrass (Cladium jamaicense) from soil and atmospheric pathways and the fate of Hg after absorption. Our results suggest that soil spiked Hg-201(2+) was rapidly taken up by roots and transported to aboveground parts. The spiked Hg-201 that was transported to the aboveground parts was trapped; no release of the spiked Hg-201 from the leaf to the air was detected. Atmospheric Hg-199(0) exposure experiments revealed that the majority of the previously deposited Hg-199(0) taken into the leaf was fixed, with a very limited proportion (1.6%) available for re-emission to the atmosphere. The percentage of Hg-199(0) fixed in the leaf will help reduce the model uncertainty in estimating the Hg exchange over the air vegetation surface. We propose that sawgrass needs to be viewed as an important sink for atmospheric Hg in the regional Hg mass balance; this would have important implications for the critical loads of Hg to the Everglades. The multi-isotope tracer technique could be an effective tool to identify the role of plants in biogeochemical cycling of Hg in other ecosystems.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8717
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, P. R. China
2.Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
3.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
4.Southeast Environmental Research Center, Florida International University, Miami, Florida 33199, United States
5.Department of Biological Science, Florida International University, Miami, Florida 33199, United States
Recommended Citation
GB/T 7714
Bo Meng;Yanbin Li;Wenbin Cui;Ping Jiang;Guangliang Liu;Yongmin Wang;Jennifer Richards;Xinbin Feng;Yong Cai. Tracing the Uptake, Transport, and Fate of Mercury in Sawgrass (Cladium jamaicense) in the Florida Everglades Using a Multi-isotope Technique[J]. Environmental Science & Technology,2018,52(6):3384-3391.
APA Bo Meng;Yanbin Li;Wenbin Cui;Ping Jiang;Guangliang Liu;Yongmin Wang;Jennifer Richards;Xinbin Feng;Yong Cai.(2018).Tracing the Uptake, Transport, and Fate of Mercury in Sawgrass (Cladium jamaicense) in the Florida Everglades Using a Multi-isotope Technique.Environmental Science & Technology,52(6),3384-3391.
MLA Bo Meng;Yanbin Li;Wenbin Cui;Ping Jiang;Guangliang Liu;Yongmin Wang;Jennifer Richards;Xinbin Feng;Yong Cai."Tracing the Uptake, Transport, and Fate of Mercury in Sawgrass (Cladium jamaicense) in the Florida Everglades Using a Multi-isotope Technique".Environmental Science & Technology 52.6(2018):3384-3391.
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