The interplay between atmospheric deposition and soil dynamics of mercury in Swiss and Chinese boreal forests: A comparison study

Chen, Chaoyue and Huang, Jen-How and Meusburger, Katrin and Li, Kai and Fu, Xuewu and Rinklebe, Jorg and Alewell, Christine and Feng, Xinbin. (2022) The interplay between atmospheric deposition and soil dynamics of mercury in Swiss and Chinese boreal forests: A comparison study. Environmental Pollution (307). p. 119483.

Full text not available from this repository.

Official URL: https://edoc.unibas.ch/93020/

Downloads: Statistics Overview


Taking advantage of the different histories of Hg deposition in Davos Seehornwald in E-Switzerland and Changbai Mountain in NE-China, the influence of atmospheric deposition on Hg soil dynamics in forest soil profiles was investigated. Today, Hg fluxes in bulk precipitation were similar, and soil profiles were generally sinks for atmospherically deposited Hg at both sites. Noticeably, a net release of 2.07 mu g Hg m(-2) yr(-1) from the Bs horizon (Podzol) in Seehornwald was highlighted, where Hg concentration (up to 73.9 mu g kg(-1)) and soil storage (100 mg m(-3)) peaked. Sequential extraction revealed that organic matter and crystalline Fe and Al hydr (oxide) associated Hg decreased in the E horizon but increased in the Bs horizon as compared to the Ah horizon, demonstrating the coupling of Hg dynamics with the podzolisation process and accumulation of legacy Hg deposited last century in the Bs horizon. The mor humus in Seehornwald allowed Hg enrichment in the forest floor (182-269 mu g kg(-1)). In Changbai Mountain, the Hg concentrations in the Cambisol surface layer with mull humus were markedly lower (< 148 mu g kg(-1)), but with much higher Hg soil storage (54-120 mg m(-3)) than in the Seehornwald forest floor (18-27 mg m(-3)). Thus, the vertical distribution pattern of Hg was influenced by humus form and soil type. The concentrations of Hg in soil porewater in Seehornwald (3.4-101 ng L-1) and in runoff of Changbai Mountain (1.26-5.62 ng (-1)) were all low. Moreover, the pools of readily extractable Hg in the soils at both sites were all < 2% of total Hg. Therefore, the potential of Hg release from the forest soil profile to the adjacent aquatic environment is currently low at both sites.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Umweltgeowissenschaften (Alewell)
UniBasel Contributors:Alewell, Christine
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:02 Feb 2023 09:52
Deposited On:02 Feb 2023 09:52

Repository Staff Only: item control page