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Spatial Patterns Of Mercury In Atmospheric Deposition, Soils And Lake Biota In The Adirondack Park, New York, Xue Yu
Civil and Environmental Engineering - Dissertations
Mercury (Hg), as a trace element cycling in the environment, poses a serious health threat to both humans and wildlife due to its toxicity. Atmospheric deposition is the main source of Hg to most remote environments. The Adirondack Park in New York State of the United States receives moderate Hg deposition, and is a region characterized by relatively high concentrations of Hg in the terrestrial and especially aquatic biota. It is important to understand the mechanisms that contribute to the sensitivity of this region to Hg inputs. In my research, studies of the spatial patterns of Hg in atmospheric deposition, …
Effects Of Calcium Addition On Structure And Bioavailability Of Soil Organic Matter, Ankit Balaria
Effects Of Calcium Addition On Structure And Bioavailability Of Soil Organic Matter, Ankit Balaria
Civil and Environmental Engineering - Dissertations
The northeastern USA has a long history of acid rain, which has impacted soil fertility and raised concerns about the sustainability of the forests in the region. To facilitate recovery of these forests, calcium addition, in the form of wollastonite, was evaluated as a remedial tool at Hubbard Brook Experimental Forests in New Hampshire, USA. In order to study the effects of these amendments on soil organic matter and soil microbes, I characterized the structural chemistry of soil organic matter (SOM) and its hot-water extractable organic matter (HWEOM) fraction for Hubbard Brook soils and studied the changes in the structure …