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Forest Floor Leachate Biogeochemistry And Decomposition Dynamics, William S. Currie
Forest Floor Leachate Biogeochemistry And Decomposition Dynamics, William S. Currie
Doctoral Dissertations
Forest floor biogeochemistry was studied in combined field and modeling research in ecosystems representative of forests of the Northeastern U.S. The field study, conducted at the Harvard Forest, MA, focused on changes to organic and inorganic chemistry of forest-floor leachate under experimentally elevated N inputs meant to simulate effects of acid deposition in the region.
Concentrations of dissolved organic carbon and nitrogen (DOC and DON) increased substantially in N treatments in the first year of the study. I attributed this to an increase in production of soluble organics in the forest floor due to an interaction between increased N availability …
Radiatively Active Trace Gas Emissions From Waste Management Systems, Peter Matthew Czepiel
Radiatively Active Trace Gas Emissions From Waste Management Systems, Peter Matthew Czepiel
Doctoral Dissertations
Current waste management practices present significant potential for emissions of radiatively active trace gases to the atmosphere. This dissertation describes the quantitative assessment of nitrous oxide (N$\sb2$O) emissions from liquid waste and residuals treatment, emissions of methane (CH$\sb4$) from landfills, and the effects of microbial oxidation on landfill CH$\sb4$ emissions.
N$\sb2$O emissions were measured from liquid treatment process at a wastewater treatment plant where the highest emissions occurred during secondary aeration. Emission factors derived from the measurements included 3.2 g N$\sb2$O person$\sp{-1}$ year$\sp{-1}$ and $1.6\times10\sp{-6}$ g N$\sb2$O (liter wastewater$\sp{-1}$). The potential for N$\sb2$O emissions from the composting of the residual …