Quantifying the effect of humic matter on the emission of mercury from artificial soil surfaces |
| |
Authors: | Conrad Mauclair Julie Layshock Anthony Carpi |
| |
Institution: | 1. John Jay College, The City University of New York, 445 West 59th Street, New York, NY 10019, USA;2. Oregon State University, 1007 Agriculture and Life Sciences Building, Corvallis, OR 97331, USA |
| |
Abstract: | A set of surface samples was created using purified laboratory grade sand treated with 0.05 μg/g Hg as the HgCl2 salt and various concentrations of purified humic and fulvic acids. Emissions of elemental Hg from these substrates to the atmosphere were inversely correlated with the organic content of the samples (99% confidence level). The greatest differences in Hg emissions were found between samples containing the lowest concentrations of humic matter (0% versus 0.01% humic, and 0.01% versus 0.1% humic), only small differences in Hg flux were found to exist for samples with higher concentrations of humic acid (1%, 5%, and 100%). This effect was independent of the type of humic substance used, with both humic and fulvic acids showing an inhibitory effect on surface Hg emissions. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|