Search results for "VDP::Mathematics and natural science: 400::Chemistry: 440::Environmental chemistry"
showing 3 items of 3 documents
New insights into the surface functionalities and adsorption evolution of water molecules on silica gel surface: A study by second derivative near in…
2010
Accepted version of an article in the journal: Vibrational Spectroscopy. Published version available on Science Direct: http://dx.doi.org/10.1016/j.vibspec.2010.06.003 Surface functionalities and adsorption evolution of water molecules on silica gel samples were studied by second derivative near infrared spectroscopy. Four different silica gel samples with varying surface area were used in this experiment. Each of the dry samples was allowed to equilibrate with surrounding air and the near infrared spectra were accumulated at different time intervals using reflectance technique. The evolved spectra were analysed using second derivative technique to study the adsorption evolution of water mo…
The Fate of Phthalates in Surface Waters During Humus Removal by Precipitation
2010
Published version of an article from the journal:International Journal of Arts and Sciences. Also available from the publisher:http://www.openaccesslibrary.org/images/XEW117_Alfred_A._Christy_I_.pdf. Open Access Phthalates are esters of aromatic 1,2 di-carboxylic acids and are widely found in surface waters and their removal is necessary because of their effects on human health. Humic material in water can adsorb phthalates and may be precipitated along with phthalates. The fate of phthalates in surface waters during humus removal by precipitation has been investigated in the laboratory with well characterised humic substances from the ?NOM typing project? (Natural Organic Matter typing pro…
Water Chemistry in the Confluence Zone Downstream a Limestone Treated Lake and an Acid Tributary: Principal Component Analyses Including Warm and Col…
2010
Published version of an article from the journal:International Journal of Arts and Sciences. Also available from the publisher: http://www.openaccesslibrary.org/images/XEW244_Alfred_A._Christy_II_.pdf. Open Access Extensive limestone treatment of lakes and watercourses has been carried out especially in Norway and Sweden to counteract effects of acidification. Lakes have been the most commonly treated part of the water systems. However, treatment of lakes upstream acid tributaries may introduce downstream toxic mixing zones for fish. To sort this out the outlet of a treated lake, a downstream acid tributary and two sites in the confluence zone were intensely monitored during a period of 28 …