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A global overview of the long-term effects of air pollution on forest trees and ecosystems
2002
Bastrup-Birk, A. (Centre of Forest, Landscape and Planning, Hoersholm (Denmark)) | Kozlov, M. | Thienhoven, M. van
This paper aims to integrate existing information on effects of air pollution on main forest tree species of economic importance, mainly on growth and reproduction. Gaps in knowledge and areas for future research will be identified
Показать больше [+] Меньше [-]Diagnosis of pollution effect on Slovak forest ecosystems
2002
Mankovska, B. (Forest Research Institute, Zvolen (Slovak Republic))
Presented paper based on long-term and systematic research of the negative effect of pollutants and of the content of the elements in particular parts of forest environment (the years 1965/2002) proves of the importance, need and justificatin of the research on given subject. Knowing the elemental composition of pollutants as to its quality and quantity is basic precondition with diagnosing the effect of polluted air on forest environment. For the needs of practice three main pollution deposition types (acid, alkaline and ammonia) and 8 subtypes were established. They represent changes of forest ecosystems caused by different substances from pollutants
Показать больше [+] Меньше [-]Polyacrylamide preparations for protection of water quality threatened by agricultural runoff contaminants
2002
Entry, J.A. | Sojka, R.E. | Watwood, M. | Ross, C.
Waste streams associated with a variety of agricultural runoff sources are major contributors of nutrients, pesticides and enteric microorganisms to surface and ground waters. Water soluble anionic polyacrylamide (PAM) was found to be a highly effective erosion-preventing and infiltration-enhancing polymer, when applied at rates of 1-10 g m (super -3) in furrow irrigation water. Water flowing from PAM treated irrigation furrows show large reductions in sediment, nutrients and pesticides. Recently PAM and PAM+CaO and PAM+Al(SO (sub 4) ) (sub 3) mixtures have been shown to filter bacteria, fungi and nutrients from animal wastewater. Low concentrations of PAM [175-350 g PAM ha (super -1) as PAM or as PAM+CaO and PAM+Al(SO (sub 4) ) mixture] applied to the soil surface, resulted in dramatic decreases (10 fold) of total, coliform and fecal streptococci bacteria in cattle, fish and swine wastewater leachate and surface runoff. PAM treatment also filtered significant amounts of NH (sub 4) , PO (sub 4) and total P in cattle and swine wastewater. This points to the potential of developing PAM as a water quality protection measure in combination with large-scale animal feeding operations. Potential benefits of PAM treatment of animal facility waste streams include: (1) low cost, (2) easy and quick application, (3) suitability for use with other pollution reduction techniques. Research on the efficacy of PAM for removal of protozoan parasites and viruses and more thorough assessment of PAM degradation in different soils is still needed to completely evaluate PAM treatment as an effective waste water treatment. We will present analysis and feasibility of using PAM, PAM+Al(SO (sub 4) ) (sub 3) , and PAM+CaO application for specific applications. Our results demonstrate their potential efficacy in reducing sediment, nutrients and microorganisms from animal production facility effluents. Abstract
Показать больше [+] Меньше [-][Trials with combined chemical and biological filter for degradation of TCE in groundwater [trichlorethylene]]
2002
Soegaard, E.G. (Aalborg Univ., Esbjerg (Denmark)) | Christensen, S.R.
[Multielement mapping of metalloid pesticide residues in the soil of former plant nursery sites]
2002
Joergensen, N. | Laursen, J. (Kongelige Veterinaer- og Landbohoejskole, Copenhagen (Denmark)) | Pind, N. | Holm, P.E. | Viksna, A.