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The Global Exposure of Forests to Air Pollutants
1999
Fowler, David | Cape, J. Neil | Coyle, Mhairi | Flechard, Chris, | Kuylenstierna, Johan | Hicks, Kevin | Derwent, Dick | Johnson, Colin
Heavy metals, organochlorines and polycyclic aromatic hydrocarbons in sperm whales stranded in Southern North sea during the 1994/1995 winter,
1999
Hoolsbeek, L. | Joiris, C. R. | Debacker, Virginie | Rosse, P. | Nellissen, J. P. | Gobert, Sylvie | Bouquegneau, Jean-Marie | Bossicart, M.
peer reviewed
Show more [+] Less [-]Mutual effects of soil organic matter dynamics and heavy metals fate in a metallophyte grassland
1999
Balabane, May | Faivre, D. | van Oort, Folkert, F. | Dahmani-Muller, H. | Unité de recherche Science du Sol (USS) ; Institut National de la Recherche Agronomique (INRA)
International audience
Show more [+] Less [-]Evaluation of hydroxyapatite as a metal immobilizing soil additive for the remediation of polluted soils. Part 1. Influence of hydroxyapatite on metal exchangeability in soil, plant growth and plant metal accumulation
1999
Boisson, J. | Ruttens, A. | Mench, Michel | Vangronsveld, J. | Unité d'agronomie ; Institut National de la Recherche Agronomique (INRA)
International audience
Show more [+] Less [-]Impacts of (NH4)2SO4 deposition on Norway spruce (Picea abies [L.] Karst) roots
1999
Carnol, Monique | Cudlin, Pavel | Ineson, Phil
peer reviewed | The effects of enhanced (NH4)(2)SO4 (NS) deposition on Norway spruce (Picea abies [L.] Karst) fine root biomass, vitality and chemistry were investigated using root-free in-growth cores reproducing native organic and mineral soil horizons. The cores were covered and watered every 2 weeks with native throughfall or throughfall supplemented with NS to increase deposition by 75 kg ha(-1) a(-1) NH4+-N (86 kg ha(-1) a(-1) SO42--S). The in-growth cores were sampled after 19 months and assessed for root biomass, necromass, length, tip number, tip vitality and fine root chemistry. Root biomass and fine root aluminium (Al) concentration were negatively correlated, but NS deposition had no effect on root growth or root tip vitality. NS deposition caused increased fine root nitrogen (N) concentrations in the organic horizon and increased Calcium (Ca) concentrations in the mineral horizon. Fine root biomass was higher in the organic horizon, where fine root Al and potassium (K) concentrations were lower and Ca concentrations higher than in the mineral horizon. Results highlighted the importance of soil stratification on fine root growth and chemical composition.
Show more [+] Less [-]Wastewater characterization: evaluation of a bio-chemical method and preliminary results
1999
Stricker, Anne Emmanuelle | Heduit, A. | Lessard, P.
This paper presents some preliminary results on the implementation of a biodegradability batch test to fraction different types of wastewater samples to assess the variability of the WWTP influent composition.
Show more [+] Less [-]Factors Affecting Microbial Degradation of Polycyclic Aromatic Hydrocarbon Phenanthrene in the Caribbean Coastal Water
1999
Zaidi, B.R. | Imam, S.H.
Studies were conducted to assess factors that may influence the rate and extent of biodegradation of polyaromatic hydrocarbons (PAHs) in waters of Guayanilla Bay (latitude, 18°N; longitude, 66.45°W) Puerto Rico. Phenanthrene was used as a model PAHs compound. Both the rate and extent of phenanthrene degradation by natural microbial flora present in seawater samples from Guayanilla Bay were quite slow. Addition of KNO3 as a source of inorganic nitrogen (N) resulted in a 10-fold increase in the rate of phenanthrene degradation within a 125 h period, whereas, addition of K2HPO4 as a source of inorganic nutrient phosphorus (P) had no effect. Phenanthrene degradation was strongly inhibited when seawater pH was adjusted to 10.0. Phenanthrene in seawater samples degraded rapidly when first pretreated with hydrogen peroxide (H2O2) and then inoculated with a known indigenous phenanthrene degrading bacterium, Alteromonas sp. Pretreatment of phenanthrene with Triton-x-100 had little or no effect on its degradation by the same bacteria, whereas, degradation in samples preheated at 60°C was somewhat inhibited.
Show more [+] Less [-]The measurement of exposure to air pollution: concepts, methods and stakes | [La mesure de l'exposition a la pollution atmospherique: concepts, methodes et interet]
1999
Brunekreef, B. (Wageningen University and Research Centre (Pays Bas). Department of Environmental Sciences, Environmental and Occupational Health Group)
Storm water pollution control
1999
Dodson, Roy D.
Throughfall deposition of nitrogen and sulfur in a Jeffrey pine forest in the San Gabriel Mountains, southern California
1999
Fenn, M.E. | Kiefer, J.W. (US Department of Agriculture, Forest Service, Pacific Southwest Research Station, Forest Fire Laboratory, 4955 Canyon Crest Drive, Riverside, CA 92507 (USA))