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Relationships between extractable copper, soil properties and copper uptake by wild plants in vineyard soils
1998
Brun, Laurent | Maillet, J. | Richarte, J. | Herrmann, Patrick | Rémy, J.C. | Biologie et Génétique des Interactions Plante-Parasite (UMR BGPI) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Unité de Science du Sol ; Institut National de la Recherche Agronomique (INRA)
International audience
Show more [+] Less [-]The mass budget of atmospheric ammonia in woodland within 1 km of livestock buildings
1998
Fowler, D. | Pitcairn, C.E.R. | Sutton, Mark | Flechard, C. | Loubet, Benjamin | Coyle, M. | Munro, R.C. | Unité de recherches en bioclimatologie ; Institut National de la Recherche Agronomique (INRA)
International audience
Show more [+] Less [-]Competitive sorption of heavy metal by soils. Isotherms and fractional factorial experiments
1998
Echevarria, Guillaume | Morera, M.T. | Mazkiaran, C. | Garrido, J.J. | Laboratoire Sols et Environnement (LSE) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Universidad Pública de Navarra [Espagne] = Public University of Navarra (UPNA)
Competing ions strongly affect heavy metal sorption onto the solid surfaces of soil. This study evaluated competitive sorption of Cd, Cu, Ni, Pb and Zn on three soils: Calcixerollic Xerochrept, Paralithic Xerorthent and Lithic Haplumbrept. Monometal and competitive sorption isotherms were obtained at 25°C. The individual effect of ions on retention of the others was ascertained by a fractional factorial analysis design. Most of the sorption isotherms belonged to type L subtype 2 in the classification of Giles. In competitive sorption the initial linear part was shorter and the knee sharper when compared with monometal sorption isotherms. Parameters related to sorptive capacity, such as Point B, Langmuir monolayer and Freundlich distribution coefficient, were higher in monometal than in competitive sorption, and in basic soils than in acidic soil. Calcium desorbed at different points of the sorption isotherms indicated that cationic exchange with Ca was the main retention mechanism in calcareous soils. For Pb, the ratio Ca desorbed/Pb sorbed was close to one; for Cu, Ni and Zn the ratio ranged from 1.20 to 1.37, probably due to partial dissolution of calcium carbonates by hydrolytic processes during retention. On the other hand, Cd had a ratio around 0.6 reflecting another additional retention mechanism, probably surface complexation. Fractional factorial design confirmed that the presence of the cations investigated reduced the amount of the five metals retained, but the presence of Cu and Pb in the system depressed Ni, Cd and Zn sorption more than the inverse. Cation mobility was enhanced when equilibrium concentration increased and the effect was higher in Ca-saturated soils.
Show more [+] Less [-]Air pollution
1998
Wark, Kenneth | Warner, Cecil Francis | Davis, Wayne T.
Global policy on sustainable agriculture: a 2020 vision
2012 | 1998
Pinstrup-Andersen, Per; Pandya-Lorch, Rajul | http://orcid.org/0000-0003-3552-7382 Pandya-Lorch, Rajul;
Non-PR | IFPRI4; 2020 | DGO
Show more [+] Less [-]Indoor pollution
1998
Miller, E. Willard (Eugene Willard) | Miller, Ruby M.
Discusses the health hazards of indoor air contaminants and includes information on their sources, the illnesses they can cause, the ways of controlling them, and other related topics.
Show more [+] Less [-]Agricultural pesticide residues in oysters and water from two Chesapeake Bay tributaries
1998
Lehotay, S.J. | Harman-Fetcho, J.A. | McConnell, L.L.
Little is known of the impact of agricultural activity on oysters in Chesapeake Bay tributaries. As a preliminary assessment of pesticide residues in oyster tissues, this study monitored more than 60 pesticides in oysters and overlying water in two tributaries of the Chesapeake Bay. Paired water and oyster samples were collected throughout 1997 from the Patuxent and Choptank Rivers which discharge into opposite shores of the Chesapeake Bay in Maryland. In water, herbicides such as atrazine, simazine, cyanazine, and metolachlor were present throughout the year with individual water concentrations peaking as high as 430 ng/1 in the late spring and summer and subsiding in the fall. These herbicides were not detected in the oysters even when concentrations were highest in the water. Another herbicide, trifluralin, was detected throughout the year at concentrations of less than 0.6 ng/1 and 0.4 ng/g (wet weight) in water and oyster samples, respectively. Several insecticides, such as endosulfans I and II, endosulfan sulfate, chlorpyrifos, α- and γ-HCH, p,p'-DDE, o,p'-DDT, trans-nonachlor, and trans-chlordane were also measured in both oysters and water at low concentrations.
Show more [+] Less [-]A comprehensive evaluation on the use of oxygen release compound in bioremediation [ORC]
1998
Koenigsberg, S.S.
Danish and US experience on the use of oxygen release compound (ORC)
1998
Gobins, J.
Biological transformation of phenols in a sandstone aquifer
1998
Broholm, M.M. | Arvin, E. (Danmarks Tekniske Univ., Lyngby (Denmark))