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Resultados 1761-1770 de 62,398
Leaching characteristics of lignite ash [Groundwater contamination, coal gasification].
1983
Humenick M.J. | Lang M. | Jackson K.F.
Water pollution research in South Africa.
1979
Cillie G.G. | Coombs P. | Odendaal P.E.
Influent water pollution control for irrigated agriculture.
1979
Radosevich G.E. | Skogerboe G.V.
San-Diego-area agencies sign joint-powers pact to study [water] reclamation in practical terms [California].
1977
Elkins B.
Quantifying source and dynamics of acidic pollution in a coastal acid sulphate soil area Texto completo
2013
Phong, N.D. | To Phuc Tuong | Phu, N.D. | Nang, N.D. | Hoanh, Chu Thai
Quantifying source and dynamics of acidic pollution in a coastal acid sulphate soil area Texto completo
2013
Phong, N.D. | To Phuc Tuong | Phu, N.D. | Nang, N.D. | Hoanh, Chu Thai
The in-depth knowledge on management and reducing annual acidic pollution is important for improving the sustainable livelihood of people living in areas with acid sulphate soils (ASS). This study involved a long-term (2001-2006), large-scale canal water quality monitoring network (87 locations) and a field experiment at nine sites to quantify the dynamic variability of acidic pollution and its source in a coastal area with ASS in the Mekong River Delta of Vietnam. Widespread acidic pollution (pH <5) of surface water occurred at the beginning of the rainy season, while pH of the canal water remained high (7-8) at the end of the rainy season and during the dry season. The study identified canal embankment deposits, made of ASS spoils from canal dredging/excavation, as the main source of acidic pollution in the surrounding canal network. The findings suggested that there was a linkage between the amount of acidic loads into canal networks and the age of the embankment deposits. The most acute pollution (pH ~ 3) occurred in canals with sluggish tidal water flow, at 1-2 years after the deposition of excavated spoils onto the embankments in ASS. The amount of acidic loads transferred to the canal networks could be quantified from environmental parameters, including cumulative rainfall, soil type and age of embankment deposits. The study implied that dredging/excavation of canals in ASS areas must be carried out judiciously as these activities may increase the source of acidic pollution to the surrounding water bodies.
Mostrar más [+] Menos [-]Quantifying source and dynamics of acidic pollution in a coastal acid sulphate soil area Texto completo
2013
Phong, N. D. | Tuong, T. P. | Phu, N. D. | Nang, N. D. | Hoanh, Chu Thai
The in-depth knowledge on management and reducing annual acidic pollution is important for improving the sustainable livelihood of people living in areas with acid sulphate soils (ASS). This study involved a long-term (2001–2006), large-scale canal water quality monitoring network (87 locations) and a field experiment at nine sites to quantify the dynamic variability of acidic pollution and its source in a coastal area with ASS in the Mekong River Delta of Vietnam. Widespread acidic pollution (pH <5) of surface water occurred at the beginning of the rainy season, while pH of the canal water remained high (7–8) at the end of the rainy season and during the dry season. The study identified canal embankment deposits, made of ASS spoils from canal dredging/excavation, as the main source of acidic pollution in the surrounding canal network. The findings suggested that there was a linkage between the amount of acidic loads into canal networks and the age of the embankment deposits. The most acute pollution (pH ~ 3) occurred in canals with sluggish tidal water flow, at 1–2 years after the deposition of excavated spoils onto the embankments in ASS. The amount of acidic loads transferred to the canal networks could be quantified from environmental parameters, including cumulative rainfall, soil type and age of embankment deposits. The study implied that dredging/excavation of canals in ASS areas must be carried out judiciously as these activities may increase the source of acidic pollution to the surrounding water bodies.
Mostrar más [+] Menos [-]Effects of roadside soil extracts on seed germination and root elongation of edible crops [carrot, brassica].
1983
Wong M.H. | Lau W.M.
RHIZOtest: A plant-based biotest to account for rhizosphere processes when assessing copper bioavailability Texto completo
2010
Bravin M. | Michaud A.M. | Larabi B. | Hinsinger P.
RHIZOtest: A plant-based biotest to account for rhizosphere processes when assessing copper bioavailability Texto completo
2010
Bravin M. | Michaud A.M. | Larabi B. | Hinsinger P.
The ability of the free ion activity model (FIAM), the terrestrial biotic ligand model (TBLM), the diffusive gradients in thin films (DGT) technique and a plant-based biotest, the RHIZOtest, to predict root copper (Cu) concentration in field-grown durum wheat (Triticum turgidum durum L.) was assessed on 44 soils varying in pH (3.9e7.8) and total Cu (32e184 mg kg_1). None of the methods adequately predicted root Cu concentration, which was mainly correlated with total soil Cu. Results from DGT measurements and even more so FIAM prediction were negatively correlated with soil pH and over-estimated root Cu concentration in acidic soils. TBLM implementation improved numerically FIAM prediction but still failed to predict adequately root Cu concentration as the TBLM formalism did not considered the rhizosphere alkalisation as observed in situ. In contrast, RHIZOtest measurements accounted for rhizosphere alkalisation and were mainly correlated with total soil Cu. (Résumé d'auteur)
Mostrar más [+] Menos [-]RHIZOtest: A plant-based biotest to account for rhizosphere processes when assessing copper bioavailability Texto completo
2010
Bravin, Matthieu | Michaud, Aurélia M. | Larabi, Bourane | Hinsinger, Philippe | Ecologie Fonctionnelle et Biogéochimie des Sols (Eco&Sols) ; Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Ecole Nationale Supérieure Agronomique de Montpellier (ENSA M) | Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-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)
International audience | The ability of the free ion activity model (FIAM), the terrestrial biotic ligand model (TBLM), the diffusive gradients in thin films (DGT) technique and a plant-based biotest, the RHIZOtest, to predict root copper (Cu) concentration in field-grown durum wheat (Triticum turgidum durum L) was assessed on 44 soils varying in pH (3.9-7.8) and total Cu (32-184 mg kg(-1)). None of the methods adequately predicted root Cu concentration, which was mainly correlated with total soil Cu. Results from DGT measurements and even more so FIAM prediction were negatively correlated with soil pH and over-estimated root Cu concentration in acidic soils. TBLM implementation improved numerically FIAM prediction but still failed to predict adequately root Cu concentration as the TBLM formalism did not considered the rhizosphere alkalisation as observed in situ. In contrast, RHIZOtest measurements accounted for rhizosphere alkalisation and were mainly correlated with total soil Cu.
Mostrar más [+] Menos [-]Agricultural drainage system maintains salinity balance in Imperial Valley [California].
1977
MacKenzie A.J.
Explore the 'energy economics' of wastewater treatment and reuse.
1976
Roberts E.B. | Hagan R.M.
Has the environmental movement help or hindered?.
1977
Delanay L.
