Estimation of surface shear strength in semi-arid rangelands of Iran
© Aristotle University of Thessaloniki (6/2009)
Modeling soil erosion and runoff requires accurate estimates of surface soil shear strength. In this study, we investigated the use of artificial neural networks (ANNs) in estimating soil shear strength from measured particle size distribution, topographic attributes, normalized difference vegetation index (NDVI), soil organic carbon (SOC), and CaCO3.
© Aristotle University of Thessaloniki (6/2009)
Modeling soil erosion and runoff requires accurate estimates of surface soil shear strength. In this study, we investigated the use of artificial neural networks (ANNs) in estimating soil shear strength from measured particle size distribution, topographic attributes, normalized difference vegetation index (NDVI), soil organic carbon (SOC), and CaCO3.
Arsenic contaminated environments: bioremediation perspective from molecular analysis on the bacterial arsenical metabolism
© Aristotle University of Thessaloniki (6/2009)
The metalloid arsenic (As) can be released from geological formations and it is widely used in anthropogenic activities (industry, agriculture, etc.) contaminating several aquatic and soil environments. The arsenate As(V) and arsenite As(III) can be subject to microbiologically oxidation, reduction and methylation reactions. Indeed, bacterial metabolisim of arsenical species in the environment is critical in the As cycle. In the present study, novel aerobic bacterial strains responsible for the oxidation and reduction of As were isolated in water samples supplemented with arsenite or arsenate.
© Aristotle University of Thessaloniki (6/2009)
The metalloid arsenic (As) can be released from geological formations and it is widely used in anthropogenic activities (industry, agriculture, etc.) contaminating several aquatic and soil environments. The arsenate As(V) and arsenite As(III) can be subject to microbiologically oxidation, reduction and methylation reactions. Indeed, bacterial metabolisim of arsenical species in the environment is critical in the As cycle. In the present study, novel aerobic bacterial strains responsible for the oxidation and reduction of As were isolated in water samples supplemented with arsenite or arsenate.
The influence of soil to solution ratio on cadmium removal from soils using anionic surfactants
© Aristotle University of Thessaloniki (6/2009)
The effectiveness of cadmium removal from soils by two anionic surfactants at different soil/solution ratio (m/V) was investigated. At critical micelle concentration (CMC) Rosulfan L reduced surface tension of water more sufficiently than ABS Na/S. In soil/surfactant systems CMC values clearly increased in comparison with fresh solutions, indicating surfactants sorption.
© Aristotle University of Thessaloniki (6/2009)
The effectiveness of cadmium removal from soils by two anionic surfactants at different soil/solution ratio (m/V) was investigated. At critical micelle concentration (CMC) Rosulfan L reduced surface tension of water more sufficiently than ABS Na/S. In soil/surfactant systems CMC values clearly increased in comparison with fresh solutions, indicating surfactants sorption.
Soil carbon sequestration affected by cultivation of poor pastures in arid regions of Central Iran
© Aristotle University of Thessaloniki (6/2009)
Soil carbon sequestration through changes in land use and management is one of the important strategies to mitigate the global greenhouse effect. This study was conducted to estimate the rate of soils carbon sequestration in land use changes from poor pastures (PP) to wheat fields (WF) and poor pastures to alfalfa fields (AF) occurring in Abarkooh plain, Central Iran.
© Aristotle University of Thessaloniki (6/2009)
Soil carbon sequestration through changes in land use and management is one of the important strategies to mitigate the global greenhouse effect. This study was conducted to estimate the rate of soils carbon sequestration in land use changes from poor pastures (PP) to wheat fields (WF) and poor pastures to alfalfa fields (AF) occurring in Abarkooh plain, Central Iran.
An evaluation of fertilisation requirement during establishment of Salix cv. Tora hardwood rods in waste-derived organic media (WDOs) and a ‘brownfield’ spoil
© European Compost Network ECN e.V. (10/2008)
Waste-derived organics (WDOs) have the potential to help amend brownfield soils, but the extent to which they can support the establishment of vegetation (e.g. biofuel crops such as willow) requires clarification.
© European Compost Network ECN e.V. (10/2008)
Waste-derived organics (WDOs) have the potential to help amend brownfield soils, but the extent to which they can support the establishment of vegetation (e.g. biofuel crops such as willow) requires clarification.
ASSESSMENT AND REMEDIATION OF HEXAVALENT CHROMIUM CONTAMINATED SITE – A CASE STUDY
© IWWG International Waste Working Group (10/2007)
The environmental contamination of hexavalent chromium (Cr6+) has emerged as a major area of concern in the recent years. Cr6+ is one of the highly toxic carcinogenic substances and is released to environmnt through a number of industrial operations which process or use ores and various comounds of chromium. The wastes and residues generated from such industries (e.g., sludge, fly ash, slag, etc.) contain significant concentrations of Cr6+, and were used in the past as a fill material at numerous locations (Salunkhe et al., 1998). The Cr6+, being highly soluble in water, has been leaching from many such sites and seepage of leachate through subsurface in to the groundwater has posed a considerable health hazard in the vicinity of such sites.
© IWWG International Waste Working Group (10/2007)
The environmental contamination of hexavalent chromium (Cr6+) has emerged as a major area of concern in the recent years. Cr6+ is one of the highly toxic carcinogenic substances and is released to environmnt through a number of industrial operations which process or use ores and various comounds of chromium. The wastes and residues generated from such industries (e.g., sludge, fly ash, slag, etc.) contain significant concentrations of Cr6+, and were used in the past as a fill material at numerous locations (Salunkhe et al., 1998). The Cr6+, being highly soluble in water, has been leaching from many such sites and seepage of leachate through subsurface in to the groundwater has posed a considerable health hazard in the vicinity of such sites.
Contaminants and fertilizers – an assessment concept
© European Compost Network ECN e.V. (9/2006)
SUMMARY: With the resolution to the Federal Soil Protection Act on 17 March 1998 and its entry into force on 1 March 1999 including the corresponding Federal Soil Protection and Contaminated sites Ordinance on 12 July 1999 in Germany the preconditions for federal-unique soil protection were created, as well as benchmarks for a soil referred harmonisation of already existing operational approaches in environmental policy were settled.
© European Compost Network ECN e.V. (9/2006)
SUMMARY: With the resolution to the Federal Soil Protection Act on 17 March 1998 and its entry into force on 1 March 1999 including the corresponding Federal Soil Protection and Contaminated sites Ordinance on 12 July 1999 in Germany the preconditions for federal-unique soil protection were created, as well as benchmarks for a soil referred harmonisation of already existing operational approaches in environmental policy were settled.
