rdx hmx contaminated soil and water

... concentration of the soil The study determines the forms and concentration of lead in the soil and evaluates plant growth and metal uptake from the soil under greenhouse conditions The bulk soil samples ... 1983) Soil pH was measured in a 1:1 soil: water suspension Duplicates and spikes were carried through the procedure in combination with National Institutes of Standards and Technology (NIST) Standard ... plants to remediate soil contaminated with heavy metals and radionuclides Phytoremediation offers an attractive and economical alternative to currently practiced soil removal and burial methods...

Ngày tải lên: 11/08/2014, 15:20

... wetlands since water is pumped through the system at no cost Finally, the different chemistry and biology of marine and inland saltwater wetlands distinguishes them from the more usual freshwater ... trees, acid bogs by Sphagnum and other mosses, and alkaline fens by mosses and grasses (Horne and Goldman, 1994) Depending on the water depth and degree of shading, marshes and swamps also typically ... external water inflows while terrestrial phytoremediation and in situ bioremediation restore contaminated soils or groundwater on site The common method of groundwater cleanup “pump and treat,”...

Ngày tải lên: 11/08/2014, 15:20

... in central California soils (Bañuelos and Meek, 1990; Terry and Zayed, 1994, 1998; Parker and Page, 1994; Wu and Huang, 1991) and for removing other toxic trace elements in soils (Baker et al., ... Wu, L., J Chen, K.K Tanji, and G.S Bañuelos Distribution and biomagnification of selenium in a restored upland grassland contaminated by selenium from agricultural drain water Environ Toxicol Chem ... plots were more effective in lowering total soil Se in years 1992 and 1993 than in 1994 and 1995 The percentage changes between preplant and post-harvest soil Se concentrations (lost Se) after years...

Ngày tải lên: 11/08/2014, 15:20

... meter of soil depth removed, costs are between $8 and $24 million per hectare (includes disposal in a hazardous waste landfill and replacement with clean soil; Cunningham and Berti, 1993) Soil remediation ... Angle, R.L Chaney, and A.J.M Baker 1995b Zinc and cadmium uptake by Thlaspi caerulescens and Silene vulgaris grown on sludge-amended soils in relation to total soil metals and soil pH Environ Sci ... (Zn, Cd, Ni, Co, Mn) from soils, studies should be conducted to evaluate the independent effect of soil pH, and soil cations on yield and X uptake It was noted above that soil phosphate levels needed...

Ngày tải lên: 11/08/2014, 15:20

... toxic levels in the soil at the population site (e.g., Gregory and Bradshaw, 1965; Allen and Sheppard, 1971; Hogan and Rauser, 1979; Verkleij and Bast-Kramer, 1985; Schat and Ten Bookum, 1992b; ... available Schat and Vooijs (1997a) have demonstrated independent genetic control of Cu, Zn, and Cd tolerance in S vulgaris In agreement with this, Cu and Zn tolerance (Macnair, 1993) and Cu and Ni tolerance ... in F ovina On the other hand, several nonfunctional tolerances in S vulgaris, such as those to Ni and Co in zinc-mine populations (Schat and Ten Bookum, 1992b) and to Ag and Hg in copper mine populations,...

Ngày tải lên: 11/08/2014, 15:20

... nitric acid and perchloric acid according to standard methods (Jones and Case, 1990) The resulting solution was analyzed for metal content by ICP Certified National Institute of Standards and Technology ... 4.6 μmol L-1 H 3BO3 and 0.01 μmol L-1 MoO (pH between 5.5 and 5.8) Plants were cultivated in the growth chamber with 10-h light periods Light was provided by fluorescent and incandescent lamps All ... suggests that it may protect plants against herbivory and attack by fungal and bacterial pathogens (Boyd and Martens, 1994; Boyd et al., 1994; Pollard and Baker, 1997) It has been shown for a number...

Ngày tải lên: 11/08/2014, 15:20

... metals and other environmental conditions at the contaminated site, enhanced uptake and transport of metals, and sequestration of metals in shoot tissues Manipulating the expression of PCs and MTs ... cadmium, mercury, and lead (Howden and Cobbett, 1992; Chen and Cunningham, personal communication), but have essentially normal levels of tolerance to other metals, including copper and zinc This ... expression of MT genes and detailed analysis of mutants with altered tolerance to Cu, Zn, and other metals MANIPULATION OF METAL LIGANDS FOR PHYTOREMEDIATION Plants that are selected and developed for...

Ngày tải lên: 11/08/2014, 15:20

... correlated with both soil toxicity and plant tolerance The few data sets in which this analysis is possible (Lloyd-Thomas, 1995; Meerts and Van Isacker, 1997; Dandridge and Pollard, unpublished) ... serpentine and on normal soils, Boyd and Martens (1998) found no significant differences in the ability of serpentine and nonserpentine populations to take up nickel from uniform soil media (tolerance ... Britain, Belgium, and Spain using both soil and hydroponic media He reported statistically significant differences between populations in their ability to hyperaccumulate zinc, nickel, and cadmium,...

Ngày tải lên: 11/08/2014, 15:20

... and released into the soil during decay of the leaves The soil contains about 10 mg nickel per gram soil The soil is healthy with respect to humus content and structure and contains nickel-resistant ... Szaniszlo, and C.P.P Reid, Comparison of the abilities of hydroxamate and other organic acids to chelate iron and other ions in soil Soil Sci 136, 145-157, 1983 Cline, G.R., C.P.P Reid, P.E Powell, and ... polluted by heavy metals and/ or organic xenobiotics Similar bacteria are isolated from desertified soils (Maatheide) and low-grade ore deposits in Belgium and Zaïre (Diels and Mergeay, 1990) All...

Ngày tải lên: 11/08/2014, 15:20

... and Ohlendorf, H.M Contaminants in drainage water and avian risk thresholds, in Dinar, A., and Zilberman, D., Eds., The Economy and Management of Water and Drainage in Agriculture Kluwer Academic ... be a major driver of Se biogeochemistry (Cutter and Bruland, 1984; Cooke and Bruland, 1987), as they are in the case of the sulfur cycling (e.g., Andreae, 1986; Bates et al., 1987) Recent findings ... County, CA (Figure 16.1B) However, waterborne Se conCopyright © 2000 by Taylor & Francis FIGURES 16.1A and B Relationship between waterborne Se concentration and salinity at two multicell evaporation...

Ngày tải lên: 11/08/2014, 15:20

... Berti, and J.W Huang Phytoremediation of contaminated soils Trends Biotechnol 13, 393-397, 1995a Cunningham, S.D and C.R Lee, Phytoremediation: plant-based remediation of contaminated soils and ... 1994 Bollag, J.-M and W.B Bollag, Soil contamination and the feasibility of biological remediation, in Bioremediation: Science and Applications, Skipper, H.D and R.F Turco, Eds., Soil Science Society ... in a soil with reduced heavy metal concentrations and restored soil quality (soil fertility) Today, soil decontamination techniques use the ability of plants to extract heavy metals from soil...

Ngày tải lên: 11/08/2014, 15:20

... total soil Cd content) in relation to soil pH as a consequence of the incorporation of selected ameliorating agents into four metal -contaminated soils: Soil A, Louis Farges; Soil B, Evin; Soil ... Evin; Soil C, Seclin; and Soil D, Ambares SOIL AMENDMENTS AGENTS AND THEIR EFFECTIVENESS AS IMMOBILIZING Mn and Fe Oxides Structure of hydrous Fe and Mn oxides Hydrous ferric and manganese oxides ... oxide deposition and elevated Fe and Mn concentrations Iron and Mn may be released into the soil solution and diffuse, subsequently forming oxides in the soil These may coat soil particles, creating...

Ngày tải lên: 11/08/2014, 15:20

... Soil and Water Quality: An Agenda for Agriculture http://books.nap.edu/catalog/2132.html Copyright © 2004 National Academy of Sciences All rights reserved This executive summary plus thousands ... http://www.nap.edu Soil and Water Quality: An Agenda for Agriculture http://books.nap.edu/catalog/2132.html Copyright © 2004 National Academy of Sciences All rights reserved This executive summary plus thousands ... http://www.nap.edu Soil and Water Quality: An Agenda for Agriculture http://books.nap.edu/catalog/2132.html Copyright © 2004 National Academy of Sciences All rights reserved This executive summary plus thousands...

Ngày tải lên: 16/03/2014, 16:20

Ngày tải lên: 17/03/2014, 16:20

... 10 µg/mL CIPC and 3CA uptake within 30 days at 20°C and 30°C using 5g soil 194 Figure 4.6 – 10 µg/mL CIPC and 3CA uptake in clay and sandy soils within four days at 20°C using g soil ... with a water stream and might be degraded to 3CA that can disperse well in water Since CIPC and its major metabolite are the potential long-term threat for groundwater, surface waters and soil ... accumulate in water and soil (Linde 1994) In natural soil media, CIPC concentration reduces by adsorption on the soil surface and by the microbial route The main soil components are sand (silica...

Ngày tải lên: 22/12/2014, 21:19

... in soil and Cu accumulation in plant, and also the role of phosphate in reducing the uptake of Cu by Brassica juncea L 2.2 Sampling and chemical analysis Plant and soil samples were taken and ... Cu in soil and plant tissues, Cu2+ (HNO3 0.43N) in soil was determined by Atomic Absorption Spectroscopy (AAS) Materials and methods Results and discussion 2.1 Pot experiments Alluvial soils ... samples (leaves and shoots) are collected and washed with pure water and then dried at 70oC until stabilisation of weight The monitoring indicators for plants growth include plant height and biomass...

Ngày tải lên: 14/03/2014, 15:20

... evapotranspiration and physical properties of soil (Shukla et al., 2003) Soil water retention which is an important soil hydrological property is influenced by soil structure (Fu et al., 2000), soil moisture and ... conducted on forest - water relationships in Vietnam This study intends to improve our understanding of the effects of forests and watershed characteristics on soil water retention and flow regimes, ... relations between water and forestation activities at the watershed and regional scales There have not been enough hydrological studies to fully understand the linkages between forests and water (Phuong...

Ngày tải lên: 03/04/2014, 12:22

... wide range of factors including: soil type, field slope and drainage, irrigation system type and management, fertilizer and manuring practices, and other soil and water management practice However, ... Handbook 60 (Richards 1954), Rhoades and Clark 1978, FAO Soils Bulletin 10 (Dewis and Freitas 1970), and Standard Methods for Examination of Waters and Wastewaters (APHA 1980) The method most appropriate ... H and Chaney R.L (1974) Land treatment of wastewater Advances in Agronomy, Vol 26 N.C Brady (ed) Academic Press, New York Dewis J and Freitas F 1970 Physical and chemical methods of soil and water...

Ngày tải lên: 28/06/2014, 11:20

... Handbook of Environmental Analysis Chemical Pollutants in Air, Water, Soil, and Solid Wastes Pradyot Patnaik, Ph.D LEWIS PUBLISHERS Boca...

Ngày tải lên: 08/08/2014, 00:22