Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 10 ppsx
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 10 ppsx
... pointed out that the HiB fraction mainly consisted of the N-containing group, including most amino acids, amino sugar, low-molecular-weight amines, and pyri- dine, while the HiA fraction contained ... at 105 0 to 1130 cm − 1 (C-N stretch in amino acid and C-O stretch in polysac- charides and carboxyl); and a sharp peak at 620 to 700 cm − 1 ( C-H bending in aroma...
Ngày tải lên: 11/08/2014, 10:22
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 8 ppsx
... this point, the remainder of the chapter focuses on the combination of several analytical techniques in determining and quantifying Zn speciation in a soil contaminated as a result of smelting operations. ... a variety of techniques, including XRD, XAFS, and micro-focused XAFS to demonstrate that upon weathering of Zn-mineral phases in soils, Zn was taken up by the form...
Ngày tải lên: 11/08/2014, 10:22
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 2 pps
... concentrations in the eluent were determined by placing 200 ml of the sample into a Bio-Tek multichannel (optical densitometer with fiber-optics technol- ogy; Bio-Tek Instruments, Inc., Winooski, VT) ... through initial formation of surface-hydrated complexes and eventual co-precipitation and incorporation of the metal into the carbonate structure [42]. Therefore, chemisorption pro...
Ngày tải lên: 11/08/2014, 10:22
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 4 docx
... unraveling the affinity of mineral surfaces for both inorganic and organic species. The main effects of proton adsorption-desorption on the adsorption of metals in general and heavy metals in particular ... of basal surfaces populated with Si-O 2 and Al 2 -OH groups and the reactivity of basal surfaces populated with Al-OH −1/2 , Si-O –1 , SiAl-O −1/2 and other...
Ngày tải lên: 11/08/2014, 10:22
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 5 pptx
... 1280 104 1 102 9 1178 1114 1160 1114 1148 1148 1228 1221 1160 1136 1293 1245 102 3 943 106 9 101 4 1104 106 6 106 7 1114 1150 1123 1145 108 6 1274 1153 102 7 991 106 5 101 4 103 9 103 0 107 2 107 5 107 5 103 9 ... interaction of NOM with hydrophobic organic contaminants. The development of more hydrophobic regions and coiling of the C backbone could increase the sorpt...
Ngày tải lên: 11/08/2014, 10:22
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 7 pptx
... Cosmochimica Acta, and Limnology and Oceanography. REFERENCES Adams, L.F. and Ghiorse, W.C., Characterization of extracellular Mn 2+ -oxidizing activity and isolation of an Mn 2+ -oxidizing protein from ... reactions and organic interactions in soils, in Manganese in soils and plants, Graham, R.D., Hannam, R.J., and Uren, N.C., Eds., Kluwer, Dor- drecht, 1988, p. 59...
Ngày tải lên: 11/08/2014, 10:22
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 9 pps
... 5.82 E-2 — — 6.39 E-2 — — Mg 1.83 E-2 — — 2.47 E-2 — — Mn 5.46 E-4 1.79 E-3 856 1.15 E-4 2.28 E-3 868 Sr 2.39 E-4 1.28 E-5 74.9 2.77 E-4 1.03 E-5 98.1 Zn 2.37 E-5 4.56 E-5 155 2.80 E-5 6.68 E-5 ... dissolved by increasing concentrations of a reducing agent. The desta- bilization of Fe and Mn oxides following the addition of a reducing agent to a contaminated soil caused an increase i...
Ngày tải lên: 11/08/2014, 10:22
Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 11 ppt
... example of thin-foil analysis in the SEM, samples of the mineral standard kaolinite (<2 µm fraction, KGa-2, Source Clay Minerals Repository) were dispersed on TEM grids and analyzed using a ... separates containing layer silicates and iron and aluminum oxides, Soil Sci. Soc. Am. J., 56, 107 4, 1992. 2. Golden, D.C. and Dixon, J.B., Silicate and phosphate in uence on kaol...
Ngày tải lên: 11/08/2014, 10:22
Immobilization of heavy metals in sediment dredged from a seaport by iron bearing materials
... easily by using one of the latest technologies – Biofast – a kind of machine for filtering liquid wastes. Biofast are outstanding because of its effectiveness and efficiency. Biofast operates ... of Ministry of public health, up to 2005, there were about 104 7 hospitals with 140,000 sick-beds and 10, 000 medical stations. Out of 2.5 kg wastes eliminated from each sick-b...
Ngày tải lên: 23/09/2012, 15:38
Heavy Metals Release in Soils - Chapter 4 ppsx
... describing and interpreting metal release and trans- port from mine- and smelter-contaminated soils. Combinations of the methods described may offer the best possible solution to understanding metal ... soils contaminated from mining, smelting, and refining of metal ores. In this chapter, metal release and transport from soils contaminated from anthro- pogenic activities...
Ngày tải lên: 12/08/2014, 02:20