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 soilcontaminated as a result of smelting operations. ... a variety of techniques, includingXRD, XAFS, and micro-focused XAFS to demonstrate that upon weathering of Zn-mineral phases in soils, Zn was taken up by the formation of Zn-containingphyllosilicates ... heterogeneous in nature, containing dissolved organicmatter and other metal-binding ligands over a range of concentrations. This leadsto metal-ligand complexes in the soil solution and ternary...

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 10 ppsx

... Keefer et al.(1 984 ) 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 ... decreasing metalsorption in soils. In most agricultural soils with pH ranging from 5 to 8, such as soils containing larger amounts of 2:1 minerals, DOM, is mainly present in themobile form instead ... immobilization in soil solution through formation of a ternary metal-DOM-soil complex. Kalbitz and Wennrich (19 98) found that DOM was of minor impor-tance in the mobilization of heavy metals in soils...

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 2 pps

... for In situ Treatment of Metal Contaminated Soils, EPA-542-R-97–004, USEPA, Washington, D.C., 1997.3. Forstner, U., Land contamination by metals: Global scope and magnitude of problem, in Metal ... concentrations in the eluent were determined by placing 200 ml of thesample into a Bio-Tek multichannel (optical densitometer with ﬁber-optics technol-ogy; Bio-Tek Instruments, Inc., Winooski, VT) ... contributions of associated mineral colloids with variable composition [24– 28] .However, in many cases the generally higher binding energies of trace metals tomineral- rather than organic-colloid...

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 4 docx

... unraveling the afﬁnity of mineral surfaces forboth 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-O2 and Al2-OH groups and the reactivity of basal surfaces populated with Al-OH−1/2, Si-O–1,SiAl-O−1/2 and other groups. Thus, the unreactivity of ... Faisandier, K. et al., Structural organization of Na- and K-montmorillonite suspen-sions in response to osmotic and thermal stresses, Clays Clay Miner., 46, 636, 19 98. 10. Derrindinger, L. and...

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 5 pptx

... 1149 11541136 1142 87 5 87 0 1149 1151 1 086 1 088 1039 1061 653 654 10 38 1022 1035 10 18 781 782 85 4 86 2 85 3 84 8661 654 772 769 659 653661 663 592 589 Source: Trout, C.C. and Kubicki, J.D., UV ... 1553 1 488 14221495 1457 1495 1433 1 489 1474 1499 1 482 1 584 1 487 1 581 1466 1446 1 381 1451 1439 1417 1353 1362 1344 1463 14 48 1 487 1449 1540 14 48 1400 1347 1412 1313 1400 1310 1325 1325 1 388 1393 ... A.D., Density-functional exchange-energy approximation with correct asymp-totic-behavior, Phys. Rev. A, 38, 30 98, 1 988 . 48. Lee, C.T., Yang, W.T., and Parr, R.G., Development of the Colle-Salvetti...

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 7 pptx

... crystalline and of mixed oxidation state (Hem and Lind, 1 983 ; Murray et al.,1 985 ; Adams and Ghiorse, 1 988 ; Wehrli et al., 1992; Mandernack et al., 1995;Mandernack et al., 1995). Investigations using ... 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, 1 988 , p. 59.Brouwers, G.J. et al., Stimulation of ... Cosmochimica Acta, and Limnology and Oceanography.REFERENCESAdams, L.F. and Ghiorse, W.C., Characterization of extracellular Mn2+-oxidizing activity and isolation of an Mn2+-oxidizing protein from...

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 85 6 1.15 E-4 2. 28 E-3 86 8Sr 2.39 E-4 1. 28 E-5 74.9 2.77 E-4 1.03 E-5 98. 1Zn 2.37 E-5 4.56 E-5 155 2 .80 E-5 6. 68 E-5 ... concentrations of Ca and Mg from LaJara soil.FIGURE 9.2 Soluble concentrations of Mn and Sr from LaJara soil.0.0E+002.0E-044.0E-046.0E-04 8. 0E-041.0E-031.2E-031.4E-031.6E-0324 36 48 60 72 84 HoursConcentration ... of 1 .89 E-4 M for the LaJara soil and 4.10 E-4 M for the Mogote soil foreach 12-h interval. In terms of the concentration of Mn in the soil, the amount of Mn dissolved after 84 h was 5.41 E-4...

Geochemical and Hydrological Reactivity of Heavy Metals in Soils - Chapter 11 ppt

... useful for understanding trace metal behavior in soils. Fl-FFF has also been coupled to ICP-MS for the determination of element sizedistributions of 28 elements, including C, in natural waters.91 ... generated within this interaction volume (Figure 11.7(a)). An under-standing of the size and shape of the interaction volume for a given specimen as in uenced by the beam parameters (i.e., instrumentation) ... particles orother low-molecular-weight compounds. Laskin and Cowin96 also note that utiliza-tion of the SE signal may be necessary when performing automated analysis of low-atomic-number materials,...

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 ... manufacturing incinerators but either they could not apply in reality or incinerators were inefficient. The abatement cost of treating one kilogram of solid medical waste is 8, 000vnd on average and ... investment in waste-treatment-systems. Research and Development projects should also be invested in to find out the best technologies for reducing abatement cost and increasing the effect and efficiency...

Heavy Metals Release in Soils - Chapter 4 ppsx

... transport in contaminated minetailings following liming. J. Environ. Qual. 26:43 3-4 39.Jurinak, J.J. and J. Santillian-Medrano. 1974. The chemistry and transport of lead and cad-mium in soils. ... used to investigate the solubility and mobility of metals from mine- and smelter-contaminated soils include measuring the distribution of metal contam-inants with progressive depth in soil proﬁles, ... Reactivity and Transport of Heavy Metals in Soils. CRC Press, Boca Raton, FL.Selim, H.M., M.C. Amacher, and I.K. Iskandar. 1990. Modeling the transport of heavy metals in soils. CRREL-Monograph 9 0-2 ,...

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