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 ... solution, and a H represents the activity of protons in the bulk. The combination of equations 4. 2 and 4. 3 gives (4. 4) In dilute solutions is i...

Ngày tải lên: 11/08/2014, 10:22

... for In situ Treatment of Metal Contaminated Soils, EPA- 542 -R-97–0 04, 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 the sample into a Bio-Tek multichannel (optical densitometer with fiber-optics technol- ogy; Bio-Tek Instruments...

Ngày tải lên: 11/08/2014, 10:22

... 145 7 149 5 143 3 148 9 147 4 149 9 148 2 15 84 148 7 1581 146 6 144 6 1381 145 1 143 9 141 7 1353 1362 1 344 146 3 144 8 148 7 144 9 1 540 144 8 140 0 1 347 141 2 1313 140 0 1310 1325 1325 1388 1393 147 5 142 6 149 3 142 5 ... 1636 16 34 1600 1600 1592 1608 1609 1607 1607 15 64 15 94 149 6 1531 1592 1588 1587 15 84 148 7 145 7 145 7 146 3 1553 1563 1 548 1567 144 9 143 8 1383 140 4...

Ngày tải lên: 11/08/2014, 10:22

... Friedl, G., and Manceau, A., Reaction rates and products of manganese oxidation at the sediment–water interface, in Advances in Chemistry Series 244 , Aquatic Chem- istry: Interfacial and Interspecies ... 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

... 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. ... adsorp- tion and interaction of transition and heavy metals. 4 Before any remediation strat- egy is attempted, it is wise to determine and understand the...

Ngày tải lên: 11/08/2014, 10:22

... 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-5 143 Ni ... of Ca and Mg from LaJara soil. FIGURE 9.2 Soluble concentrations of Mn and Sr from LaJara soil. 0.0E+00 2.0E- 04 4.0E- 04 6.0E- 04 8.0E- 04 1.0E-03 1.2E-03 1.4E-03 1.6E-...

Ngày tải lên: 11/08/2014, 10:22

... Keefer et al. (19 84) 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 ... − 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 aromatic ring or C-H deforma...

Ngày tải lên: 11/08/2014, 10:22

... spectra. 93, 94, 96 As an 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 ... chemical dispersing agent 33, 34 ; (3) dissolution of carbonate or Fe-cementing agents resulting in the release and transport of silicate clays 35–38 ; and (4) pre...

Ngày tải lên: 11/08/2014, 10:22

... 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 ... 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...

Ngày tải lên: 23/09/2012, 15:38

... cited in McGregor: 47 . 17 McGregor 52. 18 ibid 4 8 -4 9. 19 ibid 6 5-6 6. 20 ibid 47 ; she also cites Martin S. Pernick, A Calculus of Suffering: Pain, Professionalism, and Anesthesia in Nineteenth-Century ... history of the emergence of gynecology occurred in the context of the growth of medical institutions and increasing specialization in scientific...

Ngày tải lên: 05/03/2014, 15:20