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

... 0.142 0 .75 22.18 29.4 0.080 0.130 0.210 0.069 0.451 0 .77 22.93 29.6 0.204 0.2 27 0.432 0.1 57 0.823 0. 87 23. 27 26.9 0.382 0.326 0 .70 8 0.880 1.214 0 .73 21.19 29.0 0 .77 5 0.338 1.113 1.638 0. 873 0.42 ... comparison of the Sargasso Sea and equatorial Pacific, Deep Sea Res. Part I Oceanogr. Res. Pap., 44, 1 277 , 19 97. Moffett, J.W. and Ho, J., Microbially mediated incorporati...

Ngày tải lên: 11/08/2014, 10:22

... interaction of NOM with hydrophobic organic contaminants. The development of more hydrophobic regions and coiling of the C backbone could increase the sorption of hydrophobic contam- inants and increase ... acids on hydrous γ-Al 2 O 3 , J. Colloid Interface Sci., 75 , 373 , 1980. 67. Kubicki, J.D., Sykes, D., and Apitz, S.E., Ab initio calculation of aqueous aluminum and a...

Ngày tải lên: 11/08/2014, 10:22

... 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) ... gradients and conditions enhancing or inhibiting colloid-mediated transport. The following case studies were used to demonstrate the effects of mineralogy on colloid-mediated transport...

Ngày tải lên: 11/08/2014, 10:22

... 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 ... FN edge (C/m 2 ) SWy-1 montmoril- lonite 2.61 5.32 −0.34 −0 .73 0.03 0.105 (0. 87) 0.008 (0.0 67) Argentinean mont- morillonite 4.46 6.80 0 .72 0 .76 0. 07 0.096...

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. ... 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

... 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 ... + represents the model with addition of Ni from the Mn oxide fraction. 0.0E+00 5.0E-08 1.0E- 07 1.5E- 07 2.0E- 07 2.5E- 07 3.0E- 07 3.5E- 07 4.0E- 07 24 36 48 60 72 84 Hours Conce...

Ngày tải lên: 11/08/2014, 10:22

... 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 ... − 1 (C-N stretch in amino acid and C-O stretch in polysac- charides and carboxyl); and a sharp peak at 620 to 70 0 cm − 1 ( C-H bending in aromatic ring or C-H defo...

Ngày tải lên: 11/08/2014, 10:22

... 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) ... useful for understanding trace metal behavior in soils. Fl-FFF has also been coupled to ICP-MS for the determination of element size distributions of 28 elements, incl...

Ngày tải lên: 11/08/2014, 10:22

... widely used in modeling the fate and transport of metals (and also other inorganic and organic contaminants) in the environment because of the ease of measurement, and of the large amount of data concerning ... review of past and current research concerning metal partitioning in soils, discussion on important parameters affecting partitioning of metals in...

Ngày tải lên: 12/08/2014, 02:20

... 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