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

... 0.142 0 .75 22.18 29.4 0.080 0.130 0.2100.069 0.451 0 .77 22.93 29.6 0.204 0.2 27 0.4320.1 57 0.823 0. 87 23. 27 26.9 0.382 0.326 0 .70 80.880 1.214 0 .73 21.19 29.0 0 .77 5 0.338 1.1131.638 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 incorporation of trace-elements into manga-nese ... mediated mineral formation: Insights into manganese(II) oxi-dation from molecular genetic and biochemical studies, in Geomicrobiology: Inter-actions Between Microbes and Minerals, Banﬁeld, J.F. and...

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

... interaction of NOM withhydrophobic 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 hydrousγ-Al2O3, J. Colloid Interface Sci., 75 , 373 , 1980. 67. Kubicki, J.D., Sykes, D., and Apitz, S.E., Ab initio calculation of aqueous aluminum and aluminum-carboxylate NMR chemical ... 2001. 17. Kubicki, J.D. and Bleam, W.F., An introduction to molecular modeling, in MolecularModeling of Clays and Mineral Surfaces, Kubicki, J.D. and Bleam, W.F., Eds., ClayMinerals Society, in...

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

... 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) ... gradients and conditions enhancing or inhibitingcolloid-mediated transport. The following case studies were used to demonstrate theeffects of mineralogy on colloid-mediated transport of metals. ... addition of dispersing agent) in plastic bottles, shaking overnight, centrifuging at 75 0 rpm ( × 130 g ) for 3.5 min, and decanting. The concentration of the colloid fraction wasdetermined...

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 ... FNedge(C/m2)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 (0.80)0.008(0.0 67) Illite 3.98 7. 75 1.63 2. 47 ... 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...

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 ... 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 nature of the interac-tions of metal...

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 868Sr 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 ... + represents the model withaddition of Ni from the Mn oxide fraction.0.0E+005.0E-081.0E- 07 1.5E- 07 2.0E- 07 2.5E- 07 3.0E- 07 3.5E- 07 4.0E- 07 24 36 48 60 72 84HoursConcentration (M)Ni modelNi ... addition of Zn from the Mn oxide fraction; Zn model + represents the modelwith addition of Zn from the Mn oxide fraction.0.0E+001.0E- 07 2.0E- 07 3.0E- 07 4.0E- 07 5.0E- 07 6.0E- 07 24 36 48 60 72 84HoursConcentration...

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 ... − 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 deformation of carbohydrates) ... immobilization in soil solution through formation of a ternary metal-DOM-soil complex. Kalbitz and Wennrich (1998) 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 11 ppt

... 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 sizedistributions of 28 elements, including C, in natural waters.91 ... Langmuir, 16, 75 97, 2000. 73 . Dukhin, S.A., Installation Handbook and User Manual: Model DT-1200 Electroa-coustic Spectrometer, Dispersion Technology Inc., Mount Kisco, NY, 2001. 74 . Duhkin, A.S....

Heavy Metals Release in Soils - Chapter 7 pptx

... widely used in modeling the fate and transport of metals (and also other inorganic and organic contaminants) in theenvironment because of the ease of measurement, and of the large amount of dataconcerning ... review of past and current research concerningmetal partitioning in soils, discussion on important parameters affecting partitioning of metals in soils, and a case study on the natural and methodological ... sorption of cadmium and other metals to the solid phases isnot independent of the solution pH. The strength and capacity of metal oxides and organic matter to bind metals increases with increasing...

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 ... 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 ... research and testing of biological products. 1.1.2. Definition according to the Ministry of Public Health of Vietnam  Medical wastes are material in form of solid, liquid or gases which are eliminated...

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