Heavy metal sorption

Soil pH strongly affects adsorption of Cd, Zn, and Pb in soils, but less so for Cu. In addition, Ca2+ is the major soil solution cation of arid soils. Ca2+ has been shown to be important in inhibiting divalent heavy metal sorption in calcareous soils. Theoretically, the presence of Ca2+ in soil solution may reduce metal adsorption in arid soils. However, high pH increases overall metal adsorption in arid soils. 

Elliott El.A., Liberat M.R., Eluang C.F. Effect of iron oxide removal on heavy metal sorption by acid subsoils. Water Air Soil Pollut 1986 27 379-389. 

Chen, X.-B., Wright, J. V., Conca, J. L. Peurrung, L. M. 1997b. Effects of pH on heavy metal sorption on mineral apatite. Environmental Science Technology, 31, 624-631. 

Tien (1987) studied the kinetics of heavy metal sorption-desorption on sludge using the stirred-flow reactor method of Carski and Sparks (1985). Sorption-desorption reactions were rapid with an equilibrium reached in 30 min. The sorption-desorption reactions were reversible. The sorption rate coefficients were of the order Hg > Pb > Cd > Cu > Zn > Co > Ni, while the desorption rate coefficients were of the order Cd > Cu > Hg >... 

Sandau, E., Sandau, P., Pulz, O. Zimmermann, M. (1996). Heavy metal sorption by marine algae and algal by-products. Acta Biotechnology, 16, 103-19. 

OzsvATH, D. 1979. Modeling heavy metal sorption from subsurface waters with the n-power exchange function. M.S. thesis. The Pennsylvania State Univ, University Park, PA. 

Neubauer, U., Nowak, B., Fuirer, G.. and Schulin, R. (2000). Heavy metal sorption on clay minerals affected by the siderophore desferrioxamine B. Environ. Sci. Technol. 34, 2749-2755. 

Loretta Y. and F. Li, Heavy metal sorption and hydraulic conductivity studies using three types of bentonite admixes, J. Environ. Engg, 127(5), May 2001, pp. 420-423. 

Saunders, J.A., and Toran, L.E., 1995. Modeling of radionuclide and heavy metal sorption around low- and high-pH waste disposal sites at Oak Ridge, Tennessee. Appl. Geochem., v. 10, pp. 673-684. 

Chen X-B, Wright, JV, Conca JL, Peurrung LM (1997a) Effects of pH on Heavy Metal Sorption on Mineral Apatite. Environ Sci Technol 31 624-631... 

The other principal controls on heavy metal availability proposed previously are the layer silicates, organic matter, and carbonates. Where the controls for a given process are not understood, numerous hypotheses are to be expected. The previous explanations of heavy metal sorption by the layer silicates include surface sorption, surface complex ion formation, lattice penetration, and ion exchange. The mechanisms of heavy... 

The significance of pH as a variable, affecting both rate and capacity of heavy metal sorption, has tended to be overlooked in comparisons of the effect of cation saturation on heavy metal sorption. Kanehiro (129)... 

The immobilization rates in soils are also in marked contrast to heavy metal sorption rates obtained in the laboratory. The data of Hodgson (106) on the sorption of cobalt by montmorillonite yield sorption rates similar to those obtained with freshly precipitated Fe -Fe oxide (119),... 

Di Toro, D. M., J. D. Mahony, P. R. Krichgraber, A. L. O Byrne, and L. R. Pasquale. 1986. Effect of nonreversibility, particle concentration and ionic strength on heavy metal sorption. Environ. Sci. Technol. 20 55-56. 

Sousa DA, Oiveira E, Nogueira MC, Esposito BP. Development of a heavy metal sorption system through the P=S functionalization of coconut (Cocos nucifera) fibers. Bioresour Technol 2010 101 138-143. 

Ritchie, S.M.C., Dachas, L.G., Olin, T., Sikdar, S.K., and Bhattacharyya, D. 1999. Surface modification of silica- and ceUulose-based microfiltration membranes with functional polyamino acids for heavy metal sorption. Langmuir 15 6346-6357. 

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