Lead adsorption

Petruzelli G., Guidi G., Lubrano L. Influence of organic matter on lead adsorption by soil. Z. Pflanzenemahr. Dung Bodenkd 1981 144 74-77. 

Hayes, K.F. Leckie, J.O. (1986) Mechanisms of lead adsorption at the goethite-water interface. In Davis, J.A. Hayes, K.F. (eds.) Geochemical processes at mineral surfaces. ACS Symp. Ser. 323, Am. Chem. Soc. Washington D.C., 114-141... 

Ghiorse.W.E. (2002) Effed of oxide formation mechanisms on lead adsorption by biogenic manganese hydroxides and their mixtures. Environ. Sci. Techn. 36 421-425 Nembrini, G. Buffle, J. Haerdi, W. (1976) Vol-tametric behavior of iron(III) hydrolyzed solutions and characterization of the reducible species. J. Colloid Interface Sci. 57 327-336 Nesson, M.H. Lowenstam, H.A. (1985) Biomineralization proceses of radula teeth of chitons. In Kirschvink, J.L. Stone, D.S. (eds.) Magnetite biomineralization and magneto reception in organisms. Plenum Press, New York, 333-363... 

The combination supercritical fluid volatility amplification-molecular sieve process has the potential for producing two valuable products simultaneously from gas oil-lube oil petroleum stocks. In a flow-through molecular sieve bed, the leading adsorption front operates in the lean molecular sieve loading range, providing the conditions needed for the n-paraffin removal needed to produce low pour lube oil, while the trailing adsorption... 

Strawn, D. G., and D. L. Sparks. 1999. The use of XAFS to distinguish between inner- and outer-sphere lead adsorption complexes on Montmorillonite. J. Coll. Interface Sci. 216 257-269. 

Nelson, Y.M. et al., Effect of oxide formation mechanisms on lead adsorption by biogenic manganese (hydr)oxides, iron (hydr)oxides, and their mix lures, Environ. Sci. Technol., 36, 421, 2002. 

This paper presents a comprehensive method for evaluating the surface characteristics needed to predict the adsorption behavior of lead on the silt fraction of sediments from a natural streambed. Also presented is a quantitative description of lead adsorption on such material primarily as a function of pH between 4 and 8, the range most commonly encountered in natural waters. 

Figure 5. Comparison of lead adsorption data (points and solid connecting lines) with best-fitting James-Healy model predictions (broken lines)...

Figure 9 shows the pH-dependence of lead adsorption which would be predicted using the chemical free-energy term that gives the best fit in the James and Healy ( ) model with the data in Table I. It can be seen that the adsorption edge positions are rather similar for total lead concentrations which differ by an order of magnitude or more. Only when the total lead concentration closely approaches the CEC is it predicted that it becomes... 

D. Dong, X. Hua, Y. Li, and Z. Li, Lead adsorption to metal oxides and organic material of freshwater surface coating determined using a novel selective extraction method, Environl. Pollut. 119 (2002) pp. 317-321. 

Z. Reddad, C. Gerente, Y. Andres, and J. F. Thibault, Cadmium and lead adsorption by a natural polysaccharide in ME membrane reactor experimental analysis and modelling. Water Research 37, 3983-3991 (2003). 

The fallacy of assigning single values to the sorption of metal cations is evident from Figs. 10.13 and 10.14, which show Pb adsorption by kaolinite and Cd by montmorillonite. Lead adsorption has been measured as a function of pH. Clearly, a sorption isotherm equation is needed to... 

Liu, C., and Huang, P. M. (2003). Kinetics of lead adsorption by iron oxides formed under the influence of citrate. Geochim. Cosmochim. Acta 67, 1045-1054. 

Rivera-UtriUa, J., Bautista-Toledo, L, Ferro-Garcia, M.A., et al. (2001). Activated carbon surface modifications by adsorption of bacteria and their effect on aqueous lead adsorption. J. Chem. Technol. Biotechnol, 76, 1209—15. 

Giammar, D.E., Mans, C.J., and Xie, L., Effects of particle size and crystalline phase on lead adsorption to titanium dioxide nanoparticles. Environ. Eng. Sci., 24, 85, 2007. 

The case of iodide adsorption on gold can be fruitfully compared to that of lead adsorption on gold faces which takes place with complete charge transfer, i.e., by so-called underpotential deposition (UPD). 

Stragier H, Cross JO, Rehr JJ, Sorensen LB, Bouldin CE, Woicik JC (1992) Diffraction anomalous fine structure A new X-ray structural technique. Phys Rev Lett 69 3064-3067 Strawn DG, Scheidegger AM, Sparks DL (1998) Kinetics and mechanisms of Pb(II) sorption and desorption at the aluminum oxide-water interface. Environ Sci Technol 32 2596-2601 Strawn DG, Sparks DL (1999) The use of XAFS to distinguish between inner- and outer-sphere lead adsorption complexes on montmorillonite. J Colloid Interface Sci 216 257-269 Strawn DG, Sparks DL (2000) Effects of soil organic matter on the kinetics and mechanisms of ( ) sorption and desorption in soil. Soil Sci Soc Am J 64 144-156 Stumm W (1992) Chemistry of the Sohd-Water Interface. John Wiley Sons, Inc, New York... 

Pripc-Majic, D., Karacic, V., Skender, L., 1990. A follow-up study of lead adsorption on cows as an indicator of environmental lead pollution. Bull. Environ. Contam. Toxicol. 45, 19-24. 

With real industrial wastewater having a very high concentration of lead, either dilution of the waste or a higher dose of the adsorbent is required for efficient removal. Presence of other ions in the wastewater interferes in the lead adsorption. 

Lead adsorption at pH 4.0 in the absence of organic ligands varied from 20% on the noncrystalline Al-oxide to 33-36% on Fe-Al oxides (R4—RIO) or ferrihydrite (R°°) of the amount initially added (117 mmol Pb per kg). In the presence of OX or TR, the quanhhes of Ph adsorbed on the oxides usually increased with an increase in (Fig. 6). Some experiments revealed that adsorption of Ph on... 

Lead ion, Pb(II) present in pore fluids, is highly adsorbed by clay minerals. Selectivity of kaolinite for Pb is higher than Ca, Cu, Zn, and Cd (Alloway, 1990). For a given type of clay, lead adsorption is mainly controlled by its concentration and the pH value of the solution. Past results showed that the ratio of adsorbed lead to total lead in kaolinite increases linearly with pH up to 5 (Yong et al, 1990). The following empirical relation developed by Alshawabkeh and Acar (1996) was used to represent the lead adsorption of kaolinite at different pH values ... 

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