Sorption kinetics and leachability of heavy metal from the contaminated soil amended with immobilizing agent (humus soil and hydroxyapatite)

Adsorption and Desorption of Lead (Pb) in Sandy Soil Treated by Various Amendments

“…These mechanisms are pseudo-order 1 (R2=0.902) for soil, pseudo-order 2 for bentonite, crab meal and eggshells with respective coefficients of determination (R2=0.749, R2=R20, 985 and=0.915). These findings are consistent with the work of several researchers [11][12][13][14][15][16][17]. The low coefficient of determination for adsorption of Pb by bentonite suggests other competing mechanisms such as diffusion [14,18].…”

Pb, Zn, and Cd Distribution and Migration at a Historical Zinc Smelting Site

“…One was through runoff in dissolved form, and the other was through soil erosion in the form of SPM. Dissolved Pb, Zn, and Cd in stream waters were only 1.6%, 14.7%, and 26.5% of the total metals, respectively, suggesting that the adsorption capacity of metals was Pb > Zn > Cd, which was similar to the results reported by some researchers [45,46]. In addition, the data showed that Pb, Zn, and Cd in stream water were derived predominantly from soil erosion and transferred to lower reaches predominantly through SPM (Table 3).…”

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

“…A good correlation of the kinetic data explains the biosorption mechanism of the metal ion on the solid phase and also the residence time of sorption reaction (Chaturvedi et al 2006). In order to evaluate the kinetic mechanism that controls the biosorption process, the pseudo-first-order and pseudo-second-order models were applied for the biosorption of As(III) ions on the MLP and RH.…”