Sequential sorption of lead and cadmium in three tropical soils

Appel, Christopher E.; Lena, Q.; Rhue, R. D.; Reve, W. H.

doi:10.1016/j.envpol.2007.10.026

Cited by 68 publications

(36 citation statements)

References 41 publications

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“…This observation is in line with existing information that bioaccumulation of heavy metals in terrestrial ecosystems is time dependent (Usman, 2008). The longer the period of exposure of a body of soil to heavy metals, the higher the chances of heavy metal loading beyond toxic threshold levels (Appel et al, 2008). In GARo, the fast sorption process was terminated at the 200 th minute, followed by a rather progressively slow sorption as shown by the shape of plot which reached a well-defined plateau.…”

Section: Sorption Kineticssupporting

confidence: 73%

“…It seems reasonable to link higher retention capacities of metal ions to cation exchange capacity (CEC) and particle specific surface area, values of which were greater in ALVv than GARo. Studies by Appel et al (2008), Bradl (2004) and de Matos et al (2001 demonstrated that heavy metal loading capacity is correlated to high specific surface area of clay particles. Metal-wise comparison based on Langmuir parameter Q max established a higher sorption capacity for Cr 3+ than Pb 2+ and Cu 2+ .…”

Section: Langmuir Modelmentioning

confidence: 99%

“…With the current awareness of heavy metals as very toxic contaminants there have been many studies considering adsorption by solid surfaces as the most important mechanism for controlling metal content in soil solution and natural waters (Echeverria, Morera, Mazkiaran, & Garido, 1998;Bradl, 2004;Appel, Ma, Rhue, & Reve 2008;Javaid, Bajwa, Shafique, & Anwar, 2011). The most important chemical processes affecting the behavior and bioavailability of heavy metals in soils are those concerned with sorption mechanisms of metals from liquid phase onto solid phase (Rybicka, Calmano, & Breeger, 1995;Covelo, Andrade, & Vega, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Sorption of Heavy Metals by Ferralic-Arenosol and Vertic-Luvisol: A Comparative Isothermal Study

Mosekiemang¹,

Dikinya²,

Toteng³

2014

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Modeling of sorption data is essential for characterizing retention of heavy metals by the soil matrices as well as to predict the fate of heavy metals in the environment. We carried out a study to evaluate adsorption characteristics of metallic ions (Cr 3+ , Pb 2+ and Cu 2+ ) as sole sorbates as well as in coexistence onto clay extracts of Vertic-Luvisol and Ferralic-Arenosol, the generally under-researched yet wide-spread semi-arid soils. Additionally, sorption kinetics of these heavy metals was evaluated in these soils. Equilibrium sorption data for both non-competitive and competitive metal systems were found to obey the Langmuir isotherm. Overall metal loading capacity was higher in Vertic-Luvisol than Ferralic-Arenosol whereas metal-wise affinity to binding sites favoured sorption of Cr 3+ over Pb 2+ and Cu 2+ in that order. Contrary to the hypothesis of this study, the preferential sorption process was found to be driven by cationic properties as opposed to soil properties. Adsorption of metallic ions onto soils was significantly reduced in competitive systems than non-competitive systems, a phenomenon attributable to the antagonistic effects of coexisting species. Cr 3+ suppressed sorption of Pb 2+ and Cu 2+ on both soils as validated by the competitive adsorption capacity ratios which were < 1 in all instances where Cr 3+ coexisted with either one of Pb 2+ or Cu 2+ . The adsorption kinetics of metal ions in both soils followed the pseudo-second-order rate law, suggesting chemical sorption as the rate-limiting step of the adsorption process.

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Section: Sorption Kineticssupporting

confidence: 73%

Section: Langmuir Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sorption of Heavy Metals by Ferralic-Arenosol and Vertic-Luvisol: A Comparative Isothermal Study

Mosekiemang¹,

Dikinya²,

Toteng³

2014

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“…This may be due to competition between Pb and Cd for adsorption sites of soil colloids and stabilization agents when they are concurrently introduced to soils. It is reported that Pb has the ability to inhibit Cd sorption onto high-affinity adsorption sites of polyacrylamide [15] and soil colloids [20]. In the study performed by [20], Pb was shown to be less exchangeable than Cd and inhibited Cd sorption.…”

Section: Discussionmentioning

confidence: 97%

“…It is reported that Pb has the ability to inhibit Cd sorption onto high-affinity adsorption sites of polyacrylamide [15] and soil colloids [20]. In the study performed by [20], Pb was shown to be less exchangeable than Cd and inhibited Cd sorption. Cadmium had little effect on Pb sorption at exchange sites of soils and sediments.…”

Section: Discussionmentioning

confidence: 97%

Effect of Modified Polyacrylamide on Plant-Availability of Cd and Pb to Corn in Polluted Soils

Shirani¹,

Hosseini²,

Hamidpour³

et al. 2016

Pol. J. Environ. Stud.

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Wastewaters decontamination: Mechanisms of PB(II), ZN(II), and CD(II) competitive adsorption on tunisian smectite in single and multi‐solute systems

Eloussaief

Hamza

Kallel

et al. 2012

Env Prog and Sustain Energy

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Polluted water may contain more than one heavy metal species. Consequently, the behavior of a particular metal in a water system may be affected by the presence of the others. In this study, the adsorption of Pb(II), Zn(II), and Cd(II) in single and multi‐element systems onto raw, acid‐activated, and aluminum‐pillared Tunisian smectite (RSM, ASM, and Al‐SM, respectively) was investigated as a function of pH and species concentrations. Physico‐chemical, Textural, XRD, and SEM analyses were investigated onto three different clay materials. The Al‐SM samples, which were calcined at 450°C, presented the best results for the surface areas (267 m2/g) and for the Pb(II) adsorption capacity (75.35 mg/g). For instance, once they contained in a batch system at 25°C, pH 6, they retained more heavy metals due to their textural characteristics. The selected order of adsorption Pb(II) > Zn(II) > Cd(II) showed the importance of the competitive phenomenon onto clay materials' pores adsorption. At a higher pH, the precipitation phenomenon was possible. The two‐site, Langmuir isotherm also yielded the best fit for Pb(II) and Zn(II) adsorption on RSM and Al‐SM in binary and ternary solute‐systems. However, it failed in the case of Pb(II), Zn(II), and Cd(II) on ASM, which had less heterogeneity than other samples. The obtained results can serve as baseline data to design an adsorption process using this local adsorbent for the wastewaters rich in heavy metals. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 229‐238, 2013

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Sequential sorption of lead and cadmium in three tropical soils

Cited by 68 publications

References 41 publications

Sorption of Heavy Metals by Ferralic-Arenosol and Vertic-Luvisol: A Comparative Isothermal Study

Sorption of Heavy Metals by Ferralic-Arenosol and Vertic-Luvisol: A Comparative Isothermal Study

Effect of Modified Polyacrylamide on Plant-Availability of Cd and Pb to Corn in Polluted Soils

Wastewaters decontamination: Mechanisms of PB(II), ZN(II), and CD(II) competitive adsorption on tunisian smectite in single and multi‐solute systems

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