Kinetic and isothermal studies of lead ion adsorption onto palygorskite clay

Chen, Hao; Wang, Aiqin

doi:10.1016/j.jcis.2006.10.054

Cited by 222 publications

(120 citation statements)

References 27 publications

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“…Thus, a plot of t/q t against t should give a linear relationship with a slope of 1/q e . These results agree with same results reported before [10,23].…”

Section: Adsorption Kineticsupporting

confidence: 94%

Removal of lead from aqueous solutions using Saudi activated bentonite

Al-Shahrani

2010

WIT Transactions on Ecology and the Environment

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Raw Saudi bentonite which was obtained from the Khulays bentonite deposit, 95 km north of Jeddah, was ground to -325 mesh (44 m). Samples of ground bentonite were activated using sulfuric acid in order to increase its adsorptive capacity. The removal characteristics of lead ions from aqueous solution using Saudi activated bentonite were investigated under various operating variables such as shaking time, solution pH and initial metal concentration. The results showed that the sorption of lead ions on Saudi activated clay was very fast and the equilibrium was reached after only 10 min. They also showed that increasing the initial lead concentration decreased lead removal percentage due to the saturation of clay with lead ions. Furthermore, the adsorption of lead increases from 20 to 100% with an increase in solution pH from 1 to 5.0 and then 100% lead was removed when solution pH was from 5 to 11. The adsorption isotherm data were well fitted well with Langmuir better than Freundlich models. Lead adsorption onto Saudi activated bentonite was well represented by the pseudosecond-order kinetic model.

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“…Thus, a plot of t/q t against t should give a linear relationship with a slope of 1/q e . These results agree with same results reported before [10,23].…”

Section: Adsorption Kineticsupporting

confidence: 94%

Removal of lead from aqueous solutions using Saudi activated bentonite

Al-Shahrani

2010

WIT Transactions on Ecology and the Environment

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“…Hsu [12] and Bishnoi et al [13] attributed the increase in cationic uptake by WBC to the increase in negative charge on the surface of the adsorbent that promotes ionic interaction between adsorbate and the sorbate. These findings have also been confirmed by Nharingo et al [14] Ibrahim et al [15] Chen and Wang [16] Jiang et al [17] Chaari et al [18] and Unuabonah et al [19].…”

Section: +supporting

confidence: 77%

Effectiveness of Biopolymer-Bentonite Clay Composites in Wastewater Treatment

Mupasi¹,

Dube²,

Chiririwa³

et al. 2018

Asian J. Chem.

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The feasibility of employing wood-bentonite clay composite material as a low-cost and effective adsorbent for removal of cations from wastewater has been investigated. The wood-bentonite clay composites were prepared by a solution intercalation method. Results showed that the percentage adsorption of Pb 2+ , Mg 2+ and Ca 2+ from the effluent water was 88.46, 81.12 and 95.76 % respectively, using 10 g/L of the adsorbent. The desorbed wood-bentonite clay composites could be reused for adsorption of the cations.

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“…It is obvious that the amount of adsorbent can play an important role in the adsorption process (24,25). Figure 3B and C show the relationship between the amount of adsorbent with pH and temperature.…”

Section: Adsorbentmentioning

confidence: 99%