Adsorption of Pb(II) on a composite material prepared from polystyrene-alumina and activated carbon: Kinetic and thermodynamic studies

Rao, Rifaqat Ali Khan; Ikram, Shaista; Jamal, Anwar

doi:10.1007/bf03246548

Cited by 19 publications

(4 citation statements)

References 5 publications

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“…These results imply that ΔS 0 would increase when large molecules, such as BACs, are adsorbed on PAC. It is also reported that the removal reactions of heavy metals, dyes, and micropollutants using PAC were endothermic and presented positive ΔS 0 values [47][48][49].…”

Section: Thermodynamic Analysismentioning

confidence: 96%

Adsorption of benzalkonium chlorides onto powdered activated carbon: mechanisms and detoxification

Kim

Choe

Kim

et al. 2021

Environmental Engineering Research

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Because disinfectants have been essential during the COVID-19 pandemic, the global demand for benzalkonium chlorides (BACs) has significantly increased. BACs can inactivate coronaviruses, but are known as toxic. In this study, we investigated the adsorption mechanisms of BAC12, BAC14, and BAC16 in water using powdered activated carbon (PAC). The effects of the reaction time, pH, and temperature on the adsorption kinetics of BACs were examined. The adsorption reaction followed pseudo-second-order kinetics, and better fitted to the Langmuir isotherm than the Freundlich isotherm. The best adsorption of BACs was achieved at neutral pH conditions. Thermodynamic analysis revealed that adsorption of BACs onto PAC is a spontaneous and endothermic process. Competitive adsorption experiments revealed that BACs with longer alkyl chains were adsorbed more effectively onto PAC than shorter alkyl chain BACs, implying that, while the electrostatic interaction is an important adsorption mechanism for BAC12, van der Waals interaction plays a more important role during the adsorption of BAC14 and BAC16. Finally, we observed the partial detoxification (69%) BAC in adsorption treated water with PAC using a Microtox test.

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Section: Thermodynamic Analysismentioning

confidence: 96%

Adsorption of benzalkonium chlorides onto powdered activated carbon: mechanisms and detoxification

Kim

Choe

Kim

et al. 2021

Environmental Engineering Research

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“…Where (mg/L) and (mg/g) are a concentration of Pb and amount of adsorbed at equilibrium, qm (mg/g) and b represent the maximum adsorption capacity and coefficient of Langmuir is obtained from slope and intercept of the linear plot / vs . The constant (L/mg) is an empirical constant of the Freundlich isotherm, while indicates a value that is related to adsorption intensity (Rao, Ikram, & Ahmad, 2011).…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…This study obtained n > 1 for both hydroxyapatite and hydroxyapatite-SiO2 composite. Besides that, values of n between 1 and 10 describe beneficial adsorption (Rao et al, 2011).…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…The result shows that hydroxyapatite-SiO2 composite can effectively use as an adsorbent of Pb(II). Le et al, 2019Humelnicu, Ignat, & Suchea, 2015Humelnicu et al, 2015Adebisi, 2017Zhang, Luan, Chen, Ke, & Zhang (2019) Tazar & Ozer (2020 In this study In this study Adsorption Kinetic Adsorption kinetic models were studied to determine the mechanism of adsorption, control of adsorption steps such as chemical reactions, transport of mass, and kinetics adsorption (Rao et al, 2011). The pseudo-first-order and pseudo-second-order are used to describe kinetic models in this study.…”

Section: Adsorption Isothermmentioning

confidence: 99%

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Removal of Pb(II) using Hydroxyapatite from Golden Snail Shell (Pomacea canaliculata L.) Modified with Silica

Hariani

Riyanti

Fatma

et al. 2020

Molekul

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The composites of hydroxyapatite and SiO2 were successfully synthesized. The hydroxyapatite was prepared from golden snail shells (Pomacea canaliculata L). The hydroxyapatite and hydroxyapatite-SiO2 composites were characterized using XRD, FTIR, SEM-EDS. Furthermore, hydroxyapatite and hydroxyapatite-SiO2 composites were used to remove Pb(II) from aqueous solution. Various adsorption parameters such as pH of the solution, contact time, and initial Pb(II) concentration were used to study the adsorption process. The optimum pH of the solution for removal of Pb(II) by hydroxyapatite and hydroxyapatite-SiO2 composite at pH 6 and contact time at 60 minutes. Both adsorbents follow the Langmuir isotherm. The maximum adsorption capacity of the hydroxyapatite-SiO2 composite is greater compare to hydroxyapatite, respectively 135.14 and 123.46 mg/g. The pseudo-second order kinetic model had a correlation coefficient (R2) greater than the pseudo-first order so pseudo-second order kinetic is better to describe adsorption kinetics

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A chelating polymer resin: synthesis, characterization, adsorption and desorption performance for removal of Hg(II) from aqueous solution

Zhuo

Huang

et al. 2017

J IRAN CHEM SOC

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Adsorption of Pb(II) on a composite material prepared from polystyrene-alumina and activated carbon: Kinetic and thermodynamic studies

Cited by 19 publications

References 5 publications

Adsorption of benzalkonium chlorides onto powdered activated carbon: mechanisms and detoxification

Adsorption of benzalkonium chlorides onto powdered activated carbon: mechanisms and detoxification

Removal of Pb(II) using Hydroxyapatite from Golden Snail Shell (Pomacea canaliculata L.) Modified with Silica

A chelating polymer resin: synthesis, characterization, adsorption and desorption performance for removal of Hg(II) from aqueous solution

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