Biosorption of hexavalent chromium from aqueous solution onto pomegranate seeds: kinetic modeling studies

Ghaneian, Mohammad Taghi; Bhatnagar, Amit; Ehrampoush, Mohammad Hassan; Amrollahi, Mohammad Ali; Jamshidi, Behzad; Dehvari, Mahboobeh; Taghavi, Mahmoud

doi:10.1007/s13762-016-1216-8

Cited by 47 publications

(25 citation statements)

References 29 publications

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“…However, if the errors in q e predicted and q e observed is more, modified Pseudo-first order kinetic model will Pseudo-second order kinetic model is given in [6,29,31,32,33]…”

Section: Biosorption Kineticsmentioning

confidence: 99%

“…where q e and q t are the amount of sorbate adsorbed on sorbent at equilibrium and at time 't' respectively in mg/g. k 1 and k 2 are the first order (1/min) and second order reaction rate equilibrium constant (g/mg•min) respectively [31]. k 1m is the modified first order reaction rate constant [31].…”

Section: Biosorption Kineticsmentioning

confidence: 99%

“…k 1 and k 2 are the first order (1/min) and second order reaction rate equilibrium constant (g/mg•min) respectively [31]. k 1m is the modified first order reaction rate constant [31]. α and β are the initial adsorption rate (mg/g min) and the desorption constant (g/mg) based on the availability of adsorption surface and activation energy for chemisorption [31].…”

Section: Biosorption Kineticsmentioning

confidence: 99%

“…k 1m is the modified first order reaction rate constant [31]. α and β are the initial adsorption rate (mg/g min) and the desorption constant (g/mg) based on the availability of adsorption surface and activation energy for chemisorption [31]. 1/β value shows the number of sites available for adsorption whereas the value of 1 β αβ ln ( ) indicates the adsorption quantity.…”

Section: Biosorption Kineticsmentioning

confidence: 99%

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Biosorption - a case study of hexavalent chromium removal with raw pomegranate peel

Salam¹,

Anantharaman²

2019

DWT

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Biosorptive removal of heavy metals from water is an eco-friendly green technology. In this study, raw pomegranate (Punicagranatum L.) peel (RPP), without any modification or activation, was used as biosorbent for the removal of chromium (Cr(VI)). The influence of operating parameters such as pH, contact time, temperature and concentration of Cr(VI) were studied in batch mode. A maximum removal of 100% was achieved for a Cr(VI) solution of concentration 20 mg/L at an optimum pH and temperature of 2 and 313 K respectively in 3 min. Among the isotherms tested, Langmuir adsorption isotherm has good correlation with experimental data. A maximum Cr(VI) biosorption capacity of 370.4 mg/g was observed at 313K under equilibrium conditions. RPP is also effective in the removal of Cr(VI) at higher concentrations. Among the kinetic models, pseudo-second order kinetic model fits the data well. The thermodynamic study reveals that the endothermic biosorption taking place on RPP is physico-chemical in nature. The biosorption mechanism of RPP with Cr(VI) indicates that intra-particle diffusion is not the only rate limiting step and film diffusion also plays a major role in biosorption.

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“…However, if the errors in q e predicted and q e observed is more, modified Pseudo-first order kinetic model will Pseudo-second order kinetic model is given in [6,29,31,32,33]…”

Section: Biosorption Kineticsmentioning

confidence: 99%

Section: Biosorption Kineticsmentioning

confidence: 99%

Section: Biosorption Kineticsmentioning

confidence: 99%

Section: Biosorption Kineticsmentioning

confidence: 99%

See 2 more Smart Citations

Biosorption - a case study of hexavalent chromium removal with raw pomegranate peel

Salam¹,

Anantharaman²

2019

DWT

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“…The maximum adsorption capacity of CA–PCL/CS nanofibers for the removal of Cr(VI) was 126 mg g −1 , which was higher than most of the reported adsorbents . The adsorption capacity of CA–PCL/CS nanofibers was as high as that of pure CS nanofibers reported in the literature .…”

Section: Resultsmentioning

confidence: 59%

Electrospun Cellulose Acetate–Polycaprolactone/Chitosan Core–Shell Nanofibers for the Removal of Cr(VI)

Shi

Zhang

et al. 2019

Physica Status Solidi (a)

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Core-shell-structured cellulose acetate-polycaprolactone/chitosan (CA-PCL/CS) nanofibers with excellent removal performance of hexavalent chromium (Cr(VI)) are developed by coaxial electrospinning. The effect of core-to-shell ratio on adsorption capability is studied. The results show that all core-shell-structured fibers possess higher adsorption capability and good durability in acidic environment compared with the CS powder adsorbent. CA-PCL/CS fibers with coreto-shell ratio of 0.442 have a maximum adsorption capability of 126 mg g À1 at room temperature. The adsorption kinetics reveals that chemisorption serves as the rate-determining step by notable electron transfer, share, or exchange between adsorbents and adsorbates. The adsorption equilibrium data of the core-shell-structured CA-PCL/CS fiber adsorbents are all well described by the Freundlich isotherm model, indicating the multilayer adsorption process. Herein, it is highlighted that the core-shell-structured CA-PCL/CS nanofibers have a promising prospect in removing Cr(VI) ions from waste water.

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Kinetic studies on the removal of cadmium using Acacia tortilis

Sivaprakash

Rajamohan

Qasmi

2020

Environmental Quality Mgmt

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In this study, the feasibility of utilizing Acacia tortilis biomass for the removal of cadmium ions was investigated. The effect of operating parameters, namely, initial pH (1-10), cadmium concentration (50-200 mg/L), biosorbent dose (0.5-4.0 g/L), and agitation speed (0-400 rpm), on the cadmium removal was investigated. Maximum removal efficiency was attained at pH 5.0, at an equilibrium time of 180 min. The maximum cadmium uptake achieved with 200 mg/L initial concentration was 36.66 mg/g. The mechanism of biosorption was analyzed using the pseudo-first-order, pseudosecond-order, and intraparticle diffusion models. The pseudo-first-order model represented the data well (R 2 > 0.993), and the maximum uptake capacity was 45.83 mg/g at 30 • C with 200 mg/L manganese concentration. Desorption studies confirmed the suitability of sulfuric acid as an eluent producing recoveries in excess of 90% for cadmium up to four cycles.

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Biosorption of hexavalent chromium from aqueous solution onto pomegranate seeds: kinetic modeling studies

Cited by 47 publications

References 29 publications

Biosorption - a case study of hexavalent chromium removal with raw pomegranate peel

Biosorption - a case study of hexavalent chromium removal with raw pomegranate peel

Electrospun Cellulose Acetate–Polycaprolactone/Chitosan Core–Shell Nanofibers for the Removal of Cr(VI)

Kinetic studies on the removal of cadmium using Acacia tortilis

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