Adsorption of Cr(VI) on Iron(III) Cellulose Nanocomposite Bead

Sarkar, Mitali; Sarkar, Sushanta

doi:10.1007/s40710-017-0275-2

Cited by 11 publications

(12 citation statements)

References 44 publications

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“…As reported earlier with increase in agitation speed from 50 to 200 spm Cr(VI) retention increases progressively from 38 to 80% in case of C-ads (Sarkar and Sarkar, 2017) due to enhanced diffusion rate of solute (Bankar et al., 2009). Interestingly, in case of U-ads the retention was found to be higher (84%), even with the lower agitation speed (50 spm) and does not alter with increase in agitation speed (Fig.…”

Section: Resultssupporting

confidence: 72%

“…The physicochemical character of FeCNB was illustrated elsewhere (Sarkar and Sarkar, 2017). The porosity, degree of swelling and surface area values indicated the possible adsorption ability of FeCNB.…”

Section: Resultsmentioning

confidence: 99%

“…Considering the pH ZPC of FeCNB (7.58) and speciation of chromium it is expected that in the pH range of 3–6 higher retention occurs due to the electrostatic attraction between FeCNB-HCrO 4 − . In higher pH lesser retention is due to repulsive interaction between the adsorbent and the anionic Cr(VI) species (Sarkar and Sarkar, 2017). It is interesting to note that retention of total chromium [Cr(VI) + Cr(III)] does not differ from that of Cr(VI) indicating that FeCNB is specific for Cr(VI) adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…The beads were washed repeatedly with de-ionized water and stored under water at room temperature. The color and shape of the beads remain stable at least for 90 days (Sarkar and Sarkar, 2017).…”

Section: Methodsmentioning

confidence: 99%

“…The physicochemical, surface and thermal properties are evaluated for the characterization of the synthesized beads (Sarkar and Sarkar, 2017).…”

Section: Methodsmentioning

confidence: 99%

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Ultrasound assisted batch operation for the adsorption of hexavalent chromium onto engineered nanobiocomposite

Sarkar

2019

Heliyon

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The study demonstrates the comparative retention characteristics of chromium from aqueous environment on iron(III) cellulose nanocomposite bead under conventional (C-ads) and ultrasound assisted (U-ads) batch adsorption operation. Optimization of process parameters was achieved varying pH, contact/sonication time, initial Cr(VI) concentration, adsorbent dose at fixed solution temperature. Equilibrium was achieved within 5 h and 30 min of contact time in C-ads and U-ads respectively. Langmuir isotherm is found suitable in C-ads while Temkin in U-ads. Both the operation is aided by change in negative free energy, positive enthalpy and entropy. Ultrasound assisted adsorption is much favorable in terms of efficiency, feasibility, spontaneity and randomness. Both the operations follow more the second order than the first order kinetic model. The pore diffusion prevails more in case of U-ads while the surface adsorption in C-ads.

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Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The physicochemical, surface and thermal properties are evaluated for the characterization of the synthesized beads (Sarkar and Sarkar, 2017).…”

Section: Methodsmentioning

confidence: 99%

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Ultrasound assisted batch operation for the adsorption of hexavalent chromium onto engineered nanobiocomposite

Sarkar

2019

Heliyon

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Modification of Adansonia digitata Cellulose by Hydroxamic Acid: a Promising Resource for Removing Pb (II) Ions from Water

Adewuyi

2020

Environ. Process.

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Experiments on Fluometuron Removal from Simulated Agricultural Wastewater in Porous Media Filters

2021

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Six gravity filters were constructed and evaluated for the treatment of water contaminated with herbicide fluometuron. Two filter types in terms of feeding strategy (i.e., batch and continuous feeding strategies), three porous media (i.e., coarse gravel (CG), coarse zeolite (CZ) and fine zeolite (FZ)), and three hydraulic residence times (i.e., 1 day, 2 days and 4 days) were evaluated to find the best design and operation parameter in fluometuron removal by adsorption on the porous media. Batch experiments were also conducted and the experimental data were fitted to adsorption kinetic and isotherm models. Results showed that the experimental data fitted better to the pseudo-first-order model for the three porous media tested and the ranking order of the fluometuron adsorption capacities was FZ>CZ>CG. The results also showed that fluometuron adsorption capacities were better fitted to the Freundlich model for both CZ and FZ porous media, and in all cases, the 1/n value was less than 1 indicating that fluometuron adsorption on both media is a favorable physical process. According to the Freundlich model, the highest fluometuron adsorption was recorded for fine zeolite (2.29 mg/kg). The results of filter operation indicated that the FZ unit with continuous feeding strategy at HRT of 2 days and 4 days achieved the highest fluometuron removal (34.2%) and that the most important parameter affecting fluometuron removal is the hydraulic residence time. KeywordsPesticides • Hydraulic residence time • Gravity filters • Adsorption kinetic models • Freundlich and Langmuir isotherms Highlights • Batch and continuous gravity filters are used to remove fluometuron • Kinetic and isotherm models on fluometuron adsorption are presented • Adsorption on the porous media was the main process of herbicide removal • The hydraulic residence time (HRT) of 4 days was adequate for fluometuron removal • The FZ-C unit at HRT of 2 and 4 days showed the highest removal capacity * Zisis Vryzas

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Adsorption of Cr(VI) on Iron(III) Cellulose Nanocomposite Bead

Cited by 11 publications

References 44 publications

Ultrasound assisted batch operation for the adsorption of hexavalent chromium onto engineered nanobiocomposite

Ultrasound assisted batch operation for the adsorption of hexavalent chromium onto engineered nanobiocomposite

Modification of Adansonia digitata Cellulose by Hydroxamic Acid: a Promising Resource for Removing Pb (II) Ions from Water

Experiments on Fluometuron Removal from Simulated Agricultural Wastewater in Porous Media Filters

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