Adsorption of chromium supported with various column modelling studies through the synergistic influence of Aspergillus and cellulose

Sathvika, T.; Manasi,; Rajesh, Vidya; Rajesh, N.

doi:10.1016/j.jece.2016.06.027

Cited by 27 publications

(15 citation statements)

References 54 publications

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“…Implementation of batch sorption in full-scale or continuous processes requires kinetic data for determining the stages of the transport mechanism [34][35][36]. In the present study, pseudo-first-order (PSO-1) and pseudo-second-order kinetic (PSO-2) models have been used to fit the sorption data for providing kinetic data (Table 4).…”

Section: Adsorption Kinetic Modelsmentioning

confidence: 99%

Batch Study of Cadmium Biosorption by Carbon Dioxide Enriched Aphanothece sp. Dried Biomass

Satya

Harimawan

Haryani

et al. 2020

Water

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The conventional method for cadmium removal in aqueous solutions (1–100 mg/L) is ineffective and inefficient. Therefore, a batch biosorption reactor using a local freshwater microalga (originating from an urban lake, namely, Situ Rawa Kalong-Depok) as dried biosorbent was tested. Biosorbent made from three kinds of cyanobacterium Aphanothece sp. cultivars (A0, A8, and A15) were used to eliminate cadmium (Cd2+) ions in aqueous solution (1–7 mg/L). The biosorbents were harvested from a photobioreactor system enriched with carbon dioxide gas of 0.04% (atmospheric), 8%, and 15% under continuous light illumination of about 5700–6000 lux for 14 d of cultivation. Produced dried biosorbents had Brunauer–Emmet–Teller (BET) surface area ranges of 0.571–1.846 m2/g. Biosorption of Cd2+ was pH and concentration dependent. Sorption was spontaneous (ΔG = −8.39 to −10.88 kJ/mol), exothermic (ΔH = −41.85 to −49.16 kJ/mol), and decreased randomness (ΔS = −0.102 to −0.126 kJ/mol. K) on the interface between solid and liquid phases when the process was completed. The kinetic sorption data fitted best to the pseudo-second-order model (k2 = 2.79 × 10−2, 3.96 × 10−2, and 4.54 × 10−2 g/mg.min). The dried biosorbents of A0, A8, and A15, after modeling with the Langmuir and Dubinin–Radushkevich isotherm models, indicated that cadmium binding occurred through chemisorption (qmax, D-R = 9.74 × 10−4, 4.79 × 10−3, and 9.12 × 10−3 mol/g and mean free energy of 8.45, 11.18, and 11.18 kJ/mol) on the monolayer and homogenous surface (qmax, Langmuir of 12.24, 36.90, and 60.24 mg/g). In addition, the results of SEM, EDX, and FTIR showed that there were at least nine functional groups that interacted with Cd2+ (led to bond formation) after biosorption through cation exchange mechanisms, and morphologically the surfaces changed after biosorption. Biosorbent A15 indicated the best resilient features over three cycles of sorption–desorption using 1 M HCl as the desorbing eluent. These biosorbents can be a potent and eco-friendly material for treating aqueous wastewater.

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Section: Adsorption Kinetic Modelsmentioning

confidence: 99%

Batch Study of Cadmium Biosorption by Carbon Dioxide Enriched Aphanothece sp. Dried Biomass

Satya

Harimawan

Haryani

et al. 2020

Water

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“…The Van't Hoff plot that connects lnK and 1/T is shown in Figure f and the significant thermodynamic parameters are tabulated in Table . The negative ΔG showed the adsorption mechanism was spontaneous and negative values of enthalpy and also the activation energy (E a =ΔH o ads +RT) indicates a physico‐chemical exothermic adsorption . The enthalpically favourable process is driven by the exergonic free energy change (ΔG 0 ) while the negative entropy indicates the decrease in randomness at the AMF‐clay adsorbent surface.…”

Section: Resultsmentioning

confidence: 99%

“…Some recently reported biosorbents for the sequestration of Cr(VI) include Saccharomyces cerevisiae immobilized in crosslinked cellulose, and the active biomass of Rhizobium leguminosarum . Aspergillus BRVR immobilized in sodium montmorillonite and cellulose are also known to be quite effective in adsorbing Cr(VI). The adsorption coupled reduction of Cr(VI) using dead biomass of Aspergillus niger was reported by Park et al…”

Section: Introductionmentioning

confidence: 99%

Leveraging the Potential of Endomycorrhizal Spores and Montmorillonite for Hexavalent Chromium Adsorption from Aqueous Phase

et al. 2018

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Multidisciplinary approach involving biotechnology and chemistry opens up avenues to develop adsorbent materials that can be very useful to alleviate heavy metal toxicity. Towards this direction, we have explored the potential of endomycorrizhal fungal spores in conjunction with a clay mineral as a novel approach for chromium (VI) adsorption. The immobilization of AMF (Arbuscular Mycorrhizal fungus) spores in montmorillonite (in its Na+ form) provides a good platform to adsorb hexavalent chromium. The adsorption was observed at pH 2.0‐3.0 involving the electrostatic interaction between the functional groups present in the fungi‐clay biosorbent surface and tetraoxohydrochromate (VI) anion. Diverse characterization techniques such as Fourier Transform‐Infrared spectroscopy (FTIR), X‐ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), confocal microscopy and X‐ray fluorescence (XRF) were used to observe the interaction of chromium with the biosorbent. Batch adsorption studies involving the experimental variables such as pH variation, kinetics, isotherms and thermodynamics were performed. Pseudo second order kinetics coupled with a Langmuir adsorption capacity of 11.185 mg g−1was realized for this biosorption process. The biosorbent was stable and regenerated for three adsorption‐desorption cycles using sodium hydroxide.

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“…Research carried out by Biswas and Mishra has also found that an increase in the withdrawal rate reduces the adsorbent-adsorbate contact time [40]. And, according to Sathvika et al, low flows increase the adsorption efficiency and increase the contact time between chromium VI solution and the biosorbent used [41]. Figure 8 shows the effect of sand bed height on the rate of effluent discolouration.…”

Section: Effect Of Flow Rate On Effluent Discolourationmentioning

confidence: 95%

Continuous Adsorption Modeling and Fixed Bed Column Studies: Adsorption of Tannery Wastewater Pollutants Using Beach Sand

Mouhri

Merzouki²,

Belhassan³

et al. 2020

Journal of Chemistry

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is study deals with the removal of residual pollutants from tanning wastewater by continuous adsorption mechanism, using local sand as a low-cost adsorbent. e possibility of pretreating a complex tannery effluent heavily loaded with a natural material such as sand is significant. e characterization of the adsorbent before and after continuous adsorption was performed by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Column studies were also carried out to evaluate the performance of the adsorbent and the efficiency of column adsorption. e adsorption kinetic rate seems to be strongly influenced by certain parameters such as the particle size of the material used, the withdrawal rate of the influent and the height of the adsorbent bed, and optimized parameters were found to be 63 μm, 15 ml·min − 1 , and 7 cm, respectively, and the color removal has achieved maximum values which vary between 95 and 100%. e results suggest that sand can be used as an economical adsorbent for the removal of color from the wastewater of the tanning industries.

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Adsorption of chromium supported with various column modelling studies through the synergistic influence of Aspergillus and cellulose

Cited by 27 publications

References 54 publications

Batch Study of Cadmium Biosorption by Carbon Dioxide Enriched Aphanothece sp. Dried Biomass

Batch Study of Cadmium Biosorption by Carbon Dioxide Enriched Aphanothece sp. Dried Biomass

Leveraging the Potential of Endomycorrhizal Spores and Montmorillonite for Hexavalent Chromium Adsorption from Aqueous Phase

Continuous Adsorption Modeling and Fixed Bed Column Studies: Adsorption of Tannery Wastewater Pollutants Using Beach Sand

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