Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach

Rzig, Boutheina; Guesmi, Fatma; Hamrouni, Béchir

doi:10.2166/wst.2021.233

Cited by 28 publications

(14 citation statements)

References 86 publications

(70 reference statements)

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“…A temperature range of 50-800 °C was used with a thermal gradient of 20 °C/min under nitrogen. The pH of zero charge was found by mixing 0.15 g of biomass with 0.01 mol/L NaCl and dissolved in 100 mL of deionised water and then altering the pH to 2, 4.5, 7, 9.5 and 12 using 0.1 mol/L HCl and NaOH [26]. After 24 h, the new pH was recorded.…”

Section: Materials and Equipmentmentioning

confidence: 99%

“…There is evidence of hydroxyl, carbonyl, carboxyl, ester and aromatic groups, which are important for adsorption and explained in Sect. 3.1.5 [26].…”

Section: Ftirmentioning

confidence: 99%

“…The pH (PHZ) was about 4.75. This means that when pH is lower than 4.75, the biosorbent surface is positively charged and when the pH is above 4.75, the surface of pea haulm is negatively charged [26]. Since MB is cationic, it is expected that a negatively charged surface will promote adsorption.…”

Section: Ph Of Zero Chargementioning

confidence: 99%

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Agricultural Pea Waste as a Low-Cost Pollutant Biosorbent for Methylene Blue Removal: Adsorption Kinetics, Isotherm And Thermodynamic Studies

Holliday

Parsons

Zein

2022

Biomass Conv. Bioref.

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Biosorbents are an alternative pollutant adsorbent, usually sourced from waste biomass and requiring little to no treatment. This makes them cheaper than conventional adsorbents. In this paper, green pea (Pisum sativum) haulm was used as a biosorbent for the adsorption of methylene blue dye. The potential application of pea haulm as a biosorbent has not been investigated before. Characterisation using scanning electron microscopy, infrared spectroscopy and thermal gravitational analysis showed the surface to be coarse, detected functional groups important for adsorption and identified the composition of key biomass components. The effects of particle size, contact time, agitation, dosage, solution pH, temperature and initial dye concentration on the removal of MB by pea haulm were investigated. Using the data from these studies, the best fitting kinetic and isotherm models were found and the thermodynamic properties were identified. The maximum theoretical adsorption capacity was 167 mg/g, which was relatively high compared to other recent biosorbent studies. The pseudo-second-order adsorption kinetic and Freundlich adsorption isotherm models were the best fitting models. The biosorption process was exothermic and spontaneous at low temperatures. It was concluded that pea haulm was an effective adsorbent of methylene blue and could perhaps find application in wastewater treatment.

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Section: Materials and Equipmentmentioning

confidence: 99%

“…There is evidence of hydroxyl, carbonyl, carboxyl, ester and aromatic groups, which are important for adsorption and explained in Sect. 3.1.5 [26].…”

Section: Ftirmentioning

confidence: 99%

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Agricultural Pea Waste as a Low-Cost Pollutant Biosorbent for Methylene Blue Removal: Adsorption Kinetics, Isotherm And Thermodynamic Studies

Holliday

Parsons

Zein

2022

Biomass Conv. Bioref.

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“…CCD uses RSM for edifice a second order (quadratic) for response variable deprived of requiring to use wide-ranging three-level factorial experimentation [74]. The design consists of following CCD offers another to 3N designs in building a second-order model since the number of experiments is condensed as related to a full factorial design [75]. R-Squared is another critical term when discussing the system.…”

Section: Central Composite Design (Ccd)mentioning

confidence: 99%

Optimization, Statistical and Adsorption Analysis of Cr(VI) using Corn Industry Sludge: Kinetic and Isotherm Studies

Kerur

Hanagadakar

Nandi

et al. 2022

Preprint

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A novel, cost-effective activated carbon was prepared from local corn industry waste sludge to treat chromium (VI) ions from an aqueous solution. Adsorption is one of the promising techniques for treating chromium. The adsorption efficiency depends on temperature, pH, metal ion concentrations, contact time, and adsorbent dose. Activation increase the adsorbent sites on the surface of the adsorbent, and SEM micrographs indicate the adsorption sites before and after adsorption. IR spectrum of FT-IR spectrophotometer was used for analysis Investigation of equilibrium adsorption isotherm data reveals suitability of corn industry waste for treating chromium (VI) ions. The adsorption isotherm and kinetics of chromium (VI) adsorption indicate agreement of the experimental data to Frendulich isotherm and pseudo-second-order model and chemisorption as the reason for Cr(VI) removal. The corn industry waste is thermally activated by heating in a controlled atmosphere at 500° C. Kinetic data studies elucidated that adsorption tracks a pseudo-second-order kinetic model. The maximum adsorption capacity and adsorption efficiency of chromium (VI) were found to be 6.80 mg/g at were pH of 4 with a contact time of 150 min and 91.43% using 1.5 g of adsorbent. The outcomes of corn industry sludge as the advantage of low-cost material and an effective adsorbent for Cr (VI) removal. The statistical analysis of adsorption was studied through response surface methodology (RSM). The experimental and theoretical values for percentage adsorption of Cr were observed as 92.91% and 91.43%, respectively. The experimental results closely agree with the central composite design.

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“…Comparing these models with mass transfer rate is often found to best fit with Freundlich and Langmuir models [38].…”

Section: ■ Introductionmentioning

confidence: 99%

Surface Complexes of Cr(VI) by Eucalyptus Barks

et al. 2022

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The sorption mechanism of hexavalent chromium sorption on eucalyptus barks was evaluated as a function of solution pH for different adsorbent dosages, surface coverage, and the amount of adsorbent. The chromium retention was evaluated based on the distribution coefficient (D), and this retention is attributed to species, which is predominant between pH 1 and 6.5. The biosorption of Cr(VI) ions onto barks achieved at pH 2.0 in the highest sorbet conditions corresponding to [Cr(VI)] = 10–5 mol (V = 100 mL) is examined for various surface coverage. The surface complexes formed between chromate and eucalyptus barks were found to be > S (HCrO4) and > S (CrO4). Logarithmic stability for log K1–1 and the log K10 values of the complexes were measured and found to be -5.93 in acidic medium and -0.76 in alkaline medium, respectively. Pointed out that the adsorption of Cr(VI) on eucalyptus bark was greater than 90% in all cases, Cr(VI) recovery is strongly acidic dependent and shows maximum retention, for various sorbent amounts, at pH around 2, and this retention is attributed to species, which is predominant between pH 1 and 6.5, the morphological surface of eucalyptus barks were examined by Scanning Electron Microscope (SEM) connected to a micro analyzer EDS.

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Modelling and optimization of hexavalent chromium removal from aqueous solution by adsorption on low-cost agricultural waste biomass using response surface methodological approach

Cited by 28 publications

References 86 publications

Agricultural Pea Waste as a Low-Cost Pollutant Biosorbent for Methylene Blue Removal: Adsorption Kinetics, Isotherm And Thermodynamic Studies

Agricultural Pea Waste as a Low-Cost Pollutant Biosorbent for Methylene Blue Removal: Adsorption Kinetics, Isotherm And Thermodynamic Studies

Optimization, Statistical and Adsorption Analysis of Cr(VI) using Corn Industry Sludge: Kinetic and Isotherm Studies

Surface Complexes of Cr(VI) by Eucalyptus Barks

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