Application of response surface methodology for Cd(II) adsorption on maize tassel-magnetite nanohybrid adsorbent

Guyo, Upenyu; Makawa, Tafadzwa; Moyo, Mambo; Nharingo, Tichaona; Nyamunda, Benias C.; Mugadza, Tawanda

doi:10.1016/j.jece.2015.09.006

Cited by 55 publications

(18 citation statements)

References 45 publications

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“…Maize tassels were collected from a local farm in Gweru, Zimbabwe. The maize tassels were pretreated and carbonized as reported elsewhere [16,21]. To modify the activated carbon with tartaric acid, activated carbon (50 g) was mixed with 600 mL of 0.5 M tartaric acid.…”

Section: Preparation Of Tartaric Acid Modified Activated Carbon (Tac)mentioning

confidence: 99%

“…A number of materials have been fabricated and explored for their capability to remove Cd(II) from wastewaters. These adsorbents include activated carbon [10,11], carbon nanotubes [12][13][14], magnetite hybrids [11,[15][16][17][18], biopolymers [8], and polymers [19,20]. In our previous studies, we explored the use of maize tassels and showed that it can be used as a precursor in the fabrication of potential adsorbents for removing Cd(II) ions from wastewaters [21].…”

Section: Introductionmentioning

confidence: 99%

“…The maximum adsorption capacity obtained was however unsatisfactory and could be improved. The situation led us to consider the fabrication of maize tassel nanohybrid composites [16]. This technology showed enhanced Cd(II) removal relative to the former though could be better.…”

Section: Introductionmentioning

confidence: 99%

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Response surface methodology for optimization of Cd(II) adsorption from wastewaters by fabricated tartaric acid-maize tassel magnetic hybrid sorbent

2019

Biointerface Res Appl Chem

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Maize tassels (MT), an agro-based biomass waste was carbonised followed by thermo-chemical modification using tartaric acid. The functionalized activated carbon was further modified to yield a magnetic hybrid composite adsorbent. The adsorbent was characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The adsorbent was evaluated for its efficiency to remove Cd(II) ions from aqueous solutions through batch adsorption studies following a Central Composite Design. Effects of solution pH, contact time, adsorbent dosage, initial metal concentration and temperature on Cd(II) adsorption were investigated. Optimization of the adsorption process was done using desirability function on the Design Expert V11 software. The desirability function showed that the optimum parameters were pH 5.29, contact time (67.50 min), dosage (0.575 g) and initial concentration (152.50 mg/L). The adsorption process was analysed using kinetic and isotherm models. The kinetics of the adsorption process followed the pseudo-second-order model (lowest sum of square error (SSE) values and correlation coefficients (R2) > 0.999) in addition to the intraparticle diffusion model. The isotherm data were consistent with the Langmuir isotherm as evidenced by the highest correlation coefficient (R2= 0.998). The thermodynamic parameters showed that the process was endothermic and spontaneous in nature. The adsorption capacity of the adsorbent was found to be 188.68 mg/g at 20 ⁰C which is higher than that of the previously reported magnetic maize tassel hybrid (52.05 mg/g). The adsorbent showed good removal efficiency on real effluent samples.

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Section: Preparation Of Tartaric Acid Modified Activated Carbon (Tac)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response surface methodology for optimization of Cd(II) adsorption from wastewaters by fabricated tartaric acid-maize tassel magnetic hybrid sorbent

2019

Biointerface Res Appl Chem

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“…Besides, the peak around 1400 cm −1 could be corresponding to the ammonium salts loaded on BC generated by the reaction between Si-NH 2 and CuSO 4 during the modification. 32,33 The typical surface morphologies and elementary composition of BC and BC-Cu/Si-NH 2 were visualized by SEM and EDS respectively. Figure 3(a) exhibited that the surface of pristine BC was quite smooth and pretty porous, while the surface became much rougher and had abundant pores after modification [ Figure 3 SAPT explored the stoichiometric point (V e ), the point of zero charge (pH pzc ), and the concentration of active sites on surface (H s ) by Gran plot.…”

Section: Characterization Of the Adsorbentsmentioning

confidence: 99%

Bamboo charcoal modified with Cu²⁺ and 3‐aminopropyl trimethoxy silane for the adsorption of acid fuchsin dye: Optimization by response surface methodology and the adsorption mechanism

Zhang

Peng

2019

J of Applied Polymer Sci

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The bamboo charcoal modified with Cu2+ and 3‐aminopropyl trimethoxy silane (BC‐Cu/Si‐NH2) was synthesized and characterized by X‐ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, and surface acid–base potentiometric titration. The adsorption for acid fuchsin (AF) dyes onto BC‐Cu/Si‐NH2 was investigated. Moreover, response surface methodology was performed to optimize the process parameters including pH, initial dye concentration, adsorbent dosage, and temperature. The results presented that the adsorption process was mainly influenced by initial AF concentration and adsorbent dosage. Isotherm studies revealed that the adsorption data fitted well with the Sips model and Dubinin–Radushkevich (D–R) model, which indicated the monolayer, homogeneous, and physical nature of the adsorption process. The maximum adsorption capacity calculated from D–R model could approach approximately to 14.91 mg g−1 at 40 °C, and the maximum adsorption capacity of Sips reached to 10.77 mg g−1 at 40 °C. The kinetic experimental data matched well with Spahn and Schlunder model as well as pseudo‐second‐order model. In addition, intraparticle diffusion was not the only rate‐controlling step of adsorption process. Thermodynamic parameters revealed the feasibility, spontaneity, and endothermic nature of adsorption. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47728.

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“…FTIR spectroscopy identified the functional groups present [19,20] and was used to confirm the formation of PAAC. The comparative FTIR analysis for PA, AC and modified AC ( Fig.…”

Section: Ftir Spectroscopic Studiesmentioning

confidence: 99%

Enhanced sorption of aqueous cadmium (II) ions on phenylalanine modified activated carbon

Chikwanda¹,

Mugadza²,

Guyo³

2018

Proceedings of the EAI International Conference for Research, Innovation and Development for Africa

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Phenylalanine modified activated carbon sorbent (PAAC) was prepared and characterised using FTIR and XRD spectroscopic studies and scanning electron microscopy. The potential removal of Cd (II) ions from aqueous solutions using this sorbent was investigated through adsorptive experiments. The parameters evaluated in the batch studies included pH (2-9), PAAC dosage (0.1-1.2 g L −1 ), contact time (1-240 min), initial Cd (II) ion concentration (5-60 mg L -1 ) and temperature (10-50 o C). A dosage of 1.0 g L -1 of PAAC showed a near complete removal of 25 mg L -1 of the initial Cd (II) ion concentration from aqueous solution at pH 6 and a temperature of 25 o C. The equilibrium studies revealed that the experimental data fitted very well into the Langmuir isotherm model. Kinetic studies showed that the adsorption process followed pseudo-second-order and the thermodynamic parameters indicated that adsorption was spontaneous and endothermic in nature. Sorption results reveal that the PAAC is an efficient sorbent for the removal of Cd(II) ions from aqueous media.

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Application of response surface methodology for Cd(II) adsorption on maize tassel-magnetite nanohybrid adsorbent

Cited by 55 publications

References 45 publications

Response surface methodology for optimization of Cd(II) adsorption from wastewaters by fabricated tartaric acid-maize tassel magnetic hybrid sorbent

Response surface methodology for optimization of Cd(II) adsorption from wastewaters by fabricated tartaric acid-maize tassel magnetic hybrid sorbent

Bamboo charcoal modified with Cu²⁺ and 3‐aminopropyl trimethoxy silane for the adsorption of acid fuchsin dye: Optimization by response surface methodology and the adsorption mechanism

Enhanced sorption of aqueous cadmium (II) ions on phenylalanine modified activated carbon

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Application of response surface methodology for Cd(II) adsorption on maize tassel-magnetite nanohybrid adsorbent

Cited by 55 publications

References 45 publications

Response surface methodology for optimization of Cd(II) adsorption from wastewaters by fabricated tartaric acid-maize tassel magnetic hybrid sorbent

Response surface methodology for optimization of Cd(II) adsorption from wastewaters by fabricated tartaric acid-maize tassel magnetic hybrid sorbent

Bamboo charcoal modified with Cu2+ and 3‐aminopropyl trimethoxy silane for the adsorption of acid fuchsin dye: Optimization by response surface methodology and the adsorption mechanism

Enhanced sorption of aqueous cadmium (II) ions on phenylalanine modified activated carbon

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Product

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Bamboo charcoal modified with Cu²⁺ and 3‐aminopropyl trimethoxy silane for the adsorption of acid fuchsin dye: Optimization by response surface methodology and the adsorption mechanism