Removal of Copper(II) and Zinc(II) Ions From Aqueous Solution by Chemical Treatment of Coal Fly Ash

Sočo, Eleonora; Kalembkiewicz, Jan

doi:10.5562/cca2646

Cited by 25 publications

(14 citation statements)

References 30 publications

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“…6 shows the effect of pH on the biosorption of Zn(II) on groundnut shell, the lower adsorption observed at low pH may be as a result of strong competition between metal ions and H + ions for the active sites on the surface, as the pH increases the corresponding increase in the percentage removal may be as a result of deprotonation of the active site, leading to more site being available for metal ion removal. At pH 7, the increase in removal can also be attributed to the precipitation of the Zn(II) out of the solution, similar observation was also been reported [37]. Fig.…”

Section: Effect Of Hydrogen Ion Concentrationssupporting

confidence: 86%

Agro waste material as ecofriendly adsorbent for the removal of Zn(II): isotherm, kinetic, thermodynamic and optimization studies

Idowu¹,

Temilade²,

Peter³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tContamination of environment by heavy metals posed significant threat to human, animals and plants health due their accumulation in the living tissues and their non-degradability. Excess of zinc in living system is detrimental to health adverse effects therefore; this work investigates the feasibility of removal of Zn 2+ from aqueous solution using agricultural biowaste adsorbent prepared from groundnut shell. Effects of some important parameters such as pH, initial metal concentrations, temperature and adsorbent dosage on adsorption process were investigated. These factors were optimized by Box-Behnken experimental design using Design Expert 6.0. The prepared biosorbent was characterized using Scanning electron microscopy (SEM), Fourier Transform Infrared (FT-IR) and X-ray dispersion (XRD). Data from kinetic study was analyzed with pseudo-first-order and pseudo-second-order kinetic models while equilibrium data were evaluated using Langmuir and Freundlich isotherm models. The surface morphology of groundnut shell revealed porous pores indicatives of available sites for sorption of metal ion on the surface of the groundnut shell. The adsorption kinetics of the metals ions followed pseudo-first-order with average rate constants of 5.63 × 10 -2 . Langmuir adsorption isotherm fitted the isotherm study with R 2 >0.9 while the maximum adsorption capacities of 23.46 mg g -1 . Negative values of ΔG° obtained from thermodynamic evaluations revealed that the adsorption process is spontaneous. The values ΔH° and ΔS° obtained respectively are 29.90 and 105 J mol -1 K -1 . Prediction of regression models was in good agreement with experimental result. This study showed that groundnut shell to be a good adsorbent for the removal of Zn(II) from aqueous solution.

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Section: Effect Of Hydrogen Ion Concentrationssupporting

confidence: 86%

Agro waste material as ecofriendly adsorbent for the removal of Zn(II): isotherm, kinetic, thermodynamic and optimization studies

Idowu¹,

Temilade²,

Peter³

et al. 2019

Desalination and Water Treatment

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“…The point of zero charge (PZC) was determined using the solid addition method [43]. Suspensions of 0.5 g of biomass ash were put into contact with 50 mL of 0.1 M NaNO 3 solutions with different pH values (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14), adjusted with HNO 3 and NaOH.…”

Section: Point Of Zero Charge Of Biomass Ashmentioning

confidence: 99%

The Physicochemical Properties and Composition of Biomass Ash and Evaluating Directions of its Applications

Kalembkiewicz¹,

Galas²,

Sitarz-Palczak³

2018

Pol. J. Environ. Stud.

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“…The activation was carried out in a closed round-bottomed flask reflux condenser and mixed for 12 h at 100 • C. The obtained FA-H 2 O 2 was decanted, filtered and repeatedly washed with distilled water until the pH of the filtrate dropped to the pH of distilled water. Next, the FA-H 2 O 2 was dried in an electric dryer at a temperature of 105 • C for 24 h [15].…”

Section: Fly Ash Sample and Its Modificationmentioning

confidence: 99%

“…Coal fly ash has potential as a source in the production of synthetic zeolite-the effective sorbent for nickel removal from water [10]. In recent years, there has been growing interest in the search for cheaper sources, such as low-cost adsorbent materials, for the immobilization of dyes and heavy metals from mixtures [11][12][13][14][15][16][17]. For this reason, there are studies on the utilization of this solid waste [18][19][20][21][22] for the removal of heavy metals [23][24][25] and dyes [26][27][28] from polluted waters.…”

Section: Introductionmentioning

confidence: 99%

Novel Application of Mineral By-Products Obtained from the Combustion of Bituminous Coal–Fly Ash in Chemical Engineering

2020

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The aim of this work was the chemical modification of mineral by-products obtained from the combustion of bituminous coal (FA) treated with hydrogen peroxide (30%), used as an adsorbent for the removal of Cr(III) and Cd(II) ions and crystal violet (CV) from a mixture of heavy metal and organic dye in a solution containing either Cr(III)–CV or Cd(II)–CV. Fourier transform infrared (FT-IR), thermogravimetric analysis (TG), scanning electron microscopy–energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD) analyses suggested that the mechanism of Cr(III)–CV or Cd(II)–CV sorption onto FA–H2O2 includes ion-exchange and surface adsorption processes. The effect of pH on the adsorption equilibrium was studied. The maximum adsorption was found for pH values of 9. The values of the reduced chi-square test (χ2/degree of freedom (DoF)) and the determination coefficient R2 obtained for the sorbate of the considered isotherms were compared. Studies of equilibrium in a bi-component system by means of the extended Langmuir (EL), extended Langmuir–Freundlich (ELF), and Jain–Snoeyink (JS) models were conducted. The estimation of parameters of sorption isotherms in a bi-component system, either Cr(III)–CV or Cd(II)–CV, showed that the best-fitting calculated values of experimental data for both sorbates were obtained with the JS model (Cr(III) or CV) and the EL model (Cd(II) or CV). The maximum monolayer adsorption capacities of FA–H2O2 were found to be 775, 570 and 433 mg·g−1 for Cr, Cd and CV, respectively. Purification water containing direct Cr(III) or Cd(II) ions and CV was made with 90%, 98% and 80% efficiency, respectively, after 1.5 h. It was found that the chemical enhancement of FA from coal combustion by H2O2 treatment yields an effective and economically feasible material in chemical engineering for the treatment of effluents containing basic dyes and Cr(III) and Cd(II) ions.

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Removal of Copper(II) and Zinc(II) Ions From Aqueous Solution by Chemical Treatment of Coal Fly Ash

Cited by 25 publications

References 30 publications

Agro waste material as ecofriendly adsorbent for the removal of Zn(II): isotherm, kinetic, thermodynamic and optimization studies

Agro waste material as ecofriendly adsorbent for the removal of Zn(II): isotherm, kinetic, thermodynamic and optimization studies

The Physicochemical Properties and Composition of Biomass Ash and Evaluating Directions of its Applications

Novel Application of Mineral By-Products Obtained from the Combustion of Bituminous Coal–Fly Ash in Chemical Engineering

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