Removal of Zinc from Water by Adsorpion on Bentonite and Kaolin

Larakeb, Manal; Youcef, Leïla; Achour, Samia

doi:10.30958/ajs.4-1-4

Cited by 13 publications

(5 citation statements)

References 9 publications

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“…At lower pH values, significant hydrogen ions compete for empty adsorption sites of adsorbents, which causes this phenomenon. The low efficiency in acidic solutions (pH less than 7) might be attributed to increased competition for adsorption sites between H + and Zn 2+ [46]. Adsorption increased when solution pH increased because additional metal-binding sites with negative charges could be exposed, attracting metal ions with positive charges and causing adsorption onto the adsorbent surface [47].…”

Section: Factors Affection Adsorption Capacity 321 Effect Of Ph Against Zinc Removalmentioning

confidence: 99%

“…At the optimal adsorbent dose of D-WMR (1.5 mg/L), the maximum Zn 2+ removal was 85%. The increase in adsorbent dosage allows for more additional Zn 2+ ion adsorption sites, which explains the improvement in efficiency [46]. Furthermore, with larger adsorbent concentrations, this rise is attributable to the greater availability of exchangeable sites or surface area.…”

Section: Effect Of Adsorbent Dosage Concentration Against Zinc Removalmentioning

confidence: 99%

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Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

et al. 2021

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Sustainable wastewater treatment is one of the biggest issues of the 21st century. Metals such as Zn2+ have been released into the environment due to rapid industrial development. In this study, dried watermelon rind (D-WMR) is used as a low-cost adsorption material to assess natural adsorbents’ ability to remove Zn2+ from synthetic wastewater. D-WMR was characterized using scanning electron microscope (SEM) and X-ray fluorescence (XRF). According to the results of the analysis, the D-WMR has two colours, white and black, and a significant concentration of mesoporous silica (83.70%). Moreover, after three hours of contact time in a synthetic solution with 400 mg/L Zn2+ concentration at pH 8 and 30 to 40 °C, the highest adsorption capacity of Zn2+ onto 1.5 g D-WMR adsorbent dose with 150 μm particle size was 25 mg/g. The experimental equilibrium data of Zn2+ onto D-WMR was utilized to compare nonlinear and linear isotherm and kinetics models for parameter determination. The best models for fitting equilibrium data were nonlinear Langmuir and pseudo-second models with lower error functions. Consequently, the potential use of D-WMR as a natural adsorbent for Zn2+ removal was highlighted, and error analysis indicated that nonlinear models best explain the adsorption data.

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Section: Factors Affection Adsorption Capacity 321 Effect Of Ph Against Zinc Removalmentioning

confidence: 99%

Section: Effect Of Adsorbent Dosage Concentration Against Zinc Removalmentioning

confidence: 99%

Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

et al. 2021

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“…The adsorption capacity obtained for Zn(B) was 10.88 mg/g at 120 minutes. The adsorption capacity obtained by different authors varies between 3.24 and 11.84 mg/g [26][27][28] Zn(II) on bentonite, as function of the type of bentonite used in process.…”

Section: Effect Of Contact Timementioning

confidence: 99%

Romanian bentonite and fly ash characterization and their use in heavy metal “in-situ” immobilization in polluted soils

et al. 2017

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This article presents the characterization of the Romanian bentonite and fly ash, using different techniques: FAAS, XRD, FT-IR, SEM and EDAX and their evaluation as sorbents for heavy metals immobilization in polluted soils coming from mining and metallurgical activities. The applicability of bentonite and fly ash for Pb (II) and Zn (II) immobilization was studied using aqueous solutions of these metals. The influence of the pH and contact time were studied. The results shown that the Romanian bentonite and fly ash could be used for Pb (II) and Zn (II) immobilization in polluted soils from brownfields.

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“…With economic and technological development, water pollution is a common problem around the world, particularly in the textile, printing paper, pharmaceutical, food manufacturing industry, and in research laboratories [1][2][3]. Activated charcoal (AC) shows great capacity as adsorbent in water purification or industrial effluent treatment due to its high pore volume, large specific surface area, high degree of surface reactivity, and effective adsorption quality [4][5][6]. This adsorption method allows the removal of up to 90% of pollutants; however, the process efficiency will depend on the physicochemical properties of the adsorbent and adsorbate [7].…”

Section: Introductionmentioning

confidence: 99%

Coconut Shell Charcoal Adsorption to Remove Methyl Orange in Aqueous Solutions

Romer¹,

Santana²,

Bengoechea³

et al. 2022

Sorption - From Fundamentals to Applications

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Activated charcoal was prepared and characterized from residues of coconut peel (CACC) to remove by adsorption the Methyl Orange (AM) dye in aqueous solution. The charcoal was activated with phosphoric acid. The morphology and structure of the pores of the carbon obtained were analyzed by Scanning Electron Microscopy (SEM) and a surface analyzer. The adsorption data were evaluated by the BET, Langmuir and Freundlich isotherms, finding the Langmuir type I model. The surface area of the activated carbon was 526 m2/g with a pore volume of 0.234 cm3/g and an average pore diameter of 1.78 nm, according to BET, which indicates the presence of micropores. The calculated thermodynamic parameters showed that the adsorption of the AM dye in CACC is a spontaneous process at room temperature and that physisorption and chemisorption are probably involved. The adsorption tests were followed by UV–visible spectrophotometry. The effects of the adsorbate concentration (AM) and the heat treatment (450–500°C) with an air atmosphere were investigated, keeping constant the stirring time and the H3PO4/sample weight ratio. The results obtained indicate that the activated carbon obtained could be used as an alternative low-cost adsorbent in the removal of AM from effluents in aqueous solution.

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Removal of Zinc from Water by Adsorpion on Bentonite and Kaolin

Cited by 13 publications

References 9 publications

Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

Romanian bentonite and fly ash characterization and their use in heavy metal “in-situ” immobilization in polluted soils

Coconut Shell Charcoal Adsorption to Remove Methyl Orange in Aqueous Solutions

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