Removal of cobalt and lead ions from wastewater samples using an insoluble nanosponge biopolymer composite: adsorption isotherm, kinetic, thermodynamic, and regeneration studies

Taka, Anny Leudjo; Fosso‐Kankeu, Elvis; Pillay, Kriveshini; Mbianda, Xavier Yangkou

doi:10.1007/s11356-018-2055-6

Cited by 79 publications

(31 citation statements)

References 34 publications

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“…On the other hand, Dubinin‐Radushkevich (D‐R) model is mainly applied to describe the mechanism of adsorption on a uniform surface while considering the activation energy. D‐R model allows to assess the extent in which the adsorption capacity is distributed by individual pore ranges . Temkin isotherm is a model expressing the interaction between solute molecule from aqueous phase and uniform solid surface.…”

Section: Resultsmentioning

confidence: 99%

“…D-R model allows to assess the extent in which the adsorption capacity is distributed by individual pore ranges. [43] Temkin isotherm is a model expressing the interaction between solute molecule from aqueous phase and uniform solid surface. This useful tool clarifies that the adsorption heat of all molecules in the absorbed layer with the coated surface reduces linearly based on the absorption interaction.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

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Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Sharifpour

Dil

Asfaram

et al. 2019

Applied Organom Chemis

104

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In the present work, Mn‐doped CuO‐NPs‐AC was prepared by a simple method, characterized using various techniques such as FESEM, EDX, XRD, PSD, and pHpzc and finally used for the adsorption of malachite green (MG) and methyl orange (MO) in a number of single and binary solutions. A series of adsorption experiments were conducted to investigate and optimize the influence of various factors (such as different pH, concentration of MG and MO, adsorbent mass, and sonication time) on the simultaneous adsorption of MG and MO using response surface methodology. Under optimal conditions of pH 10, adsorbent dose of 0.02 g, MG concentration of 30 mg L−1, MO concentration of 30 mg L−1, and sonication time of 4.5 min at room temperature, the maximum predicted adsorption was observed to be 100.0%, for both MG and MO, showing that there is a favorable harmony between the experimental data and model predictions. The adsorption isotherm of MO and MG by Mn‐doped CuO‐NPs‐AC could be well clarified by the Langmuir model with maximum adsorption capacity of 320.69 mg g−1 and 290.11 mg g−1 in the single solution and 233.02 mg g−1 and 205.53 mg g−1 in the binary solution by 0.005 g of adsorbent mass for MG and MO, respectively. Kinetic studies also revealed that both MG and MO adsorption were better defined by the pseudo‐second order model for both solutions. In addition, the thermodynamic constant studies disclosed that the adsorption of MG and MO was likely to be influenced by a physisorption mechanism. Eventually, the reusability of the Mn‐doped CuO‐NPs‐AC after six times showed a reduction in the adsorption percentage of MG and MO.

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Section: Resultsmentioning

confidence: 99%

Section: Adsorption Isothermsmentioning

confidence: 99%

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Sharifpour

Dil

Asfaram

et al. 2019

Applied Organom Chemis

104

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“…Their values are also listed in Table 3. [39] 3.2.8 | Sorption and desorption of magnetic MOF Fe 3 O 4 -NHSO 3 H@HKUST-1 The positive value of ΔH and ΔS for the adsorption of Pb(II) ions represent endothermic and increase of irregularities in the adsorption phenomenon, respectively.…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

“…In this case, because of the coordination mechanism of lead adsorption on the Fe 3 O 4 -NHSO 3 H@HKUST-1 nanocomposite, the combined effects on adsorption of lead ion depend on the solution pH, concentration of coexisting ions, ion-ligand interaction, and ion-ion competition at the active sites of adsorption. [39]…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

Highly efficient removal of toxic lead ions from aqueous solutions using a new magnetic metal‐organic framework nanocomposite

Karimi

Masrouri

Karami

et al. 2019

J Chinese Chemical Soc

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A magnetic metal‐organic framework (MOF) nanocomposite was successfully prepared by a new and green strategy through reasonable design. Magnetic MOF of Fe3O4‐NHSO3H@HKUST‐1 nanocomposite use for removal of lead ions as an environmental pollutant. The experimental results indicated that the nano adsorbent of Fe3O4‐NHSO3H@HKUST‐1 can removed lead ions under optimum operational conditions. The dosage of the nanocomposite, pH of the sample solution, and contact time were obtained to be 10 mg, 7.0, and 90 min, respectively, while the initial concentration of Pb(II) ions of 400 mg/L was used. A kinetic study indicated that a pseudo‐second‐order model agreed well with the experimental data. The isotherm experiments revealed that the Langmuir model attained better fits to the equilibrium data than the Freundlich model. The maximum adsorption capacity of the adsorbent for the removal of lead under the optimum operational conditions of pH 7.0 and temperature 25°C was found to be 384.6 mg/g. The thermodynamic parameters indicate that the adsorption of lead is spontaneous and endothermic. The magnetic MOF nanocomposite could be recovered easily and reused many times without significant loss of its nano‐adsorbent activity. The proposed method is simple, eco‐friendly, low cost, and efficient in the removal of lead ions from aqueous solutions.

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“…Based on its long-term impact, Cr(VI) has been listed as the first-class A toxic pollutant by the U.S. Environmental Protection Agency [3]. While Pb(II) acts as one of the most harmful heavy metals [4], plumbism by accumulation in human body can result in damages in brain, nervous, metabolic and reproductive system, even trigger sickness or death [5,6]. The bulk of these contaminations as effluents are discharged from several industries, including mining, batteries, textiles, metal plating, etc.…”

Section: Introductionmentioning

confidence: 99%

Different Insights into Silicate Rectorite Modification and Its Role in Removal of Heavy Metal Ions from Wastewater

Gao¹,

Jiang²,

Li³

et al. 2020

Minerals

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In the field of water management, the separation of metal contaminants from wastewater is very important and challenging. This study systematically investigated the effect and underlying mechanism of silicate rectorite (REC) on the removal of heavy metal ions (Cr(VI) and Pb(II)) from wastewater. The adsorption and removal capacity of REC was further improved by its novel modification with ferric chloride hexahydrate. Compared to natural REC, the modified rectorite (Fe-REC) showed comparatively superior adsorption efficiency for both Cr(VI) and Pb(II) due to the chemisorption of Fe 3+ on the REC surface as its oxidation state (Fe-O, Fe-OH, Fe-OOH). Adsorption on Cr(VI) attributed to the reaction between iron hydroxy complexes (FeOH 2+ , Fe(OH) 2 + and Fe(OH) 3 (aq)) and Cr(VI) species (HCrO 4 − and CrO 4 2− ) in the aqueous solution. This reaction was perfectly consistent with the binding energy shifts in O 1s and Fe 2p species, as reflected by XPS analysis. While, the existence of -Al-OH and -Si-OH in silicate REC slurry reacted with PbOH + colloids produced from lead ions hydrolysis to promote Pb(II) adsorption. Zeta potential after modification and removal occurred to shift positively or negatively to testify the adsorption of Fe 3+ and heavy metal ions. Freundlich and Langmuir isotherms conformed adsorption process for Cr(VI) and Pb(II), respectively.Minerals 2020, 10, 176 2 of 16 and economical approach that is widely used in wastewater treatment procedures. In adsorption, a variety of adsorbent including activated carbons, clay mineral, biomasses and synthetic polymers was employed [8,[10][11][12][13]. However, common adsorbents such as activated carbon are expensive, thus some natural resources such as polysaccharides, fly ash and clay have attracted much attention due to their low cost and easy access. In this series of materials, rectorite (REC) was applied more and more in pollutant adsorption from sewage owing to its low cost, high ion exchange capacity and relatively large specific area [14][15][16][17]. It is a sort of rare regularly interstratified silicate and similar to kaolinite. Its special structure is alternate pairs of dioctahedral mica-like layer (non-expansible) and dioctahedral smectite-like layer (expansible) existing in 1:1 ratio. There are some cations (Na + , K + and Ca 2+ ) and hydrated cations with exchangeability, which can enlarge its interlayer distance by intercalating cations or polar molecules existing in the interlayer regions.Over several decades, there are more and more investigations on the adsorption of metal ions by REC or its synthesis [17][18][19][20][21]. For example, Mei et al. [17] and Zhao et al. [22] studied separately the adsorption behaviors of Pb(II) by Ca-rectorite and Sr(II) by Na-rectorite as a function of different environmental parameters including the influence of pH, temperature, ionic strength and humic acid (HA) under ambient conditions. Both of them found that the adsorption results of heavy metals were intensely decided by pH and ionic strength and the...

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Removal of cobalt and lead ions from wastewater samples using an insoluble nanosponge biopolymer composite: adsorption isotherm, kinetic, thermodynamic, and regeneration studies

Cited by 79 publications

References 34 publications

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Highly efficient removal of toxic lead ions from aqueous solutions using a new magnetic metal‐organic framework nanocomposite

Different Insights into Silicate Rectorite Modification and Its Role in Removal of Heavy Metal Ions from Wastewater

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