Removal of copper ions from aqueous solution by adlai shell (Coix lacryma-jobi L.) adsorbents

Luna, Mark Daniel G. de; Flores, Edgar Dulay; Cenia, Marie Chela B.; Lu, Ming‐Chun

doi:10.1016/j.biortech.2015.06.018

Cited by 31 publications

(19 citation statements)

References 16 publications

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“…Adsorption, however, remains a feasible alternative, especially in developing countries, because it is environmentally benign, simple, inexpensive, and does not produce large sludge quantities [15]. In recent decades, various natural and synthetic adsorbents have been examined for their ability to remove heavy metals from contaminated solutions [16][17][18][19], yet separating these adsorbents from the water matrix entails a complex process and additional cost.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Isotherm and Kinetic Modeling of Cu(II) and Pb(II) Uptake from Water by MnFe2O4/Chitosan Nanoadsorbents

Taguba

Ong

Ensano

et al. 2021

Water

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Researchers are in continuous search of better strategies to minimize, if not prevent, the anthropogenic release of toxic heavy metals, such as Cu(II) and Pb(II), into drinking water resources and the natural environment. Herein, we report for the first time the low-temperature combustion synthesis of magnetic chitosan-manganese ferrite in the absence of toxic cross-linking agents and its removal of Cu(II) and Pb(II) from single-component metal solutions. The nonlinear Langmuir model best described the isotherm data, while the nonlinear pseudo-second order model best described the kinetic data, signifying monolayer Cu(II) or Pb(II) adsorption and chemisorption as the rate-determining step, respectively. Adsorption capacities by magnetic chitosan-manganese ferrite obtained for both metals were consistently higher than those by manganese ferrite, indicating that chitosan enhanced the performance of the magnetic adsorbent. The maximum adsorption capacities of magnetic chitosan-manganese ferrite for Cu(II) and Pb(II) were 14.86 and 15.36 mg g−1, while that of manganese ferrite were 2.59 and 13.52 mg g−1, respectively. Moreover, the adsorbents showed superior binding affinity and sorption for Pb(II) than Cu(II) owing to the stronger ability of the former to form inner-sphere complexes with manganese ferrite and magnetic chitosan-manganese ferrite. Finally, thermodynamic studies revealed that the uptake of either Pb(II) or Cu(II) by magnetic chitosan-manganese ferrite was spontaneous and endothermic. The as-prepared adsorbent was characterized for morphology, elemental composition, surface functional sites, and particle size using scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, and dynamic light scattering technique, respectively.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Isotherm and Kinetic Modeling of Cu(II) and Pb(II) Uptake from Water by MnFe2O4/Chitosan Nanoadsorbents

Taguba

Ong

Ensano

et al. 2021

Water

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“…This occurs in many industries including mining process, smelting, metal plating, pigment, battery manufacturing processes, metallurgical industries [1] [2] [3], tannery and fabrication [4].…”

Section: Introductionmentioning

confidence: 99%

Sesame Husk as Adsorbent for Copper(II) Ions Removal from Aqueous Solution

El-Araby¹,

Ibrahim²,

Mangood³

et al. 2017

GEP

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In this study, the adsorption behavior of copper(II) ions from aqueous solutions onto sesame husk (SH) was investigated. The effect of different parameters such as pH, contact time, adsorbent dosage, adsorbate concentration, temperature and agitation speed was studied. Thermodynamic parameters, equilibrium isotherms and kinetic data have been evaluated. The functional groups and surface morphology of SH adsorbent were characterized by FTIR and SEM. Adsorption equilibrium isotherms were expressed by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) adsorption models and it was found that Langmuir adsorption model fits the experimental data better than Freundlich and D-R models. The adsorption can be best described by the pseudo second-order kinetic model.

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“…This is because the microbial biomass often requires immobilization to enhance its stability and mechanical strength, which increases the complexity of the operation 10 . Although several waste biomaterials show good adsorption efficacy, they require extremely high process temperature levels, which results in extra energy consumption 11 12 . Thus, different types of biomasses as alternative biosorbents have been proposed to remove heavy metals.…”

mentioning

confidence: 99%

Biosorption of Pb (II) from aqueous solution by extracellular polymeric substances extracted from Klebsiella sp. J1: Adsorption behavior and mechanism assessment

Wei

Wang

et al. 2016

Sci Rep

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The adsorption performance and mechanism of extracellular polymeric substances (EPS) extracted from Klebsiella sp. J1 for soluble Pb (II) were investigated. The maximum biosorption capacity of EPS for Pb (II) was found to be 99.5 mg g−1 at pH 6.0 and EPS concentration of 0.2 g/L. The data for adsorption process satisfactorily fitted to both Langmuir isotherm and pseudo-second order kinetic model. The mean free energy E and activation energy Ea were determined at 8.22– 8.98 kJ mol−1 and 42.46 kJ mol−1, respectively. The liquid-film diffusion step might be the rate-limiting step. The thermodynamic parameters (ΔGo, ΔHo and ΔSo) revealed that the adsorption process was spontaneous and exothermic under natural conditions. The interactions between EPS system and Pb (II) ions were investigated by qualitative analysis methods (i.e Zeta potential, FT-IR and EDAX). Based on the strong experimental evidence from the mass balance of the related elements participating in the sorption process, an ion exchange process was identified quantitatively as the major mechanism responsible for Pb (II) adsorption by EPS. Molar equivalents of both K+ and Mg2+ could be exchanged with Pb2+ molar equivalents in the process and the contribution rate of ion exchange to adsorption accounted for 85.72% (Δmequiv = −0.000541).

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Removal of copper ions from aqueous solution by adlai shell (Coix lacryma-jobi L.) adsorbents

Cited by 31 publications

References 16 publications

Nonlinear Isotherm and Kinetic Modeling of Cu(II) and Pb(II) Uptake from Water by MnFe2O4/Chitosan Nanoadsorbents

Nonlinear Isotherm and Kinetic Modeling of Cu(II) and Pb(II) Uptake from Water by MnFe2O4/Chitosan Nanoadsorbents

Sesame Husk as Adsorbent for Copper(II) Ions Removal from Aqueous Solution

Biosorption of Pb (II) from aqueous solution by extracellular polymeric substances extracted from Klebsiella sp. J1: Adsorption behavior and mechanism assessment

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