Remediation of metal contaminated soil by aluminium pillared bentonite: Synthesis, characterisation, equilibrium study and plant growth experiment

Kumararaja, P.; Manjaiah, K.M.; Datta, S. C.; Sarkar, Binoy

doi:10.1016/j.clay.2016.12.017

Cited by 78 publications

(33 citation statements)

References 51 publications

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“…However, this is inconsistent with Kumararaja's investigation. They reported that Cu(II), Zn(II), and Ni(II) adsorption on pillared bentonite follows the Langmuir and Freundlich isotherm models . Therefore, it can be deduced that adsorption of metal ions on unmodified bentonite and modified bentonite follows different mechanisms.…”

Section: Resultsmentioning

confidence: 99%

“…Adsorption is an economical and effective technique to remove heavy metals and organic pollutants . Recently, many low‐cost adsorbents such as clay materials, hematite, and agricultural waste have been investigated for heavy metals removal to further reduce the operation costs. Among these adsorbents, clay adsorbents have received more attention .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Binary adsorption of Cu(II) and Ni(II) on Lai'yang bentonite: Kinetics, equilibrium, competition quantitative and mechanisms investigation

Xiao

Cao

Lyu

et al. 2019

Env Prog and Sustain Energy

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In this study, the competitive adsorption of Cu(II) and Ni(II) adsorption onto bentonite were investigated. The effects of initial adsorbate concentration, pH, contact time, temperature on adsorption and the kinetics, thermodynamic, quantification of adsorption competition and competitive mechanisms have been studied. The results indicated that Cu(II) has a higher affinity than Ni(II) for adsorption on bentonite. But the inhibition effect was not noticeable under alkaline conditions. The Langmuir and pseudo-second-order kinetics models can be applied to simulate the isothermal adsorption and adsorption dynamic, respectively. Under a single system/binary system, the maximum adsorption capacity of bentonite for Cu(II) and Ni(II) is 12.76/10.57 and 11.12/9.11 mg/g, respectively. The equilibrium adsorption capacity reduction rate is suitable for quantitative characterization of adsorption competition under any concentration conditions; adsorption competition coefficient is more suitable for low concentration adsorption; although the distribution coefficient is not suitable for quantitative adsorption competition at high concentrations, it can be used to characterize the variation of adsorption competitiveness of Cu(II) at different concentrations. The higher electronegativity, lower first hydrolysis constant and Misono softness, and a better "guest-host" consistency between Cu(II)O 6 and the vacancies in the montmorillonite octahedral sheet make the higher affinity of Cu(II) to bentonite and result in the possible ion exchange between Cu(II) in solution and adsorbed Ni(II). In addition, at high concentrations, Cu(II) and Ni(II) precipitates formed on the surface of montmorillonite may cause remained Cu(II) ions in the solution unable to enter the internal space of the montmorillonite octahedron. K E Y W O R D S nickel, copper, bentonite, quantification of adsorption competition, mechanisms

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Binary adsorption of Cu(II) and Ni(II) on Lai'yang bentonite: Kinetics, equilibrium, competition quantitative and mechanisms investigation

Xiao

Cao

Lyu

et al. 2019

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Kumararaja et al [104] used the aluminum-pillared bentonite to enhance the efficiency of metal immobilization, and the pillared bentonite at a 2.5% application rate demonstrated the best immobilization effectiveness to the heavy metals (Cu, Zn, and Ni), significantly reducing their bioavailability. Yang et al [105] studied the characteristics of organ-montmorillonite modified by tetramethylammonium (T-Monts) and hexadecyltrimethylammonium (H-Monts).…”

Section: Bentonitementioning

confidence: 99%

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Zhang

Wang

2017

Sustainability

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Abstract:The safe disposal of sewage sludge during the process of municipal wastewater treatment has become one of the major concerns of increased production. Land application was thought of as a more economical method for sewage sludge disposal than landfill and incineration. However, the presence of heavy metals in sewage sludge restricted the use of land application. The environmental risk of heavy metals was dependent on their contents, chemical speciations, and soil characteristics. Composting and chemical immobilization were the commonly used methods to immobilize the heavy metals in sewage sludge. The immobilization mechanism and speciation transformation of heavy metals during the composting process were presented. Aluminosilicate, phosphorus-bearing materials, basic compounds, and sulfides were reviewed as the commonly used chemical immobilizing agents. The problems that occur during the immobilization process were also discussed. The combination of different methods and the modification of chemical immobilizing agents both improved the fixation effect on heavy metals.

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“…So far, most researcher have focused on adsorbing ions of heavy metals from aqueous solutions, while direct adsorption and immobilizing these elements in soil have remained understudied . Nevertheless, a few researches have been reported for immobilization of metal ions in soil using polymer based nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization, and Application of Polyacrylamide‐Polystyrene/Bentonite Nanocomposite as an Effective Immobilizing Adsorbent for Remediation of Soil

et al. 2020

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Heavy metals are among the most important environmental pollutants. However, little attention has been devoted to immobilizing or fixing metal ions in soil for remediation of soil. Here, a novel and inexpensive, polymer nanocomposite (polyacrylamide-polystyrene/bentonite) is introduced for successful immobilization of cadmium (Cd) and lead (Pb) cations in the soil. The synthesized nanocomposite structure was characterized by X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy/Energy-Dispersive X-Ray Spectroscopy (FE-SEM/EDX), Transmission Electron Microscopy (TEM), Brunauer-Emmett-Teller (BET), and Fourier-Transform Infrared Spectroscopy (FT-IR). Various effective parameters such as pH, bentonite: polyacrylamide weight ratio, heavy metal concen-tration, and amount of adsorbent were investigated for fixing Pb and Cd cations in farm soil. Also, adsorption isotherms and kinetics of adsorption were investigated. Finally, under optimum conditions, the extent of adsorption of Pb and Cd cations by polyacrylamide-polystyrene/bentonite nanocomposite, polyacrylamide, and bentonite was compared. The results revealed the superior adsorption activity of the nanocomposite for immobilizing heavy metal cations as compared to bentonite or polymer. Further, the nanocomposite indicated a reasonable reusability for fixing Cd and Pb cations. Overall, the prepared nanocomposite can be applied as a suitable and industrial adsorbent for immobilizing Pb and Cd cations in soil.

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Remediation of metal contaminated soil by aluminium pillared bentonite: Synthesis, characterisation, equilibrium study and plant growth experiment

Cited by 78 publications

References 51 publications

Binary adsorption of Cu(II) and Ni(II) on Lai'yang bentonite: Kinetics, equilibrium, competition quantitative and mechanisms investigation

Binary adsorption of Cu(II) and Ni(II) on Lai'yang bentonite: Kinetics, equilibrium, competition quantitative and mechanisms investigation

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Preparation, Characterization, and Application of Polyacrylamide‐Polystyrene/Bentonite Nanocomposite as an Effective Immobilizing Adsorbent for Remediation of Soil

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