Ion exchange based approach for rapid and selective Pb(II) removal using iron oxide decorated metal organic framework hybrid

Goyal, Prateek; Tiwary, Chandra S.; Misra, Superb K.

doi:10.1016/j.jenvman.2020.111469

Cited by 82 publications

(19 citation statements)

References 32 publications

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“…Beyond pH 1.2, however, the trend followed that of a previous study in which the maximum adsorption efficiency of Pb 2+ ions was found at low pH, and the value decreased as the pH increased. The decreasing adsoption efficiency at increasing pH showed that the adsorption mechanism most likely occurred via chemical interaction or substitution process instead of electrostatic forces (Goyal et al, 2021). The optimum adsorption of Pb 2+ in MIL-100(Fe), as reported previously by Forghani et al (2020), was ~65% at a pH 5.5.…”

Section: Stability Test Of Materials In the Intestinal And Stomach Simulation Medium And Watersupporting

confidence: 65%

“…The adsorption capacity increased significantly with increasing concentrations of Pb 2+ , as indicated by the large number of ions adsorbed per area of adsorbent. Furthermore, the large number of ions is also the driving force for the transfer of Pb 2+ ions from the solution to the adsorbent (Goyal et al, 2021). By contrast, the adsorption efficiency decreased as the concentration of Pb 2+ increased due to the competition among the overcrowded Pb 2+ ions.…”

Section: Effect Of Contact Timementioning

confidence: 99%

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In Situ Green Synthesis of Mil-100(Fe) Modified Edta as an Enhanced Candidate Detoxifying Agent of Lead Heavy Metal (Pb) and Its Adsorption Characteristics

Lestari

Meilani

Nurcahyo

et al. 2021

Preprint

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EDTA-modified MIL-100(Fe) (MIL = Matériaux de l′Institut Lavoisier) was successfully prepared in situ using an electrochemical method. The porous nature of the material and its high stability under intestinal and stomach conditions present it as a great candidate agent for lead detoxification. Kinetic and isotherm investigations revealed that the adsorption of Pb2+ ions in MIL-100(Fe)-EDTA followed a pseudo-second order kinetic model with a rate constant of 0.0109 g/mg.min and a Langmuir isotherm model with an adsorption energy of 31.29 kJ/mol. The synthesized MIL-100-EDTA showed three times enhanced performance than MIL-100(Fe) in Pb2+ adsorption study. Optimum adsorption was achieved at pH 3 at an initial concentration of 5 ppm and a contact time of 12 h, yielding adsorption efficiency and capacity of up to 86.65% and 3.68 mg/g, respectively.

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Section: Stability Test Of Materials In the Intestinal And Stomach Simulation Medium And Watersupporting

confidence: 65%

Section: Effect Of Contact Timementioning

confidence: 99%

In Situ Green Synthesis of Mil-100(Fe) Modified Edta as an Enhanced Candidate Detoxifying Agent of Lead Heavy Metal (Pb) and Its Adsorption Characteristics

Lestari

Meilani

Nurcahyo

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…These advantages allow us to design ideal materials for different purposes through different experimental methods. MOFs are also used in a wide variety of applications including gas separation [5,6], sensing [7], gas adsorption [8,9], selective catalysis [10,11], ion exchange [12], ultra-high purity separation [13], protein hydrolysis [14], as well as in biological conductive materials, photoelectric materials, new semiconductor materials, magnetic materials and in the field of chip development [15][16][17][18][19]. With this vast array of possibilities, high expectations have been laid on MOFs and its composite materials.…”

Section: Introductionmentioning

confidence: 99%

Carbon Dioxide Enrichment PEBAX/MOF Composite Membrane for CO2 Separation

Tang

et al. 2021

Membranes

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Zeolitic imidazole framework (ZIF-8) was incorporated into poly(ether-block-amide) (Pebax-1657) in differing ratios to prepare mixed matrix membranes (MMMs) for gas separation. As ZIF-8 loading is increased, gas separation selectivity also gradually increases. For economic considerations, the proportion of the increase in selectivity to the amount of MOF loaded per unit was calculated. The results show that mixing 5% MOF gives the best unit performance. With this, a variety of MOFs (UiO-66, UiO-66-NH2, A520, MIL-68(Al) and MIL-100(Fe)) were mixed with PEBAX at 5 loading to prepare MMMs. In this work, metal-organic frameworks (MOFs) were processed using the dry-free method, where in the synthesized MOF was not dried prior to incorporation. The gas separation performance test carried out shows the highest separation performance was exhibited by P-UiO-66, wherein the CO2/N2 gas selectivity was 85.94, and the permeability was 189.77 (Barrer), which was higher than Robeson’s Upper bound in 2008, and obtained a high permeability and selectivity among mixed matrix membranes. In the preparation of high quality MMMs for gas separation, details regarding the interface phenomenon were assessed.

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“…[9][10][11] Therefore, removing these heavy metal ions is an important part of solving water pollution. People have developed various strategies to remove heavy metal ions from polluted water such as chemical precipitation method, [12] ion exchange, [13][14][15][16] flocculation, [17] filtration, [18][19][20] and membrane separation. [21,22] However, especially in the case of trace concentrations, these strategies are limited by high costs and even inefficient in removing certain heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Macroporous High Adsorbent Resin and Its Application for Heavy Metal Ion Removal

Shi

et al. 2021

ChemistrySelect

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Macroporous high adsorbent resins (MHAR) are important and urgent requirements for qualified adsorbents to remove toxic heavy metals in wastewater since the short adsorption time and large adsorption capacity. Herein, a new type of MHAR was prepared by graft copolymerization of acrylic acid with sodium carboxymethyl cellulose (CMC) and sodium alginate (SA) by using N, N'-methylenebisacrylamide (MBA) as crosslinking agent, hydrogen peroxide (H 2 O 2 ) and ascorbic acid as initiator. We characterized the morphology of the MHAR and explored the optimal conditions for MHAR to absorb water. The results showed that pH and temperature had great influences on the amount of heavy metals adsorption. The adsorption process is a linear model of multiphase multilayer molecular adsorption reaction, which belongs to the second-level kinetic model. The adsorption thermodynamic experiment showed that the adsorption of Cu 2 + by MHAR conforms to the Freundlich adsorption isotherm. This work succeeded in preparing a MHAR that may have potential applications in environmental governance.

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Ion exchange based approach for rapid and selective Pb(II) removal using iron oxide decorated metal organic framework hybrid

Cited by 82 publications

References 32 publications

In Situ Green Synthesis of Mil-100(Fe) Modified Edta as an Enhanced Candidate Detoxifying Agent of Lead Heavy Metal (Pb) and Its Adsorption Characteristics

In Situ Green Synthesis of Mil-100(Fe) Modified Edta as an Enhanced Candidate Detoxifying Agent of Lead Heavy Metal (Pb) and Its Adsorption Characteristics

Carbon Dioxide Enrichment PEBAX/MOF Composite Membrane for CO2 Separation

Preparation of Macroporous High Adsorbent Resin and Its Application for Heavy Metal Ion Removal

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