Removal of Hg2+ heavy metal ion using a highly stable mesoporous porphyrinic zirconium metal-organic framework

Hasankola, Zahra Seyfi; Rahimi, Rahmatollah; Shayegan, Hossein; Moradi, Ehsan; Safarifard, Vahid

doi:10.1016/j.ica.2019.119264

Cited by 55 publications

(25 citation statements)

References 39 publications

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“…Therefore, the calculated value of pseudo-second-order equilibrium adsorption is higher than that of the pseudo-first-order model for lead ions. In addition, the R 2 for the pseudo-second-order kinetic model demonstrates that the adsorption method is initiated by chemical reactions between the water pollutant Pb (II) ions and the active adsorbent sites [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

“…The morphology of surfaces was studied using a JEOL 630 -FSEM (Tokyo, Japan). The synthesized materials were controlled using a Nicolet 100 FTIR (Chicago, IL, USA) in the range of 4000–400 cm −1 by the KBr pellet method [ 33 ]. The inductively-coupled plasma optical emission spectrometry (ICP-OES) on a Varian Vista-PRO apparatus (Pau, France), equipped with a charge-coupled detector, was used to determine the concentration of heavy metal ions.…”

Section: Methodsmentioning

confidence: 99%

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Adsorption of Lead Ions by a Green AC/HKUST-1 Nanocomposite

2020

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A new nanocomposite consisting of activated carbon (AC) from the Cortaderia selloana flower and copper-based metal-organic framework (HKUST-1) was synthesized through a single-step solvothermal method and applied for the removal of lead ions from aqueous solution through adsorption. The nanocomposite, AC/HKUST-1, was characterized by Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and Energy-Dispersive X-ray Spectroscopy (EDX) methods. The SEM images of both HKUST-1 and AC/HKUST-1 contain octahedral crystals. Different factors affecting adsorption processes, such as solution pH, contact time, adsorbent dose, and initial metal pollution concentration, were studied. The adsorption isotherm was evaluated with Freundlich and Langmuir models, and the latter was fitted with the experimental data on adsorption of lead ion. The adsorption capacity was 249.4 mg g−1 for 15 min at pH 6.1, which is an excellent result rivalling previously reported lead adsorbents considering the conditions. These nanocomposites show considerable potential for use as a functional material in the ink formulation of lead sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Adsorption of Lead Ions by a Green AC/HKUST-1 Nanocomposite

2020

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“…[10] To date, several approaches were applied to remove the HMIs from water including nanofiltration, membrane separation, ion exchange, [11,12] resin, [13] photocatalytic degradation, [14] chemical moisture, membrane filtration, freezing, chemical deposition, biological treatment, reverse osmosis, adsorption, etc. [15][16][17][18][19][20] Adsorption is one of the best treatment methods because it does not require high temperatures, as well as several substances, that can be captured at the same time. [21][22][23] Absorbers are generally divided into two groups: mineral porous materials including activated carbon (AC), clay minerals, chemicals, chitosans, and two-layer hydroxides, etc.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

2020

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The efficient adsorption of heavy metal ions from wastewater has become a serious challenge from both environmental and biological viewpoints. Recently, porous metal‐organic frameworks (MOFs), with metallic clusters and organic linkers, have been developed as promising structures in the capture of different toxic and hazardous substances, including heavy metal ions, because of their unique features. Here there is a collection for recent progress in the field of water remediation from the variable‐valent metals in polluted water and the corresponding MOFs which are able to remove these pollutant agents from water. Meanwhile, effective factors in the absorption of metal ions are discussed. MOFs are considered to be a promising candidate for metal ions removal from wastewater.

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“…[11][12][13][14] In addition, owing to the large surface area, many nanosized materials and metal-organic framework materials have been employed as novel adsorbents to remove Hg (II). [10,[15][16][17][18] However, in most case, these adsorbents not only suffer from limited adsorption capacities but also are uneconomical and difficult to degrade. For example, Rabiul Awual et al found the maximum Hg (II) adsorption capacity for the conjugate nanomaterials containing organic ligand can only reach 164.22 mg g −1 .…”

Section: Introductionmentioning

confidence: 99%

“…[16] The PCN-211, a kind of zirconium-based metal-organic framework, had the higher adsorption capacity of 233 mg g −1 for Hg (II), but the expensive raw materials and complex synthesis process restrict its application. [17] Consequently, the hunt for low-cost, widely available, and recyclable adsorbents with excellent adsorption capacities has motivated researchers to perform many studies on some natural materials, especially the environmentally friendly natural polysaccharides and their functionalized derivatives. [19][20][21][22] Starch is an abundant, biodegradable, and renewable natural polymer.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of a Starch‐Based Adsorbent for the Effective Removal of Environmental Pollutants Hg (II)

Riley

Liu

et al. 2020

Starch Stärke

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In this work, a dialdehyde starch cysteine (DASC) Schiff base is synthesized by the reaction of dialdehyde starch (DAS) and l-cysteine, and subsequently tested to remove Hg (II) from aqueous solution using the batch method. It is also characterized by elemental analysis, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscope (SEM), Brunner-Emmet-Teller (BET) measurements, and X-ray photoelectron spectroscopy (XPS) techniques. The results reveal that the DASC is a kind of starch-based Schiff base containing thiol group, which holds excellent adsorption capacity for Hg (II) due to the interaction between sulfur atoms and Hg (II). At 25°C, the equilibrium can be achieved within 2 h and the maximal adsorption capacity of DASC with the substitution degree of 1.14 can be reached at 884.6 mg g −1 at initial pH 5. A relatively high temperature is favorable for the adsorption process of Hg (II). The kinetic and isotherm data are well fitted with the linear forms of pseudo-second order equation and Freundlich model. Additionally, the DASC shows good regenerative adsorption efficiency of 87.07% after four recycles. Owing to the advantages of economical, eco-friendly, high adsorption capacity, and recyclability, DASC may provide valuable information for the treatment of Hg (II) contaminated water.

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Removal of Hg2+ heavy metal ion using a highly stable mesoporous porphyrinic zirconium metal-organic framework

Cited by 55 publications

References 39 publications

Adsorption of Lead Ions by a Green AC/HKUST-1 Nanocomposite

Adsorption of Lead Ions by a Green AC/HKUST-1 Nanocomposite

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

Preparation and Characterization of a Starch‐Based Adsorbent for the Effective Removal of Environmental Pollutants Hg (II)

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