Novel hyperbranched polyurethane resins for the removal of heavy metal ions from aqueous solution

Kalaivani, S.; Muthukrishnaraj, A.; Sivanesan, S.; Ravikumar, L.

doi:10.1016/j.psep.2016.08.010

Cited by 46 publications

(16 citation statements)

References 42 publications

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“…Polymeric materials have been extensively studied for their application in toxic metals removals, such as alginate-based composite [10], β-cyclodextrin nano-sponge [11], and cellulose membrane [12]. Other than those polymers, polyurethane (PU) has gained many interests in academic research for its adsorption ability to remove multiple heavy metal ions [13,14]. The interest in PU adsorbent is because the material can be easily manufactured and shaped [15].…”

Section: Introductionmentioning

confidence: 99%

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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The use of polymeric material in heavy metal removal from wastewater is trending. Heavy metal removal from wastewater of the industrial process is of utmost importance in green/sustainable manufacturing. Production of absorbent materials from a natural source for industrial wastewater has been on the increase. In this research, polyurethane foam (PUF), an adsorbent used by industries to adsorb heavy metal from wastewater, was prepared from a renewable source. Castor oil-based polyurethane foam (COPUF) was produced and modified for improved adsorption performance using fillers, analyzed with laser-induced breakdown spectroscopy (LIBS). The fillers (zeolite, bentonite, and activated carbon) were added to the COPUF matrix allowing the modification on its surface morphology and charge. The materials were characterized using Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), and thermal gravimetry analysis (TGA), while their adsorption performance was studied by comparing the LIBS spectra. The bentonite-modified COPUF (B/COPUF) gave the highest value of the normalized Pb I (405.7 nm) line intensity (2.3), followed by zeolite-modified COPUF (Z/COPUF) (1.9), and activated carbon-modified COPUF (AC/COPUF) (0.2), which indicates the adsorption performance of Pb2+ on the respective materials. The heavy metal ions’ adsorption on the B/COPUF dominantly resulted from the electrostatic attraction. This study demonstrated the potential use of B/COPUF in adsorption and LIBS quantitative analysis of aqueous heavy metal ions.

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Section: Introductionmentioning

confidence: 99%

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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“…With a lower concentration, the metal ions are almost adsorbed efficiently to the surface of composite PU foam. Conversely, with a high concentration, the surface of active adsorbent saturates efficiently, which hampers the metal ions from interacting with the binding sites of the adsorbent 42 . As in Figure 8(A), when the Pb 2+ concentration is higher, composite PU foam demonstrates a greater adsorption capacity, which is ascribed to a greater contact probability between composite PU foam and metal ions.…”

Section: Resultsmentioning

confidence: 97%

Study on melamine/bentonite polyurethane porous composite foam: Pb²⁺ adsorption and mechanical properties

Zhang

Wang

et al. 2021

Polymers for Advanced Techs

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In this paper, by adding melamine and bentonite to the polyurethane (PU) foam, a porous composite material with heavy metal adsorption properties is obtained. The cell size of the PU porous composite foam was affected by the addition of melamine and bentonite particles. With the increase of particles amount, the cell size decreased. The compression performance of the composite foam increased by 54% after adding 8 wt% melamine particles. The optimal adsorption conditions such as pH, adsorption time, and initial concentration of PU porous composites were also explored. Result shows that porous composite foam had a good removal effect on Pb2+. Moreover, the Langmuir model, the Freundlich model, and the adsorption kinetic model are used to evaluate the adsorption capacity of the porous composite foam. It is of great significance to obtain porous composite with good heavy‐metal adsorption and high‐strength performance.

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“…According to theory, the pseudo-first-order kinetic model is mainly based on the physical adsorption used in the liquid phase adsorption environment, and the pseudo-second-order model is mainly based on the chemical adsorption, including the electronic sharing and electron transfer [53]. The slopes and intercepts of curves by fitting (Figure 10) are used to determine k (the constant), q e (capacity) and R (the corresponding linear regression correlation coefficient) (Table 2).…”

Section: Resultsmentioning

confidence: 99%

Preparation of PVDF/Hyperbranched-Nano-Palygorskite Composite Membrane for Efficient Removal of Heavy Metal Ions

et al. 2019

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In this work, three kinds of hyperbranched polyamidoamine-palygorskite (PAMAM-Pal) were designed and synthesized by grafting the first generation polyamidoamine (G1.0 PAMAM), G2.0 PAMAM and G3.0 PAMAM onto Pal surfaces, respectively. Then, these PAMAM-Pals were used as additives to prepare polyvinylidene fluoride (PVDF)/hyperbranched polyamidoamine-palygorskite bicomponent composite membranes. The structures of the composite membranes were characterized by Fourier transform infrared spectroscopy (FTIR), thermo gravimetric analysis (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electronmicroscopy (SEM), atomic force microscope (AFM) and Thermogravimetric analysis (TGA). The adsorption properties of composite membranes to heavy metal ions was studied, and the results found that the maximum adsorption capacities for Cu(II), Ni(II) and Cd(II) could reach 155.19 mg/g, 124.28 mg/g and 125.55 mg/g, respectively, for the PVDF/G3.0 PAMAM-Pal membrane, while only 23.70 mg/g, 17.74 mg/g and 14.87 mg/g could be obtained for unmodified membranes in the same conditions. The high adsorption capacity can be ascribed to the large number of amine-terminated groups, amide groups and carbonyl groups of the composite membrane. The above results indicated that the prepared composite membrane has a high adsorption capacity for heavy metal ions removal in water treatment.

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Novel hyperbranched polyurethane resins for the removal of heavy metal ions from aqueous solution

Cited by 46 publications

References 42 publications

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Study on melamine/bentonite polyurethane porous composite foam: Pb²⁺ adsorption and mechanical properties

Preparation of PVDF/Hyperbranched-Nano-Palygorskite Composite Membrane for Efficient Removal of Heavy Metal Ions

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Novel hyperbranched polyurethane resins for the removal of heavy metal ions from aqueous solution

Cited by 46 publications

References 42 publications

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Study on melamine/bentonite polyurethane porous composite foam: Pb2+ adsorption and mechanical properties

Preparation of PVDF/Hyperbranched-Nano-Palygorskite Composite Membrane for Efficient Removal of Heavy Metal Ions

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Study on melamine/bentonite polyurethane porous composite foam: Pb²⁺ adsorption and mechanical properties