Nano Size Magnetite Particles Layered with the Blend of Conductive Polymer and Superadsorbent Hydrogel: A Core–Shell Based Nanocomposite for Trivalent Arsenide Uptake form Aqueous Solution

Moja, T. N.; Mishra, Ajay Kumar; Mishra, Shivani B.

doi:10.1007/s10904-018-0876-x

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…The mechanism of pH dependence of Pb(II) ions’ uptake can be explained by the nature of composite surface–metal binding sites based on the study of Pb (II) adsorption by mixed fly ash [ 37 ], which pointed out that heavy metal ion adsorption could be divided into stages, precipitation and hydrolyses [ 38 ]. The ability of LDPE-g-p-(AN-AAc) to adsorb Pb(II) is attributed to the presence of ions, such as OH− and NH 2+ groups, and the highly negative surface of LDPE-g-p-(AN-AAc), which could attract positively charged (M + ) [ 39 , 40 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Amidoxime Adsorbent by Radiation-Induced Grafting of Acrylonitrile/Acrylic Acid on Polyethylene Film and Its Application in Pb Removal

Khedr

2022

Polymers

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In the aquatic environment, heavy metals such as lead ions Pb (II) are of particular importance. These are due to Pb (II) being toxic at concentrations over 0.01 mg/L, when taken continuously over an extended length of time. Organs including the heart, gut, and kidneys are seriously harmed by Pb (II) intoxication. The neurological, reproductive, and bone systems are also affected. The removal of Pb (II) from aquatic environments is, therefore, crucial. Low density Polyethylene (LDPE) is grafted by radiation with Acrylonitrile and acrylic acid (PE-g-AN/AAc) for the adsorption of Pb (II). Factors that control the grafting process for optimum conditions, such as the effect of solvents, the air atmosphere, inhibitors, comonomer concentration, and composition and irradiation dose, are studied to obtain a high grafting yield without homopolymer formation and a higher water uptake. The results showed that the addition of 2.5% by wt% ferric chloride salt effectively inhibits homoploymerization of a mixture of 30% methanol and 70% H2O used as a solvent in nitrogen. The highest graft yield obtained was 320% at a 25 kGy radiation dose with an 80/20 monomer composition and 60% comonomer concentration. The resulting composite films were characterized by XRD to analyze the dispersion properties of the material, SEM for the surface morphology, FTIR analysis for the functional groups, TGA, DSC for the thermal stability and elongation, and tensile strength for the mechanical properties. The uptake of Pb (II) from lead nitrate aqueous solution by (PE-g-AN/AAc) was observed under different conditions of the degree of grafting, contact time, metal ion concentration, and pH. The results obtained suggest LDPE-g-p (AN/AAc) as a superabsorbent for the Pb (II) ion’s removal from an aqueous solution.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Amidoxime Adsorbent by Radiation-Induced Grafting of Acrylonitrile/Acrylic Acid on Polyethylene Film and Its Application in Pb Removal

Khedr

2022

Polymers

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“…The mechanism of pH dependence of Pb(II) ions uptake can be explained by the nature of composite surface -metal binding sites based on the study of Pb (II) adsorption by mixed fly ash 22 , pointed out that heavy metal ion adsorption could be divided into stages, precipitation or hydrolyses 8 . The ability of PP + PPgMA/CL120DT-CS 2.0 phr to adsorb Pb(II) is attributed to the presence of ions, as OH − , and NH 2+ groups and the highly negative surface of CL120DT, which could attract positively charged (M + ) 23 . Figure 8a indicate adsorption or superficial deposition of Pb (II) onto the adsorbent 21 .…”

Section: Resultsmentioning

confidence: 99%

Melt processing of polypropylene-grafted-maleic anhydride/Chitosan polymer blend functionalized with montmorillonite for the removal of lead ions from aqueous solutions

Moja

Bunekar

Mishra

et al. 2020

Sci Rep

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Heavy metals such as lead ions pb (ii) are a primary concern in the aquatic environment. these is because Pb (II) is poisonous at a threshold limit above 0.01 mg/L, when consumed over a long period of time. pb (ii) poisoning is very harmful to various organs viz. heart, intestine and kidneys. Besides, it affects bones, tissues, nervous and reproductive systems. Hence, it is important to remove Pb (II) from aquatic environment. polypropylene (pp) and polypropylene grafted-maleic-anhydride (pp-g-MA) based nanocomposites reinforced with Chitosan (CS) and modified montmorillonite clay nanofiller (CL120DT) were successfully fabricated using twin screw melt extrusion for adsorption of Pb (II). The resulting nanocomposites were characterized by XRD to analyze the dispersion properties of the material, teM and SeM for surface morphology, ftiR analysis for the functional groups and tGA for thermal stability. pure pp showed two sharp peaks, but there was decreased in the intensity upon adding of CS and CL120DT. Among series of nanocomposites 2.0 phr and 4.0 phr loaded samples shows better storage module than that of pure pp. the uptake of pb (ii) from lead nitrate aqueous solution by pp + PP-g-MA/CL120DT-CS 2.0 phr nanocomposites followed the Langmuir isotherm model, with a remediation of 90.9% at pH 8 and was verified by pseudo-second order kinetic model. These results indicate that pp + PP-g-MA//CL120DT-CS 2.0 phr nanocomposites performed as a superabsorbent for the pb (ii) ion removal from aqueous solution.

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“…3a, black spectrum), the absorption peaks at 3298, 1422 and 1090 cm -1 are attributed to hydroxyl (O-H) stretching vibration, bending vibration of CH-OH and C-O stretching vibration, respectively [37,38]. The characteristic absorption peaks at 2938, 1653, 1333 and 841 cm -1 are the characteristic peaks of carbon chain caused by the symmetrical stretching vibration of C-H, the in-plane bending vibration of C-H, the stretching vibration of C=O in the ester group of incomplete alcoholysis and the stretching vibration of C-C [39]. ATR-FTIR spectrum of the SA beads (Fig.…”

Section: Morphology and Structurementioning

confidence: 99%

Fabrication of poly(vinyl alcohol)/sodium alginate hydrogel beads and its application in photo-Fenton degradation of tetracycline

Liu

Xiao

et al. 2020

J Mater Sci

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Developing a reusable and durable catalyst for heterogeneous photo-Fenton process is of great importance for the practical application in the environment remediation. In this study, poly(vinyl alcohol) (PVA)/sodium alginate (SA) hydrogel beads were constructed using FeCl 3 and boric acid as cross-linking agents. Characterizations and tests were employed to investigate the structure, optical property and durability of the obtained beads. The photo-Fenton performance of the PVA/SA-FeCl 3 beads was evaluated by degradation of tetracycline (TC) under visible-light irradiation. The results show that the constructed beads exhibit porous structure, display a broad absorption band in the visible region and behave excellent stability against mechanic effects. The photocatalytic experiment result indicates that the removal rate of TC reaches 90.5% under optimized conditions, while the removal rate of total organic carbon reaches 28.6%. By analyzing the degradation of TC after adding active species scavengers, a photocatalytic mechanism was proposed. Moreover, PVA/SA-6% FeCl 3 beads could be easily separated and recycled in water purification. This work provides a facile and robust method to construct reusable and durable Fe(III)-containing hydrogel beads with acceptable photo-Fenton catalytic performance under visible-light irradiation, paving the way for its practical application in wastewater treatment.

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Nano Size Magnetite Particles Layered with the Blend of Conductive Polymer and Superadsorbent Hydrogel: A Core–Shell Based Nanocomposite for Trivalent Arsenide Uptake form Aqueous Solution

Cited by 12 publications

References 14 publications

Synthesis of Amidoxime Adsorbent by Radiation-Induced Grafting of Acrylonitrile/Acrylic Acid on Polyethylene Film and Its Application in Pb Removal

Synthesis of Amidoxime Adsorbent by Radiation-Induced Grafting of Acrylonitrile/Acrylic Acid on Polyethylene Film and Its Application in Pb Removal

Melt processing of polypropylene-grafted-maleic anhydride/Chitosan polymer blend functionalized with montmorillonite for the removal of lead ions from aqueous solutions

Fabrication of poly(vinyl alcohol)/sodium alginate hydrogel beads and its application in photo-Fenton degradation of tetracycline

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