Polypropylene–Polypropylene-Grafted-Maleic Anhydride–Montmorillonite Clay Nanocomposites for Pb(II) Removal

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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“…From Fig. 11B it was analyzed that maximum removal of Pb (II) had 98% at 90 min contact time as reported earlier 25 .…”

Section: Resultsmentioning

confidence: 54%

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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“…(i) ermal stability for nanocomposite was higher than lean polymer [171] Physically crosslinked polyvinyl alcohol/ bentonite nanocomposite hydrogel Freeze-thawing technique (i) Filler content (clay) increased melting and crystallization enthalpies in the PVA. [172] Polyaniline/Clay nanocomposite In situ polymerization (i) Material with adsorbed heavy metal exhibited lower decomposition temperature than in desorbed state.…”

Section: Melt MIX Extrusionmentioning

confidence: 99%

Review of Clay-Based Nanocomposites as Adsorbents for the Removal of Heavy Metals

Kinoti

Karanja

Nthiga

et al. 2022

Journal of Chemistry

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Due to rapid industrialization, urbanization, and surge in modern human activities, water contamination is a major threat to humanity globally. Contaminants ranging from organic compounds, dyes, to inorganic heavy metals have been of major concern in recent years. This necessitates the development of affordable water remediation technologies to improve water quality. There is a growing interest in nanotechnology recently because of its application in eco-friendly, cost-effective, and durable material production. This study presents a review of recent nanocomposite technologies based on clay, applied in the removal of heavy metals from wastewater, and highlights the shortcomings of existing methods. Recently published reports, articles, and papers on clay-based nanocomposites for the removal of heavy metals have been reviewed. Currently, the most common methods utilized in the removal of heavy metals are reverse osmosis, electrodialysis, ion exchange, and activated carbon. These methods, however, suffer major shortcomings such as inefficiency when trace amounts of contaminant are involved, uneconomical costs of operation and maintenance, and production of contaminated sludge. The abundance of clay on the Earth’s surface and the ease of modification to improve adsorption capabilities have made it a viable candidate for the synthesis of nanocomposites. Organoclay nanocomposites such as polyacrylamide-bentonite, polyaniline-montmorillonite, and β-cyclodextrin-bentonite have been synthesized for the selective removal of various heavy metals such as Cu2+, Co2+, among others. Bacterial clay nanocomposites such as E. coli kaolinite nanocomposites have also been successfully synthesized and applied in the removal of heavy metals. Low-cost nanocomposites of clay using biopolymers like chitosan and cellulose are especially in demand due to the cumulative abundance of these materials in the environment. A comparative analysis of different synthetic processes to efficiently remove heavy metal contaminants with clay-based nanocomposite adsorbents is made.

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“…Water pollution caused due to industrial waste is one of the most challenging issues, especially in the developing countries. Pollution caused by heavy metals from industrial wastewater is of great concern due to their hazardous effects seen in human beings and the environment [8]. These heavy metals are non-biodegradable and can easily enter the food chain through its accumulation in living organisms.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Microcellular Injection Molded Polyolefin/Polycaprolactone Composites

Hwang

Chen

Yang

2021

MSF

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This study investigated the effect of polycaprolactone (PCL) loading (0.5, 1, and 3 wt%) on the morphology, tensile strength, and thermal properties of microcellular injection molded PP/PCL and PPgMA/PCL composites. We used the filler, PCL, that is micro-material in size. Results showed that 0.5 wt% loading of PCL on foamed PP has the largest tensile strength. However, tensile strength was almost similar to that of PPgMA composites. Tensile strength depends on the filler dispersion in the matrix and cell size present on the foamed composites. Good dispersion resulted in good tensile strength. The elongation decreased on PP but increased on PPgMA composites. The highest degradation temperature for PP/PCL and PPgMA/PCL was noted for 3.0 wt% PCL loading and neat PPgMA respectively. Cell size decreased and cell density increased with the addition of PCL into the PP and PPgMA matrix.

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Polypropylene–Polypropylene-Grafted-Maleic Anhydride–Montmorillonite Clay Nanocomposites for Pb(II) Removal

Cited by 12 publications

References 24 publications

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

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

Review of Clay-Based Nanocomposites as Adsorbents for the Removal of Heavy Metals

Synthesis and Characterization of Microcellular Injection Molded Polyolefin/Polycaprolactone Composites

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