Selective separation of heavy metal ions using amine-rich polyamide TFC membrane

Sum, Jing Yao; Ahmad, Anees; Ooi, B. S.

doi:10.1016/j.jiec.2019.03.052

Cited by 27 publications

(7 citation statements)

References 34 publications

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“…The sensing characteristics of polymer nanoparticles depend on the chemical and structural alterations because of the polymer and nanoparticles interaction with the environment affording a subsequent output usually as an optical or electrical signal (Zare et al 2014;Ahmad et al 2019;Belbruno 2019;Boyaciyan and von Klitzing 2019). Subramanian et al (2018) detected the vapors of toluene and benzene at room temperature with polyaniline metal oxide composite (TiO 2 /SnO 2 ). The interaction of sensor material and vapors of analyte occurs by surface adsorption.…”

Section: Sensorsmentioning

confidence: 99%

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

et al. 2020

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The inert nature of most commercial polymers and nanomaterials results in limitations of applications in various industrial fields. This can be solved by surface modifications to improve physicochemical and biological properties, such as adhesion, printability, wetting and biocompatibility. Polymer functionalization allows to graft specific moieties and conjugate molecules that improve material performances. In the last decades, several approaches have been designed in the industry and academia to graft functional groups on surfaces. Here, we review surface decoration of polymers and nanomaterials, with focus on major industrial applications in the medical field, textile industry, water treatment and food packaging. We discuss the advantages and challenges of polymer functionalization. More knowledge is needed on the biology behind cell–polymer interactions, nanosafety and manufacturing at the industrial scale.

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Section: Sensorsmentioning

confidence: 99%

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

et al. 2020

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“…Iftekhar et al [65] compared the sorption of a series of REEs on biopolymer-layered double hydroxides LDH hybrid nanocomposites and they concluded that small ionic radii enhanced the sorption; this is contradictory to the trend found with P2-APEI (ionic radii: 1.179 Å for Pr(III) and 1.052 Å for Tm(III)). Phosphonate and amine groups are both considered hard bases [66,67], which are supposed to be more reactive with hard acids. In the case of strong cation exchange resin Dowex 50, Surls and Choppin [68] obtained a linear correlation between the ion-exchange sorbability (the energy of formation of the complex) and the ionic conductance of the REEs (and Am + Cu).…”

Section: Uptake Kineticsmentioning

confidence: 99%

Efficient Recovery of Rare Earth Elements (Pr(III) and Tm(III)) From Mining Residues Using a New Phosphorylated Hydrogel (Algal Biomass/PEI)

Salih

Wei

et al. 2021

Metals

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With the target of recovering rare earth elements (REEs) from acidic leachates, a new functionalized hydrogel was designed, based on the phosphorylation of algal/polyethyleneimine beads. The functionalization strongly increased the sorption efficiency of the raw material for Pr(III) and Tm(III). Diverse techniques were used for characterizing this new material and correlating the sorption performances and mechanisms to the physicochemical structure of the sorbent. First, the work characterized the sorption properties from synthetic solutions with the usual procedures (study of pH effect, uptake kinetics, sorption isotherms, metal desorption and sorbent recycling, and selectivity from multi-element solutions). Optimum pH was found close to 5; sorption isotherms were fitted by the Langmuir equation (maximum sorption capacities close to 2.14 mmol Pr g−1 and 1.57 mmol Tm g−1). Fast uptake kinetics were modeled by the pseudo-second order rate equation. The sorbent was highly selective for REEs against alkali-earth and base metals. The sorbent was remarkably stable for sorption and desorption operation (using 0.2 M HCl/0.5 M CaCl2 solutions). The sorbent was successfully applied to the leachates of Egyptian ore (pug leaching) after a series of pre-treatments (precipitation steps), sorption, and elution. The selective precipitation of REEs using oxalic acid allows for the recovery of a pure REE precipitate.

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“…In all solutions, the pH of the prepared said solutions was not modified and used as it is. Alkaline pH values were prohibited as it will cause precipitation of each cation from its solutions (Sum et al, 2019).…”

Section: Preparation Of Heavy Metal Solutionsmentioning

confidence: 99%

Structure and Potential Applications of Polyamide 6/Protein Electro-spun Nano-fibrous Mats in Sorption of Metal Ions and Dyes from Industrial Effluents

El‐Sayed

Mowafi²,

Taleb³

et al. 2021

JART

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The main objective of this work is the preparation of nano-fibrous mats (NFM) from polyamide 6 (PA6) reinforced and functionalized by renewable proteinic waste and examining their potential use for the sorption of heavy metal ions and dyes from wastewater from textile plants. Two renewable waste biopolymers; namely keratin (from waste of wool combing) and sericin (from degumming of natural silk) were extracted and regenerated. NFM were prepared by electro-spinning of PA6/ biopolymer composites in formic acid using nozzle-less electro-spinneret. The potential of the prepared mats for sorption of Cr+6, Cr+3, Cu+2, and Pb+2 cations as well as anionic and cationic dyes from wastewater was assessed. The prepared composites were characterized by measuring their viscosity, nano-fibre diameter, pore size, thickness, and air permeability. The morphological structure of the electro-spun NFM was investigated by scanning electron Microscopy. Chemical and physical properties of the obtained mat were studied FTIR, TGA, DSC, and XRD. The capacity of the prepared NFM for sorption of cations and dyes depended on the mat composition and the nature of the adsorbed cation or dye. This work meets some environmental and economic demand by extraction of keratin and sericin from waste materials and their utilization in reinforcement of PA6 NFM for sorption of selected cations as well as dyes from textile effluents.

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Selective separation of heavy metal ions using amine-rich polyamide TFC membrane

Cited by 27 publications

References 34 publications

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

Efficient Recovery of Rare Earth Elements (Pr(III) and Tm(III)) From Mining Residues Using a New Phosphorylated Hydrogel (Algal Biomass/PEI)

Structure and Potential Applications of Polyamide 6/Protein Electro-spun Nano-fibrous Mats in Sorption of Metal Ions and Dyes from Industrial Effluents

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