Surface Modification of Silica- and Cellulose-Based Microfiltration Membranes with Functional Polyamino Acids for Heavy Metal Sorption

Ritchie, Stephen M.; Bachas, Leonidas G.; Olin, Trudy J.; Sikdar, Subhas K.; Bhattacharyya, Dibakar

doi:10.1021/la9814438

Cited by 108 publications

(63 citation statements)

References 39 publications

(99 reference statements)

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“…The absorbent was regenerated by washing with 6% NaCl, which resulted in the recovery of approximately 98.8% of its original performance. Ritchie et al (1999) prepared cellulosic membrane-based sorbents, functionalized with polyamino acids and observed high-capacity (3-14 mmol metal/g of sorbent) metal (Pb 2+ , Cu 2+, and Cd 2+ ) sorption. It was revealed that silica-based membrane sorbents possess metal sorption capacities nearly to those of cellulosic-based membranes.…”

Section: Polymeric Membranes For Membrane Adsorptionmentioning

confidence: 99%

Removal of heavy metals and pollutants by membrane adsorption techniques

2018

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Application of polymeric membranes for the adsorption of hazardous pollutants may lead to the development of next-generation reusable and portable water purification appliances. Membranes for membrane adsorption (MA) have the dual function of membrane filtration and adsorption to be very effective to remove trace amounts of pollutants such as cationic heavy metals, anionic phosphates and nitrates. In this review article, recent progresses in the development of MA membranes are surveyed. In addition, recent progresses in the development of advanced adsorbents such as nanoparticles are summarized, since they are potentially useful as fillers in the host membrane to enhance its performance. The future directions of R&D in this field are also shown in the conclusion section.

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Section: Polymeric Membranes For Membrane Adsorptionmentioning

confidence: 99%

Removal of heavy metals and pollutants by membrane adsorption techniques

2018

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“…The metal ion complexes of many amino acids have been investigated [1][2][3][4][5][6]. Surface modification of silica-and cellulose-based microfiltration membranes with functional polyamino acids for heavy metal sorption has been studied [7]. Functionalized membranes represent a field with multiple applications.…”

Section: Introductionmentioning

confidence: 99%

Metal ion–binding properties of the L-aspartic acid and tartaric acid, a coparative investigation. How can be increased the dosage of mineral absorption in the body

Sajadi¹

2010

ABB

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The results mentioned above demonstrate that for some M(Asp) complexes the stability constants is also largely determined by the affinity of metal ions for amine group. This leads to a kind of selectivity of metal ions and transfer them via building complexes with the aspartate. The result of this effect is a higher dosage-absorption of minerals in body. Based on the sort of metal ions, the drug-therapy can be different. For heavy metal ions this building complex helps the absorption and filtration of the blood plasma, and consequently the excursion of heavy metal ions takes place. This is an important method in microdialysis.Other metal ions such as the complexes can be considered as mineral carriers. These complexes in certain conditions (PH-range) can release the minerals in body.

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“…For example, enzymes work only in the presence of such metal ions. The metal ion complexes of many amino acids have been investigated [1][2][3][4][5][6][7]. Ion exchange, chelating, and electrostatic interactions form the basis of metal sorption.…”

Section: Introductionmentioning

confidence: 99%

The Metal Ions Absorption – and Transportation Properties of L-Aspartic Acid in the Body

Sajadi¹,

Alamolhoda²

2010

TOPROCJ

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Abstract:The intra molecular interactions in complexes of Aspartic acid with divalent metal ions (Mg, Ca & Zn) M(Asp) 1 were investigated in this work. The acidity constants of Asp and stability constants of M(Asp) are determined and reported as well. The effect of intra molecular interactions can be seen by comparison of these stability constants. Mg and Ca ions form weaker bonds to Asp than Zn ion. Zn(Asp) complex undergoes an intra molecular interaction and builds a chelate in two forms ( an open -isomer M(Asp) op and a closed -isomer M(Asp) cl ). The concentration independent intra molecular interaction constant for two isomers has been calculated and reported.The obtained results demonstrate that for some M(Asp) complexes the stability constant is largely affected by the affinity of metal ions for amine group. This shows a kind of selectivity of metal ions and transfer them via complex -building with the aspartate. Also all three metal ions complexes could be considered as mineral carriers. These complexes can release the minerals in human body in certain conditions ( e,g. pH -range).

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Surface Modification of Silica- and Cellulose-Based Microfiltration Membranes with Functional Polyamino Acids for Heavy Metal Sorption

Cited by 108 publications

References 39 publications

Removal of heavy metals and pollutants by membrane adsorption techniques

Removal of heavy metals and pollutants by membrane adsorption techniques

Metal ion–binding properties of the L-aspartic acid and tartaric acid, a coparative investigation. How can be increased the dosage of mineral absorption in the body

The Metal Ions Absorption – and Transportation Properties of L-Aspartic Acid in the Body

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