Novel poly-glutamic acid functionalized microfiltration membranes for sorption of heavy metals at high capacity

Bhattacharyya, Dibakar; Hestekin, Jamie A.; Brushaber, P; Cullen, Lawrence; Bachas, Leonidas G.; Sikdar, Subhas K.

doi:10.1016/s0376-7388(97)00301-3

Cited by 139 publications

(93 citation statements)

References 35 publications

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“…32) PGA is synthesized by several microorganisms; however, for commercial proposes, Bacillus species (B. licheniformis and B. subtilis) are generally used to produce PGA. 30,[34][35][36] The PGA used in this study was synthesized by Bacillus subtilis chungkookjang, and the D : L ratio is 7 : 3. We examined SEM imag- es of the PGA (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…1) However, except for a very few reports on the use of PGA for metal removal, its application as an adsorbent needs further investigation. 2,3,27,30) In addition, there are no reports on removal or adsorption of cationic dyes in binary solution systems; therefore, investigation of adsorption of MB and CV onto PGA is very useful both for water purification and to expand the application of PGA in industrial fields. In this study, the adsorption mechanism of cationic dyes onto PGA from a single or binary solution system is evaluated based on the molecular weight (MW) of PGA, initial dye concentration, solution pH, and temperature on adsorption.…”

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confidence: 99%

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Adsorption Capability of Cationic Dyes (Methylene Blue and Crystal Violet) onto Poly-γ-glutamic Acid

Ogata

Nagai

Kawasaki

2017

CHEMICAL & PHARMACEUTICAL BULLETIN

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In this study, the adsorption capability of cationic dyes, which were methylene blue and crystal violet, by poly-γ-glutamic acid (PGA) in a single or binary solution system was investigated. The effect of the molecular weight of PGA, initial dye concentration, solution pH, and temperature on the adsorption of dyes was evaluated. The adsorption mechanism of dyes onto PGA was the interaction between -COOH group on the PGA surface and the polarity groups of dyes. These results indicated that PGA is useful for removal of dyes and cationic organic compounds from a single or binary solution system.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Adsorption Capability of Cationic Dyes (Methylene Blue and Crystal Violet) onto Poly-γ-glutamic Acid

Ogata

Nagai

Kawasaki

2017

CHEMICAL & PHARMACEUTICAL BULLETIN

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“…The behavior of various materials functionalized with polypeptides and other molecules is a topic of interest because of its applications in affinity separations, biosensors, and other uses including site-specific interactions [8]. An example of the latter involves the removal of heavy metals from aqueous solutions [9][10][11][12]. These sorbents are made of a variety of materials containing many different functional groups.…”

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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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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Novel poly-glutamic acid functionalized microfiltration membranes for sorption of heavy metals at high capacity

Cited by 139 publications

References 35 publications

Adsorption Capability of Cationic Dyes (Methylene Blue and Crystal Violet) onto Poly-γ-glutamic Acid

Adsorption Capability of Cationic Dyes (Methylene Blue and Crystal Violet) onto Poly-γ-glutamic Acid

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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