Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2.

Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2. Research Abstract Details 

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Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2. Abstract Text:

Jun Yao,Hong Xu,Jun Wang,Min Jiang,Pingkai Ouyang,

Poly(gamma-glutamic acid) (gamma-PGA) derived from Bacillus subtilis NX-2 was investigated as a sorbent for heavy metal ions in batch adsorption experiments. The results showed that the heavy metal adsorption capacity of gamma-PGA enhanced with the increase of pH, in the following order: Cr(III) > Cu(II) > Ni(II), within the pH range 3-5. The Langmuir sorption model effectively described the metal sorption of y-PGA through the experiments of isotherm sorption, and it was deduced that the affinity of gamma-PGA for metals was following the sequence: Cr(III) > Cu(II) > Ni(II). Gamma-PGA was also used to trap trace amounts of heavy metals from the electroplating wastewater, which were difficult to be entirely removed by the traditional hydroxide precipitation method. The results showed that Cr(III) and Ni(II) in the electroplating effluent decreased from 3.07 and 9.46 mg/l to 0.15 and 1.01 mg/l, respectively, and the treated solutions reached the effluent standard. Therefore, gamma-PGA is satisfactory as a well biosorbent for the removal of heavy metals. The adsorption mechanism of gamma-PGA binding heavy metals was also studied using HyperChem simulation and FT-IR.

Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2. Publishing Authors By Initials

J Yao,H Xu,J Wang,M Jiang,P Ouyang,

For similar chemical actions and uses: toxic actions: environmental pollutants: water pollutants: water pollutants, chemical research abstracts see: chemical actions and uses: toxic actions: environmental pollutants: water pollutants: water pollutants, chemical research

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Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biomaterials science. Polymer edition

VOLUME: 18

Page Numbers: 193-204

Journal Abbreviation:

ISSN: 0920-5063

DAY: 20

MONTH: 02

YEAR: 2007

Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9007393

Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2. Keywords Mesh Terms:

KEYWORDS: Water Pollutants, Chemical

MESH TERMS: pharmacokinetics

Chemical & Substance for Abstract: Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2. Information

Substance Name: Copper

Registry Number: 7440-50-8

Grant and Affiliation Information for Removal of Cr(III), Ni(II) and Cu(II) by poly(gamma-glutamic acid) from Bacillus subtilis NX-2.

AFFILIATION: College of Life Science and Pharmacy, Nanjing University of Technology, New Model Road No.5, Nanjing 210009, P. R. China.

Country: Netherlands

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MEDLINETA: J Biomater Sci Polym Ed

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