Removal Efficiency of Lead (II) by a Biopolymer Poly-y-Glutamic Acid

Abstract:

Lead(Ⅱ) is a typical industrial pollutant which is harmful to people’s health. In this study, a new environmental-friendly material, the edible biopolymer poly--glutamic acid (-PGA) was applied to adsorb lead(Ⅱ). The results revealed that -PGA had pronounced binding effects on lead(Ⅱ) and its metal adsorption capacity was affected by lead(Ⅱ) concentration, -PGA dose and pH of the solution. For lead(Ⅱ) concentration, the removal rate of lead(Ⅱ) increased with the decrease of the metal concentration. For -PGA dose, the removal rate of lead(Ⅱ) increased with the increase of -PGA dose until the turning point at 4000 mg/L and then the tendency was adverse. The maximum removal rate was 92.8 % when lead(Ⅱ) and -PGA concentration was 1000 mg/L and 4000 mg/L separately. For pH, the metal adsorption capacity was weak when pH<4 and the optimal result occurred at pH 5-6.

• Periodical: Applied Mechanics and Materials (Volumes 94-96)
• Pages: 995-998
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.94-96.995
• Online since: September 2011
• Authors: Rui Min Mu, Gui Xia Ma, Xia Zhao
• Keywords: Lead(II), Poly-r-Glutamic Acid, Removal Efficiency

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