Removal of lead by exopolysaccharides from Paenibacillus peoriae strainTS7 isolated from rhizosphere of durum wheat
| Autor: | Miguel A. Rodríguez-Carvajal, Drifa Yalaoui-Guellal, Yahia Kaci, Samira Fella-Temzi, D. Belhadi, Khodir Madani |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification Rhizosphere Strain (chemistry) Chemistry Metal ions in aqueous solution 030106 microbiology Biosorption Bioengineering Fructose 010501 environmental sciences Polysaccharide 01 natural sciences Applied Microbiology and Biotechnology Metal 03 medical and health sciences chemistry.chemical_compound Adsorption visual_art visual_art.visual_art_medium Agronomy and Crop Science 0105 earth and related environmental sciences Food Science Biotechnology Nuclear chemistry |
| Zdroj: | Biocatalysis and Agricultural Biotechnology. 16:425-432 |
| ISSN: | 1878-8181 |
| DOI: | 10.1016/j.bcab.2018.09.016 |
| Popis: | This work aimed to study the removal of heavy metal ions in aqueous solution by extracellular polysaccharides (EPS) extracted from bacterial strain coded TS7. The 16S ribosomal RNA gene sequencing allowed us to identify this strain as Paenibacillus peoriae . The EPS were defined by GLC-MS and 1 H NMR as a homopolysaccharides of fructose. The effect of contact time, initial metal ions concentration, mass of the polysaccharide and pH on the metal uptake were investigated by employing batch adsorption technique. The results showed that the maximum removal percentage was achieved at 180 min with an initial lead concentration of 100 ppm and the mass of 0.5 g L −1 EPS at pH 6.8. The maximal metal uptake ( q max ) value in Dubinin–Radushkevich (D–R) adsorption isotherm of EPS was found 277.54 mg g −1 . The adsorption surface of the metal at surface of TS7 EPS was confirmed through scanning electron microscopy. Besides, FT-IR analysis indicated that some functional groups of TS7 EPS may play an important role in lead biosorption. |
| Databáze: | OpenAIRE |
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