Biosorption of silver ions by processed Aspergillus niger biomass
| Autor: | Md. Naseem Akthar, K. Sivarama Sastry, P. Maruthi Mohan |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
biology
Chemistry Aspergillus niger Biosorption Bioengineering Sorption General Medicine engineering.material Alkali metal biology.organism_classification Applied Microbiology and Biotechnology Metal Adsorption visual_art Desorption Botany engineering visual_art.visual_art_medium Noble metal Biotechnology Nuclear chemistry |
| Zdroj: | Biotechnology Letters. 17:551-556 |
| ISSN: | 1573-6776 0141-5492 |
| DOI: | 10.1007/bf00132027 |
| Popis: | An alkali treated A. niger biomass was found to efficiently sequester silver ions from dilute as well as concentrated solutions (2.5–1000 ppm Ag+), with an ability to bind it to a level of upto 10% of dry weight. Biosorption of silver ions was not influenced by pH between 5–7. The bound Ag+ could be fully desorbed by dilute HNO3 and the biosorbent regenerated by washing with Ca2+/Mg2+ solution. This biosorbent is unique in that the mechanism of metal ion sorption has been found to be exclusively by stoichiometric exchange with Ca2+ and Mg2+ of the biosorbent. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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