Biosorption and desorption potential of gold(III) by freshwater microalgae scenedesmus obliquus as-6-1
dc.contributor.author | Shen, Na | |
dc.contributor.author | Chirwa, Evans M.N. | |
dc.date.accessioned | 2018-08-24T12:37:05Z | |
dc.date.available | 2018-08-24T12:37:05Z | |
dc.date.issued | 2018 | |
dc.description.abstract | Biosorption is an eco-friendly and cost-effective way for recovering gold from high-volume and lowconcentration wastewater. In this study, the freshwater microalgae Scenedesmus obliquus AS-6-1 were used as biosorbent for gold(III) in short-term batch tests. For an initial gold(III) concentration of 5 mg/L, the optimum condition of gold(III) adsorption was 0.10 g/L biomass dosage, the temperatures in the range of 20 - 25 °C, pH 2.0 within 30 min. The level of Au (III) uptake by S. obliquus AS-6-1 could approach 15 % of the organism’s dry weight at the optimum conditions with an initial concentration of 20 mg/L. The gold-loaded biomass of S. obliquus AS-6-1 was able to be regenerated by 0.1 M thiourea at pH 2.0 and its desorption efficiency retained 95 %, 94 % and 88 %, respectively, in three alternating adsorption/desorption cycles. The current experiments suggest that the freshwater microalga S. obliquus AS-6-1 is a promising and efficient biosorbent for gold recovery. | en_ZA |
dc.description.department | Chemical Engineering | en_ZA |
dc.description.librarian | am2018 | en_ZA |
dc.description.sponsorship | The Sedibeng Water, South Africa and the Water Utilization and Environmental Engineering Division at the University of Pretoria. | en_ZA |
dc.description.uri | http://www.aidic.it/cet | en_ZA |
dc.identifier.citation | Shen N., Chirwa E., 2018, Biosorption and desorption potential of gold(iii) by freshwater microalgae scenedesmus obliquus as-6-1, Chemical Engineering Transactions, 64, 19-24, DOI: 10.3303/CET1864004. | en_ZA |
dc.identifier.issn | 2283-9216 (online) | |
dc.identifier.other | 10.3303/CET1864004 | |
dc.identifier.uri | http://hdl.handle.net/2263/66332 | |
dc.language.iso | en | en_ZA |
dc.publisher | The Italian Association of Chemical Engineering | en_ZA |
dc.rights | © 2017, AIDIC Servizi S.r.l. | en_ZA |
dc.subject | Gold compounds | en_ZA |
dc.subject | Scenedesmus obliquus | en_ZA |
dc.subject | Optimum conditions | en_ZA |
dc.subject | Low concentrations | en_ZA |
dc.subject | Initial concentration | en_ZA |
dc.subject | Freshwater microalgae | en_ZA |
dc.subject | Desorption potentials | en_ZA |
dc.subject | Desorption efficiency | en_ZA |
dc.subject | Adsorption/desorption | en_ZA |
dc.subject | Water | en_ZA |
dc.subject | Microorganisms | en_ZA |
dc.subject | Desorption | en_ZA |
dc.subject | Cost effectiveness | en_ZA |
dc.subject | Biosorption | en_ZA |
dc.subject | Algae | en_ZA |
dc.title | Biosorption and desorption potential of gold(III) by freshwater microalgae scenedesmus obliquus as-6-1 | en_ZA |
dc.type | Article | en_ZA |