Biosorption and desorption potential of gold(III) by freshwater microalgae scenedesmus obliquus as-6-1

dc.contributor.authorShen, Na
dc.contributor.authorChirwa, Evans M.N.
dc.date.accessioned2018-08-24T12:37:05Z
dc.date.available2018-08-24T12:37:05Z
dc.date.issued2018
dc.description.abstractBiosorption 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.departmentChemical Engineeringen_ZA
dc.description.librarianam2018en_ZA
dc.description.sponsorshipThe Sedibeng Water, South Africa and the Water Utilization and Environmental Engineering Division at the University of Pretoria.en_ZA
dc.description.urihttp://www.aidic.it/ceten_ZA
dc.identifier.citationShen 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.issn2283-9216 (online)
dc.identifier.other10.3303/CET1864004
dc.identifier.urihttp://hdl.handle.net/2263/66332
dc.language.isoenen_ZA
dc.publisherThe Italian Association of Chemical Engineeringen_ZA
dc.rights© 2017, AIDIC Servizi S.r.l.en_ZA
dc.subjectGold compoundsen_ZA
dc.subjectScenedesmus obliquusen_ZA
dc.subjectOptimum conditionsen_ZA
dc.subjectLow concentrationsen_ZA
dc.subjectInitial concentrationen_ZA
dc.subjectFreshwater microalgaeen_ZA
dc.subjectDesorption potentialsen_ZA
dc.subjectDesorption efficiencyen_ZA
dc.subjectAdsorption/desorptionen_ZA
dc.subjectWateren_ZA
dc.subjectMicroorganismsen_ZA
dc.subjectDesorptionen_ZA
dc.subjectCost effectivenessen_ZA
dc.subjectBiosorptionen_ZA
dc.subjectAlgaeen_ZA
dc.titleBiosorption and desorption potential of gold(III) by freshwater microalgae scenedesmus obliquus as-6-1en_ZA
dc.typeArticleen_ZA

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