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 |