dc.contributor.author |
Shen, Na
|
|
dc.contributor.author |
Chirwa, Evans M.N.
|
|
dc.date.accessioned |
2019-07-16T12:00:12Z |
|
dc.date.issued |
2019-06 |
|
dc.description.abstract |
The challenge of economical separation of tiny microalgal cells from diluted solutions restricts their industry commercialization as promising biosorbents. In this study, The freshwater self-flocculating microalga Tetradesmus obliquus AS-6-1 was used as biosorbent to recover gold from wastewater. Maximum Au(III) adsorption capacity was obtained at optimal conditions of 0.1 g L−1 biomass, pH 2.0, 25 °C within 30 min for an initial concentration of 5 mg L−1. The higher maximum adsorption capacity (qm) and Langmuir constant (b) for T. obliquus AS-6-1 indicated its potential as efficient adsorbent for gold recovery. Detailed surface characterization demonstrated that polysaccharides excreted from the self-flocculating microalga were responsible for the better adsorption performance of T. obliquus AS-6-1. Flocculating activity results showed that T. obliquus AS-6-1 could efficiently settle down at the bottom by bio-flocculation within 20 min. The regenerated microalgae in the funnel reactor retained high adsorption efficiency of > 97% in the first two adsorption/desorption cycles. The results from this study firstly demonstrated that the self-flocculating microalga not only benefited its biomass recovery by its bio-flocculating property but also improved its potential for gold recovery from wastewater. |
en_ZA |
dc.description.department |
Chemical Engineering |
en_ZA |
dc.description.embargo |
2020-06-01 |
|
dc.description.librarian |
hj2019 |
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 |
https://link.springer.com/journal/10811 |
en_ZA |
dc.identifier.citation |
Shen, N. & Chirwa, E.M.N. Short-term adsorption of gold using self-flocculating microalga from wastewater and its regeneration potential by bio-flocculation. Journal of Applied Phycology (2019) 31: 1783-1792. https://doi.org/10.1007/s10811-018-1670-4. |
en_ZA |
dc.identifier.issn |
0921-8971 (print) |
|
dc.identifier.issn |
1573-5176 (online) |
|
dc.identifier.other |
10.1007/s10811-018-1670-4 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/70738 |
|
dc.language.iso |
en |
en_ZA |
dc.publisher |
Springer |
en_ZA |
dc.rights |
© Springer Nature B.V. 2018. The original publication is available at : https://link.springer.com/journal/10811. |
en_ZA |
dc.subject |
Regeneration |
en_ZA |
dc.subject |
Bio-flocculation |
en_ZA |
dc.subject |
Gold recovery |
en_ZA |
dc.subject |
Biosorption |
en_ZA |
dc.subject |
Self-flocculating microalga |
en_ZA |
dc.subject |
Chlorophyta |
en_ZA |
dc.subject |
Metal ions |
en_ZA |
dc.subject |
Alga |
en_ZA |
dc.subject |
Gold(III) |
en_ZA |
dc.subject |
Equilibrium |
en_ZA |
dc.subject |
Nanoparticles |
en_ZA |
dc.subject |
Kinetics |
en_ZA |
dc.subject |
Biomass |
en_ZA |
dc.subject |
Precious metals |
en_ZA |
dc.subject |
Selective recovery |
en_ZA |
dc.title |
Short-term adsorption of gold using self-flocculating microalga from wastewater and its regeneration potential by bio-flocculation |
en_ZA |
dc.type |
Postprint Article |
en_ZA |