Please use this identifier to cite or link to this item:
|Title:||Biosorption of lanthanum, cerium, europium, and ytterbium by a brown marine alga, turbinaria conoides|
|Authors:||Vijayaraghavan, K. |
|Source:||Vijayaraghavan, K.,Sathishkumar, M.,Balasubramanian, R. (2010-05-05). Biosorption of lanthanum, cerium, europium, and ytterbium by a brown marine alga, turbinaria conoides. Industrial and Engineering Chemistry Research 49 (9) : 4405-4411. ScholarBank@NUS Repository. https://doi.org/10.1021/ie1000373|
|Abstract:||The ability of a brown marine alga, Turbinaria conoides, to remove four rare-earth elements (REEs; lanthanum, cerium, europium, and ytterbium) was evaluated. Results showed that T. conoides was an excellent biosorbent for all four REEs. The equilibrium pH was found to severely affect the biosorption performance; pH 4.9 ± 0.2 was found to be an optimum pH for favorable biosorption of REEs. The biosorption mechanism was found to proceed mainly by ion-exchange reactions between the lanthanide ions and the carboxyl groups present on the algal surface, confirmed by the pH edge, desorption, and scanning electron microscopy/energy-dispersive X-ray results. Biosorption isotherms were modeled using the Langmuir, Freundlich, and Toth isotherms, with the latter-described REE isotherms with very high correlation coefficients and lower error values. Maximum biosorption uptakes, according to the Langmuir model, were recorded as 154.7, 152.8, 138.2, and 121.2 mg/g for La, Ce, Eu, and Yb, respectively. Biosorption kinetics of REEs was found to be rapid, achieving 90% of total biosorption within 50 min. Desorption was successful with 0.05 M HCl, and the biomass was regenerated and reused for three sorption-desorption cycles without a significant loss in the biosorption capacity. © 2010 American Chemical Society.|
|Source Title:||Industrial and Engineering Chemistry Research|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Dec 13, 2017
WEB OF SCIENCETM
checked on Nov 11, 2017
checked on Dec 9, 2017
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.