Using ICP-OES and SEM-EDX in biosorption studies
Izabela Michalak , Katarzyna Chojnacka , Krzysztof Marycz
AbstractWe have compared the analytical results obtained by inductively coupled plasma optical emission spectroscopy (ICP-OES) and by scanning electron microscopy with an energy dispersive X-ray analytical system (SEM-EDX) in order to explore the mechanism of metal ions biosorption by biomass using two independent methods. The marine macroalga Enteromorpha sp. was enriched with Cu(II), Mn(II), Zn(II), and Co(II) ions via biosorption, and the biosorption capacity of alga determined from the solution and biomass composition before and after biosorption process was compared. The first technique was used to analyze the composition of the natural and metal-loaded biomass, and additionally the composition of the solution before and after biosorption. The second technique was used to obtain a picture of the surface of natural and metal ion-loaded macroalgae, to map the elements on the cell wall of dry biomass, and to determine their concentration before and after biosorption. ICP-OES showed a better precision and lower detection limit than EDX, but SEM-EDX gave more information regarding the sample composition of Enteromorpha sp. Both techniques confirmed that biosorption is a surface phenomenon, in which alkali and alkaline earth metal ions were exchanged by metal ions from aqueous solution.
|Journal series||Microchimica Acta, ISSN 0026-3672, [1436-5073], (A 25 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Biosorption; Microelement ions; Macroalga Enteromorpha sp.; ICP-OES; SEM-EDX|
|Publication indicators||= 40; = 37; : 2014 = 1.035; : 2011 = 3.033 (2) - 2011=2.508 (5)|
|Citation count*||50 (2020-08-07)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.