A dynamic proof of mercury elimination from solution through a combined sorption-reduction process

Bioresource Technology
Leticia CarroManuel E Sastre de Vicente

Abstract

Physico-chemical factors affecting mercury elimination from solution using fern as sorbent have been analysed. It was demonstrated that interaction of mercury with this biomass follows two processes, adsorption by the functional groups in the biopolymers of the cell wall and reduction by easily oxidized compounds of the biomass. Batch experiments have been done to analyse the effect of pH, ionic strength of the media or competition with other metals. Ionic strength did not show a significant influence in the process, but mercury speciation with the formation of negatively charge complexes represented an important drawback in metal elimination. Continuous flow conditions were also analysed since many industrial applications will require them. These studies allowed distinguishing the two processes: mercury sorption was observed but also reduction of this metal occurs. Reduction to mercury (I) and metallic mercury has been confirmed by scanning electron microscopy analysis of the column filling after the continuous flow experiments.

References

Sep 28, 2004·Biotechnology and Bioengineering·P LodeiroM E Sastre de Vicente
Jul 19, 2005·Water Research·Roberto HerreroManuel E Sastre de Vicente
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Jun 26, 2007·Journal of Hazardous Materials·Xueyan GuoXiao-quan Shan
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Jan 19, 2008·Environmental Science & Technology·Sujoy K DasArun K Guha

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Citations

Jul 4, 2013·International Journal of Phytoremediation·B SaradaCh V R Murthy
May 31, 2011·Journal of Hazardous Materials·Leticia CarroManuel E Sastre de Vicente
Oct 13, 2016·Chemosphere·Patricia Balderas-HernándezJorge Juárez-Gómez

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