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

A dynamic proof of mercury elimination from solution through a combined sorption-reduction process
A dynamic proof of mercury elimination from solution through a combined sorption-reduction process
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.
Mercury, Biosorption, Reduction, Bracken fern, Column studies
0960-8524
8969-8974
Carro, Leticia
ebfa038b-e17d-45df-b560-a3ce6a8f38e0
Anagnostopoulos, Vasilis
51b2bf49-6886-4c09-ad5e-d775a016dc1b
Lodeiro, Pablo
f6c1011a-06d0-4095-bc45-2e15e9e492d0
Barriada, Jose L.
dd613ea4-adeb-47b0-aae4-87a3e200a9d7
Herrero, Roberto
083bf72e-e314-4edb-86a0-9ba61f35a816
Sastre de Vicente, Manuel E.
8b7b6889-35e4-45aa-adb7-c8124dad5938
Carro, Leticia
ebfa038b-e17d-45df-b560-a3ce6a8f38e0
Anagnostopoulos, Vasilis
51b2bf49-6886-4c09-ad5e-d775a016dc1b
Lodeiro, Pablo
f6c1011a-06d0-4095-bc45-2e15e9e492d0
Barriada, Jose L.
dd613ea4-adeb-47b0-aae4-87a3e200a9d7
Herrero, Roberto
083bf72e-e314-4edb-86a0-9ba61f35a816
Sastre de Vicente, Manuel E.
8b7b6889-35e4-45aa-adb7-c8124dad5938

Carro, Leticia, Anagnostopoulos, Vasilis, Lodeiro, Pablo, Barriada, Jose L., Herrero, Roberto and Sastre de Vicente, Manuel E. (2010) A dynamic proof of mercury elimination from solution through a combined sorption-reduction process. Bioresource Technology, 101 (23), 8969-8974. (doi:10.1016/j.biortech.2010.06.118).

Record type: Article

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.

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More information

Published date: December 2010
Keywords: Mercury, Biosorption, Reduction, Bracken fern, Column studies
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 354269
URI: https://eprints.soton.ac.uk/id/eprint/354269
ISSN: 0960-8524
PURE UUID: 11958529-6ce8-4589-9c13-291014f4baa7

Catalogue record

Date deposited: 05 Jul 2013 08:55
Last modified: 18 Jul 2017 03:57

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