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Physicochemical characterisation of the ubiquitous bracken fern as useful biomaterial for preconcentration of heavy metals

Physicochemical characterisation of the ubiquitous bracken fern as useful biomaterial for preconcentration of heavy metals
Physicochemical characterisation of the ubiquitous bracken fern as useful biomaterial for preconcentration of heavy metals
Batch experiments with dry bracken fern have been done to determine cadmium and lead sequestering capacity of this biomaterial. Biomass characterisation was done by infrared spectroscopy and potentiometric analysis. The effect of pH of the metal containing solution, contact time and initial metal concentration has been studied, together with the acid-base properties of the biomaterial. Results obtained have been analysed using mathematical and modelling techniques. Effect of pH on metal sequestration has been correlated with observed acid-base properties of the natural substrate. Kinetic data analysis provided relevant information about metal sequestration rate, showing important differences between lead and Cadmium, Maximum uptake was found to be the same for both metals 0.410 mmol/g. This value was,also clearly correlated to the number of acidic groups determined for this material which was found to be 0.432 mmol of acidic groups per gram of fern. Results obtained indicate that acidic groups are the functional groups responsible of the sequestration of metal ions and that bracken fern is a promising material for metal preconcentration. (C) 2008 Elsevier Ltd. All rights reserved.
Bracken fern, Cadmium(II), Lead(II) Preconcentration
0960-8524
1561-1567
Barriada, Jose L.
dd613ea4-adeb-47b0-aae4-87a3e200a9d7
Caridad, Sergio
c853ca83-f03e-47dd-8c66-952166125f06
Lodeiro, Pablo
f6c1011a-06d0-4095-bc45-2e15e9e492d0
Herrero, Roberto
083bf72e-e314-4edb-86a0-9ba61f35a816
Sastre de Vicente, Manuel E.
8b7b6889-35e4-45aa-adb7-c8124dad5938
Barriada, Jose L.
dd613ea4-adeb-47b0-aae4-87a3e200a9d7
Caridad, Sergio
c853ca83-f03e-47dd-8c66-952166125f06
Lodeiro, Pablo
f6c1011a-06d0-4095-bc45-2e15e9e492d0
Herrero, Roberto
083bf72e-e314-4edb-86a0-9ba61f35a816
Sastre de Vicente, Manuel E.
8b7b6889-35e4-45aa-adb7-c8124dad5938

Barriada, Jose L., Caridad, Sergio, Lodeiro, Pablo, Herrero, Roberto and Sastre de Vicente, Manuel E. (2009) Physicochemical characterisation of the ubiquitous bracken fern as useful biomaterial for preconcentration of heavy metals. Bioresource Technology, 100 (4), 1561-1567. (doi:10.1016/j.biortech.2008.09.027).

Record type: Article

Abstract

Batch experiments with dry bracken fern have been done to determine cadmium and lead sequestering capacity of this biomaterial. Biomass characterisation was done by infrared spectroscopy and potentiometric analysis. The effect of pH of the metal containing solution, contact time and initial metal concentration has been studied, together with the acid-base properties of the biomaterial. Results obtained have been analysed using mathematical and modelling techniques. Effect of pH on metal sequestration has been correlated with observed acid-base properties of the natural substrate. Kinetic data analysis provided relevant information about metal sequestration rate, showing important differences between lead and Cadmium, Maximum uptake was found to be the same for both metals 0.410 mmol/g. This value was,also clearly correlated to the number of acidic groups determined for this material which was found to be 0.432 mmol of acidic groups per gram of fern. Results obtained indicate that acidic groups are the functional groups responsible of the sequestration of metal ions and that bracken fern is a promising material for metal preconcentration. (C) 2008 Elsevier Ltd. All rights reserved.

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More information

Published date: February 2009
Keywords: Bracken fern, Cadmium(II), Lead(II) Preconcentration
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 355091
URI: https://eprints.soton.ac.uk/id/eprint/355091
ISSN: 0960-8524
PURE UUID: ba4f6bfd-81c4-455f-912e-093c86256fc3

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Date deposited: 30 Jul 2013 08:58
Last modified: 18 Jul 2017 03:50

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