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Removal of humic acid fractions by Rhizopus arrhizus: uptake and kinetic studies

Zhou, J.L. and Banks, C.J. (1991) Removal of humic acid fractions by Rhizopus arrhizus: uptake and kinetic studies Environmental Technology, 12, (10), pp. 859-869. (doi:10.1080/09593339109385080).

Record type: Article

Abstract

Humic acid components HFO-A and HPI-N were studied for their removal by Rhizopus arrhizus. The removal was stimulated by the presence of sucrose followed by pretreating biomass with formaldehyde or autoclaving. The presence of Cd2+ ions and high ionic strength in solution was found to increase the adsorptive capacity of R. arrhizus for HPO-A and HPI-N. The uptake of HPO-A and HPI-N by R. arrhizus was biphasic in nature and generally a much slower process than heavy metal biosorption. The first phase was rapid and independent of metabolic energy while the second phase was slow and dependent on metabolic energy. The infrared spectra showed no chemical reaction has occurred between cell walls and adsorbates. Physical adsorption is therefore the main mechanism of humic removal by inactive R. arrhizus.

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More information

Published date: October 1991
Keywords: humic acid, fungi, uptake, kinetics, decomposition

Identifiers

Local EPrints ID: 74929
URI: http://eprints.soton.ac.uk/id/eprint/74929
ISSN: 0959-3330
PURE UUID: 1c536414-bdb9-4824-9013-37e5e97c3e24

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:44

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