Please be patient while the object screen loads.
USC
RESEARCH
BANK
USC Research Bank - University of the Sunshine Coast, Queensland, Australia
Home
About
Show
All
Contribute
Open Access
Copyright
Contact
USC Virtual Herbarium
Recent Additions
Browse USC Research Bank
+
Communities & Collections
By Resource Type
By Supervisor
By Title
by Author/Creator
By Subject
By Year
Search History
Clear Session
Show
Quick Collection
Advanced Search
Home
List Of Titles
Bioremediation of aluminium from the waste water of a conventional water treatment plant using the freshwater macroalga Oedogonium
Add to Quick Collection
Description
Size
Format
PDF - Published Version (Open Access)
1013 KB
Adobe Acrobat PDF
Download
Download All
PDF - Published Version (Open Access)
Title
Bioremediation of aluminium from the waste water of a conventional water treatment plant using the freshwater macroalga Oedogonium
Author/Creator
Roberts, David A
|
Shiels, L
|
Tickle, J
|
Nys, R
|
Paul, Nicholas A
Description
Conventional water treatment processes use aluminium sulphate (alum) as a coagulant in the production of potable water. While alum is an inexpensive and reliable means of treating water, the process generates waste water containing dissolved Al. This waste water is primarily dealt with via on-site retention. In this study we investigate the cultivation of the freshwater macroalga Oedogonium as a means to sequester dissolved Al from waste water from a conventional water treatment plant. Furthermore, we examine the use of CO2 to manipulate the pH of cultivation as a means of enhancing the sequestration of Al by either increasing the productivity of Oedogonium or increasing the bioavailability of Al in the waste water. The relative bioavailability of Al under conditions of CO2 and no-CO2 provision was contrasted by comparing Al uptake by Diffusive Gradients in Thin Films (DGTs). Oedogonium was able to grow rapidly in the waste water (12 g dry weight m-2 day-1) while consistently sequestering Al. The Oedogonium-treated waste water had a sufficiently low Al concentration that it could be used in unrestricted irrigation in the surrounding region. When CO2 was added to the waste water containing concentrations of Al up to 8 mg L-1, there was a slight increase (~10%) in the rate of sequestration of Al by Oedogonium relative to waste water not receiving CO2. This was due to two concurrent processes. The provision of CO2 increased the productivity of Oedogonium by 15% and the bioavailability of Al by up to 200%, as measured by the DGTs. Despite this strong effect of CO2 on Al bioavailability, the increase in Al sequestration by Oedogonium when CO2 was provided was modest (~10%). Al was sequestered by Oedogonium to concentrations below permissible limits for discharge without the need for the addition CO2. The cultivation of Oedogonium in waste water from conventional treatments plants can simultaneously treat waste water for re-use and provide a biomass source for value-added applications. © 2018 by the authors.
Relation
Water (Switzerland) / Vol. 10, No. 5, Article No. 626
Relation
http://dx.doi.org/10.3390/w10050626
Year
2018
Publisher
M D P I AG
Subject
FoR multidisciplinary
|
conventional water treatment
|
bioremediation
|
macroalgae
|
aluminium
|
alum
|
coagulation
|
flocculent
Resource Type
Journal Article
Identifier
ISSN: 2073-4441
Rights
Copyright © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Reviewed
309 Visitors
4 Downloads
Save/E-mail Citation
Citation Format
Plain Text Citation
HTML Citation
EndNote Format
E-mail Address
Subject
OR
© 2012 University of the Sunshine Coast, Queensland, Australia | ABN 28 441 859 157 | CRICOS Provider No. 01595D