Browse by author
Lookup NU author(s): Dr Tobias Roetting
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Three laboratory column experiments were performed to test the suitability of two different MgO-rich reagents for removal of Mn and Al from the out-flowing waters of Shilbottle passive treatment system (Northumberland, UK). The input water was doped with 100 mg/L Zn in order to extrapolate results to waters in sulphide mining districts. One column was filled with a Dispersed Alkaline Substrate (DAS) containing 12.5% (v/v) caustic magnesia precipitator dust (CMPD) from Spain mixed with wood shavings, two columns were filled with DAS containing wood shavings and 12.5% or 25% (v/v), respectively, of dolomitic lime precipitator dust (DLPD) from Thrislington, UK. The two columns containing 12.5% of CMPD or DLPD completely removed the contaminants from the inflow water during the first 6 weeks of the experiment (mean removal of 88 mg/L Al, 96 mg/L Zn and 37 mg/L Mn), operating at an acidity load of 140 g acidity/m(2) day. At this moment, a substantial increase of the Al and Mn water concentration in the out-flowing waters of Shilbottle occurred (430 g acidity/m(2) day), leading to passivation of the reactive material and to the development of preferential flow paths within less than another 6 weeks, probably mainly due to Al precipitates. Al should be removed prior to MgO treatment. (C) 2010 Elsevier B.V. All rights reserved.
Author(s): Caraballo MA, Rotting TS, Silva V
Publication type: Article
Publication status: Published
Journal: Journal of Hazardous Materials
Year: 2010
Volume: 181
Issue: 1-3
Pages: 923-930
Print publication date: 01/09/2010
ISSN (print): 0304-3894
ISSN (electronic): 1873-3336
Publisher: Elsevier
URL: http://dx.doi.org/10.1016/j.jhazmat.2010.05.100
DOI: 10.1016/j.jhazmat.2010.05.100
Altmetrics provided by Altmetric
