Role of particle size and composition in metal adsorption by solids deposited on urban road surfaces

Gunawardana, Chandima, Egodawatta, Prasanna, & Goonetilleke, Ashantha (2014) Role of particle size and composition in metal adsorption by solids deposited on urban road surfaces. Environmental Pollution, 184, pp. 44-53.

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Despite common knowledge that the metal content adsorbed by fine particles is relatively higher compared to coarser particles, the reasons for this phenomenon has gained little research attention. The research study discussed in the paper investigated the variations in metal content for different particle sizes of solids associated with pollutant build-up on urban road surfaces. Data analysis confirmed that parameters favourable for metal adsorption to solids such as specific surface area, organic carbon content, effective cation exchange capacity and clay forming minerals content decrease with the increase in particle size. Furthermore, the mineralogical composition of solids was found to be the governing factor influencing the specific surface area and effective cation exchange capacity. There is high quartz content in particles >150µm compared to particles <150µm. As particle size reduces below 150µm, the clay forming minerals content increases, providing favourable physical and chemical properties that influence adsorption.

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ID Code: 63301
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: effective cation exchange capacity, metal adsorption, mineralogy, pollutants build-up, specific surface area, stormwater pollutant processes, stormwater quality
DOI: 10.1016/j.envpol.2013.08.010
ISSN: 0269-7491
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Water Quality Engineering (090508)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier Ltd.
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Environmental Pollution. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Environmental Pollution, [Volume 184, (January 2014)] DOI: 10.1016/j.envpol.2013.08.010
Deposited On: 13 Oct 2013 23:11
Last Modified: 08 Feb 2015 09:56

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