Laboratory study of impacts of concrete fragment sizes on wetland water chemistry. Issue 1 (2nd January 2018)

• Record Type: Journal Article
• Authors: Wright, Ian A.; Khoury, Rhiannon; Ryan, Michelle M.; Belmer, Nakia; Reynolds, Jason K.
• Is Part Of: Urban water journal. Volume 15:Issue 1(2018)
• Page Start: 61
• Page End: 67
• Publication Date: 2018-01-02
• Subjects: Urban stream syndrome -- alkalization -- storm water -- geochemistry -- dissolution; Municipal water supply -- Management -- Periodicals; Water-supply -- Planning -- Periodicals; 628.1
• DOI: 10.1080/1573062X.2017.1395897
• Languages: English
• ISSNs: 1573-062X

Abstract

Abstract: This study investigated the effects of urban concrete materials, of different particle sizes, immersed in water through a laboratory-based experiment. Water was sourced from a high conservation-value wetland (Blue Mountains upland swamp). Prior to the experiment, wetland water was dilute (32.5 μS/cm), acidic (pH 5.3) and had detectable major ion concentrations of only sodium and chloride. Water was exposed to three treatments of different concrete fragment sizes (whole, crushed and fine). All treatments increased conductivity and pH and also resulted in modified ionic composition where calcium, potassium, hydroxide, carbonate and sulphate were recorded at much high levels. The extent and speed of water chemistry changes was linked to the particle size of the concrete. The results of this study support the hypothesis that concrete can be an environmentally hazardous material influencing water quality in urban catchments.