Effect of Temperature on Cadmium Sorption in Sand and Clay

Yassaman Babaee, Farhana Chowdhury, Magdalena Krol

In the proceedings of: GeoSt. John's 2019: 72nd Canadian Geotechnical Conference

Session: Geoenvironmental

ABSTRACT: Global warming effects have resulted in the exploration of new sources of energy. Among different sources of renewable energy, geothermal heating has received great attention especially for heating and cooling of buildings. However, temperature anomalies caused by ground source heat pumps (GSHPs) could have consequences on the quality of groundwater especially when the subsurface is contaminated. The aim of this research is to examine the effect of low temperature heating, on metal sorption onto sandy and clayey soils. For this purpose, clean sand and kaolin were mixed with cadmium solutions at various concentrations. The experiments were conducted at pH=7 and kept at temperatures ranging from 15 to 30 ºC. The result shows cadmium sorption increased with increasing temperatures with higher sorption rates found with kaolin. This suggests that retention of cadmium by the soil will occur as the subsurface temperature increases to as high as 30oC.

RÉSUMÉ: Les effets du réchauffement climatique ont conduit à l'exploration de nouvelles sources d'énergie. Parmi les différentes chauffage et le refroidissement des bâtiments. Toutefois, les anomalies de température causées par les pompes à chaleur géothermiques pourraient avoir des conséquences importantes sur la qualité des eaux souterraines, en particulier lorsque le sol est contaminé. Le but de cette recherche est d'examiner l'effet du chauffage à basse température sur la sorption de cadmium par les grains du sol. À cette fin, du sable propre et du kaolin ont été mélangés à des solutions de cadmium à différentes concentrations. Les expériences ont été menées à pH = 7 et à différentes températures allant de 15 à 30 ºC. Le résultat montre que la sorption de cadmium augmente avec la hausse des températures. Ceci suggère que la rétention de cadmium par le sol se produira à mesure que la température sous la surface augmente.

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Cite this article:
Yassaman Babaee; Farhana Chowdhury; Magdalena Krol (2019) Effect of Temperature on Cadmium Sorption in Sand and Clay in GEO2019. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Geo2019Paper185,author = Yassaman Babaee; Farhana Chowdhury; Magdalena Krol,title = Effect of Temperature on Cadmium Sorption in Sand and Clay,year = 2019}