Abstract
Immobilisation of heavy metals in a 30-year old active scrap metal yard soil using three waste materials, namely coconut tree sawdust (CTS), sugarcane bagasse (SB) and eggshell (ES) was investigated. The contaminated soil was amended with amendments at application rates of 0 %, 1 % and 3 % (w/w). The effects of amendments on metal accumulation in water spinach (Ipomoea aquatica) and soil metal bioavailability were studied in a pot experiment. All amendments increased biomass yield and reduced metal accumulation in the plant shoots. The bioconcentration factor and translocation factor values of the metals were in the order of Zn > Cu > Pb. The addition of ES, an alternative source of calcium carbonate (CaCO3), has significantly increased soil pH and resulted in marked reduction in soil metal bioavailability. Therefore, CTS, SB and ES are promising low-cost immobilising agents to restore metal contaminated land.
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This work was supported by the Universiti Pendidikan Sultan Idris Malaysia under Research Grant GPU 2013-0120-102-01 and Ministry of Education Malaysia under Research Grant RACE 2012-0150-108-62.
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The authors declare that they have performed experiments that comply with the current laws of Malaysia.
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Kamari, A., Putra, W.P., Yusoff, S.N.M. et al. Immobilisation of Cu, Pb and Zn in Scrap Metal Yard Soil Using Selected Waste Materials. Bull Environ Contam Toxicol 95, 790–795 (2015). https://doi.org/10.1007/s00128-015-1650-1
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DOI: https://doi.org/10.1007/s00128-015-1650-1