Toxic effects of two acid sulfate soils from the Dabaoshan mine on Corymbia citriodora var.variegata and Daphnia carinata

Liu, Y. and Lin, C. and Ma, Y. and Lu, W. and Wu, Y. and Huang, S. and Zhu, L. and Li, J. and Chen, A. (2009) Toxic effects of two acid sulfate soils from the Dabaoshan mine on Corymbia citriodora var.variegata and Daphnia carinata. Journal of Hazardous Materials, 166 (2-3). pp. 1162-1168. ISSN 0304-3894

Abstract

Acidic, metal-stressed conditions encountered in the acid sulfate soils significantly inhibited the growth of Corymbia citriodora var.variegata, possibly due to the reduced rate of photosynthesis and plant root activity. However, the plant’s self-protection mechanism to counteract stress-induced cellular damage by reactive oxygen species still functioned well even at a soil pH as low as 2.81. This may explain the high tolerance of this plant species to the extremely acidic environments. The observed phytotoxicity symptoms were not accompanied by elevated concentrations of heavy metals in the plant tissues, suggesting that heavy metal levels in plant tissue alone are not valid indications of phytotoxicity to the tested plant species. Leachates from the acid sulfate soils had strong toxicity to Daphnia carinata.Median lethal dilution factor(LDF50)was much higher for the leachate from the highly acidic acid sulfate soils (ASS) than that from the mildly acidic ASS. Although the concentration of various metals markedly decreased with increasing number of leaching cycle, leachate toxicity to Daphnia carinata did not decrease accordingly. This suggests that levels of heavy metals and Al in the leachate are not good indicators of the mine water biotoxicity.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Depositing User: epEditor USQ
Faculty / Department / School: Current - USQ Other
Date Deposited: 25 May 2011 11:46
Last Modified: 17 Oct 2014 00:02
Uncontrolled Keywords: acid mine drainage; ecotoxicity; Corymbia; Daphnia; acid sulphate soil; leaching; heavy metal
Fields of Research (FOR2008): 09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091499 Resources Engineering and Extractive Metallurgy not elsewhere classified
10 Technology > 1002 Environmental Biotechnology > 100204 Environmental Biotechnology Diagnostics (incl. Biosensors)
05 Environmental Sciences > 0503 Soil Sciences > 050302 Land Capability and Soil Degradation
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9605 Ecosystem Assessment and Management > 960508 Ecosystem Assessment and Management of Mining Environments
Identification Number or DOI: doi: 10.1016/j.jhazmat.2008.12.017
URI: http://eprints.usq.edu.au/id/eprint/18832

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