Bryophytes and its heavy metal accumulation in mercury-gold ore belt in the karst area of southeast Guizhou

LIU Rong-xiang; ZHANG Zhao-hui

doi:10.3969/j.issn.1001-4810.2010.01.008

Volume 29 Issue 1

Mar. 2010

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LIU Rong-xiang, ZHANG Zhao-hui. Bryophytes and its heavy metal accumulation in mercury-gold ore belt in the karst area of southeast Guizhou[J]. CARSOLOGICA SINICA, 2010, 29(1): 41-47. doi: 10.3969/j.issn.1001-4810.2010.01.008

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LIU Rong-xiang, ZHANG Zhao-hui. Bryophytes and its heavy metal accumulation in mercury-gold ore belt in the karst area of southeast Guizhou[J]. CARSOLOGICA SINICA, 2010, 29(1): 41-47. doi: 10.3969/j.issn.1001-4810.2010.01.008

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Bryophytes and its heavy metal accumulation in mercury-gold ore belt in the karst area of southeast Guizhou

doi: 10.3969/j.issn.1001-4810.2010.01.008

LIU Rong-xiang¹,
ZHANG Zhao-hui²

1.
Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province
2.
School of Life Sciences, Guizhou Normal University

Received Date: 2009-08-11
Publish Date: 2010-03-25

Abstract

Abstract

The San-Dan (Sandu-Danzhai) Mercury-Gold Ore Belt in the karst area of southeast Guizhou belongs to the Carlin-type mercury-gold deposits. Long-term mercury ore and gold ore exploiting and smelting led to serious environmental pollution in San-Dan Mercury Belt. Based on extensive investigation of the bryophytes in the area, it is discovered that the bryoflora consists of 58 species and 26 genera in 13 families. The dominant families are Bryaceae and Pottiaceae. The concentration of Cd, Pb, Cu, Zn, Ca, Mg, As and Hg in bryophytes and their substrates are measured. Hydrogonium consanguineum, Bryum algovicum, Weisia controversa, Bryum lonchocaulon, Trichostomum crispulum, Haplocladium angustifolium, Entodon aeruginosus and Entodon aeruginosus are the dominant species in Mercury-Gold Belt. The results show that Ca concentration is the highest, Mg the second and the Cd the lowest in the plants of eight main species of bryophytes. Hg-Zn shows prefect correlation at 0.01 level, Hg-Pb shows coefficient at 0.05 leve1, but As-Cd shows negative correlation at 0.05 leve1. Based on the analysis on the accumulation coefficient, all the eight species have ability to accumulate Copper. Weisia controversa and Bryum algovicum could accumulate more than four types of heavy metals. It indicates that these two species have strong tolerance to contamination by Mercury-Gold ore belt and is good materials to be used for bioremediation and comprehensive treatment of abandoned mining site.
- bryophytes,
- karst,
- accumulation coefficient,
- heavy mental pollution,
- mercury-gold ore belt

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References(33)

References

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Bryophytes and its heavy metal accumulation in mercury-gold ore belt in the karst area of southeast Guizhou

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