Mining of the Chaihe Pb-Zn Deposit in Liaoning Province and Reconstruction of Its Heavy Metal Pollution Record

Abstract

Abstract:

The heavy metal pollution of soil resulting from Pb-Zn mining mainly appears within 3 to 5 km around the mine area of Chaihe Pb-Zn deposit, Liaoning Province, and the pH value clearly reveals soil acidification of the region, thanks on the results from soil geochemical survey over the mining area of Chaihe Pb-Zn deposit and its surrounding area. History of heavy metal pollution reconstructed from the profile of overbank sediment indicates that S concentration kept continueously increasing, and the pH dropped by 2 units since 1820 at the outlet of Chaihe reservoir. Whereas after 1900, Cd, Pb, and Zn in overbank sediment accumulated evidently, and the content of Pb and Hg in sediment profile declined after the cease of Pb-Zn mining. Soil acidification may remove Cd and Zn from accumulated in soil to water and sediment, and to result a potential risks to fish in Chaihe reservoir.

Key words: heavy metal, reconstruction of pollution record, Chaihe Pb-Zn deposit, Liaoning

CLC Number:

P595
X142

QIN Ai-hua ，YU Cheng-guang ，LI Kuo ，YANG Ke. Mining of the Chaihe Pb-Zn Deposit in Liaoning Province and Reconstruction of Its Heavy Metal Pollution Record[J]. Geoscience, 2014, 28(3): 537-542.

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Mining of the Chaihe Pb-Zn Deposit in Liaoning Province and Reconstruction of Its Heavy Metal Pollution Record

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