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Accumulation of Heavy Metals in Soil during Primary Succession in Hailuogou Glacier Retreat Area (Vol. 48, No.4, Tot No.336) TEXT SIZE: A A A

YANG Danli1, 2, LUO Ji1, LI Wei1, HE Yongmei1, 3

(1. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041 China;
2. College of Earth Sciences, Chengdu University of Technology, Chengdu 610101, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract: This paper studied the accumulation of heavy metal storage during the soil formation process in the last 127 years and tacked the pollution history by using the primary succession sequence formed in the Hailuogou Glacier Retreat Area. Our results showed that: (1) The content characteristics of Cr, Mn, Ni, Cu, Zn, As, Cd and Pb in different stages of the primary succession were different, while Pb, Zn and Cd were significantly enriched in surface soil, their enrichment coefficients in the semi-decomposed layer were 4.23, 5.04 and 37.18, respectively, and decreased slightly and correspondingly in the fully decomposed layer. (2) With the development of the succession, storages of Pb, Zn and Cd in surface soil increased and reached 13.01 kg/hm2, 32.19 kg/hm2 and 0.68 kg/hm2, respectively, at the end of the succession, but their accumulation rates peaked around 1965, which may be related to the heavy atmospheric pollution in this period. (3) In addition to atmospheric deposition, the return of litter is also an important factor in affecting of Pb, Zn and Cd in surface soil.

Key words: primary succession; heavy metal; soil; storage

EARTH AND ENVIRONMENT Vol.48, No.4, Tot No.336, 2020, Page 424-431

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