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Advances in Earth Science >

2017 , Vol. 32 >Issue 8: 885 - 898

DOI: https://doi.org/10.11867/j.issn.1001-8166.2017.08.0885

Orginal Article

Distribution Characteristics and Influencing Factors of Heavy Metals in Pearl River Delta Quaternary Boreholes

  • Zhimin Tang ,
  • Qingye Hou ,
  • Yuanhang You ,
  • Zhongfang Yang ,
  • Kuo Li
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  • 1.School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China
    2.Nanjing Center,China Geological Survey,Nanjing 210016,China
    3.Guangdong Institute of Geological Survey, Guangzhou 510080,China
    4.Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Hebei Langfang 065000, China

First author:Tang Zhimin(1992-),male,Mianyang City,Sichuan Province,Master student. Research areas include environmental geochemistry.E-mail:tangzmh@163.com

*Corresponding author:Hou Qingye(1978-), female, Linfen City, Shanxi Province, Associate professor. Research areas include regional geochemistry and environmental geochemistry.E-mail:qingyehou@126.com

Received date: 2017-02-28

  Revised date: 2017-05-05

  Online published: 2017-08-20

Supported by

Project supported by the China Geological Survey “Geochemical genesis and risk assessment of heavy metals in Pearl River Delta soil”(No.12120115050401);The Opening Project of Key Laboratory of Trace Science and Technology, Ministry of Public Security(No.2015FMKFKT03)

Copyright

地球科学进展 编辑部, 2017,
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Abstract

This paper analyzed contents and geochemical fractions of four heavy metals in four Quaternary boreholes from different sedimentary areas in Pearl River Delta. The results revealed that the geochemical features of heavy metals were controlled by geological provenance and sedimentary environment. The contribution rates of geological sources showed differentiation in four sedimentary environments. In delta plain sedimentary environment, geological sources were the most predominant. In the sea land interaction sedimentary environment, the control of the geological source factor was weakened. The effect of land-sea interaction became more important. Due to different chemical properties of heavy metals, they showed distinct sensitivities to sedimentary environment. Cadmium (Cd) was enriched significantly in the study areas. Mobile fraction of Cd possessed the highest proportion. Potential ecological risk of Cadmium was the highest among heavy metals. Asenic, mercury and lead were enriched weakly. Arsenic and Mercury were dominated by residual fraction. Lead was mainly composed of residual and Fe-Mn oxidation fraction. Their potential ecological risks were relatively lower. In different sedimentary environment, physicochemical parameters had various effects on Cadmium geochemical fraction such as pH. The mobile fraction of Cd was mainly correlated with pH and leaching coefficient.

Key words： Pearl River Delta; Quaternary; Provenance; Land-sea interaction; Heavy metal.

Cite this article

Zhimin Tang , Qingye Hou , Yuanhang You , Zhongfang Yang , Kuo Li . Distribution Characteristics and Influencing Factors of Heavy Metals in Pearl River Delta Quaternary Boreholes[J]. Advances in Earth Science, 2017 , 32(8) : 885 -898 . DOI: 10.11867/j.issn.1001-8166.2017.08.0885

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