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Geoscience ›› 2021, Vol. 35 ›› Issue (01): 293-300.DOI: 10.19657/j.geoscience.1000-8527.2021.01.29

• Ore Deposits and Geochemistry • Previous Articles    

Distribution Characteristics and Influencing Factors of Soil Cu in Jieyang City, Guangdong Province

HUANG Changchen1,2(), WEN Hanhui3, CAI Limei1,2,4(), LUO Jie1, JIANG Huihao1,2   

  1. 1. Key Laboratory of Exploration Technologies for Oil and Gas Resources (Yangtze University), Ministry of Education, Yangtze University,Wuhan, Hubei 430100,China
    2. College of Resources and Environment, Yangtze University, Wuhan, Hubei 430100, China
    3. Team 940 of Geological Bureau for Nonferrous Metals of Guangdong Province, Qingyuan, Guangdong 511500, China
    4. Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510640, China
  • Received:2020-03-05 Revised:2020-06-06 Online:2021-02-12 Published:2021-03-12
  • Contact: CAI Limei

Abstract:

Taking soil collected from Jieyang, Guangdong, China as the study object, the Cu content of 1,330 surface soil samples (0-20 cm) and 331 deep soil samples (150-200 cm) were measured, and the distribution characteristics and influencing factors of soil Cu were studied accordingly. The enrichment factor, GIS spatial analysis and variance analysis were used to comprehensively analyse the enrichment characteristics, spatial distribution characteristics and influencing factors of soil Cu in the study area, and the risk of soil Cu pollution was evaluated according to national standards. The results showed that the average Cu content of surface soil was 9.49 mg/kg, which was far lower than the Cu risk screening value (50 mg/kg) in the “Soil Environmental Quality Risk Control Standard for Farmland Soils (Trial) (GB15618-2018)”. The enrichment degree of copper in surface soil was at the level of non-enrichment and slight enrichment, and there was no obvious copper enrichment. The high value areas of copper in surface soil were mainly distributed in the central Rongcheng district, southeast Jiexi County, and west and north Huilai County. Soil parent material and land use pattern were the main influencing factors of copper content in the surface soil of the study area, and soil type also had certain influence on it. In different parent materials, the Cu content in the Quaternary sediments was the highest; Under different land use types, the Cu content of construction land was significantly higher than other land use types; In different soil types, the Cu content in paddy soil was the highest.

Key words: Jieyang City, soil Cu, distribution characteristic, influencing factor

CLC Number: