Geochemical characteristics and environmental assessment of heavy metal elements in surface sediments from the offshore area of eastern Sanya

ZHANG Cong-wei; LI Liang; LONG Gen-yuan; ZHANG Kuang-hua; LI Jiang-tao

doi:10.3969/j.issn.1001-909X.2018.02.008

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Journal of Marine Sciences ›› 2018, Vol. 36 ›› Issue (2) : 55-63. DOI: 10.3969/j.issn.1001-909X.2018.02.008

Geochemical characteristics and environmental assessment of heavy metal elements in surface sediments from the offshore area of eastern Sanya

ZHANG Cong-wei, LI Liang, LONG Gen-yuan, ZHANG Kuang-hua, LI Jiang-tao

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Abstract

The geochemical characteristics and spatial distribution characteristics of 7 heavy metal elements in the surface sediments from the offshore area of eastern Sanya were studied, and the degree of pollution was assessed by using the index of geoaccumulation and the Nemerow comprehensive index methods. It is found that the content of heavy metals in the surface sediments from the offshore area of eastern Sanya are lower than the average value of elemental content in the neritic sediments of China,and the content of heavy metals conforms to the standard of Marine Sediment QualityⅠ, and the spatial distribution of the most heavy metal elements approximately follows the elemental particle-size control law. The provenances of heavy metals in this area are mainly from the terrigenous fine-grained sediments. The results of the index of geoaccumulation and the Nemerow comprehensive index methods all indicate that the heavy metals in the surface sediments of the study area are below pollution level and belong clean condition, the environment of surface sediments is fine.

Key words

surface sediment / heavy metal / index of geoaccumulation / Nemerow comprehensive index / eastern Sanya

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ZHANG Cong-wei, LI Liang, LONG Gen-yuan, ZHANG Kuang-hua, LI Jiang-tao. Geochemical characteristics and environmental assessment of heavy metal elements in surface sediments from the offshore area of eastern Sanya[J]. Journal of Marine Sciences. 2018, 36(2): 55-63 https://doi.org/10.3969/j.issn.1001-909X.2018.02.008

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