ARSENIC CONTENT, GRAIN SIZES AND CHEMICAL CHARACTERISTICS IN SURFACE SEDIMENTS OF THE URÍAS LAGOON, NW MEXICO

Aiming to detect possible impacts of human activities on the characteristics of the sediments of the Urias lagoon, which is a lagoonal system surrounded by the urban area of Mazatlan (NW Mexico), we determined the mean percentages of the main particle fractions, pH, CO 3 2– , organic carbon and total arsenic content in the surficial sediments of six different zones of the Urias lagoon. Sand was the dominant size fraction throughout the whole system. The highest organic matter and the lowest pH values were found in adjacent sites to industrial activities, especially to fish processing. Most arsenic concentrations were within the values of the natural local background (12.6-27.3 mg/kg), with the possible exception of sediments close to the industrial area, especially those nearby the fish processing plants, where the mean As (45.2 ± 9.3 mg/kg) exceeded the level which may have adverse effects on marine organisms (41.6 mg/kg). However, it is not excluded that such levels are results rather from the combined effect of the hydrodynamic and sediments dynamic of sediment associated to local enrichments background of the region.

• Publication year

  2019

• Venue

  Revista Internacional de Contaminación Ambiental

• Publication date

  2019-07-31

• Fields of study

  Geology, Environmental Science

• Identifiers
  DOI 10.20937/RICA.2019.35.03.20
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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