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vol-35MAJOR CATIONS LEVELS STUDIES IN SURFACE COASTAL
WATERS OF DERNA CITY, (LIBYA)
HAMAD .M.I. HASAN* AND AHMED M. ABDEL-HALIM**
*Chemistry Department, Faculty of Science, Omar El-Mokthar University, El-Bieda, Libya
**National Institute of Oceanography and Fisheries, Alexandria, Egypt.
[email protected]
[email protected]
Keywords: Major Cations – Chlorinity ratio – Mediterranean – Derna – Libya
ABSTRACT
Sodium, potassium, calcium and magnesium concentrations and their
Chlorinity ratios were measured in the coastal surface waters of Derna City
(Libya).Eight stations were sampled during autumn (2006) and winter (2007) from
surface water .It was found that increasing in the content of these cations during
autumn. The low levels were recorded at the near shore stations comparing with
the off share ones. The results gave indication that the content and amount of
discharged water largely affect the chemical composition of the coastal surface
water. The major cation / chlorinity ratio was calculated for the studied area which
consists with the fact that the area affected directly with some sources of
pollutions. Different statistical treatments were carried out to calculate the
correlation coefficients between the major cations.
