Nezha MEJJAD

Geochemical, radiometric, and environmental approaches for the assessment of the intensity and chronology of metal conta...

Published in Environmental Science and Pollution Research

The present study evaluates the distribution of metals over the last 100 years in the Oualidia lagoon by examining their concentrations in the sediment cores. The samples were analyzed by instrumental neutron activation analysis and inductively coupled plasma mass spectrometry. Activities of 210Pb, 226Ra, and 137Cs were determined by gamma-ray spec...

Evidence of change in 210Pb atmospheric flux in the Oualidia lagoon inferred from sediment radiometric dating

Radiometric dating was carried out on sediment cores from the Oualidia Lagoon located in the north-western of Morocco. The objective of this study was to investigate recent environmental changes in this area, particularly the variation of 210Pb atmospheric flux. Two sediment cores, Core-1 and Core-2, were collected from El Oualidia Lagoon lying in ...

Sediment geochronology and geochemical behavior of major and rare earth elements in the Oualidia Lagoon in the western M...

Published in Journal of Radioanalytical and Nuclear Chemistry

Naturally occurring radionuclides and 137Cs were measured in a sediment core and surface deposit collected from the bed channel of the Oualidia Lagoon located in the western Morocco. Major and rare earth elements (REE) profiles were determined by instrumental NAA technique. 210Pb and 137Cs were used to establish the sedimentation chronology over th...