Nateghe Moravej, Abolfazl Naji,
Volume 7, Issue 2 (10-2017)
Abstract
Mercury (T-Hg), as the most toxic Trace metal, can have adverse effects on the environment. In this study, the concentrations of T-Hg were investigated in surface sediments of higher and lower tidal zones of Hormozgan province coasts including the stations of Shahr Jask, Ariyan International Wetland Lagoon, Khorgorsuzan Bandar Abbas, Bostono Industrial Zone, Coastal Park of Khumir, Shahrbonderlangeh, Bandarreqam, Bostaneh Harbor in summer 2017. T-Hg concentration was measured by Ftomic Atomic Aabsorption Spectrometry (FAAS, GTA120). From 16 stations in the higher and lower tidal zones, the stations of Khorgorsuzan Station and Azzin kinetic showed the lowest concentration of T-Hg. Based on accumulation index (Igeo), the geochemistry of the Igeo studied areas had a moderate to high contamination. Enrichment Factor (EF) showed a strong to extremely high enrichment. Regarding SQGS, all stations were higher than Effect Range Low (ERL) value. These findings raise awareness of the contamination status of surface sediments in coastal zone of Hormozgan Province, provide a valuable benchmark for future comparisons in the area, and are important for the design of appropriate policies and long-term management of those ecosystems by local managers and the national authorities.
Sedigheh Aghabaki Aloo Ghareh, Sedigheh Bataleb-Looie, , Kamran Gerayesh,
Volume 9, Issue 3 (12-2019)
Abstract
In the present study, mercury pollution was studied in Petrochemical and Ja’fari, known as the most important tributaries of Khur-e Moosa. Twenty-seven samples of sediments were taken in the spring of 2016. Along with total mercury analysis, mobility, bioavailability, and risk evaluation were analyzed by the Community Bureau of Reference (BCR) method. The results showed that the level of THg in the sediment samples ranged from 2.19 to 45.71µg g-1. The data clearly showed the highest levels of total mercury in sample s9-1 whereas all samples showed higher levels of total mercury than the standard of 1 µg g-1. The sequential extraction procedure showed that 10.5 percent of Hg is concentrated in the exchangeable phase, while the major part is concentrated within the last or residual phase. This proves that most of the mercury is not exchanged under alkaline (physiochemical) conditions, and is not bioavailable. But mercury concentrated in the exchangeable phase can be easily absorbed and desorbed. The calculated mobility factor of Hg increased when getting closer to the waste disposal sites of the chloralkaline factory.
