Study of mercury concentration in Khur-e-Moosa (petrochemical and Jaafari stations, Bandar-e-Imam)
2019
Sedigheh Aghabaki Aloo ghareh | Sedigheh Bataleb-Looie | Kamran Gerayesh
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.
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