Volume 14, Issue 3 (Autmn 2024)
J. Aqua. Eco 2024, 14(3): 59-68 |
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Enayati M, Dehghani Ghanatghestani M, Parvaresh H, Kamrani E, Hamzei S. Investigating the self-purification power of the sea in removing nutrients (case study: Bandar Abbas beaches). J. Aqua. Eco 2024; 14 (3) :59-68
URL: http://jae.hormozgan.ac.ir/article-1-1101-en.html
URL: http://jae.hormozgan.ac.ir/article-1-1101-en.html
Maryam Enayati 
, Mohsen Dehghani Ghanatghestani * , Hossein Parvaresh , Ehsan Kamrani , Samad Hamzei
, Mohsen Dehghani Ghanatghestani * , Hossein Parvaresh , Ehsan Kamrani , Samad Hamzei
Abstract: (702 Views)
The influx of nutrients into the waters of the Persian Gulf is a significant environmental issue. The discharge of urban and industrial wastewater, as well as runoff from shrimp farming ponds, contributes to pollution in the region. However, the sea also has the capacity for self-purification. This study investigates the concentrations of nitrate, nitrite, and phosphate nutrients, and their variation from the coast to the inner sea in Bandar Abbas, while also assessing the Gulf's self-purification ability in removing these pollutants. Five stations were selected along the shores of Bandar Abbas, focusing on key sources of sewage entering the sea. A transect was placed perpendicular to the coast at each station, with samples collected from the point of sewage discharge, 1500 meters, and 5000 meters offshore. Three seawater samples were taken from each point and analyzed for nitrate, phosphate, nitrite, and physicochemical parameters. The results showed phosphate concentrations ranging from 0.0096 to 0.1450 μg/liter, nitrate from 0.01 to 0.577 μg/liter, and nitrite from 0.0002 to 0.0887 μg/liter. The nitrate and nitrite levels were found to be below the pollution standard, indicating the sea's natural ability to self-purify these pollutants. However, phosphate levels at some stations exceeded the standard, with the highest concentration found at station 4 (Goorsoozan Creek), where untreated urban sewage enters Bandar Abbas. Comparing nutrient levels across the stations revealed significant differences, which can be attributed to varying pollution sources and nutrient input in different regions
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This work is licensed under a Creative Commons — Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)