Assessment of Mercury Load in River Ravi, Urban Sewage Streams of Lahore Pakistan and its impact on the oxidative stress of exposed fish

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Research Paper 01/04/2016
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Assessment of Mercury Load in River Ravi, Urban Sewage Streams of Lahore Pakistan and its impact on the oxidative stress of exposed fish

Abdul Hamid, Muhammad Usman Khan, Junaid Yaqoob, Ali Umar, Amjad Ali, Abdul Rehman, Safdar Javed, Adnan Sohail, Abida Anwar, Muhammad Saleem Khan
J. Bio. Env. Sci.8( 4), 63-72, April 2016.
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The purpose of the present work was Mercury determination in river Ravi, different nalas from Lahore, Head Balloki water and their sediments located in Punjab Pakistan in the summer and winter seasons. Tekran-2500 cold vapor atomic fluorescence spectrometer employed for determination of Hg in water samples and Zeeman mercury analyzer for sediments. The results show highest Hg concentration in Hudiara drain at all three sampling areas in the summer season. Mehmood Booti nala showed high concentration at terminal point before entering into river water with 84.6±28.11 ng/l concentration. Water at Head Balloki showed 67.3±14.51ng/L concentration in the side running water. The river water sampling before the studied point also showed 1.2±0.4 ng/l concentration. Bhek Nala and Farrukhabad Nala showed relatively less concentration of mercury compared to other nalas. The mercury level was found highest in the sediments of Hudiara drain in both seasons. The high concentration in water tends to accumulates in the different organs of the aquatic organisms. in the current study of Tilapia and Labeo rohita shows the order of the concentration from higher to lower was kidney, liver, gills and muscle where in case of tilapia the accumulation order in slightly different starting from gills, kidney, liver and muscle respectively. The level of CAT was decreased in response high concnetration. Mercury treatment stimulated the liver and gill tissue to significantly increase the level of SOD which might be due to synthesis of SOD and addition in the pre-existing SOD level. The MDA level of gills and liver tissue was increased with the increase in the concentration.


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