Volume36, Issue 1, 2021
Analytical study and application of new chelating polymers for removal of heavy metals from wastewater sample.
R.T. Shibli, T.E. Jassim
Mesopotamian Journal of Marine Science 2021, Volume 36, Issue 1, Pages 1-14
This study includes the preparation of new Schiff-base derived from (3-amino phenol) and (2-hydroxy benzaldehyde and (2-hydroxy-3-methoxy benzaldehyde), the characterization of this bases is carried out by FT-IR and 1H-NMR The prepared bases were loaded on Urethane foam to prepare chelating polymers which were characterized by FT-IR, TGA and DSC technique. The loading efficiency of these resins were investigated toward several ions Cu+2, Cd+2, Ni+2 and pb+2 in different time and pH by Batch method. The prepared chelating polymers showed a good efficiency towards the studied ions and it was maximum for (Cu+2) ions, An application to prepared chelating polymers was carried out on a sample of wastewater of Hamdan´s station in Basrah South of Iraq, and the results showed high and accurate level efficiency to remove the heavy elements.
Aspects of the reproductive cycle of the prawn Macrobrachium nipponense (De Haan, 1849) from Al-Hammar Marsh, Southern Iraq.
A.T. Abbas, A.H. Ghazi, S.S. Hassan
Mesopotamian Journal of Marine Science 2021, Volume 36, Issue 1, Pages 15-26
The reproductive cycle of the Macrobrachium nipponense (De Haan, 1849) was studied in Al-Hammar Marsh, Southern Iraq during Dec. 2015 to Nov. 2016.The averages of total length, carapace length and weight for males were 65.7 mm, 28.8 mm and 2.9 g respectively, and for ovigerous females were 60.1 mm, 26.0 mm and 3.3 g respectively. Length-weight relationship of M. nipponense was W= 0.407 L e 0.031 (r = 0.67) for the females and W= 0.177 L e 0.043 (r = 0.90) for the males. The highest percentage of ovigerous females was 98.88 % attained in August. The maximum gonado somatic index was recorded in March (10.66) and the minimum was 5.72 recorded in July 2016. The condition factor for the males was ranging from 1.30 to 2.90 in November and August, respectively, while for the females it was between 1.11 and 2.10 at the same periods. Total number of eggs per female was from 799 to 2047 egg/ind. Minimum sex ratio (males: females) was 1:0.17 recorded in February, and the maximum 1:9.00 was recorded in June.
Copyright © 2021 - All Rights Reserved - Design by: (Assistant Lecturer, wissam zaki)