EXTRACTION OF ZINC SULFATE THAT UTILIZES IN THE MANUFACTURING OF FOOD SUPPLEMENTS BY USAGE (ZN-C) BATTERIES WASTES. J. eng. sustain. dev. [Internet]. 2021 Sep. 1 [cited 2024 May 9];25(5):67-74. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/36