STUDY OF OPTIMUM CONDITIONS FOR REMOVAL OF HEAVY METAL ELEMENTS BY LOCALLY ISOLATED FUNGI Aspergillus niger.: STUDY OF OPTIMUM CONDITIONS FOR REMOVAL OF HEAVY METAL ELEMENTS BY LOCALLY ISOLATED FUNGI Aspergillus niger. (2017). Iraqi Journal of Market Research and Consumer Protection, 9(1), 13-20. https://jmracpc.uobaghdad.edu.iq/index.php/IJMRCP/article/view/36