ASSESSMENT OF BIOREMEDIATION POTENTIAL OF Spirogyra porticalis and Chlorella vulgaris ON COPPER AND CHROMIUM IN TANNERY EFFLUENT FROM CHALLAWA INDUSTRIAL AREA, KANO STATE. FJS [Internet]. 2021 Nov. 2 [cited 2025 Sep. 17];5(3):29-35. Available from: http://162.254.38.185/index.php/fjs/article/view/739