The　growth　of　heavy　metals　in　wastewater　is　a　widespread　concern　that　affects　thousands　of　lives　and　spread　diseases　worldwide.　Its　extraction　is　subject　of　concert　from　last　few　decades.　Looking　forward　in　the　current　study,　Citrus　Limon　leaves　were　used　as　an　adsorbent　for　the　Biosorption　of　Co(II)　and　Cr(III)　in　a　batch　system.　Citrus　Limon　leaves　were　brought　from　the　local　garden　of　Amakhel,　Tank,　Pakistan.　The　removal　process　of　Co(II)　and　Cr(III)　was　examined　under　different　conditions　of　pH,　contact　time,　and　initial　concentration　to　get　the　optimum　condition.　It　was　found　optimum　contact　time　for　Co(II)　and　Cr(II)　was　20　and　10　minutes.　By　the　increase　of　concentration　of　adsorbate,　the　value　of　qe　was　investigated　for　Co(II)　and　Cr(III)　at　20oC.　The　optimum　initial　concentration　for　Cr(III)　and　Co(II)　was　60　ppm　and　40　ppm,　respectively.　The　optimum　shaking　power　for　Cr(III)　and　Co(II)　was　found　to　be　150　rpm　and　120　rpm,　respectively.　©　2020　by　the　authors.