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Sahara, Emmy, Ni Putu Widyana Kartini, & James Sibarani.
" PEMANFAATAN ARANG AKTIF DARI LIMBAH TANAMAN GUMITIR (Tagetes erecta) TERAKTIVASI ASAM FOSFAT SEBAGAI ADSORBEN ION Pb2+ DAN Cu2+ DALAM LARUTAN." <em>CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry)</em> [Online], 5.2 (2017): 67 - 74. Web. 29 Aug. 2026