Prakoso, N.I. 2018. Application of Lignin as Adsorbent for Silver (Ag) and Copper (Cu) on Electroplating Waste in Kota Gede. INDONESIAN JOURNAL OF CHEMICAL RESEARCH. 4, 1 (Jan. 2018), 1–7. DOI:https://doi.org/10.20885/ijcr.vol3.iss1.art1.