STUDI ADSORPSI-REDUKSI Au(III) OLEH ASAM HUMAT DENGAN ADANYA Fe(III), Zn(II) DAN Pb(II) by , ALFONS ADRIANUS T., , Sri Sudiono, S.Si, M.Si

“…Humic acid was isolated from peat soil from Rawa Pening, Ambarawa, Central Java with NaOH 0.1 M, then precipitated with HCl 0.1 M and purified with 0.1 M HCl/0.3 M HF 1:1 (v/v). …”