Priyadi, ., . Iskandar, . Suwardi, and R. R. Mukti. “Characteristics of Heavy Metals Adsorption Cu, Pb and Cd Using Synthetics Zeolite Zsm-5”. JOURNAL OF TROPICAL SOILS, vol. 20, no. 2, Apr. 2016, pp. 77-83, doi:10.5400/jts.2015.v20i2.77-83.