Wiyantoko, Bayu, Puji Kurniawati, and Tri Esti Purbaningtias. 2014. “Adsorption Isotherm of Cr(VI) Using Mg/Al Hydrotalcite With Molar Ratio 2:1”. EKSAKTA: Journal of Sciences and Data Analysis 14 (1):20-26. https://journal.uii.ac.id/Eksakta/article/view/5969.