Telah dilakukan penentuan kadar tembaga (Cu) dalam batuan mineral. Batuan mineral ini dianalisis kandungan tembaga (Cu didalamnya menggunakan instrumen Flame Atomic Absorption Spectrophotometry (FAAS). Sampel dilakukan preparasi dengan metode destruksi basah menggunakan larutan HNO3 pekat. Dalam analisis kadar tembaga (Cu), dibuat kurva standar untuk mengetahui hubungan antara konsentrasi larutan dengan nilai absorbansi sehingga konsentrasi sampel dapat ditentukan. Larutan standar 2 ppm, 4 ppm, 6 ppm, 8 ppm, dan 10 ppm dibuat dengan metode pengenceran bertingkat larutan stock yang dibuat dari padatan Cu(NO3)2.3H2O. Regresi kurva kalibrasi yang didapat sebesar 0,9995. Berdasarkan hasil perhitungan, diperoleh kadar Cu dalam sampel batuan sebesar 2,189 ppm atau 21,66%.

UiO-66, as one of the metal-organic framework (MOF) compounds, has been used to treat some anionic and cationic dye waste. In order to determine the adsorption selectivity decisively, the synthesis of UiO-66 and UiO-66 modulated with acetic acid had been carried out, along with their adsorption tests for Eriochrome Black T (EBT) dye solution. The synthesis was performed by utilizing a solvothermal method with the reaction mixtures of zirconium (IV) chloride (ZrCl4) and terephthalic acid (H2BDC) as a ligand heated at 120 oC for 24 hours. Both UiO-66 (without acetic acid) and acetic acid modulated UiO-66 were obtained as a white powder. Acetic acid as a modulator was added and being investigated for the adsorption capability compared to the normal UiO-66. This study showed that normal UiO-66 exhibited better adsorption than acetic acid modulated UiO-66 with a mmol ratio of acetic acid:ligand varied from 50:1, 100:1, and 150:1. Acetic acid modulated UiO-66 with a mmol ratio of 50 exhibited the best crystallinity as observed by using x-ray diffraction. It can be concluded that the adsorption of EBT using normal and acetic acid modulated UiO-66 obeyed the pseudo-second-order reaction rate law as well as the Langmuir adsorption isotherm pattern.