Modified Natural Silica Dimethylamine for Optimization of Sulfate Ion Absorption Using the Batch Method

Sulfates are compounds that are often used in various industrial activities. Sulfate wastes with high concentrations can cause an imbalance in the natural sulfur cycle which causes the leaching of toxic sulfides which leads to environmental damage. Adsorption is an effective way of dealing with waste. Silica is an adsorbent that is often used for the adsorption process. on DMA-modified silica. Characterized by using infrared spectra, microscope scanner and adsorption of sulfate solutions with various concentrations and contact times. The results showed that the use of modified DMA silica had better absorption than activated silica seen from the frendulich isotherm pattern with a regression coefficient R² = 1. Absorption capacity at 60 minutes was 0.82754 mg/g⁻¹. (paper)