Addressing the Environmental Concerns: Statistical Approach for Mg2+ and Mn2+ Mitigation in Water System Sustainability in Indonesia

This research aimed to determine the most effective adsorbent for reducing Mg²⁺ and Mn²⁺ levels in residential water near the oil and gas industry in the Tambun area, Bekasi, Indonesia. Bentonite was tested with varying temperature conditions. The study further compared activated charcoal and bentonite as potential adsorbents, examining their efficacy under different contact times (10, 20, and 30 minutes). Thus, sampling followed the SNI 6989.57:2008 method for surface water sampling, with bentonite conditioning and activation as initial steps. Next, the adsorption experiments utilized a separating funnel, varying the contact time between adsorbent and sample. Hence, the filtrates were analyzed quantitatively for Mn2+ using atomic absorption spectroscopy and for Mg²⁺ through complexometric titration.