Pembuatan Karbon Aktif dari Kulit Singkong (Manihot Utilissima) untuk Penurunan Kadar Logam Besi (Fe) pada Air Sumur Bor

Abstract

Borehole water in some areas often contains iron metal (Fe) that exceeds the threshold set by Permenkes No. 2 Year 2023, which is 0.2 mg/L. Excess iron content can reduce water quality and cause health problems. This study aims to reduce Fe metal levels using activated carbon from cassava peel (Manihot esculenta) and determine the characteristics of activated carbon crystallinity through X-Ray Diffraction (XRD) tests. Cassava peels were dehydrated through drying and oven, carbonized at 400°C and chemically activated using 30% NaOH solution. The adsorption process was carried out for 90 minutes with adsorbent mass variations of 1; 2; and 3 g in 100 mL of solution. The initial Fe level was 8.78 mg/L. After adsorption, the Fe concentration decreased to 6.99 mg/L (20.39% efficiency) at 1 g; 5.5 mg/L (37.36%) at 2 g; and 7.51 mg/L (14.36%) at 3 g. The XRD test results showed the amorphous structure of the adsorbent. XRD test results showed an amorphous structure with a dominant peak of carbon 2θ = 23.94˚ in the [002] plane and a weak peak 2θ = 44.6˚ in the [100] plane. Activated carbon from cassava peel has the potential as an alternative adsorbent, but Fe levels have not met the drinking water quality standards set.