Pengaruh Tinggi Unggun terhadap Kinerja Kolom dalam Proses Biosorpsi Ion Merkuri (Hg) Menggunakan Kolom Fixed Bed

Abstract

The high and toxic content of mercury in water can cause negative effects for animals, plants and humans. Biosorption using a fixed bed column is a process in which heavy metal ions are bound in solution using solids of natural origin (biosorbent). Currently, a large amount of fiber waste produced from the coconut industry is still not optimally utilized. Naturally, coconut fiber will provide a porous structure, so it can be used as a bioadsorbent without burning. The purpose of this study was to determine the effect of variations in bed height on the kinetic performance of the biosorption column in the absorption of mercury. This research was conducted by immersing the biosorbent with NaOH and without immersion. Variations in the height of the beds used were 10, 20 and 30 cm. The result of the Fourier-Transformer Infrared (FTIR) analysis is that the biosorbent by immersion has larger pores. And the Scanning Electron Microscope - Energy Dispersive Spectroscopy (SEM-EDS) analysis showed that the biosorbent by immersion had new elements, namely Si and Na. The concentration of effluent Hg using biosorbent by immersion with bed heights of 10, 20 and 30 cm was 5.815 mg/L, 3.097 mg/L, and 3.65 mg/L, respectively. Meanwhile, the biosorbent without immersion was 13.677 mg/L, 22.966 mg/L, and 0.715 mg/L, respectively. In the adsorption column, the highest linear regression coefficient was in the biosorption using a biosorbent with NaOH with a bed height of 30 cm on the Yoon-Nelson model to get an R2 = 0.953 value.