Skripsi
BIOREMEDIASI LOGAM BERAT TIMBAL (Pb) DAN TEMBAGA (Cu) SERTA KONVERSI ENERGI RAMAH LINGKUNGAN PADA SEDIMEN MANGROVE DARI PESISIR BANYUASIN MENGGUNAKAN MICROBIAL FUEL CELL
Coastal areas, particularly mangrove ecosystems, are highly vulnerable to the accumulation of heavy metals. On the other hand, the world is facing a global energy crisis due to dependence on non-renewable fossil fuels. This study aims to address both challenges simultaneously by utilizing the Sediment Microbial Fuel Cell (SMFC) as an ecosystem based approach capable of generating environmentally friendly energy while reducing heavy metal concentrations. The research focuses on examining the potential of electrogenic microorganisms in mangrove sediments from the Banyuasin coast, South Sumatra, to produce electricity and facilitate the bioremediation of Pb and Cu. Sampling was conducted in July 2025 at two locations, Tanjung Api-Api Port and Payung Island using sediment and water samples. The reactor employed in this study was a single chamber SMFC. The concentrations of Pb and Cu were analyzed using atomic absorption spectrometry, while data analysis involved Kolmogorov–Smirnov, Shapiro–Wilk, Kruskal–Wallis, Mann–Whitney U, and Spearman correlation tests. The results show that heavy metal concentrations in Tanjung Api-Api ranged from 20.71–21.61 mg/kg for Pb and 10.81–10.99 mg/kg for Cu, while in Payung Island the concentrations ranged from 15.03–17.63 mg/kg for Pb and 10.22–14.02 mg/kg for Cu. The SMFC reactors achieved bioremediation efficiencies of 33–54% for Pb and 41–61% for Cu, considerably higher than the control treatments, which showed efficiencies below 12%. The maximum current density and power density obtained were 305.72 mA/m² and 90.39 mW/m², respectively. Electrogenic bacterial genera such as Shewanella and Pseudomonas were detected in sediments from both study locations. Overall, this research is expected to contribute valuable scientific insights for environmental conservation and the improvement of coastal resource management through environmentally friendly biotechnological approaches
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