Mohamad Febby Setyawan, Eli Hendrik Sanjaya, Julia Porman Tambunan, Suharti Suharti, Muntholib Muntholib
The tanning industry is one of the sources of pollutants in Indonesia. Various contaminants produced by the Tanning Industry are hazardous substances, including heavy metals. Chromium is one of the most harmful heavy metals, its hexavalent states are even more toxic than its trivalent states. Bioremediation is one way to reduce heavy metal contamination, including chromium hexavalent by using Cr-resistant bacteria. This study aims to explore Crresistant bacteria from tanning sediment waste. Screening of Cr(VI) resistant microbes was performed using LB Agar media containing Cr(VI) 50 ppm. Two isolates are coccus-shaped Gram-negative bacteria (Isolates C and B) and Gram-positive bacteria in the form of coccus (Isolate A). Isolate A can withstand Cr(VI) concentrations of up to 400 ppm and the removal efficiency of Cr(VI) up to 74% at chrome concentrations of 200 ppm. Meanwhile, C and B isolates can survive at Cr(VI) concentrations up to 300 ppm and can remove Cr(VI) up to 68% at chrome concentration of 100 ppm. © 2024 Author(s).
Department of Chemistry, Faculty of Mathematic and Natural Science, Universitas Negeri Malang, Jl. Semarang No 5, East Java, Malang, 65145, Indonesia
