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All Journal JURNAL TEKNOLOGI LINGKUNGAN Microbiology Indonesia Jurnal Ecolab Jurnal Rekayasa Lingkungan
Nida Sopiah
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Medicine & Pharmacology

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Journal : Microbiology Indonesia

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Heavy Metals Biosorption by Copper Resistant Bacteria of Acinetobacter sp. IrC2 WAHYU IRAWATI; ADOLF JN PARHUSIP; NIDA SOPIAH
Microbiology Indonesia Vol. 9 No. 4 (2015): December 2015
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2817.263 KB) | DOI: 10.5454/mi.9.4.4

Abstract

 Heavy metal pollution is a serious problem because it cannot be degraded by natural processes and persist in soil, water, and sediment. Many indigenous microorganisms isolated from heavy metal contaminated sites had tolerance to heavy metals toxicity and could be used for bioremediation agent because of its capability to biosorb heavy metals. The aim of this research was to study the potency of copper resistant bacteria Acinetobacter sp. IrC2 as a biosorbent of heavy metals. Biosorption was determined by measuring the heavy metals concentration on growing medium by using atomic absorption spectrophotometer. The research showed that Acinetobacter sp. IrC2 was capable of growing in medium containing each of 2 mM of copper, zinc, lead, cadmium, and the mixture of those heavy metals. The addition of copper and lead in the medium changed morphological appearance of colonies to green and brown, respectively, suggesting that the survival mechanism of the isolate was by biosorbing copper or lead inside the cells. The percentage of heavy metals biosorption efficiency using live cells of Acinetobacter sp.IrC2 were up to 64.31% of copper, 24.73% of zinc, 62.79% of lead, and 11.56% of cadmium. Acinetobacter sp. IrC2 also reduced copper, lead, and cadmium concentration up to 24.30, 75.93, and 16.38%, respectively, in medium supplemented with 1 mM of the mixture of these heavy metals. The findings of this study indicated that Acinetobacter sp. IrC2 was a promising bacterium for removal of heavy metals.
Co-Authors A.A. Ketut Agung Cahyawan W Adi Mulyanto Aviantara, Dwindrata Aviantara, Dwindrata Basuki Hernaningsih, Arie La Ode Sumarlin Mrs Nurhasni Mulyono Mulyono Oktaviani, Avi Prasetyo, Djoko Reba Anindyajati Pratama, Reba Anindyajati S Hermanto Sehabudin, Sindi Sitomurni, Amita Suciati, Fuji Susi Sulistia Susi Sulistia, Susi Titin Handayani Ummu Hanifah WAHYU IRAWATI Zakki R Mubarok