Aththanayake A M K C B, Rathnayake I V N, Deeyamulla M P, Megharaj Mallavarapu
Department of Microbiology, Faculty of Science, University of Kelaniya, Kelaniya, 11600, Sri Lanka.
Department of Chemistry, Faculty of Science, University of Kelaniya, Kelaniya, 11600, Sri Lanka.
World J Microbiol Biotechnol. 2023 Apr 28;39(7):173. doi: 10.1007/s11274-023-03614-3.
Deteriorating the quality of different parts of the ecosystem due to toxic metals is a serious global issue. Hexavalent chromium is a metal that can cause adverse effects on all living beings, including plants, animals, and microorganisms, on exposure to high concentrations for prolonged periods. Removing hexavalent chromium from various types of wastes is challenging; hence the present study investigated the use of bacteria incorporated with selected natural substrates in removing hexavalent chromium from water. Isolated Staphylococcus edaphicus KCB02A11 has shown higher removal efficiency with a wide hexavalent chromium range (0.025-8.5 mg/L) within 96 h. Incorporating the isolated strain with natural substrates commonly found in the environment (hay and wood husk) showed high removal potential [100% removal with 8.5 mg/L of Cr(VI)], even within less than 72 h, with the formation of biofilms on the used substrates applied for metal removal on a large scale for prolonged periods. This study is the first report investigating hexavalent chromium tolerance and removal by Staphylococcus edaphicus KCB02A11.
由于有毒金属导致生态系统不同部分质量恶化是一个严重的全球问题。六价铬是一种金属，长时间暴露于高浓度时会对所有生物，包括植物、动物和微生物产生不利影响。从各类废物中去除六价铬具有挑战性；因此，本研究调查了结合选定天然底物的细菌在从水中去除六价铬方面的应用。分离出的土壤葡萄球菌KCB02A11在96小时内对较宽的六价铬范围（0.025 - 8.5毫克/升）显示出较高的去除效率。将分离出的菌株与环境中常见的天然底物（干草和木糠）结合，即使在不到72小时内，也显示出很高的去除潜力[对于8.5毫克/升的Cr(VI)去除率达100%]，并且在用于大规模长期金属去除的所用底物上形成了生物膜。本研究是关于土壤葡萄球菌KCB02A11对六价铬耐受性和去除的首次报告。
