Firincă Cristina, Zamfir Lucian-Gabriel, Constantin Mariana, Răut Iuliana, Capră Luiza, Popa Diana, Jinga Maria-Lorena, Baroi Anda Maria, Fierăscu Radu Claudiu, Corneli Nicoleta Olguța, Postolache Carmen, Doni Mihaela, Gurban Ana-Maria, Jecu Luiza, Șesan Tatiana Eugenia
Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry-ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania.
Department of Botany and Microbiology, Faculty of Biology, University of Bucharest, 91-95 Spl. Independenței, 050095 Bucharest, Romania.
J Xenobiot. 2023 Dec 29;14(1):51-78. doi: 10.3390/jox14010004.
Contamination of soil with heavy metals has become a matter of global importance due to its impact on agriculture, environmental integrity, and therefore human health and safety. Several microbial strains isolated from soil contaminated by long-term chemical and petrochemical activities were found to manifest various levels of tolerance to Cr, Pb, and Zn, out of which and exhibited above-moderate tolerance. The concentrations of target heavy metals before and after bioremediation were determined using electrochemical screen-printed electrodes (SPE) modified with different nanomaterials. The morpho-structural SEM/EDX analyses confirmed the presence of metal ions on the surface of the cell, with metal uptake being mediated by biosorption with hydroxyl, carboxyl, and amino groups as per FTIR observations. was observed to pose a higher bioremediation potential compared to , removing 87% of Cr and 67% of Zn, respectively. Conversely, removed 86% of Pb from the solution, compared to 48% by . Therefore, the fungal strain could represent a viable option for Cr and Zn bioremediation strategies, whereas the bacterial strain may be used in Pb bioremediation applications.
土壤重金属污染因其对农业、环境完整性以及人类健康与安全的影响，已成为一个具有全球重要性的问题。从长期受化学和石化活动污染的土壤中分离出的几种微生物菌株，被发现对铬、铅和锌表现出不同程度的耐受性，其中[具体菌株1]和[具体菌株2]表现出高于中等水平的耐受性。使用用不同纳米材料修饰的电化学丝网印刷电极（SPE）测定生物修复前后目标重金属的浓度。形态结构扫描电子显微镜/能谱分析（SEM/EDX）证实细胞表面存在金属离子，根据傅里叶变换红外光谱（FTIR）观察结果，金属吸收是通过与羟基、羧基和氨基的生物吸附介导的。与[具体菌株2]相比，观察到[具体菌株1]具有更高的生物修复潜力，分别去除了87%的铬和67%的锌。相反，[具体菌株2]从溶液中去除了86%的铅，而[具体菌株1]为48%。因此，真菌菌株[具体菌株1]可能是铬和锌生物修复策略的一个可行选择，而细菌菌株[具体菌株2]可用于铅生物修复应用。
