Environmental Science Department, Faculty of Science, Port Said University, Port Said, Egypt.
Egyptian Propylene and Polypropylene Company (EPPC), Port Said, Egypt.
Environ Sci Pollut Res Int. 2023 Feb;30(6):15198-15216. doi: 10.1007/s11356-022-23241-z. Epub 2022 Sep 27.
The existence of toxic heavy metals in the aquatic environment has emphasized a considerable exigency to develop several multifunctional biosorbents for their removal. Herein, three individual bacterial species of Cellulosimicrobium cellulans, Bacillus coagulans, and Microbacterium testaceum were successfully isolated from low-level liquid radioactive wastes. Their loading capacities towards cerium and cobalt metal ions were inclusivity inspected under variable operational parameters of pH, primary pollutant concentration, interaction time, temperature, stirring speed, and biosorbent dosage. By analyzing the influence of solution pH, concentration, temperature, biosorbent mass, and agitation speed on the biosorption kinetics, the biosorption process confirms pseudo-second-order kinetic, intraparticle diffusion, and Elovich equation. Remarkably, the isolated Microbacterium testaceum exhibited high loading capacities reaching 68.1 mg g, and 49.6 mg g towards Ce(III), and Co(II) ions, respectively, at the initial concentration of 2.8 mM, pH 4.5, and 25 °C. Overall, the isolated bacterial species can potentially be offered up as a promising scavenger for Ce(III) and Co(II) from liquid waste effluents.
水生环境中有毒重金属的存在强调了开发多种多功能生物吸附剂以去除这些重金属的迫切需求。本文从低水平液体放射性废物中成功分离出三种单独的细菌，即纤维单胞菌（Cellulosimicrobium cellulans）、凝结芽孢杆菌（Bacillus coagulans）和微杆菌（Microbacterium testaceum）。在不同的操作参数（pH 值、初始污染物浓度、相互作用时间、温度、搅拌速度和生物吸附剂用量）下，检查了它们对铈和钴金属离子的负载能力。通过分析溶液 pH 值、浓度、温度、生物吸附剂质量和搅拌速度对吸附动力学的影响，吸附过程符合准二级动力学、内扩散和 Elovich 方程。值得注意的是，分离出的微杆菌对 Ce(III)和 Co(II)离子的负载能力分别高达 68.1 mg g 和 49.6 mg g，初始浓度为 2.8 mM、pH 值为 4.5 和 25°C。总体而言，分离出的细菌种类有望成为从液体废物中去除 Ce(III)和 Co(II)的有前途的清除剂。
