State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China; Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India; Laboratorio de Nanocelulosa y Biomateriales, Departamento de Ingeniería Química, Biotecnología y Materiales, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Avenida Beauchef 851, Santiago, Chile.
Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India.
Chemosphere. 2022 Dec;308(Pt 1):136270. doi: 10.1016/j.chemosphere.2022.136270. Epub 2022 Aug 31.
Recent years, metal pollution is an alarming factor to know about protects the environmental ecosystem due to the toxic, persistent and abundant in nature. Metals are present everywhere in the biotic and abiotic samples including soil, water, and microbes. The rate of bioaccumulation and biotransformation are very high. The excess concentration of the metals causes heavy metal pollution or contamination. Due to these defects, the removal of metals using biological sources is heightened in the current research. In this current investigation, the biosorption potential ability of the metal tolerable Bacillus cereus on Pb and Cu rich environment was chosen and thoroughly monitored. The 16s rRNA of the Bacillus cereus was sequenced, and named as Bacillus cereus RMN 1 (MK521259). The various test concentration (10-60 mg/mL) of Pb and Cu was exhibited the maximum removal percentages of 85.2% and 60.2%. The result of bisorption factors exhibited, 300 mg/mL of the biosorbent potency, 60 min contact time and pH 7, and they found to be optimal to remove the maximum of Pb ion from the solution. In the regression coefficients, the Freundlich and Langmuir isotherm models were used to study the adsorption kinetics of metal ions. In addition, the isotherm model confirmed that the of B. cereus biomass medicated metal adsorption was more favourable reaction for metal degradation. With the above evidences, the results of the present investigation proved that B. cereus derived biomass was actively adsorbing the metals ions. Thus we are recommending for the implementation of effective waste water treatment.
近年来，由于金属具有毒性、持久性和丰富性，因此是了解保护生态环境的一个令人担忧的因素。金属广泛存在于生物和非生物样本中，包括土壤、水和微生物。生物积累和生物转化的速度非常高。金属的浓度过高会导致重金属污染或污染。由于这些缺陷，目前的研究强调了使用生物来源去除金属。在当前的研究中，选择并彻底监测了能够耐受金属的蜡样芽孢杆菌对富含 Pb 和 Cu 的环境的生物吸附潜力。对蜡样芽孢杆菌的 16s rRNA 进行了测序，并将其命名为 Bacillus cereus RMN 1 (MK521259)。在各种测试浓度（10-60 mg/mL）的 Pb 和 Cu 下，最大去除率分别为 85.2%和 60.2%。吸附因子的结果表明，300 mg/mL 的生物吸附剂效力、60 min 的接触时间和 pH 7 被发现是从溶液中去除最大量 Pb 离子的最佳条件。在回归系数中，使用 Freundlich 和 Langmuir 等温模型研究了金属离子的吸附动力学。此外，等温模型证实了 B. cereus 生物质介导的金属吸附是更有利于金属降解的反应。有了这些证据，本研究的结果证明了 B. cereus 衍生的生物质能够主动吸附金属离子。因此，我们建议实施有效的废水处理。
