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首页> 外文期刊>Journal of Environmental Science and Health >Metal removal and morphological changes of B. megaterium in the presence of a spent catalyst
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Metal removal and morphological changes of B. megaterium in the presence of a spent catalyst

机译：废催化剂存在下巨大芽孢杆菌的金属去除和形态变化

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Spent catalysts represent an environmental concern, mainly due to their elevated metal content. Although conventional treatment methods for spent catalysts are available, they generate large volumes of potentially harmful wastes and gaseous emissions. To overcome the environmental impact, biotechnological approaches are currently being explored and developed. Thus, the current study assayed the capability of Bacillus megaterium strain MNSH1-9K-1 to remove Al, Ni, V and Ti contained in the spent catalyst coded as ECAT-TL-II. To this end, B. megaterium MNSH1-9K-1 growth and metal uptake abilities in the presence of ECAT-TL-II spent catalyst at 15% (wt/vol) pulp density were evaluated in modified Starkey medium at 37 degrees C and 200rpm. The results presented here show B. megaterium resistance capability to the high-metal content residue, and its Al, V and Ni removal ability, in 1,059.15 +/- 197.28mgkg(-1) of Al, 43.39 +/- 24.13mgkg(-1) of V and 0.58 +/- 0.00mgkg(-1) of Ni, corresponding to the 0.79%, 1.63% and 0.46% of each metal content, respectively, while no Ti removal was detected. Besides, it was observed that the sporulation process took place in B. megaterium cells in the presence of the spent catalyst. The results shown in this study suggest the potential of the strain MNSH1-9K-1 for the removal of metals contained in high-metal content residues, contributing also to the knowledge of the metal resistance and removal abilities of B. megaterium in the presence of a spent catalyst, and how morphological cell changes may be occurring while metal removal is taking place.
机译：废催化剂代表了对环境的关注，这主要是由于它们的金属含量较高。尽管可以使用常规的废催化剂处理方法，但它们会产生大量潜在有害的废物和气体排放物。为了克服环境影响，目前正在探索和开发生物技术方法。因此，本研究测定了巨大芽孢杆菌菌株MNSH1-9K-1去除编码为ECAT-TL-II的废催化剂中所含的Al，Ni，V和Ti的能力。为此，在改良的Starkey培养基中，于37摄氏度和200rpm下，在15％（wt / vol）纸浆密度的情况下，在ECAT-TL-II用过的催化剂存在下，巨大芽孢杆菌MNSH1-9K-1的生长和金属吸收能力得到了评估。 。此处显示的结果显示，在1,059.15 +/- 197.28mgkg（-1）的Al，43.39 +/- 24.13mgkg（- 1）的V和0.58 +/- 0.00mgkg（-1）的Ni，分别相当于每种金属含量的0.79％，1.63％和0.46％，而未检测到Ti的去除。此外，观察到孢子形成过程在废催化剂存在下在巨大芽孢杆菌细胞中发生。这项研究显示的结果表明，MNSH1-9K-1菌株具有去除高金属含量残留物中所含金属的潜力，这也有助于了解在存在B.megaterium的情况下巨大芽孢杆菌的金属抗性和去除能力。废催化剂，以及在去除金属过程中如何发生形态变化。

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