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首页> 外文期刊>African Journal of Biotechnology >Effective biosorption of reactive blue 5 by pH-independent lyophilized biomass of Bacillus megaterium
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Effective biosorption of reactive blue 5 by pH-independent lyophilized biomass of Bacillus megaterium

机译：pH依赖性巨大芽孢杆菌冻干生物质对活性蓝5的有效生物吸附

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To find pH-independent biosorbent, the biosorption characteristic of lyophilized biomass of?Bacillus?megaterium?was tested in this study. Biosorption equilibrium and kinetics of an azo dye (reactive blue 5) were investigated using the aforementioned biosorbent. The optimal adsorbent dosage for maximal dye uptake was 2.5 gL-1?and the dye uptake values varied little in the pH range of 2 to 11, as well as in solutions with different metal ions. The Langmuir biosorption isotherm model was found suitable for describing the biosorption of the dye. It can also be observed that the dye uptake process followed both the first and second order model. The negative value of?G?indicated that the biosorption is spontaneous in nature.?Fourier transform infrared(FTIR)?analysis revealed that amine, hydroxyl, carboxyl and phosphonate groups were involved in the biosorption process.
机译：为了找到不依赖于pH的生物吸附剂，本研究测试了“巨大芽孢杆菌”的冻干生物质的生物吸附特性。使用上述生物吸附剂研究了偶氮染料（活性蓝5）的生物吸附平衡和动力学。最大染料吸收量的最佳吸附剂量为2.5 gL-1 ?，在2至11的pH范围内以及在具有不同金属离子的溶液中，染料吸收值变化不大。发现Langmuir生物吸附等温线模型适用于描述染料的生物吸附。还可以观察到染料吸收过程遵循一阶和二阶模型。 γG的负值表明生物吸附是自然发生的。傅立叶红外光谱分析表明，胺，羟基，羧基和膦酸酯基团参与了生物吸附过程。

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