Khalilnezhad Rana, Olya Mohammad Ebrahim, Khosravi Morteza, Marandi Reza
Department of Applied Chemistry, Faculty of Chemistry North Tehran Branch, Islamic Azad University, Tehran, Iran,
Appl Biochem Biotechnol. 2014 Nov;174(5):1919-34. doi: 10.1007/s12010-014-1076-y. Epub 2014 Aug 26.
Biosorption of manganese(II) using suspended and immobilized cells of fungal Penicillium camemberti (biomass) and nano-P. camemberti (nano-biomass) was studied by evaluating the physicochemical parameters of the solution such as initial manganese ion concentration, pH, temperature, dosage, and contact time in both batch system and fixed bed column. The maximum biosorption obtained from the batch process was 91.54 and 71.08 % for nano-biomass and biomass in initial concentration of 5 ppm, respectively. The Langmuir, Freundlich, Temkin, and BET isotherms isotherm models were used in the equilibrium modeling. The correlation coefficient of more than 0.90 turned out that the adsorption process of Mn(II) on biomass and nano-biomass were in accordance with both Langmuir and Freundlich isotherms. The sorption process followed a second-order rate kinetics indicating the process to be diffusion controlled. The results also demonstrate that an intra-particle diffusion mechanism plays a significant role in the sorption process. The structure of P. camemberti was characterized by FT-IR spectrums.
通过评估溶液的物理化学参数，如初始锰离子浓度、pH值、温度、剂量和接触时间，在间歇系统和固定床柱中研究了用卡门柏青霉的悬浮细胞和固定化细胞（生物量）以及纳米卡门柏青霉（纳米生物量）对锰（II）的生物吸附。在初始浓度为5 ppm时，间歇过程中纳米生物量和生物量的最大生物吸附率分别为91.54%和71.08%。在平衡建模中使用了朗缪尔、弗伦德里希、特姆金和BET等温线模型。相关系数大于0.90表明，Mn（II）在生物量和纳米生物量上的吸附过程符合朗缪尔和弗伦德里希等温线。吸附过程遵循二级速率动力学，表明该过程受扩散控制。结果还表明，颗粒内扩散机制在吸附过程中起重要作用。通过傅里叶变换红外光谱对卡门柏青霉的结构进行了表征。
