a Department of Microbial Biotechnology, School of Biology, College of Science , University of Tehran , Tehran , Iran.
b Nanobiotechnology Research Center , Baqiyatallah University of Medical Sciences , Tehran , Iran.
Artif Cells Nanomed Biotechnol. 2018;46(sup3):S1092-S1101. doi: 10.1080/21691401.2018.1533841. Epub 2018 Nov 19.
A novel bio-nanocomposite was prepared by the combination of fungal biomass and FeO magnetic nanoparticles. The result of XRD and EDAX analysis indicated that FeO Actinomucor sp. bio-nanoadsorbent was prepared. Our experiments showed that the adsorption kinetics and isotherm of this material comply with the pseudo-second-order and the Langmuir models, respectively. The maximum adsorption capacity (q) of this novel bio-nanoadsorbent was obtained as 29.49 mg/g. The thermodynamic analysis revealed that the adsorption of Cd is spontaneous and exothermic. The optimum temperature, initial concentration, contact time and pH for adsorption system of cadmium were about 45 °C, 400 mg/L, 120 min and 7, respectively. Pretreatment of adsorbent by NaOH and SDS significantly increased cadmium adsorption capacity. SEM images showed that FeO nanoparticles were immobilized successfully on the fungus cell surface. Contribution of the carboxyl, hydroxyl, amine and Fe-O functional groups of the bio-nanoadsorbent in the binding to cadmium ions was revealed by FTIR analysis. Results from regeneration studies indicated reusability of the adsorbent up to 91%. According to experimental results, it could be claimed that bio-nanocomposite of FeO-Actinomucor sp. is a novel efficient adsorbent for removal of metal ions from aqueous solutions, and hence it has potential to be used in the environmental pollution cleanup programs.
一种新型的生物纳米复合材料是通过真菌生物质和 FeO 磁性纳米粒子的结合制备的。XRD 和 EDAX 分析的结果表明，FeO 放线菌生物纳米吸附剂已制备成功。我们的实验表明，该材料的吸附动力学和等温线分别符合准二级和朗缪尔模型。这种新型生物纳米吸附剂的最大吸附容量（q）为 29.49mg/g。热力学分析表明，Cd 的吸附是自发和放热的。吸附体系中 Cd 的最佳温度、初始浓度、接触时间和 pH 值分别约为 45°C、400mg/L、120min 和 7。NaOH 和 SDS 对吸附剂的预处理显著提高了 Cd 的吸附容量。SEM 图像显示 FeO 纳米粒子成功地固定在真菌细胞表面。FTIR 分析揭示了生物纳米吸附剂中的羧基、羟基、胺和 Fe-O 官能团在与 Cd 离子结合中的作用。再生研究的结果表明，吸附剂的重复使用效率高达 91%。根据实验结果，可以声称 FeO-放线菌生物纳米复合材料是一种从水溶液中去除金属离子的新型高效吸附剂，因此有望用于环境污染清理计划。
