Pi Yongrui, Duan Chenyang, Zhou Yanli, Sun Shujuan, Yin Zhendong, Zhang Haichuan, Liu Chongfeng, Zhao Ye
School of Ocean, Yantai University, Yantai 264005, PR China.
School of Ocean, Yantai University, Yantai 264005, PR China.
J Hazard Mater. 2022 Feb 15;424(Pt C):127577. doi: 10.1016/j.jhazmat.2021.127577. Epub 2021 Oct 28.
A bio-nanocluster (FeO@bacteria) was prepared by simply mixture using the bacterial suspension and FeO nanoclusters to remove Congo red (CR) contamination from water resources. The bio-nanocluster was characterized by SEM, TEM and XPS. Adsorption efficiency, adsorption process and adsorption mechanism were comprehensively investigated. The maximum adsorption capacity (Q) of CR dye onto the FeO@bacteria peaked at 320.1 mg/g, which was 2.88 times that of FeO under the same condition. Based on the equilibrium and kinetic studies, the Langmuir isotherm theory and pseudo-first-order model is appropriate to describe the adsorption process. The adsorption of CR is spontaneous and exothermic according to the thermodynamics parameters (ΔG, ΔH and ΔS). The adsorption force dominated the Van der Waals force, biofloculation and chemisorption. The FeO@bacteria could be applied potentially as an absorbent with high efficiency and environmentally friendly remediation of dyeing wastewater.
通过简单混合细菌悬浮液和FeO纳米团簇制备了一种生物纳米团簇（FeO@细菌），用于去除水资源中的刚果红（CR）污染。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对该生物纳米团簇进行了表征。综合研究了吸附效率、吸附过程和吸附机理。CR染料在FeO@细菌上的最大吸附容量（Q）达到320.1 mg/g，是相同条件下FeO的2.88倍。基于平衡和动力学研究，Langmuir等温线理论和准一级模型适用于描述吸附过程。根据热力学参数（ΔG、ΔH和ΔS），CR的吸附是自发的且放热的。吸附力主要为范德华力、生物絮凝和化学吸附。FeO@细菌有望作为一种高效且环境友好的吸附剂用于印染废水的修复。
