Biosorption of uranium(VI) from aqueous solution by dead fungal biomass of Penicillium citrinum
Biosorption of uranium(VI) from aqueous solution by dead fungal biomass of Penicillium citrinum
复制标题
DOI：
10.1016/j.cej.2010.10.068
复制
发表时间：
2011-05
影响因子：
15.1
通讯作者：
Cui Pang;Yunhai Liu;Xiaohong Cao;Min Li;G. Huang;R. Hua;Caihua Wang;Yating Liu;Xiaoqiang An-Xiao
中科院分区：
文献类型：
--
作者：
Cui Pang;Yunhai Liu;Xiaohong Cao;Min Li;G. Huang;R. Hua;Caihua Wang;Yating Liu;Xiaoqiang An-Xiao
探讨了桔青霉非生物菌体去除和回收水溶液中铀的能力。用扫描电子显微镜、能谱仪和傅立叶变换红外光谱对该生物吸附剂进行了表征。考察了初始溶液pH、初始铀浓度、接触时间、生物质投加量、温度等实验参数对吸附的影响。塞普。在初始pH为6.0时，吸附时间为5h时，橘红对铀的吸附效果最好，在初始铀浓度为50g/−时，随着温度的升高，吸附容量从103.1 mg/μ增加到127.3 mg/L。吸附动力学可用准二级模型较好地描述，吸附过程可用Langmuir和Freundlich等温式较好地描述，但Freundlich等温式较Langmuir等温式能更好地描述吸附过程。测定了吸附过程的热力学参数：ΔG°(308K)、ΔH°和ΔS°，分别为−20.48kJ·mol−_1、10.76kJ·mol−_1和101.43−·1K−_1。本研究的结果表明，茶多酚具有较强的抗肿瘤活性。桔青素作为生物吸附剂去除水溶液中的铀离子具有很大的潜力。
The ability of non-living biomass ofPenicillium citrinumhas been explored for the removal and recovery of uranium from aqueous solutions. The biosorbent was characterized by SEM, EDS and FT-IR. The influences of different experimental parameters such as initial solution pH, initial uranium concentration, contact time, biomass dosage and temperature on adsorption were investigated. TheP. citrinumexhibited the highest uranium sorption capacity at an initial pH of 6.0 and at 5 h. Biosorption capacity increased from 103.1 to 127.3 mg g−1with an increase in temperature from 298 to 318 K at an initial uranium concentration of 50 μg/mL. Adsorption kinetics was better described by the pseudo-second-order model and adsorption process could be well defined by both the Langmuir and Freundlich isotherms, however, Freundlich isotherm displayed a better fitting model than Langmuir isotherm. The thermodynamic parameters: ΔG° (308 K), ΔH°, and ΔS° for sorption process were determined to be −20.48 kJ mol−1, 10.76 kJ mol−1, and 101.43 J mol−1K−1, respectively. The results presented in this study showed that theP. citrinumoffered great potential as a biosorbent to remove uranium ions from aqueous solutions.