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Removal of uranium using MnO2/orange peel biochar composite prepared by activation and in-situ deposit in a single step
Biomass & Bioenergy ( IF 5.8 ) Pub Date : 2020-09-22 , DOI: 10.1016/j.biombioe.2020.105772
Dai Ying , Peng Hong , Fan Jiali , Tao Qinqin , Liu Yuhui , Wang Youqun , Zhang Zhibin , Cao Xiaohong , Liu Yunhai

Orange peel is an important resource in view of its low-cost and universal nature. A novel material (MnO2/orange peel carbon, MnO2/OPC) was yielded via a single step involving activation and in situ deposit. The feasibility of uranium removal using MnO2/OPC was tested by varying MnO2 loading amount, pH, ionic strength, uranium initial concentration and temperature. 1.2MnO2/OPC yielded the most competitive uptake value as 246.3 mg g−1. The pH beneficial for adsorption was 5.5. The adsorption taken the way of inner-sphere surface complexation and the process was an endothermic, entropy increasing and spontaneous process in nature. The work gave enlightening results for reusing orange peel as raw materials to produce a kind of scavenger materials of economy and effectivity in the field of treating radioactive aqueous solution.



中文翻译:

使用通过一步活化和原位沉积制备的MnO 2 /橙色果皮生物炭复合材料去除铀

鉴于橙皮的低成本和通用性,它是一种重要的资源。通过涉及活化和原位沉积的单个步骤,产生了新型材料(MnO 2 /橙色果皮碳,MnO 2 / OPC)。通过改变MnO 2的添加量,pH,离子强度,铀的初始浓度和温度来测试使用MnO 2 / OPC去除铀的可行性。1.2MnO 2 / OPC的吸收值最具竞争力,为246.3 mg g -1。有利于吸附的pH为5.5。吸附是通过内球表面络合的方式进行的,在自然界是一个吸热,熵增,自发过程。这项工作为再利用橘皮作为原料生产一种在放射性水溶液处理领域中经济有效的清除剂提供了启发性的结果。

更新日期:2020-09-22
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