文献类型：期刊文献

英文题名：Engineered phosphorous-functionalized biochar with enhanced porosity using phytic acid-assisted ball milling for efficient and selective uptake of aquatic uranium

作者：Zhou, Yuanbiao[1,2] Xiao, Jiang[3] Hu, Rui[1,2] Wang, Tianhui[1,2] Shao, Xuelian[1,2] Chen, Guangcai[3] Chen, Lin[1,2] Tian, Xingyou[1,2]

第一作者：Zhou, Yuanbiao

通信作者：Hu, R[1];Tian, XY[1]

机构：[1]Chinese Acad Sci, Inst Appl Technol, Hefei Inst Phys Sci, Hefei 230088, Peoples R China;[2]Chinese Acad Sci, CAS Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China;[3]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China

年份：2020

卷号：303

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：;EI(收录号：20200708165002);Scopus(收录号：2-s2.0-85079226069);WOS:【SCI-EXPANDED(收录号:WOS:000533612700042)】；

基金：This work was supported by the CAS Pioneer Hundred Talents Program; the CASHIPS Director's Fund, China (grant number YZJJ2018QN20); and the National Natural Science Foundation of China (grant number 21875257). We also acknowledged the partially support from China Postdoctoral Science Foundation (grant numbers 2018M640200, 2019T120154).

语种：英文

外文关键词：Phosphorous surface modification; Ball-milling treatment; Enhanced pore structure; Selective U(VI) extraction

摘要：The efficient extraction of uranium is challenging for radioactive wastewater treatment. Concerning to the specific coordination of functional groups with radionuclides, the development of ideal sorbents with high surface area, enhanced porosity and abundant functional groups compatibly to uptake uranium selectively is of great significance. Biochar, an attractive material to concentration aquatic targets, exhibits a positive correlation of surface area and pore volume of biochars with pyrolysis temperature, whereas a negative relation of surface functionality with thermolysis temperature. Here we applied a facile and environmental-friendly ball-milling technique to engineer raw biochars in the presence of phytic acid. Ball-milling treatment increased the external surface area of biochars by reducing grain sizes, as well as enhanced the micropore surface area by exposing blocked micropore networks. P-containing moiety was grafted to the surface of biochar matrix successfully. The physicochemical characteristics of biochars enabled a high uptake capacity (128.5 mg/g) and favorable selectivity of U(VI). It suggested that ball-milling of raw biochars with activating solvents could achieve an excellent performance for the efficient concentration of aquatic uranium. (C) 2020 Elsevier B.V. All rights reserved.