文献类型：期刊文献

英文题名：Enhanced adsorption of Eu(III) from wastewater using Solidago canadensis-derived biochar functionalized by Ca/Al-LDH and hydroxyapatite

作者：Dong, Lijia[1];Li, Shengbo[1];Jin, Yefei[1];Hu, Baowei[1];Sheng, Guodong[1,2]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Sch Chem & Chem Engn, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China

年份：2021

卷号：567

外文期刊名：APPLIED SURFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000691216500001)、、WOS

基金：This work was financially supported for the design of the study, the data collection, analysis, and interpretation, and writing the manuscript by the Natural Science Foundation of Zhejiang Province (LY20C030003) and National Natural Science Foundation of China (31700476) . We also sincerely thank the young and middle-aged academic cadres fromShaoxing University.

语种：英文

外文关键词：Biochar; CaAl-LDH; Hydroxyapatite; Europium; Adsorption

外文摘要：In this paper, CaAl hydmtalcite or hydroxyapatite decorated invasive plant (Solidago canadensis)-derived biochar were synthesized by co-precipitation and high temperature pyrolysis method. The three composites and bare biochar were characterized by Scanning electron microscopy (SEM), X-ray spectroscopy (EDX), the Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), and X-ray photoelectron spectroscopy (XPS) techniques, and employed to remove Eu(III) from wastewater under a series of environmental conditions. The results indicated that the Eu(III) adsorption on BC@LDH@HAP was higher than that on BC, BC@LDH, and BC@HAP, and belonged to multi-layer adsorption, which was different from the monolayer adsorption of biochar. The adsorption could be fitted best by Langmuir model and the maximum adsorption capacity of Eu(III) on BC@LDH@HAP was up to 714 mg/g at pH similar to 6. The characterization results suggested that this excellent adsorption of BC@LDH@HAP arose from the abundant P-, C-, O-containing functional groups rather than larger specific surface area. The spectra of XPS, FT-IR, and XRD uncovered that the adsorption mechanisms of Eu(III) on BC@LDH@HAP involved surface complexation, ion exchange, and precipitation. Moreover, the absorbed Eu(III) was formed into two precipitate induced by P-containing groups and carbonate groups. This research confirmed BC@LDH@HAP is a promising material for the removal of Eu(III) in wastewater.