文献类型：期刊文献

英文题名：Facile design and construction for novel sequestrators via co-functionalization of Ti3AlC2 and biochar with nano-sized FeS in efficient selenite sequestration

作者：Wang, Wei[1];Wu, Hongxiang[1];Ma, Xukun[1];Xu, Mengqi[1];Li, Na[1];Fu, Jiajia[2];Dong, Hongliang[3]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Nanjing Tech Univ, Sch Transportat Engn, Nanjing 211816, Peoples R China;[3]Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China

年份：2025

卷号：13

期号：5

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001529157100001)、、EI(收录号：20252918817264)、Scopus(收录号：2-s2.0-105010844994)、WOS

基金：Acknowledgements This work is supported by National Natural Science Foundation China (52479104, 52179107) .

语种：英文

外文关键词：Co-functionalization; Selenite sequestration; BC@Ti3AlC2/FeS; Ti3AlC2

外文摘要：This contribution was devoted to facile design and construction of novel sequestrators via co-functionalization of Ti3AlC2 and biochar (BC) with nano FeS for highly efficient selenite sequestration. To achieve this goal, three kinds of BC namely bamboo leaf biochar (BLB), rice husk biochar (RHB) and date stone biochar (DSB) was integrated with Ti3AlC2 to co-functionalize FeS naoparticles, and thus three kinds of BC@Ti3AlC2/FeS (BLB@Ti3AlC2/FeS, RHB@Ti3AlC2/FeS, and DSB@Ti3AlC2/FeS) were produced by this way. The as-produced sequestrators were observed to exhibit an intensified performance in sequestering selenite from simulated wastewater. By analysis of X-ray absorption fine structure (XAFS), it was further surprisingly unravelled that co-functionalization of biochar and Ti3AlC2 with FeS could promote reduction of Se(IV) into Se(0), in comparion with that of functionalization of biochar with FeS. Besides, higher sequestrator dosage and lower pH was conducive to selenite sequestration onto BC@Ti3AlC2/FeS. Thermodynamic study (Delta S<0, Delta H<0, Delta G<0) unveiled that selenite sequestered onto the sequestrators was exothermic and spontaneous. The synergistic mechanism was systematically identified by various characterization approaches, and a combination of adsorption and reduction was involved in selenite sequestration. The results unravelled that the BC@Ti3AlC2/FeS could be considered as versatile and promising composites in purifying HMs from wastewaters.