冶金
皂甙
零价铁
Boosting(机器学习)
球(数学)
材料科学
化学
化学工程
工程类
数学
医学
计算机科学
人工智能
几何学
有机化学
替代医学
病理
吸附
作者
Xiaobing Wang,Shangbin Yuan,Jiajia Kong,Cailan Chen,Chaozhen Yu,Huang Li-zhen,Hongwei Sun,Xing Peng,Yue Hu
标识
DOI:10.1016/j.jhazmat.2024.134668
摘要
Tea saponins (TS), a natural biosurfactant extracted from tea trees, were co-ball milled with commercial micro zero-valent iron (mZVI) to produce TS modified mZVI (TS-BZVI) for efficient hexavalent chromium (Cr(VI)) removal. The findings demonstrated that TS-BZVI could nearly remove 100% of Cr(VI) within 2 h, which was 1.43 times higher than that by ball milled mZVI (BZVI) (70%). Kinetics analysis demonstrated a high degree of compatibility with the pseudo-second-order (PSO), revealing that TS-BZVI exhibited a 2.83 times faster Cr(VI) removal rate involved primarily chemisorption. Further, X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge structure (XANES) measurements indicated that the TS co-ball milling process improved the exposure of Fe(II) and Fe(0) on mZVI, which further promoted the Cr(VI) reduction process. Impressively, the introduction of TS increased the hydrophobicity of ZVI, effectively inhibiting the H
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