摘要：The in situ remediation of V(V) pollution in groundwater by the sulfidated microscale zero-valent iron (S-mZVI) is promising, while the practical application of S-mZVI faces a great challenge due to its gravitational sedimentation. Herein, we proposed an effective and environmentally friendly strategy to stabilize S-mZVI using xanthan gum (XG), and elucidated the mechanisms focused on the XG-induced stabilization, the removal of V(V) by SmZVI and XG composites (S-mZVI@XG), and the XG-enhanced removal of V(V). First, S-mZVI@XG was fabricated with various XG concentrations, and the characterization confirmed the presence of the adsorbed and dispersed XG. Then, the stability of S-mZVI@XG was tested. It was found that as XG increased, the stability of SmZVI@XG was improved due to electrostatic repulsion and steric-hinerance effect. Specifically, the settlement of S-mZVI@XG5 (XG = 5.0 g & sdot;L-1) was not found, and by contrast, more than 87.0 % of S-mZVI settled in 10 min. Finally, the application of S-mZVI@XG towards V(V) removal was studied. The results showed that the removal rate of V(V) reached 95.2 % by S-mZVI@XG5, greater than that by pristine S-mZVI (64.0 %). The reduction of V (V) to V(IV) and V(III) by Fe0, Fe2+, and S2- and the precipitation were major removal mechanisms. In addition, the XG-enhanced removal of V(V) was mainly ascribed to the stabilization and synergistic effects. These findings provided mechanical and technical insights into the practical application of stabilized S-mZVI for remediation of V(V) pollution in groundwater.

关键字：Microscale zero -valent iron; Xanthan gum; Stabilization; Vanadium (V)

ISSN号：1383-5866

卷、期、页：卷: 349

发表日期：2024-12-03

影响因子：0.000000

期刊分区（SCI为中科院分区）：一区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY

参与作者：Kong, Xiangrui,Wang, Jianchao,Dong, Yuecen,Yin, Shuie,Yue, Dongbei,Wang, Hongtao,Liu, Yuan,Shi, Yanli,Liu, Xianghui

第一作者：第五鹏祥

论文类型：期刊论文

论文概要：Kong, Xiangrui,Wang, Jianchao,Dong, Yuecen,Yin, Shuie,第五鹏祥,Yue, Dongbei,Wang, Hongtao,Liu, Yuan,Shi, Yanli,Liu, Xianghui，Green biopolymer stabilizer induced robust removal of vanadium (V) by sulfidated microscale zerovalent iron，SEPARATION AND PURIFICATION TECHNOLOGY，2024，卷: 349

论文题目：Green biopolymer stabilizer induced robust removal of vanadium (V) by sulfidated microscale zerovalent iron