硫改性纳米零价铁活化过硫酸钠降解菲的工艺研究

石油炼制与化工 ›› 2023, Vol. 54 ›› Issue (7): 123-129.

硫改性纳米零价铁活化过硫酸钠降解菲的工艺研究

陈昌照¹,赵楠^2,3,凌昊²,鞠峰²

1. 中国地质大学（北京）水资源与环境学院地下水循环与环境演化教育部重点实验室
2. 华东理工大学化工学院
3. 中国建筑第八工程局有限公司

收稿日期:2022-12-02 修回日期:2023-02-17 出版日期:2023-07-12 发布日期:2023-06-21
通讯作者: 鞠峰 E-mail:jufeng@ecust.edu.cn

STUDY ON DEGRADATION OF PHENANTHRENE BY SODIUM PERSULFATE ACTIVATED BY SULFUR MODIFIED NANO ZERO-VALENT IRON

Received:2022-12-02 Revised:2023-02-17 Online:2023-07-12 Published:2023-06-21

摘要/Abstract

摘要： 土壤与地下水环境中的多环芳烃（PAHs）污染治理已成为世界范围内亟待解决的重要环境问题。针对化学降解过程中铁基活化材料降解效能不足的问题，以菲为代表性的污染物，采用液相还原法制备了纳米零价铁（nZVI）和硫改性纳米零价铁（S-nZVI），并通过降解动力学、活化材料表征和氧化剂配比试验优化降解工艺。结果表明：S-nZVI在S/Fe摩尔比为0.28时表现出最好的活性，活化过硫酸钠在90 min时对菲的降解率为88.44%。活化效果由高到低的顺序为S-nZVI ＞ nZVI ＞ Fe²⁺ ＞不添加活化剂。能谱分析结果表明制备得到最适合的S-nZVI纳米活化材料表面的参考S/Fe摩尔比为0.08；在过硫酸盐/S-nZVI摩尔比为200的情况下依然可以保持较高的活化降解效能。

关键词: 硫改性, 纳米零价铁, 过硫酸钠, 菲, 化学降解

Abstract: The remediation of polycyclic aromatic hydrocarbons (PAHs) in soil and groundwater environment has become an important environmental problem in the world. In order to solve the problem of low degradation efficiency of Fe-based activated materials during chemical degradation, nano-zero-valent iron (nZVI) and sulphur-modified nano-zero-valent iron (S-nZVI) were prepared by liquid-phase reduction method, and the phenanthrene degradation process was optimized by degradation kinetics, activation material characterization and oxidant ratio test. The results showed that S-nZVI had the highest activity when the molar ratio of S/Fe was 0.28, and the degradation rate of phenanthrene was 88.44% at 90 min. The order of activation effect from high to low was S-nZVI > nZVI > Fe²⁺> no activator. The results of energy spectrum analysis showed that the reference S/Fe molar ratio of S-nZVI nano-activated material was 0.08. When the molar ratio of persulfate/S-nZVI was 200, the activated degradation efficiency was still high.

Key words: sulfur-modifying, nano zero-valent iron, sodium persulfate, phenanthrene, chemical degradation

陈昌照赵楠凌昊鞠峰. 硫改性纳米零价铁活化过硫酸钠降解菲的工艺研究[J]. 石油炼制与化工, 2023, 54(7): 123-129.

参考文献

[1]吴健, 王敏, 靳志辉, 等.土壤环境中多环芳烃研究的回顾与展望--基于Web of Science大数据的文献计量分析[J].土壤学报, 2016, 无(5):1085-1096 [2]宋康, 孙健, 段永红.工业园区周边土壤中多环芳烃的研究进展[J].山西农业科学, 2017, 45(7):1200-1204 [3]Yang J, Sun P, Zhang X, et al.Source apportionment of PAHs in roadside agricultural soils of a megacity using positive matrix factorization receptor model and compound-specific carbon isotope analysis[J].Journal of Hazardous Materials, 2021, 403(无):123592-无 [4]王山榕, 翟亚男, 王永剑, 等.多环芳烃污染土壤修复技术的研究进展[J].化工环保, 2021, 41(3):247-254 [5]Kumar M, Bolan N S, Hoang S A, et al.Remediation of soils and sediments polluted with polycyclic aromatic hydrocarbons: To immobilize, mobilize, or degrade?[J].Journal of Hazardous Materials, 2021, 420(无):126534-无 [6]刘学敏.基于高级氧化/纳米零价铁降解多环芳烃的研究 [D]. 大连: 大连理工大学, 2018. [7]Vilardi G.Mathematical modelling of simultaneous nitrate and dissolved oxygen reduction by Cu-nZVI using a bi-component shrinking core model[J].Powder Technology, 2019, 343(无):613-618 [8]Wang B, Deng C, Ma W, et al.Modified nanoscale zero-valent iron in persulfate activation for organic pollution remediation: a review[J].Environmental Science and Pollution Research, 2021, 28(无):34229-34247 [9]Li J, Zhang X, Sun Y, et al.Advances in Sulfidation of Zerovalent Iron for Water Decontamination[J].Environmental Science & Technology, 2017, 51(23):13533-13544 [10]Xu J, Li H, Lowry G V.Sulfidized Nanoscale Zero-Valent Iron: Tuning the Properties of This Complex Material for Efficient Groundwater Remediation[J].Accounts of Materials Research, 2021, 2(6):420-431 [11]武国翠.硫化纳米零价铁催化剂的制备及其催化性能研究 [D]. 济南: 山东大学, 2021. [12]Li Y, Zhao X, Yan Y, et al.Enhanced sulfamethoxazole degradation by peroxymonosulfate activation with sulfide-modified microscale zero-valent iron (S-mFe0): Performance, mechanisms, and the role of sulfur species[J].Chemical Engineering Journal, 2019, 376(无):121302-无 [13]Peluffo M, Pardo F, Santos A, et al.Use of different kinds of persulfate activation with iron for the remediation of a PAH-contaminated soil[J].Science of the Total Environment, 2016, 563(无):649-656 [14]Tang J, Tang L, Feng H, et al.pH-dependent degradation of p-nitrophenol by sulfidated nanoscale zerovalent iron under aerobic or anoxic conditions[J].Journal of Hazardous Materials, 2016, 320(无):581-590 [15]Dong H, Hou K, Qiao W, et al.Insights into enhanced removal of TCE utilizing sulfide-modified nanoscale zero-valent iron activated persulfate[J].Chemical Engineering Journal, 2019, 359(无):1046-1055