MIL-88A（Fe）吸附-光催化协同降解土壤中菲-芘复合污染物的研究

张程雪; 张帅; 赵赛赛; 王晓聪; 夏梦

doi:10.13205/j.hjgc.202604026

MIL-88A（Fe）吸附-光催化协同降解土壤中菲-芘复合污染物的研究

doi: 10.13205/j.hjgc.202604026

张程雪^1,2,
张帅^1,2,
赵赛赛^1,2,
王晓聪^1,2,
夏梦^1,2, ,

1. 新疆大学生态与环境学院, 乌鲁木齐 830017;
2. 绿洲生态教育部重点实验室, 乌鲁木齐 830017

基金项目:

国家自然科学基金青年基金项目“碳量子点修饰MOF衍生多层级金属氧化物光催化盐碱土石油污染物-CO2同步处理的基础研究”（52200203）；国家自然科学基金地区基金项目“废弃生物质衍生碳基复合材料对石油污染盐渍土的光催化修复研究”（52460027）；天山英才项目—青年人才托举工程“废弃生物质衍生碳基光催化材料对盐碱土中有机污染物-CO2的协同转化研究”（2023TSYCQNTJ0011）

详细信息

作者简介:
张程雪(2000—),女,硕士,主要研究方向为土壤污染治理。zhangchengxue1015@163.com

通讯作者:
夏梦(1990—),女,副教授,主要研究方向为土壤污染治理、生物质催化转化。xiamgyh@xju.edu.cn

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出版历程
- 收稿日期: 2025-06-25
- 网络出版日期: 2026-06-06
- 刊出日期: 2026-04-01

MIL-88A（Fe） adsorption-photocatalytic synergistic degradation of phenanthrene-pyrene composite pollutants in soil

ZHANG Chengxue^1,2,
ZHANG Shuai^1,2,
ZHAO Saisai^1,2,
WANG Xiaocong^1,2,
XIA Meng^{1,2
, ,}

1. College of Ecology and Environment, Xinjiang University, Urumqi 830017, China;
2. Key Laboratory of Oasis Ecology of Education Ministry, Urumqi 830017, China

摘要

摘要: 多环芳烃（PAHs）作为一类典型的持久性有机污染物，广泛存在于土壤中，对生态系统和人类健康构成严重威胁。使用水热溶剂法制备了MIL-88A（Fe）催化剂，并将其应用于菲-芘（PHE-PYR）复合污染土壤的光催化过程，探究MIL-88A（Fe）催化剂的吸附-光催化协同作用。结果表明：MIL-88A（Fe）催化剂对PHE-PYR复合污染物的吸附行为以物理吸附与表面单层吸附为主导，最大吸附量达到97.25 mg/kg，催化剂较强的吸附能力增加了催化剂表面活性位点附近的污染物浓度，从而加速污染物的光催化降解效率；当反应条件为催化剂投加量为3%、土壤含水率为40%、光照时间为60 min、初始污染物浓度为200 mg/kg、初始土壤为酸性时，土壤中PHE-PYR复合污染物的吸附-光催化降解率达到79.20%。进一步探究光催化反应机制，光电化学表征结果表明，MIL-88A（Fe）催化剂在可见光波长范围内具有显著的光响应能力，较窄的禁带宽度（3.04 eV）和能带结构有利于光生电子-空穴对的有效分离，促进光催化反应；淬灭实验结果表明：超氧自由基（·O₂^-）和空穴（h⁺）是该光催化反应体系的主要活性物质，PYR在活性自由基的作用下，经羟基化、氧化以及开环反应转化为PHE，随后PHE发生羟基化和氧化反应进一步分解，最终矿化生成CO₂和H₂O，实现了土壤中PHE-PYR复合污染物的高效降解。
- MIL-88A(Fe)催化剂 /
- PAHs复合污染 /
- 土壤修复 /
- 光催化作用 /
- 吸附作用
Abstract: Polycyclic aromatic hydrocarbons （PAHs）， as a typical class of persistent organic pollutants （POPs）， are widely present in soils and pose a serious threat to ecosystems and human health. In this study， MIL-88A（Fe） catalyst was prepared using a hydrothermal solvent method and applied to the photocatalytic process of phenanthrene-pyrene （PHE-PYR） composite contaminated soil to investigate the adsorption-photocatalytic synergistic effect of MIL-88A（Fe） catalyst. The results showed that the adsorption behavior of MIL-88A（Fe） catalyst on PHE-PYR composite pollutants was dominated by physical adsorption and surface monolayer adsorption， with the maximum adsorption amount reaching 97.25 mg/kg， and the stronger adsorption capacity increased the concentration of pollutants near the active sites on the catalyst surface， which accelerated the pollutants' photocatalytic degradation efficiency； The adsorption-photocatalytic degradation of PHE-PYR composite pollutants in soil reached 79.20% at 3% catalyst dosage， 40% soil water content， 60 min light time， initial pollutant concentration of 200 mg/kg， and initial soil acidity. To further explore the photocatalytic reaction mechanism， the photoelectrochemical characterization results showed that the MIL-88A（Fe） catalyst had a remarkable photoresponsive ability in the visible wavelength range， and the narrow forbidden band width （3.04 eV） and energy band structure were conducive to the effective separation of photogenerated electron-hole pairs， which facilitated the photocatalytic reaction； and the results of the quenching experiments showed that the superoxide radicals （·O2-） and holes （h⁺） were the main active substances in the photocatalytic reaction system， and PYR was converted to PHE by hydroxylation， oxidation and ring-opening reaction under the action of the active radicals， and then PHE was further decomposed by hydroxylation and oxidation reaction， and finally mineralized to generate CO₂ and H₂O， which realized the PHE-PYR composite pollutants in soil The composite pollutants of PHE-PYR in soil were efficiently degraded.
- MIL-88A（Fe） catalyst /
- PAHs composite pollution /
- soil remediation /
- photocatalysis /
- adsorption

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