蒙脱石胶体对多孔介质中萘迁移的影响研究  

Effect of Montmorillonite Colloids on the Transport of Naphthalene in Porous Media

作　　者：侯瑶 吴盛羽 廖用开 张又弛[1,2] 蔡超 HOU Yao;WU Shengyu;LIAO Yongkai;ZHANG Youchi;CAI Chao(State Key Laboratory for Ecological Security of Regions and Cities,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China)

机构地区：[1]中国科学院城市环境研究所,区域与城市生态安全全国重点实验室,福建厦门361021 [2]中国科学院大学,北京100049 [3]福建农林大学资源与环境学院,福建福州350002

出　　处：《环境科学与技术》2025年第4期45-53,共9页Environmental Science & Technology

基　　金：国家重点研发计划项目(2023YFC3709700)。

摘　　要：文章为探究胶体对污染物迁移的调控机制,以蒙脱石胶体和萘为对象,采用动态迁移柱实验,分析不同因子作用下蒙脱石胶体的环境行为及其对萘迁移的影响。结果表明:蒙脱石胶体抑制萘的迁移,当蒙脱石胶体浓度逐步升高到200 mg/L时,萘的迁移能力降低约20%;在酸、中性条件下,萘的迁移能力均随蒙脱石胶体浓度的升高而降低,降幅分别为27%和21%,碱性条件下蒙脱石胶体浓度对萘迁移的调控作用不显著,离子强度可影响蒙脱石胶体的团聚行为,强化其对萘迁移的抑制作用;两点吸附模型可准确模拟蒙脱石胶体作用下萘的迁移过程(R^(2)在0.89~0.99),量化不同条件下萘相对于地下水流的运移距离,结果显示酸性条件下随蒙脱石胶体浓度升高,对萘迁移的抑制作用增强。A dynamic column experiment was conducted to examine the environmental behavior of montmorillonite colloids under different conditions,and to explore montmorillonite colloids regulatory effect on the transport of naphthalene.Results indicate that montmorillonite colloids reduce the mobility of naphthalene,with a 20%decrease in transport observed as colloid concentration increases to 200 mg/L.Under acidic and neutral conditions,increasing montmorillonite concentrations reduce the transport of naphthalene by 27%and 21%,respectively.In alkaline conditions,colloid concentration shows minimal impact on the transport of naphthalene.Environmental IS influences colloid aggregation behavior and further enhances inhibition of the transport of naphthalene.The two-site adsorption model accurately simulates the transport of naphthalene(R^(2) from 0.89 to 0.99),quantifying relative transport distance(1/Ret)to groundwater flow under different conditions.The results show that increasing montmorillonite concentrations enhances inhibition of the transport of naphthalene under acidic conditions.

关 键 词：蒙脱石胶体 萘 多孔介质 溶质运移 地下水 

分 类 号：X523[环境科学与工程—环境工程]