Magnetic susceptibility monitoring and modelling (MSMM): A non-invasive method for acquiring and modelling exceptionally large datasets from column experiments with manufactured nanoparticles
Magnetic susceptibility monitoring and modelling (MSMM): A non-invasive method for acquiring and modelling exceptionally large datasets from column experiments with manufactured nanoparticles
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磁化率监测和建模 (MSMM)：一种非侵入性方法，用于从人造纳米粒子的柱实验中获取异常大的数据集并对其进行建模
DOI：
10.1016/j.colsurfa.2018.12.003
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Riley M
中科院分区：
文献类型：
--
作者：
Riley M
识别和量化的过程中，管理纳米粒子在多孔介质中的传输使用穿透曲线与或不保留配置文件从实验室柱实验是经常受到不确定性，由于有限的信息内容，这样的数据集。已经开发了一个自动化的、非侵入性的磁化率监测和数值建模（MSMM）的集成系统，以提供非常详细的数据集，用于评估柱内磁性纳米颗粒的传输模型的有效性。MSMM为沿柱沿着的每个监测位置产生等效的穿透曲线，并使用增强的数据集来更有效地约束数值模型。使用磁铁矿纳米颗粒的2个示例柱实验的结果被呈现以证明该方法：（i）使用石英砂（在37小时内具有46，002个磁化率测量值）和（ii）使用粉碎的三叠纪砂岩（在20小时内具有19，654个测量值）。石英砂实验表明没有纳米粒子的保留：MSMM表明，该系统可以很好地描述了一个对流-分散模型，预测的突破曲线与来自磁监测和突破曲线获得独立使用荧光素示踪剂一致。与此相反，在砂岩实验中没有观察到突破，但即使在没有突破曲线，MSMM表明，保留过程是空间异质性和物理应变和有限容量的不可逆连接的参数化模型的组合一致。
Identifying and quantifying the processes governing nanoparticle transport in porous media using breakthrough curves with or without retention profiles from laboratory column experiments is frequently subject to uncertainty due to the limited information content of such datasets. An integrated system of automated, non-invasive magnetic susceptibility monitoring and numerical modelling (MSMM) has been developed to provide exceptionally detailed datasets for assessing the validity of transport models of magnetic nanoparticles within a column. MSMM produces the equivalent of a breakthrough curve for each monitored location along the column and uses the enhanced dataset to constrain numerical models more effectively. The results of 2 example column experiments using magnetite nanoparticles are presented to demonstrate the approach: (i) using quartz sand (with 46,002 susceptibility measurements over 37 h) and (ii) using crushed Triassic Sandstone (with 19,654 measurements over 20 h). The quartz sand experiment showed no nanoparticle retention: MSMM showed the system could be well described by an advection-dispersion model, which predicted a breakthrough curve consistent with that derived from magnetic monitoring and with the breakthrough curve acquired independently using a fluorescein tracer. In contrast, no breakthrough was observed in the sandstone experiment, but even in the absence of a breakthrough curve, MSMM indicated that the retention processes were spatially heterogeneous and consistent with a combination of parameterised models of physical straining and limited capacity irreversible attachment.
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