Comparison of Effective Active Spreading Designs for In Situ Groundwater Remediation
Comparison of Effective Active Spreading Designs for In Situ Groundwater Remediation
复制标题
地下水原位修复有效主动撒布设计的比较
DOI：
10.1061/9780784484258.013
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Greene, J. A.
中科院分区：
文献类型：
--
作者：
Neupauer, R. M.;Mays, D. C.;Ye, M.;Greene, J. A.
在污染地下水的原位修复过程中，将化学或生物改进剂引入污染物羽流中与污染物发生反应。只有当改进剂和污染物相互接触时才会发生反应，因此提出了主动扩散来增加两种反应物之间的接触面积。通过主动扩散，井被安装在污染物羽流附近，并按照预先定义的注入和提取顺序进行操作，以创建一个时空变化的流场，改变反应物羽流的形状，通常导致接触面积的增加，从而增加反应。主动扩散系统的设计取决于污染物的反应化学性质。本研究考虑了污染物通过三种不同类型反应的主动扩散情景：(1)非吸附性水性污染物A，通过与非吸附性水性改良剂B的反应，不可逆地降解为良性化学物质C；(2)吸附污染物A，该污染物通过与不吸附的水性改进剂B反应，不可逆地降解为良性化学物质C，其中A的吸附与B的浓度无关；(3)污染物A，表现出可逆的平衡表面络合，其流动相和固定相的浓度取决于改改剂b的浓度。我们比较了这三种反应的主动扩散策略，并确定了每种策略的特征，从而增强了地下水污染物的去除。
During in situ remediation of contaminated groundwater, a chemical or biological amendment is introduced into the contaminant plume to react with the contaminant. Reactions occur only where the amendment and contaminant are in contact with each other, so active spreading has been proposed to increase the contact area between the two reactants. With active spreading, wells are installed in the vicinity of the contaminant plume and are operated in a pre-defined sequence of injections and extractions to create a spatio-temporally varying flow field that changes the shapes of the reactant plumes, generally leading to an increase in contact area and therefore an increase in reaction. The design of the active spreading system depends on the reaction chemistry of the contaminant. This study considers active spreading scenarios for contaminants with three different types of reactions: (1) non-sorbing aqueous contaminant, A, that degrades irreversibly to a benign chemical, C, through reaction with a non-sorbing aqueous amendment, B; (2) sorbing contaminant, A, that degrades irreversibly to a benign chemical, C, through reaction with a non-sorbing aqueous amendment, B, where sorption of A is independent of the concentration of B; and (3) contaminant, A, that exhibits reversible equilibrium surface complexation with concentrations in the mobile and immobile phases dependent on the concentration of the amendment, B. We compare the active spreading strategies for these three types of reactions and identify the characteristics of each strategy that lead to enhanced removal of groundwater contaminants.
基于保守组分降阶化学基础的多孔介质中反应输运的随机游走模型
影响因子：
5.4
作者：
G. Sole‐Mari;Michael J. Schmidt;D. Bolster;D. Fernàndez‐Garcia
通讯作者：
D. Fernàndez‐Garcia
主动扩散：加强地下水修复的水力学
影响因子：
2.4
作者：
Sather, Lauren J.;Neupauer, Roseanna M.;Mays, David C.;Crimaldi, John P.;Roth, Eric J.
通讯作者：
Roth, Eric J.