项目名称： 人工回灌过程中的胶体效应及其对地下水中微量元素迁移归宿的影响研究

项目编号： No.41472215

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 地质学

项目作者： 张文静

作者单位： 吉林大学

项目金额： 92万元

中文摘要： 人工回灌条件下地下水中微量元素的迁移归宿是影响地下水环境质量安全稳定性的重要因素。近年来发现，地下环境中的天然胶体充当了许多微量元素及无机组分的吸附剂和主要的迁移载体，其在物质传递过程中起着重要作用，从而对地下水环境质量构成潜在威胁。本次研究以山东省博兴县地下暗渠人工回灌试验场地为研究区，分别从宏观和微观尺度上，研究回灌条件下地下水中天然胶体(粒径分布/化学组成)和微量元素的时空变化特征，分析回灌过程中水动力条件(回灌模式/回灌流量)和水化学条件(水化学类型/离子强度/pH值/TOC)对天然胶体释放、沉积、迁移等作用的影响，探讨回灌条件下天然胶体对地下水中微量元素的协同作用机制，与此同时结合天然胶体对含水层结构、渗透性时空变化的影响，预测回灌过程中地下水中微量元素-胶体共迁移的影响范围和影响程度，为保障回灌条件下地下水环境质量安全提供科学依据。

中文关键词： 人工回灌；天然胶体；微量元素；协同作用

英文摘要： The trace elements' transformation during the groundwater artificial recharge process is an important factor, which could influence the stability and safety of the groundwater quality. In recent years, some researches have indicated that the natural colloids appeared underground could co-transport with trace elements and other pollutants, which plays an important role for groundwater quality as a potential threat. So, this study plan to reveal the mechanism of the natural colloids and trace elements co-transport and interaction under the artificial recharge condition, using a test site in Boxing, Shandong province. First of all, the temporal variation characteristics of the natural colloids (size distribution/chemical composition) and trace elements will be analyzed during the recharge process. And based on that, the factors that could affect the natural colloids' deposition, release, and transportation under the artificial condition will be analyzed, such as dynamic conditions (recharge mode/recharge flow), water chemical conditions (water chemical type/ionic strength/pH/TOC), and so on. In addition, according to the target elements in the groundwater, we will discuss the elements and the natural colloids' co-transport and synergy mechanism based on some necessary laboratory experiments and field work. Meanwhile, combined with the aquifer structure, permeability, trace elements and the natural colloids migration and its sphere of influence will be simulated and forecasted. All of that will play a serious role in the groundwater environment protection, and provide some useful information for the artificial recharge projects.

英文关键词： Artificial Recharge;Natural Colloids;Trace Elements;Cooperation