Modeling of water quality downgradient of a mulch biowall

Alexander Matthew L.; Adeniran Adewale; Tovar Caitlin

摘要

Abstract >Groundwater treatment biowalls may be located close to a surface water body to prevent contaminant discharge from a groundwater plume into the surface water. Groundwater contaminants passing through the biowall are treated within the biowall or immediately downgradient of the biowall. Biowalls designed and constructed for the treatment of chlorinated solvents typically contain either a solid and/or liquid source of organic carbon to promote contaminant degradation by enhanced anaerobic reductive dechlorination. Common solid organic materials in biowalls include wood mulch or similar waste plant material, and common liquid organic materials are vegetable oil (possibly emulsified) or other long‐chain fatty acids. Such biowalls then develop anaerobic conditions in the constructed biowall volume, and potentially downgradient, as dissolved oxygen originally present in the aquifer is consumed. This groundwater condition can lead to the appearance of sulfide if groundwater influent to the biowall contains moderate to high sulfate concentrations. Other researchers have presented evidence for groundwater conditions downgradient of a biowall or a permeable reactive barrier (PRB) that are altered in relation to groundwater quality, besides the desired effect of contaminant degradation or removal by precipitation. The objective of this work was to investigate with modeling the changes in downgradient groundwater species chemistry as a result of a constructed biowall. This was accomplished with a chemical species model to predict levels of sulfate and sulfide present in groundwater in close downgradient proximity to the biowall. The results indicate that downgradient chemical changes could impact a surface water body to which groundwater discharges. The model described could be enhanced by incorporating additional design variables that should be considered in biowall feasibility assessments. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract XMLNS =“http://www.wiley.com/namespaces/wiley”type =“main”xml：lang =“en”> <标题类型=“main”>抽象</ title> >地下水处理Biowall可以靠近地表水体定位，以防止从地下水羽流入地表水的污染物排出。通过BioWALL的地下水污染物在BiOWALL或BioWALL的紧邻降级。为氯化溶剂的处理设计和构造的Biowall通常含有有机碳的固体和/或液体来源，通过增强的厌氧还原脱氯来促进污染物降解。 BioWall中的常见固体有机材料包括木覆盖物或类似的废植物材料，常见的液体有机材料是植物油（可能乳化）或其他长链脂肪酸。然后，这种BiOWALLS在构造的BiOWALL体积中发育厌氧条件，并且可能降低，因为溶解的氧气最初存在于含水层中。如果对BiOWALL的地下水含有中度至高硫酸盐浓度，则该地下水条件可能导致硫化物的出现。除了通过沉淀的所需效果外，其他研究人员已经提出了基础水道或可渗透的反应屏障（PRB）的降级的证据，这些反应屏障（PRB）是相对于地下水质量而改变的。这项工作的目的是通过构造的BioWALL来调查模拟下坡地下水种化学的变化。这是用化学物质模型完成的，以预测地下水中存在的硫酸盐和硫化物的水平，以对BiOWALL的紧密降级接近。结果表明，下坡化学变化可能影响地下水排出的地表水体。通过结合在BiowAll可行性评估中应考虑的附加设计变量来提高描述的模型。</ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-26867/'>《Remediation: The Journal of Environmental Cleanup Costs, Technologies & Techniques》</a> <b style="margin: 0 2px;">|</b><span>2017年第1期</span><b style="margin: 0 2px;">|</b><span>共7页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Alexander Matthew L.&option=202" target="_blank" rel="nofollow">Alexander Matthew L.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Adeniran Adewale&option=202" target="_blank" rel="nofollow">Adeniran Adewale;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Tovar Caitlin&option=202" target="_blank" rel="nofollow">Tovar Caitlin;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Associate Professor Chemical and Natural Gas Engineering Texas A&</p> <p>M University‐Kingsville Kingsville Texas;</p> <p>Texas A&</p> <p>M University‐Kingsville Kingsville Texas;</p> <p>Texas A&</p> <p>M University‐Kingsville Kingsville Texas;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1986.html" title="一般性问题">一般性问题;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> </p> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a 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