| 典型荧光示踪剂在包气带中的迁移、吸附特性 |
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| 引用本文： | 赵阳,雷国元,徐亚,刘玉强,董路,刘景财,黄启飞.典型荧光示踪剂在包气带中的迁移、吸附特性[J].中国环境科学,2020,40(9):3842-3848. |
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| 作者姓名： | 赵阳 雷国元 徐亚 刘玉强 董路 刘景财 黄启飞 |
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| 作者单位： | 1. 武汉科技大学资源与环境工程学院, 湖北省工业安全工程技术研究中心, 湖北 武汉 430081;2. 中国环境科学研究院环境基准与风险评估国家重点实验室, 中国环境科学研究院固体废物污染控制技术研究所, 北京 100012 |
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| 基金项目： | 国家重点研发计划（2018YFC1800902）；国家自然科学基金资助项目（51708529） |
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| 摘 要： | 为研究荧光示踪剂在包气带土壤中的迁移-吸附特性，指导填埋场渗漏检测过程的示踪剂选择、投加和采样.采用土柱实验、参数反演手段，研究3种典型荧光示踪剂在包气带中的吸附、滞后和穿透规律，确定其迁移表征方法、表征参数和最佳模型.结果表明：在土壤有机碳相对较高和较低时，分别可用非线性平衡和线性平衡模型准确拟合罗丹明B在其中的穿透数据，而非线性平衡模型同时准确拟合了荧光素和荧光素钠在两种有机碳土壤中的穿透数据.基于最优反演模型，在低有机碳土壤中示踪剂迁移参数为：罗丹明B、荧光素和荧光素钠的分配系数分别为84.99，1.80，1.48cm3/g，滞后因子分别为393.27，8.18，7.81，吸附容量分别为6.14×10-3，0.15×10-3，0.14×10-3mg/g，均出现罗丹明B>荧光素>荧光素钠的顺序.荧光素钠在包气带中迁移时固相吸附浓度最小、迁移速率最快、吸附消耗量最小，建议在进行填埋场渗漏示踪中选用.
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| 关 键 词： | 渗漏检测 污染预警 包气带 溶质运移参数 |
| 收稿时间： | 2020-02-13 |
Migration,adsorption characteristics of typical fluorescent tracer in vadose zone |
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| ZHAO Yang,LEI Guo-yuan,XU Ya,LIU Yu-qiang,DONG Lu,LIU Jing-cai,HUANG Qi-fei.Migration,adsorption characteristics of typical fluorescent tracer in vadose zone[J].China Environmental Science,2020,40(9):3842-3848. |
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| Authors: | ZHAO Yang LEI Guo-yuan XU Ya LIU Yu-qiang DONG Lu LIU Jing-cai HUANG Qi-fei |
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| Institution: | 1. Industrial Safety Engineering Technology Research Center of Hubei Province, School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;2. State Key Laboratory of Environment Benchmarks and Risk Assessment, Research Institute of Solid Waste Management, Chinese Research Academy of Environment Sciences, Beijing 100012, China |
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| Abstract: | Adsorption and transport properties of the fluorescent tracer in vadose zone soil system were investigated to guide the choice, addition, sampling of tracer during landfill leakage detection process. To determine the characterization method, characterization parameters and best model of tracers, soil column experiments and parameter inversion method were used to study the law of adsorption, retention, and breakthrough of 3typical fluorescent tracers in vadose zone soil. Results showed that in higher and lower organic carbon soil, Rhodamine B breakthrough data by soil were fitted well with the Non-Linear Equilibrium (NE) model and the Linear Equilibrium (LE) model respectively, but breakthrough data of fluorescein and Sodium fluorescein were fitted well with NE model. Based on the best inversion model, the tracer migration parameters in lower organic carbon soil were: The distribution coefficients of Rhodamine B, Fluorescein, and Sodium fluorescein were respectively 84.99, 1.80, 1.48cm3/g; The retardation factors of them were respectively 393.27, 8.18, 7.81; The adsorption capacity of them were respectively 6.14×10-3, 0.15×10-3, 0.14×10-3mg/g. It was shown that the three parameters of tracers were ranked in descending order as follows: Rhodamine B> fluorescein>Sodium fluorescein. Sodium fluorescein showed the properties of least adsorption concentration, the fastest migration rate, the least adsorption capacity when transported at vadose zone in our study, we recommend to use Sodium fluorescein as a conservative tracer during landfill leakage tracing. |
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| Keywords: | leakage detection pollution warning vadose zone solute transport parameters |
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