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首页> 外文期刊>Environmental research >Evolution of dissolved organic matter during artificial groundwater recharge with effluent from underutilized WWTP and the resulting facilitated transport effect
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Evolution of dissolved organic matter during artificial groundwater recharge with effluent from underutilized WWTP and the resulting facilitated transport effect

机译：利用未充分的WWTP与流出物的人造地下水补给过程中溶解有机物的演变及其促进式运输效应

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摘要

Currently, the interaction between contaminants and dissolved organic matter (DOM) during artificial ground-water recharge (AGR) with effluent from underutilized wastewater treatment plant (WWTP) is unclear. The present study investigated DOM evolution in this AGR scenario. The DOM composition in the inflow was identified to be distinct to that of the outflow due to the release of soil humic acid (HA). The soluble soil HA was then extracted and used in co-transport experiments with tetracycline (TC). The separated HA transport through the soil column exhibited high mobility with mass recovery >92.5% in the effluent. Following the mixing of injected TC and HA, the TC breakthrough in the column increased with HA concentration. TC was heavily adsorbed by the soil without the presence of HA, yet the retention ratios decreased from 63.60% to 53.30% for the HA range of 0-20 mg L~(-1). An advection-dispersion-retention (ADR) numerical model was developed to effectively quantify the HA-TC co-transport, with results demonstrating the reduction in the TC attachment rate with increasing HA concentrations. Furthermore, batch adsorption experiments, kinetics and isotherms models, and FTIR spectra analysis were implemented to determine the underlying mechanism. The co-transport behavior was observed to be a function of the relative soil sorption affinity between HA and TC. The weaker sorption of the HA-coated TC compared to the separated TC consequently suggests that HA is likely to compete for available soil adsorption sites. Thus, the release of soil humus during AGR can potentially facilitate the transport of the introduced contaminants.
机译：目前，污染物与溶解有机物质（DOM）之间的相互作用在人工地水再充电期间（AGR），来自未充分利用的废水处理厂（WWTP）的流出物尚不清楚。本研究调查了这一农业情景中的DOM演变。由于土壤腐殖酸（HA）的释放，鉴定了流入中的DOM组合物与流过流量不同。然后萃取可溶性土壤HA并用于用四环素（Tc）共传送实验。通过土壤柱的分离的HA运输在流出物中表现出高迁移率> 92.5％。在注射的TC和HA的混合之后，柱中的TC突破随HA浓度而增加。在没有HA的情况下，Tc受到土壤的重吸附，但保留比率从63.60％降低至0-20mg l〜（-1）的HA范围内的63.60％至53.30％。开发了一种平程 - 分散保留（ADR）数值模型以有效地量化HA-TC共传输，结果表明TC附着速率的降低随着HA浓度的增加。此外，实施了批量吸附实验，动力学和等温机构和FTIR光谱分析以确定潜在机制。观察到共传送行为是HA和TC之间的相对土壤吸附亲和力的函数。与分离的Tc相比，HA涂覆的TC的吸附较弱，因此HA可能会竞争可用的土壤吸附位点。因此，AGR期间土壤腐殖质的释放可能有助于促进引入的污染物的运输。

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  • 来源
    《Environmental research》 |2021年第2期|110527.1-110527.9|共9页
  • 作者

    Wei Fan; Tiantian Guo; Sili Gao; Ying Lu; Yanli Meng; Mingxin Huo;

  • 作者单位

    Key laboratory of Groundwater Resources and Environment (Jilin University) Ministry of Education China School of Environment Northeast Normal University China;

    School of Environment Northeast Normal University China;

    Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences China;

    Key laboratory of Groundwater Resources and Environment (Jilin University) Ministry of Education China;

    School of Physics Northeast Normal University China;

    School of Environment Northeast Normal University China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Artificial groundwaters recharge; Dissolved organic matter; Humic acid; Tetracycline; Facilitated transport;

    机译：人造地下水补给;溶解有机物;腐植酸;四环素;促进运输;

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