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首页> 外文期刊>The Science of the Total Environment >Landfill leachate treatment by sorption in magnetic particles: preliminary study
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Landfill leachate treatment by sorption in magnetic particles: preliminary study

机译：通过磁性颗粒吸附的垃圾填埋场渗滤液：初步研究

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摘要

Leachates are still an open issue in environmental protection. Many of the applied methods for their treatment present low efficiency and thus need to be used collectively. In practice reverse osmosis is mostly used, as it is the most effective option, regardless of its cost. Magnetic methods to treat effluents have been used for water and wastewater treatment by the use of magnetic particles together with magnetic separation for the removal of contaminants. However, large-scale applications are few or even non-existent when we deal with complex contaminated media such as landfill leachates, for which not even research studies at laboratorial scale with real samples have been done yet. In this work, we apply for the first time magnetic sorption for the treatment of leachates, and close the full cycle by studying the regeneration and re-use of the magnetic particles; we also study the influence of the concentration of magnetic particles, the use of several pre-treatment methodologies and the type of particle used in the process, in real landfill samples from the waste treatment plant of Salamanca (Spain), for the removal of COD, NO3-, NO2-, NH4+, Total-N, PO43-, SO42- and Cl-. Regeneration of the magnetic particles alter being used in the sorption stage is also studied, as well as their efficiency regarding their re-use. It is also determined the optimum number of batches for complete desorption and for regeneration of the particles, the effect of successive regeneration and re-use cycles, the use of two different regeneration methods, the efficiency of the desorption, the effect of the quantity of solvent and the influence of the time of sorption. Due to its innovative character and the complexity of the media, this work represents a first preliminary approach and, although some promising results have been obtained, further studies are required to completely understand and evaluate the proposed treatment process. (C) 2018 Elsevier B.V. All rights reserved.
机译：渗滤液仍然是环境保护的开放问题。许多应用方法的治疗方法呈现低效率，因此需要共同使用。在实践中，逆转渗透主要使用，因为它是最有效的选择，无论其成本如何。用磁性颗粒与磁性分离一起用于去除污染物的磁性分离已经用于水和废水的磁性方法已经用于水和废水。然而，当我们处理垃圾填埋渗滤液等复杂的受污染介质时，大规模应用很少甚至不存在，甚至没有使用真实样本的实验室规模的研究研究。在这项工作中，我们申请第一次磁力吸附来治疗渗滤液，并通过研究磁性颗粒的再生和重新使用来关闭整个循环;我们还研究了磁性颗粒的浓度，使用几种预处理方法和过程中使用的颗粒的类型的影响，从萨拉曼卡（西班牙）废物处理厂的实际垃圾填埋样品中，用于去除鳕鱼，no3-，no2-，nh4 +，total-n，po43-，so42和cl-。还研究了用于吸附阶段的磁性颗粒的再生，以及它们的重用效率。还确定了完全解吸的最佳批次数量和用于再生的颗粒，连续再生和重新使用循环的效果，使用两种不同的再生方法，解吸效率，效果的数量溶剂和吸附时间的影响。由于其创新性质和媒体的复杂性，这项工作代表了第一个初步方法，虽然已经获得了一些有希望的结果，但需要进一步的研究来完全理解和评估所提出的治疗过程。 （c）2018年elestvier b.v.保留所有权利。

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