EVALUATION OF WATER PERMEABILITY IN COMPACTED SAND-BENTONITE LINERS FROM LANDFILL USING PLANNING AND FACTORIAL ANALYSIS

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-25 DOI:10.3846/jeelm.2024.21830

Thiago Fernandes da Silva, M. Lyra, Isaac Fernandes da Silva, W. Paiva, M. Melo, V. Monteiro

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Abstract

Compacted Clay Liners (CCL) are designed to prevent environmental contamination in landfills. These layers are designed with low permeability soils, which are difficult to obtain. To this end, bentonite can be added. The objective of this work is to evaluate the reliability of factor analysis on the hydraulic performance of sand-bentonite mixtures. Two types of designs were used, with the variables controlled: compaction energy (CE), water content (U) and percentage of bentonite (B). Experimental layers were made to obtain water permeability (kw). The results showed that CE and B are, respectively, the factors that most influence permeability. The application of adequate energy promotes better accommodation of bentonite soil particles in the voids in the sand, which, when moistened, undergo an expansion process, reducing the voids in the layer. All of these parameters can be optimized by using a curvature design to obtain kW. Therefore, knowledge of CCL kw is essential to ensure the safety of the local environmental environment.

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利用规划和因子分析评估垃圾填埋场压实砂膨润土衬里的透水性

压实粘土衬垫（CCL）是为防止垃圾填埋场的环境污染而设计的。这些衬垫层采用难以获得的低渗透性土壤。为此，可以添加膨润土。这项工作的目的是评估因素分析对砂膨润土混合物水力性能的可靠性。采用了两种类型的设计，变量控制为：压实能（CE）、含水量（U）和膨润土百分比（B）。实验层获得了透水性（kw）。结果表明，CE 和 B 分别是对透水性影响最大的因素。充足的能量可促进膨润土颗粒更好地容纳在砂的空隙中，而砂在湿润后会发生膨胀过程，从而减少土层中的空隙。所有这些参数都可以通过曲率设计进行优化，以获得 kW。因此，了解 CCL kw 对于确保当地环境安全至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.