Interaction of diesel oil contaminants with laterite soil and bentonite treated by sawdust -landfill liner

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geomechanics and Geoengineering-An International Journal Pub Date : 2022-04-29 DOI:10.1080/17486025.2022.2067595

B. Phanikumar, M. Shankar, M. D

{"title":"Interaction of diesel oil contaminants with laterite soil and bentonite treated by sawdust -landfill liner","authors":"B. Phanikumar, M. Shankar, M. D","doi":"10.1080/17486025.2022.2067595","DOIUrl":null,"url":null,"abstract":"ABSTRACT Landfill liners blended with industrial by-product seems to outperform the conventional liners. This paper presents the influence of sawdust (SD) admixed with bentonite and locally available lateritic soil on consistency limits, free swell index (FSI), compaction characteristics, unconfined compressive strength (UCS), hydraulic conductivity and leachate characteristics. SD content was varied as 10%, 15% and 20%. Diesel oil contaminants (DOC) and deionised water (DIW) were used as the test fluids. From the test results, consistency limits, FSI, maximum dry density, leachate concentration of heavy metals and UCS decreased, whereas optimum moisture content and hydraulic conductivity increased with increasing sawdust content. Furthermore, the energy-dispersive X-ray spectrometer revealed the absence of calcium in the blends which have resulted in poor cementation and decreased the UCS. X-ray diffraction showed that the presence of cellulose in sawdust and montmorillonite in bentonite adsorb the heavy metals in DOC. Based on the test results, 15% Saw dust content in the blends proves to be the optimum in retaining the heavy metal concentrations, improving the geotechnical properties and qualifying as a landfill liner material.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":"18 1","pages":"441 - 457"},"PeriodicalIF":1.7000,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geomechanics and Geoengineering-An International Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/17486025.2022.2067595","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}

引用次数: 0

Abstract

ABSTRACT Landfill liners blended with industrial by-product seems to outperform the conventional liners. This paper presents the influence of sawdust (SD) admixed with bentonite and locally available lateritic soil on consistency limits, free swell index (FSI), compaction characteristics, unconfined compressive strength (UCS), hydraulic conductivity and leachate characteristics. SD content was varied as 10%, 15% and 20%. Diesel oil contaminants (DOC) and deionised water (DIW) were used as the test fluids. From the test results, consistency limits, FSI, maximum dry density, leachate concentration of heavy metals and UCS decreased, whereas optimum moisture content and hydraulic conductivity increased with increasing sawdust content. Furthermore, the energy-dispersive X-ray spectrometer revealed the absence of calcium in the blends which have resulted in poor cementation and decreased the UCS. X-ray diffraction showed that the presence of cellulose in sawdust and montmorillonite in bentonite adsorb the heavy metals in DOC. Based on the test results, 15% Saw dust content in the blends proves to be the optimum in retaining the heavy metal concentrations, improving the geotechnical properties and qualifying as a landfill liner material.

查看原文本刊更多论文

木屑-填埋衬里处理后的红土和膨润土与柴油污染物的相互作用

与工业副产品混合的垃圾填埋场衬垫似乎优于传统衬垫。本文研究了木屑(SD)与膨润土和当地可用红土混合对稠度极限、自由膨胀指数(FSI)、压实特性、无侧限抗压强度(UCS)、导电性和渗滤液特性的影响。SD含量分别为10%、15%和20%。柴油污染物(DOC)和去离子水(DIW)作为测试流体。从试验结果来看，随着木屑含量的增加，稠度限值、FSI、最大干密度、渗滤液重金属浓度和UCS均降低，而最佳含水率和水力导电性则增加。此外，能量色散x射线谱仪显示，共混物中缺乏钙，导致胶结不良，降低了UCS。x射线衍射表明，木屑中的纤维素和膨润土中的蒙脱土对DOC中的重金属有吸附作用。试验结果表明，混合料中锯末含量为15%时，在保持重金属浓度、改善土工性能和作为填埋场衬垫材料方面效果最佳。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geomechanics and Geoengineering-An International Journal ENGINEERING, GEOLOGICAL-

CiteScore

3.80

自引率

0.00%

发文量

期刊介绍： Geomechanics is concerned with the application of the principle of mechanics to earth-materials (namely geo-material). Geoengineering covers a wide range of engineering disciplines related to geo-materials, such as foundation engineering, slope engineering, tunnelling, rock engineering, engineering geology and geo-environmental engineering. Geomechanics and Geoengineering is a major publication channel for research in the areas of soil and rock mechanics, geotechnical and geological engineering, engineering geology, geo-environmental engineering and all geo-material related engineering and science disciplines. The Journal provides an international forum for the exchange of innovative ideas, especially between researchers in Asia and the rest of the world.