Mechanical and chemical analysis of degraded plastic bags exposed in air, water, and soil

被引:0
作者
Oliveira, Warlen Librelon [1 ]
Uliana Junior, Paulo Sergio [1 ,2 ]
Lins, Vanessa de Freitas Cunha [1 ]
机构
[1] Univ Fed Minas Gerais, Dept Engn Quim, Ave Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG, Brazil
[2] Univ Fed Minas Gerais, Dept Engn Mecan, Ave Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG, Brazil
来源
MATERIA-RIO DE JANEIRO | 2024年 / 29卷 / 01期
关键词
Plastic bags; Environmental degradation; Tensile strength; POLYETHYLENE FILMS; BIOTIC DEGRADATION;
D O I
10.1590/1517-7076-RMAT-2023-0315
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This study is aimed at analyzing the mechanical behavior of low-density polyethylene (LDPE) plastic bags exposed for three years to air, immersed in polluted and tap water, buried in soil, and exposed on the soil surface. The pH and conductivity analyses for polluted water resources, clean water and soil extract were performed. Semi-quantitative chemical analysis of soil using X-ray fluorescence spectrometry (XRF) was performed. For the mechanical assay, a 100 kN load cell was used subjected to a traction with obtaining strain curve x deformation. The aqueous soil extract is rich mainly in nitrate, sulfate, and calcium. The polluted water in which the bags were immersed had a high concentration of chlorides, and contained nitrate, sodium, and calcium. Finally, tap water contained mostly sulfate, sodium, calcium, and chloride ions. However, the chloride content of polluted water is ten times the content of tap water. The tensile strength and elongation of degraded samples are lower than the reference, confirming the process of degradation. An exception was the deformation of plastic bag buried in soil which was the highest.
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页数:6
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