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Effect of Lead on the Geotechnical Behaviour of Fine-Grained Soil
Heavy metal contamination of soils and its control has become a challenging issue globally. Accumulation of heavy metals in environment causes serious health issues on living organisms due to its harmful effects on the soil biota, crop yield and pollution of ground water table. It is also found that heavy metals mineralization into more stable form does not occur easily. The present study investigated the impact of lead heavy metal on geotechnical characteristics of fine-grained soil. A silt soil with low plasticity (ML) is artificially contaminated with high concentration of lead, i.e. 5000 and 10,000 mg/kg. Then the contaminated soil is subjected to different laboratory experiments to observe the changes in Atterberg limits, specific gravity, compaction characteristics and shear strength of soil. The results indicated that liquid limit, plastic limit and MDD increased for both concentrations of lead polluted soil, whereas specific gravity and OMC value were reduced. The strength test results concluded that with the increase in lead content from 0 to 10,000 mg/kg, the UCS value increases compared to the uncontaminated soil. The main cause for this can be the reduction in thickness of diffuse double layer of soil particles during the interaction with lead. Overall, it can be said that heavy metal greatly influences the geotechnical behaviour of fine-grained soil.
Effect of Lead on the Geotechnical Behaviour of Fine-Grained Soil
Heavy metal contamination of soils and its control has become a challenging issue globally. Accumulation of heavy metals in environment causes serious health issues on living organisms due to its harmful effects on the soil biota, crop yield and pollution of ground water table. It is also found that heavy metals mineralization into more stable form does not occur easily. The present study investigated the impact of lead heavy metal on geotechnical characteristics of fine-grained soil. A silt soil with low plasticity (ML) is artificially contaminated with high concentration of lead, i.e. 5000 and 10,000 mg/kg. Then the contaminated soil is subjected to different laboratory experiments to observe the changes in Atterberg limits, specific gravity, compaction characteristics and shear strength of soil. The results indicated that liquid limit, plastic limit and MDD increased for both concentrations of lead polluted soil, whereas specific gravity and OMC value were reduced. The strength test results concluded that with the increase in lead content from 0 to 10,000 mg/kg, the UCS value increases compared to the uncontaminated soil. The main cause for this can be the reduction in thickness of diffuse double layer of soil particles during the interaction with lead. Overall, it can be said that heavy metal greatly influences the geotechnical behaviour of fine-grained soil.
Effect of Lead on the Geotechnical Behaviour of Fine-Grained Soil
Lecture Notes in Civil Engineering
Reddy, Krishna R. (editor) / Kalia, Susheel (editor) / Tangellapalli, Srinivas (editor) / Prakash, Divya (editor) / Kamdar, Bhoomi A. (author) / Solanki, Chandresh H. (author)
2022-10-26
8 pages
Article/Chapter (Book)
Electronic Resource
English
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