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Estudo de remediação de solo contaminado por borra oleosa ácida utilizando a técnica de encapsulamento
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rojas, Jiménez Waldomiro, José |
| Copyright Year | 2007 |
| Abstract | ROJAS, J. W. J. Study for Repairing Soil Contaminated with Acidic Oily Sludge Using the Encapsulation Technique. 2007. Dissertation (M.Eng. in Geotechnics) – Graduate Course in Civil Engineering, UFRGS, Porto Alegre. The objective of this study is applying the encapsulation technique, also known as solidification/stabilization, in soil contaminated with increasing amounts of acidic oily sludge industrial residues, using Portland cement CP-V ARI as the encapsulating agent. The experimental program consisted of studies pre and post-treatment, in which the soil was physically analyzed through geotechnical characterization testings, compactation, unconfined compressive strength, duration and hydraulic conductivity tests. In chemical terms, column leach testings were conducted, along with chemical and physical-chemical analyses of the leachete. Due to the high temperatures detected upon mixing soil/cement and the acidic oily sludge, tests were conducted to monitor the temperature and the hydratation rate of the cement. The results show that the greater the amount of acidic oily sludge in the treated soil, the higher the temperature necessary to hydrate the cement and the faster it reaches the maximum peak, which results in less unconfined compressive strength and greater mass loss. In samples without cement, the hydraulic conductivity reduced upon increasing the amount of acidic oily sludge. When cement is added, the hydraulic conductivity initially decreases with the acidic oily sludge, but it increases again with greater amounts of the substance. The encapsulation technique proved to be efficient in the reduction of heavy metals, due mainly to the pH increase and the precipitation of such components. However, the technique did not prove to be efficient in relation to sulphate, and to the electrical conductivity and the chemical oxygen demand. Key-words: Encapsulation; Acidic Oily Sludge; Portland cement; Soil. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://lume.ufrgs.br/bitstream/handle/10183/10696/000600020.pdf;jsessionid=841366038C894631982064C826492D5E?sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
