ECO-TOXICOLOGICAL EVALUATION OF DIESEL CONTAMINATED RESIDUES HANDLING
| Autor: | Roberto Romero Silva, Claudia Chao Reyes, Silvia Lilibet Acosta Díaz, Yuletsis Díaz Rodríguez, Yamila Navarro Sosa |
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| Jazyk: | Spanish; Castilian |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Centro Azúcar, Vol 47, Iss 4, Pp 45-56 (2020) |
| ISSN: | 2223-4861 0253-5777 |
| Popis: | Introduction: Eco-toxicological tests performance is among current legislation requirements for biodegradation processes of pollutants improvement. Objective: To apply acute toxicity bioassays for treated soils contaminated with diesel eco-toxicological evaluation. Materials and methods: Organization for Economic Cooperation and Development (OECD)guide 207 Procedures were applied in which lettuce (Latuca Sativa) seeds and earthworm (Ensenia Andrei) are used as bioindicators; at test concentrations (1, 5, 25, 50 and 100%). matrices toxic effect was measured calculating mean lethal concentration (LC50). Results and Discussion: Toxicity is obtained in soils treated by bioremediation with microorganism’s addition (bio augmentation) 1 and 2 in the experimentation carried out with lettuce seeds. Soils treated by bioremediation with an increase in organic conditioners (improved) 1 and 2 and chemical - biological stabilization for four execution variants are not toxic. Evaluation carried out with earthworms showed toxicity in soils treated by improved bioremediation and chemical-biological stabilization with agromena. A similar result was obtained with the soil treated by bio augmentation 2. Non-toxicity of the soils treated by chemical-biological stabilization with an improved product and bio augmentation 1 was demonstrated. Conclusions: The toxic nature of the soils treated by bio augmentation No. 1 and 2, improved bioremediation No. 1 and 2 and chemical-biological stabilization No. 2 and 4, constitute a risk for ecosystem. |
| Databáze: | OpenAIRE |
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