Remediation of soil contaminated by di(2-ethylhexyl) phthalate by chemical oxidation or bioremediation
- PDF / 1,086,712 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 41 Downloads / 217 Views
ORIGINAL PAPER
Remediation of soil contaminated by di(2‑ethylhexyl) phthalate by chemical oxidation or bioremediation E. J. Ordoñez‑Frías1 · V. I. Domínguez‑Rodríguez1 · R. H. Adams1 Received: 19 August 2020 / Revised: 9 October 2020 / Accepted: 31 October 2020 © Islamic Azad University (IAU) 2020
Abstract Soil leachates from di(2-ethylhexyl)phthalate-contaminated soil to groundwater could potentially cause toxicity, depending on the physical and chemical properties of the soil, and modifications in the phthalate, thus affecting health in nearby human populations. For this reason, the following study was accomplished, evaluating the effectiveness of soil remediation based on the Toxicity Characteristic Leaching Procedure-like leachates from treated soil. Since there are not any environmental regulations for this emerging contaminant in country, simply reducing the DEHP concentration in soil or leachates was not sufficient for regulatory purposes to assure regulators of remediation success. As an alternative, acute toxicity was used as the cleanup criterion. This was done using the filter paper test of Organization for Economic Cooperation and Development Protocol No. 207 with earthworms, which was applicable, since the country in which the study was done is a member of the Organization for Economic Cooperation and Development, and accepts its test protocols. In contaminated soil leachates, the earthworms exhibited a ruptured body wall with bloody wounds and expulsion of coelomic fluid, and those surviving worms showed a reduction in movement with practically null response to stimulus. Contaminated soil treated by chemical oxidation with 2.5% of hydrogen peroxide showed the greatest toxicity reduction, up to 94%, demonstrating the technical feasibility of this treatment method. The soil treated by bioremediation (simulation of landfarm operation) was also effective after five months of treatment, showing no significant difference with the negative control (uncontaminated soil). Keywords Earthworms · Leachate potential · Remediation · Groundwater
Introduction About 100,000 chemical substances are produced and utilized by industry, many of which are an integral part of our daily lives. The world market for chemical products has an enormous impact on employment and economic growth. However, many substances are discharged inappropriately into environmental matrices. These contaminants can have the potential to induce a great variety of acute and chronic effects to human health and environmental systems such as endocrine alterations, immunological toxicity, neurological Editorial responsibility Samareh Mirkia. * R. H. Adams [email protected] 1
División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, Carretera Villahermosa‑Cárdenas Km. 0.5 S/N, Entronque a Bosques de Saloya, 86150 Villahermosa, Tabasco, Mexico
disorders, cancers, etc. (Sanchez and Egea 2018). Emerging contaminants can be defined as substances that have been detected in the environment, but which currently are not i
Data Loading...
