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Article

Spanish

ID: <

oai:doaj.org/article:bc04a904c6bb497eac5bb8e5f7ce6216

>

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On-site remediation of diesel-contaminated water by oxidation with hydrogen peroxide

Abstract

The large quantities of hydrocarbons handled in the world and in Mexico generate oil spills and oil derivatives, seriously damaging the environment and especially the sources of groundwater supply. In Mexico, 27 % of drinking water comes from aquifers. This raises the need to develop viable treatment systems that can reduce the rapid and economic pollution of aquifers. This work presents the oxidation of diesel fuel in solution with an oxidising agent, hydrogen peroxide; industrial grade at 50 %. H2O2 was used because it is a well-known strong, user-friendly, low-cost oxidising agent with a higher solubility in water than molecular oxygen. An initial concentration of diesel in solution of 45.000 mg/L was obtained under continuous horizontal stirring in a series system for 114 hours. Samples were taken regularly. At the end of 114 hours, the concentration of hydrocarbon was reduced to 24.000 mg/L, resulting in a reaction rate of 0,0047 h-1 (0,1128 d-1). The study was carried out without catalyst. The effluent had a pH range between 6,5 and 7,5. With the previous results the columns were designed and operated intermittently and compared with columns without the addition of hydrogen peroxide. System efficiency and low cost can be applied in different systems for the treatment of diesel at permeable reactive barriers, reactive areas or groundwater.

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