| Grant number: | 11/12158-2 |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| Start date: | March 01, 2012 |
| End date: | February 29, 2016 |
| Field of knowledge: | Engineering - Chemical Engineering |
| Principal Investigator: | Juliana Gardenalli de Freitas |
| Grantee: | Juliana Gardenalli de Freitas |
| Host Institution: | Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil |
| Associated researchers: | Jose Ermirio Ferreira de Moraes ; Sheila Aparecida Correia Furquim |
| Associated scholarship(s): | 15/11199-8 - Impact of chemical oxidation by persulfate in tropical soils: evaluation in 1-D systems,
BP.MS 15/09980-3 - In situ chemical oxidation for remediation of tropical soils contaminated by DNAPLs, BP.IC |
Abstract
Accidental spills in industries and fuel stations are a threat to groundwater quality. Some of the main contaminants are aromatic and halogenated organic compounds. Due to their low aqueous solubility, these compounds may remain as a separate phase in subsurface, known as NAPL (non-aqueous phase liquid). NAPL remediation is a challenge, and it acts as a long term source of contamination. One option for remediation is in-situ chemical oxidation (ISCO), using different oxidants such as permanganate and persulfate. One of the challenges for ISCO is to promote contact between the oxidant and the contaminant. Besides that, the interaction between different oxidants and tropical soils typical in Brazil was not evaluated to date. This research aims to evaluate the fate of oxidants in porous media, particularly tropical soils, to improve the efficacy of ISCO. Initially, the reaction between the oxidants and tropical soils will be quantified in batch tests and column tests. Two-dimensional visualization tests will then be conducted to evaluate transport and fate of oxidants and contaminants. In these tests, the impact of the oxidant concentration on transport and contact with the NAPL will be evaluated. Different soil types and heterogeneities will also be evaluated. This research will improve our knowledge on the fate and transport of oxidants in the soil, leading to an improvement of the design and implementation of ISCO remediation strategies. (AU)
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