Job title:
Post-doctoral researcher
Company:
Job description
Offer DescriptionMissionsBackground:There are few techniques for extracting PFAS (per- and polyfluoroalkylated substances) from soils. Among them, in situ washing involves injecting a solvent (typically water) into the soil, with or without additives (e.g. surfactants or alcohols), to desorb pollutants from the soil and then extracting the washing solution for treatment.Injecting these liquids into heterogeneous porous media is tricky, as the less permeable zones will be less well cleaned due to hydrodynamic instabilities and preferential pathways. To achieve good injection homogeneity in heterogeneous media, surfactants or alcohols can be injected using non-Newtonian shear-thinning liquids, using approaches similar to those used for enhanced oil recovery. The viscosity of such fluids decreases with increasing shear rates. Injected liquids will be more viscous in permeable layers and less viscous in less permeable layers. This means they can theoretically sweep the entire porous medium more evenly. Aqueous foam can behave as a shear-thinning fluid and have the advantage of generating fewer fluids effluent than, e.g., polymers.The postdoctoral research will focus on the development of non-Newtonian liquids, and in particular aqueous foams, to desorb PFAS from soils while generating as little effluent as possible.ActivitiesThe aim of the postdoctoral research is to develop a method for extracting PFAS from porous media using non-Newtonian liquids, mainly foams. The PFAS studied will be long-chain (more than 6 carbon atoms), short-chain (between 3 and 6 carbon atoms) and ultra short-chain (less than 3 carbon atoms). The postdoctoral research will focus mainly on laboratory experiments. Batch studies will focus on the adsorption and desorption of different PFAS with different soil matrices and water compositions. Different non-Newtonian liquid formulations will be characterized (interfacial tension, viscosity, foamability, etc.). 1D column tests with different porous media will be used to validate the formulations developed (extraction yields, flow/pressure ratio, type of injection). These tests will be validated in 2D tanks. Monitoring will be carried out using TDR probes and image interpretation techniques.Where to apply E-mail[email protected]RequirementsResearch Field Environmental science » Earth science Education Level PhD or equivalentResearch Field Chemistry » Biochemistry Education Level PhD or equivalentSkills/QualificationsSpecific training
- Ability to use experimental set-up such as 1D column tests and 2D tanks and use TDR probes and image interpretation techniques
- Experience on process application for the removal of organic micropollutants in complex matrices
Computer tools
- Office package and perform statistical analyses
Professional qualities
- Be able to solve problems
- Have the ability to work independently (in autonomy) as well as interact well in a research group
- Demonstrated ability to work effectively in a multi-disciplinary team
- A high proficiency in written and spoken English.
Training and experience requiredMinimum of 5 years experience including PhD study periodEducation level or diploma : The candidate must hold a PhD in fluid mechanics in porous media, hydrogeology or soil remediation. Previous knowledge in the formulation of non-Newtonian liquids, and in particular foams, will be highly appreciated.Languages ENGLISH Level ExcellentResearch Field Environmental science » Earth scienceChemistry » Biochemistry Years of Research Experience 4 – 10Internal Application form(s) neededPost-doctoral researcher for process development for recovering PFAS in high concentrations from soils using aqueous foams_0.pdfEnglish(180.12 KB – PDF)Additional InformationSelection processHow to applyCV and cover letterDeadlines for applications : until the position has been filledAdditional commentsContacts (Stéfan Colombano, ; Maxime Cochennec, ; Amélie Cavelan, ; Eric van Hullebusch, ) Website for additional job detailsWork Location(s)Number of offers available 1 Company/Institute Institut de physique du globe de Paris Country France State/Province Ile-de-France City Paris Postal Code 75005 Street 1 rue Jussieu GeofieldContact CityParis cedex 05 WebsiteStreet1 rue Cuvier Postal Code75238 E-Mail[email protected][email protected][email protected][email protected]STATUS: EXPIREDShare this page
Expected salary
Location
Paris
Job date
Thu, 02 Jan 2025 08:47:34 GMT
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