Document 2jd43dXJy63yV569Gqw6ka0kR

Voorstelling PFASmonitoringstechniek iFLUX sampling - iFLUX 21-04-2022 "Groundwater - Making the invisible visible" Provide on-site groundwater monitoring to reduce response times, anticipate pollution, and prevent related risks. We bring to market the next generation of groundwater monitoring solutions. IFLUX's passive sampling and real-time sensing technology can explore the dynamics of pollution flow underground over certain periods of time. Groundwater & mass flux concept = Concentration x Darcy velocity = C x q https://www.itrcweb.org/GuidanceDocuments/MASSFLUX1.pdf iFLUX Passive sampling 80+ projects in 13 countries across EU towards cost-efficient site remediation Patented and validated Captures 90% of all pollution types Accurate measurement of mass flux and direction of spreading Potential remediation cost reduction up to 30% PFAS in groundwater The difficulties Often encountered as large, dilute plumes: >1 mile in length 75% of plume is < 10 g/L Extremely recalcitrant compounds they stay for ever difficult to remediate Very mobile, low retardation Low clean-up criteria: combined 0.07 g/L Analytical issues PFAS in groundwater Why flux measurement? Often encountered as large, dilute plumes: >1 mile in length 75% of plume is < 10 g/L Extremely recalcitrant compounds they stay for ever difficult to remediate Measure mobility Very mobile, low retardation Low clean-up criteria: combined 0.07 g/L Measure accumulation over Analytical issues time PFAS in groundwater Cartridge PFAS Sorbent Cyclopure Cartridge size: 50mm well 63/51 mm Mass flux in g/m/dag Detection Limit flux : 10 g/kg sorbent 5-10 g/m/day 5-80 ng/L PFAS Perfluorohexanoic acid (PFHxA) Perfluoroheptanoic acid (PFHpA) Perfluorooctanoic acid (PFOA) Perfluorononanoic acid (PFNA) Perfluorodecanoic acid (PFDA) Perfluoroundecanoic acid (PFUdA) Perfluorododecanoic acid (PFDoA) Perfluorobutanesulfonic acid (PFBS) Perfluorohexanesulfonic acid (PFHxS) Perfluorooctanesulfonic acid (PFOS) Perfluorooctanesulfonamide (PFOSA) Case: PFAS - fire brigade training ground Objectives : Perform iFLUX measurements to design active barrier To follow-up efficiency of active barrier Single barrier To limit plume expansion Focussed injection on high flux zones Amount liquid activated carbon Injection depth - preferential pathways Case: PFAS - fire brigade training ground Heterogenous layered soil sandy to gravely calcereous clay, occasionally shells mudstone layer below PFAS plume delineation based on concentration 10 meter depth filter depth (mbgl) undee p deep Prevent horizontal spreading by liquid activated carbon Concentrations upstream from barrier (ng/l) PFBA PFDA PFDo PFHp PFHx PFNA PFOA PFOS PFOSA PFPA PFUn DA A A FHxS DA 1500 <1 <1 800 <1 <1 600 3000 70 10 300 10 <2 600 2500 70 10 200 10 <2 300 <1 2500 <1 Case: PFAS - fire brigade training ground PFAS : design of plume barrier Mass flux Low and high conductivity 6 depths Evaluation High K - High flux Low K - Low flux Depending on parameter and concentration Results Save up to 30 % of liquid activated carbon Follow up barrier in layers with high flux Bedankt! Vragen? Galileilaan 15, 2845 Niel, Antwerp Belgium +32 3 443 05 31 +32 499 53 92 91 @ifluxsampling.corn www.ifluxsampling.corn