title: Efficient microplastics extraction from sand. A cost effective methodology based on sodium iodide recycling.
abstract: Evaluating the microplastics pollution on the shores requires overcoming the technological and economical challenge of efficient plastic extraction from sand. The recovery of dense microplastics requires the use of NaI solutions, a costly process. The aim of this study is to decrease this cost by recycling the NaI solutions and to determine the impact of NaI storage. For studying the NaI recyclability, the solution density and the salt mass have been monitored during ten life cycles. Density, pH and salt mass have been measured for 40days to assess the storage effect. The results show that NaI solutions are recyclable without any density alterations with a total loss of 35.9% after the 10cycles of use. During storage, chemical reactions may appear but are reversible. Consequently, the use of recycling methods allows for a significant cost reduction. How far the plastic extraction by dense solutions is representative is discussed.
authors.affiliation: Université Bretagne Sud, IRDL FRE CNRS 3744, 56100 Lorient, France.
authors.forename: Mikaël
authors.initials: M
authors.lastname: Kedzierski
authors.affiliation: Université Bretagne Sud, IRDL FRE CNRS 3744, 56100 Lorient, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Le Tilly
authors.affiliation: SERPBIO, Université Bretagne Sud, 56321 Lorient, France.
authors.forename: Guy
authors.initials: G
authors.lastname: César
authors.affiliation: Université Bretagne Sud, IRDL FRE CNRS 3744, 56100 Lorient, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Sire
authors.affiliation: Université Bretagne Sud, IRDL FRE CNRS 3744, 56100 Lorient, France. Electronic address: stephane.bruzaud@univ-ubs.fr.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Bruzaud
mesh_terms: D010969:Plastics / Q000302:isolation & purification*; D059027:Recycling; D012822:Silicon Dioxide; D012974:Sodium Iodide / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D010969:Plastics; D014874:Water Pollutants, Chemical; D012822:Silicon Dioxide; D012974:Sodium Iodide
keywords: Extraction technics; Microplastic pollution; Recycling; Sand; Sodium iodide; Storage