Corona Separation of Fly Ash

Das, Subhankar; Köhnlechner, Rainer; Aman, F.; Dascalescu, Lucien

doi:10.1109/tia.2010.2071170

Cited by 5 publications

(1 citation statement)

References 12 publications

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“…Electrostatic separation of microplastic and sediment is a promising method to reduce the total mass of sediment samples before density separation (Stock et al, 2019). This technology is particularly applied for metal-polymer waste separation and mineral refinement (Manouchehri, 2000;Köhnlechner and Sander, 2009;Das et al, 2010;Gehringer, 2021). A different chargeability of metals, minerals, and polymers are exploited to separate these components (Köhnlechner, 1999;Mirkowska et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Application of electrostatic separation and differential scanning calorimetry for microplastic analysis in river sediments

Kurzweg

Schirrmeister

Hauffe

et al. 2022

Front. Environ. Sci.

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A method with the potential for comprehensive microplastic monitoring in river sediments is presented in this study. We introduce a novel combination of electrostatic separation, density separation, and differential scanning calorimetry (DSC). Currently, microplastic analysis in sediments is limited in terms of sample masses, processing time, and analytical robustness. This work evaluated a method to process large sample masses efficiently and still obtain robust results. Four particulate matrices, including commercial sands and river sediments, were spiked with PCL, LD-PE, and PET microplastic particles (63–200 µm). Samples with a mass of 100 g and 1,000 g (sand only) contained 75 mg of each microplastic. After electrostatic separation, the mass of sand samples was reduced by 98%. Sediment samples showed a mass reduction of 70–78%. After density separation, the total mass reduction of sediment samples was above 99%. The increased concentration of total organic carbon seems to have the highest impact on mass reduction by electrostatic separation. Nevertheless, the recovery of microplastic was independent of the particulate matrix and was polymer-specific. In 100 g samples, the average recovery rates for PCL, LD-PE, and PET were 74 ± 9%, 93 ± 9%, and 120 ± 18%, respectively. The recoveries of microplastic from 1,000 g samples were 50 ± 8%, 114 ± 9%, and 82 ± 11%, respectively. In scale up experiments, high recoveries of all microplastics were observed with a decrease in standard deviation. Moreover, the biodegradable polymer PCL could be used as an internal standard to provide quality assurance of the process. This method can overcome the current limitations of routine microplastic analysis in particulate matrices. We conclude that this method can be applied for comprehensive microplastic monitoring in highly polluted sediments. More studies on electrostatic separation and polymer-specific recovery rates in complex matrices are proposed.

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Section: Introductionmentioning

confidence: 99%

Application of electrostatic separation and differential scanning calorimetry for microplastic analysis in river sediments

Kurzweg

Schirrmeister

Hauffe

et al. 2022

Front. Environ. Sci.

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Electrostatic separator for micronized mixtures of metals and plastics originating from waste electric and electronic equipment

Messal

Corondan

Chetan

et al. 2015

J. Phys.: Conf. Ser.

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Study of a Tribo-Aero-Electrostatic Separator for Mixtures of Micronized Insulating Materials

Benhafssa

Medles

Boukhoulda

et al. 2015

IEEE Trans. on Ind. Applicat.

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This paper is aimed at the optimization of a new tribo-aero-electrostatic separator for micronized isolating materials mixtures, with application at the recycling of waste electrical and electronic equipment. The two high-voltage rotating-cylinder electrodes of the electrostatic separator are partly immersed in a fluidized bed containing the material to be separated. The control variables of the process are the high-voltage applied to the electrodes, the speed of the fluidization air, and the feeding rate of the separator. Experimental design methodology is employed for modeling the separation process. This enables the determination of the values of these variables that ensure the optimal operating condition of the installation.Index Terms-Electrostatic separation, experimental design methodology, micronized materials, waste electrical and electronic equipment (WEEE).

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Corona Separation of Fly Ash

Cited by 5 publications

References 12 publications

Application of electrostatic separation and differential scanning calorimetry for microplastic analysis in river sediments

Application of electrostatic separation and differential scanning calorimetry for microplastic analysis in river sediments

Electrostatic separator for micronized mixtures of metals and plastics originating from waste electric and electronic equipment

Study of a Tribo-Aero-Electrostatic Separator for Mixtures of Micronized Insulating Materials

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