Activated Char Derived from Polyvinyl Chloride-Layered Double Hydroxide for Organic Pollutant Removal
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Polyvinyl Chloride (PVC) of a thermoplastic is used in diverse applications including pipe, electric wire, and cable insulator due to its chemical stability and flame retardancy. However, PVC is limited in application elsewhere when recovered as a chlorine-containing liquid and gaseous fuel during the pyrolysis process and is harmful to human health when discharged to the environment. On the other hand, conversion to a solid through PVC pyrolysis can be used as an adsorbent. Adsorbent technology is an attractive because it efficiently removes organic pollutants from aqueous systems. Therefore, we have increased the recovery yield of solid residues through PVC pyrolysis using layered double hydroxides (LDH). Furthermore, the influence of LDH results in diverse char structures, which can induce a higher specific surface area upon activation. As a result, the obtained activated PVC-LDH adsorbent demonstrated a higher capacity for removing organic pollutants compared to the pyrolyzed PVC-LDH char.