Recycling of styrofoam waste: synthesis, characterization and application of novel phenyl thiosemicarbazone surface

Abstract

An attempt has been made to recycle Styrofoam waste to a novel functional polymer, Phenyl thiosemicarbazone surface (PTS). Polystyrene (PS) obtained from Styrofoam waste was acetylated and then condensed to PTS by reacting it with 4-Phenyl-3-thiosemicarbazide ligand and characterized by FT-IR spectroscopy and elemental analysis. Synthesized PTS was applied successfully for the treatment of lead contaminated water by batch extraction method. Sorption variables were optimized (pH 8, adsorbent dose 53mg, initial Pb(II) ion concentration 10mgl -1 and agitation time 90min) by factorial design approach. Lead uptake by PTS was found much sensitive to the pH of Pb(II) ion solution. The maximum removal (99.61%) of Pb(II) ions was achieved at optimum conditions. The Langmuir and D-R isotherm study suggested the monolayer, favorable (RL=0.0001-0.01) and chemisorption (E=20.41±0.12kJmol-1 ) nature of the adsorption process. The sorption capacity of PTS was found to be 45.25±0.69mgg -1 . The FT-IR spectroscopy study showed the involvement of nitrogen and sulphur of thiosemicarbazone moiety of PTS for the uptake of Pb(II) ions by fi ve membered chelate formation.

Amine-free CO2-switchable hydrophilicity solvents and their application in extractions and polymer recycling

“…EPS has an air content of about 90–95 vol% and a range of densities between 16 and 640 kg m −3 . 79 EPS foam is widely used as an insulator, protective material for products during transportation, disposable food containers, and many other applications. 80 However, the non-degradable nature and stable chemical properties of EPS, associated with its large volume, have created environmental issues.…”

Current Prospects for Plastic Waste Treatment

“…One of the methods for chemical recycling is dissolution. Figure 4 illustrates PS degradation by dissolution and a scheme of liquid products valuable in PS depolymerization, such as catalytic pyrolysis, dilute acid, and pyrolysis [ 105 , 106 ]. The polymeric components are first dissolved, then various processes are used to recover the solvent and polymer [ 107 ].…”

Penggunaan Styrofoam sebagai Material Bilah Turbin Angin

“…Styrofoam merupakan nama dagang dari expandable polystyrene (EPS) yang tersusun dari 5% polystyrene (PS) dan 95% udara. Pada umumnya, styrofoam digunakan sebagai isolator dan bahan kemasan untuk peralatan listrik rumah tangga [11].…”