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A New Route of Valorization of Petrochemical Wastewater: Recovery of 1,3,5-Tris (4-tert-butyl-3-hydroxy-2,6-dimethyl benzyl)–1,3,5-triazine-2,4,6-(1H,3H,5H)-trione (Cyanox 1790) and Its Subsequent Application in a PP Matrix to Improve Its Thermal Stability
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This study characterized soil macro- and microplastic contamination across different land use types in Brazil, including agricultural, urban, and native vegetation areas. Agricultural soils showed high microplastic loads attributed to plastic mulch films and drip irrigation equipment, while urban soils contained diverse polymer types from multiple diffuse sources.
The various chemicals in industrial wastewater can be beneficial for improving its circularity. If extraction methods are used to capture valuable components from the wastewater and then recirculate them throughout the process, the potential of the wastewater can be fully exploited. In this study, wastewater produced after the polypropylene deodorization process was evaluated. These waters remove the remains of the additives used to create the resin. With this recovery, contamination of the water bodies is avoided, and the polymer production process becomes more circular. The phenolic component was recovered by solid-phase extraction and HPLC, with a recovery rate of over 95%. FTIR and DSC were used to evaluate the purity of the extracted compound. After the phenolic compound was applied to the resin and its thermal stability was analyzed via TGA, the compound's efficacy was finally determined. The results showed that the recovered additive improves the thermal qualities of the material.
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Researchers recovered phenolic antioxidant additives from polypropylene deodorization wastewater using solid-phase extraction at greater than 95% recovery, then re-incorporated the purified compounds back into PP resin, demonstrating improved thermal stability and showing that industrial wastewater can serve as a circular feedstock rather than a disposal problem.
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Researchers recovered (Z)-13-Docosenamide, a polymer additive byproduct from polypropylene resin synthesis, from industrial wastewater and demonstrated its reuse in plastic production, supporting circular economy approaches to industrial waste streams.
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Researchers developed analytical methods to detect and recover a sorbitol-based clarifying agent used as a polypropylene plastic additive from industrial wastewater. Identifying and removing plastic additives from industrial effluents helps prevent these chemicals from entering aquatic environments where they can concentrate on microplastics.
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