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Separation and Purification Technology

Separation and Purification Technology

IF: 8.09
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Advanced Multi-functional polyurethane sponge with excellent salt Resistant, Antifouling and Oil-Water separation capabilities for highly efficient and Persistent solar?…

Published:4 December 2024 DOI: 10.1016/j.seppur.2024.130936
Qirui Gong, Xiaolong Cao, Guangxu Wang, Tengda Ma, Liangyu Qin, Guanghua He, Yue Zhang, Lihong Fan, Yingying Chu

Abstract

Continuous and efficient seawater evaporation is paramount for sustainable solar-powered freshwater production. However, current solar-powered desalination plants face challenges such as salt accumulation, oil spills, or marine fouling, resulting in operational issues like clogging and corrosion. Hence, there is an urgent need to develop a robust freshwater generation device capable of preventing multiple contaminations. In this paper, a novel multilayer structured composite polyurethane sponge (CDPU) consisting of a photothermal layer (PTPU), a salt and marine fouling-resistant layer (SDPU), and an oil–water separation layer (LPPU) was developed through a straightforward surface coating method. Initially, CDPU efficiently separates oil pollutants from seawater and reclaims spilled oil via the LPPU layer. Subsequent purification is facilitated by the exceptional anti-fouling properties of the SDPU layer, preparing the seawater for desalination via the photothermal layer. This integrated approach boosts the water evaporation rate to approximately 2.22 kg/m2·h with a remarkable photothermal conversion efficiency of 91.9?%. Notably, the CDPU exhibits impeccable resistance (99.99?%) against E. coli and S. aureus and excellent resistance to diatom adhesion. In addition, when augmented with Fe3O4@OA@HCNT nanoparticles, the CDPU demonstrates exceptional prowess in separating and recovering oil spills from seawater. Thus, CDPU emerges as a promising candidate for solar-powered desalination.

Substances (3)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Dimethyl sulfoxide 67-68-5 C2H6OS 1924 suppliers $5.00-$120900.00
Sodium chloride 7647-14-5 ClNa 1692 suppliers $5.00-$6678.62
Chitosan 9012-76-4 C6H11NO4X2 1019 suppliers $13.00-$1125.56

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