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- W3213125677 abstract "Fluorine is an essential trace element for human beings and animals and it helps to build strong bones and teeth. It is, however, also toxic to biological health in that an excessive intake of fluorine concentration from a water environment could be dangerous. This study aims to develop a novel and recoverable composite foam polyurethane foam (PUF)-Al2O3 for fluorine removal. The proposed material was developed using dopamine hydrochloride as the underwater adhesive connecting with the adsorption function group of activated nano-Al2O3 and PUF. The activated nano-Al2O3 in the PUF was characterized by SEM and XRD, and the results indicated that PUF-Al2O3 surface hydrophilicity rose significantly when compared with the original PUF. The foam PUF-Al2O3 steadily removed fluorine with a maximum adsorption capacity of 2.08 mg/g. The adsorption isotherm of PUF-Al2O3 was fitted well to the Langmuir isotherm model while the pseudo-first-order model well described the adsorption kinetics of PUF-Al2O3. The composite foam reached adsorption equilibrium in a relatively short time of approximately 10 min. The PUF-Al2O3 presented an excellent regeneration performance in 10 mg/L fluorine solution after 5 cycles. Further adsorption mechanism analysis indicated the ion exchange mechanism played a decisive role in PUF-Al2O3 foam's fluorine removal." @default.
- W3213125677 created "2021-11-22" @default.
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- W3213125677 date "2021-12-01" @default.
- W3213125677 modified "2023-10-05" @default.
- W3213125677 title "Activated nano-Al2O3 loaded on polyurethane foam as a potential carrier for fluorine removal" @default.
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- W3213125677 doi "https://doi.org/10.1016/j.jwpe.2021.102444" @default.
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