Abstract
An ANPC demulsifier for oily wastewater (OW) was obtained through amine functionalization of regenerated cellulose derived from waste cotton textiles by a hydrothermal process. ANPC was systematically analyzed through morphology, composition, chemical properties, and interfacial properties. The results showed that ANPC had good interfacial activity and a strong ability to reduce the interfacial tension. The bottle test displayed that the light transmittance of separated water (LT) could reach 92.5% and the corresponding oil removal rate (ORR) was 99.4% when the ANPC dosage was 125 mg/L at room temperature. Importantly, ANPC could be adopted at a wide pH range and high salinity. Also, the possible demulsification mechanism was explored by wettability, interfacial activity, interfacial film self-assembly, dynamic interfacial tension, Zeta potential, elasticity modulus and micrographs. This study provides a biological derived demulsifier with low cost and high efficiency.
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