Salt-harvesting aerogel prepared by sodium carboxymethyl cellulose/polyurethane based on interfacial water evaporation for wastewater treatment
摘要
This study presents a sodium carboxymethyl cellulose/waterborne polyurethane (CMC-Na/WPU) aerogel evaporator with uniform layered structure for solar-driven interface evaporation. Addressing challenges in high-salinity dyeing wastewater treatment, the aerogel achieves an evaporation rate of 1.683 kg m−2 h−1 under standard solar irradiation while demonstrating exceptional salt collection capability (0.6124 kg m−2 h−1 in 15 wt% brine). It effectively treats dyeing wastewater with over 99.9% ion removal efficiency and maintains stable performance through 10 evaporation cycles. The integrated design enables simultaneous efficient water purification and salt recovery, offering a sustainable solution for hypersaline wastewater management. This technology combines remarkable environmental adaptability with cycling durability, advancing practical applications in renewable energy-driven water treatment and resource recovery.