Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China.
Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China.
Environ Sci Technol. 2023 Sep 5;57(35):13047-13055. doi: 10.1021/acs.est.3c03457. Epub 2023 Aug 22.
Solar desalination has shown great potential in alleviating global water scarcity. However, the trade-off between energy efficiency and salt rejection remains a challenge, restricting its practical applications. In this study, we report a three-dimensional nitrocellulose membrane-based evaporator featuring a high evaporation rate (1.5 kg m h) and efficient salt precipitation at the edges. Additionally, the salt is isolated from the photothermal area of the evaporator and falls automatically with a salt recovery rate of 97 g m h in brine with 10 wt % salt content. The distinctive performance is attributed to the precise water supply control, which was adjusted by changing the resistance force and driven force in the evaporator. With a high evaporation rate, stable performance, and specific salt recovery ability, this solar evaporation structure holds great potential in water desalination and resource recovery.
太阳能淡化在缓解全球水资源短缺方面显示出巨大的潜力。然而，能量效率和盐排斥之间的权衡仍然是一个挑战，限制了其实际应用。在这项研究中，我们报告了一种基于三硝基纤维素膜的蒸发器，其具有高蒸发率（1.5 千克每小时每平方米）和在边缘处高效盐沉淀的特点。此外，盐被隔离在蒸发器的光热区，并且在盐水（盐含量为 10wt%）中以 97 克每小时每平方米的盐回收率自动下降。这种独特的性能归因于精确的供水控制，这是通过改变蒸发器中的阻力和驱动力来调节的。这种太阳能蒸发结构具有高蒸发率、稳定性能和特定的盐回收能力，在海水淡化和资源回收方面具有很大的潜力。
