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Sustainable off-grid desalination of hypersaline waters using Janus wood evaporators
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2021-07-20 , DOI: 10.1039/d1ee01505b
Xi Chen 1 , Shuaiming He 2 , Mark M. Falinski 1 , Yuxi Wang 1, 3 , Tian Li 2 , Sunxiang Zheng 1 , Dongya Sun 1 , Jiaqi Dai 2 , Yanhong Bian 1 , Xiaobo Zhu 1 , Jinyue Jiang 1 , Liangbing Hu 2 , Zhiyong Jason Ren 1
Affiliation  

Solar-thermal evaporation is a promising technology for energy-efficient desalination, but salt accumulation on solar absorbers and system longevity are the major challenges that hinder its widespread application. In this study, we present a sustainable Janus wood evaporator that overcomes these challenges and achieves a record-high evaporation efficiencies in hypersaline water, one of the most difficult water sources to treat via desalination. The Janus wood evaporator has asymmetric surface wettability, where the top layer acts as a hydrophobic solar absorber with water blockage and salt resistance, while the bottom hydrophilic wood layer allows for rapid water replenishment and superior thermal insulation. An evaporation efficiency of 82.0% is achieved for 20% NaCl solution under 1 sun, and persistent salt-resistance is observed during a 10-cycle long-term test. To ensure the environmental impact of the Janus wood evaporator, for the first time, a life cycle assessment (LCA) is conducted to compare this Janus wood evaporator with the emerging Janus evaporators, indicating a functional and more sustainable opportunity for off-grid desalination and humanitarian efforts.

中文翻译:

使用 Janus 木材蒸发器对超咸水进行可持续的离网淡化

太阳能热蒸发是一种很有前途的节能脱盐技术,但太阳能吸收器上的盐分积累和系统寿命是阻碍其广泛应用的主要挑战。在这项研究中,我们提出了一个可持续剑锋木蒸发器克服了这些挑战,并在超咸水,最困难的水源地对待一个实现了创纪录的高蒸发效率通过海水淡化。Janus 木蒸发器具有不对称的表面润湿性,其中顶层充当具有阻水和抗盐性的疏水太阳能吸收器,而底部亲水木层可实现快速补水和卓越的隔热性能。20% NaCl溶液在1个太阳下蒸发效率达到82.0%,并在10个周期的长期测试中观察到持久的耐盐性。为确保 Janus 木材蒸发器对环境的影响,首次进行生命周期评估 (LCA) 以将该 Janus 木材蒸发器与新兴的 Janus 蒸发器进行比较,表明离网海水淡化和更可持续的功能性机会人道主义努力。
更新日期:2021-08-10
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