Marangoni-effect-driven mangrove-inspired wood/hydrogel composite evaporator: Innovative technology for efficient seawater desalination

IF 13.3 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Dingqiang Zheng, Yu Qiu, Ming Zhang, Dongsheng Song, Chuang Zhao, Zhe Zhang, Zhimin Zhao
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引用次数: 0

Abstract

Inspired by the structural design of mangroves, plant-derived polysaccharides extracted from the endosperm of Gleditsia sinensis seeds were utilized to construct a hierarchical solar evaporator. Carbon nanotubes (CNTs) were integrated with a polyol/borax hydrogel system as the photothermal layer, while delignified and drilled balsa wood served as the water transport channel and edge crystallization scaffold. This design enabled regional energy utilization, facilitating inhomogeneous heat management and localized water evaporation. The evaporator exhibited exceptional environmental heat-harvesting capability, achieving an outstanding evaporation rate of 3.02 kg·m−2·h−1 and a remarkable energy efficiency of 119.35 % under 1 sun irradiation. Thermally induced Marangoni convection drove salt ions to migrate through hydrogel micropores towards the wood region for crystallization, allowing stable 48 h continuous operation in high-salinity brine environments (20 wt% NaCl) with a sustained evaporation rate of approximately 2.06 kg·m−2·h−1. This unique architecture provides a novel strategy for designing cost-effective evaporators, significantly advancing their applications in hypersaline brine treatment and wastewater resource recovery.
marangoni效应驱动的红树林灵感木材/水凝胶复合蒸发器:高效海水淡化的创新技术
受红树林结构设计的启发,利用从皂荚种子胚乳中提取的植物源多糖构建了层次化太阳能蒸发器。碳纳米管(CNTs)与多元醇/硼砂水凝胶体系集成作为光热层,而去木素化和钻孔的轻木作为水输送通道和边缘结晶支架。这种设计实现了区域能源利用,促进了不均匀的热管理和局部水蒸发。蒸发器具有出色的环境热收集能力,在1次太阳照射下,蒸发器的蒸发速率为3.02 kg·m−2·h−1,能量效率为119.35 %。热诱导的Marangoni对流驱动盐离子通过水凝胶微孔迁移到木材区域进行结晶,在高盐度盐水环境(20 wt% NaCl)中稳定连续运行48 h,持续蒸发速率约为2.06 kg·m−2·h−1。这种独特的结构为设计具有成本效益的蒸发器提供了一种新颖的策略,显着推进了它们在高盐盐水处理和废水资源回收中的应用。
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来源期刊
Chemical Engineering Journal
Chemical Engineering Journal 工程技术-工程:化工
CiteScore
21.70
自引率
9.30%
发文量
6781
审稿时长
2.4 months
期刊介绍: The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.
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