{"title":"Enhancing solar evaporator efficiency and reducing salt fouling by separating evaporation surface and water pump","authors":"Hoyeon Kim, GyuHeon Im, Jonghwi Lee","doi":"10.1016/j.mtsust.2025.101206","DOIUrl":null,"url":null,"abstract":"<div><div>Solar-driven evaporation has emerged as a promising approach for sustainable seawater purification. However, most reported methods often suffer from problems such as low efficiency, scaling, and fouling. To address these long-term limitations, this study presents a novel solar evaporator design that separates the evaporation surface from the water pumping column. This design allows the water pumping column to maintain the same salinity and temperature as the bulk seawater, minimizing scaling, fouling and heat loss. The system employs a temperature-responsive hydrogel with aligned pores to facilitate non-powered water transport driven by diurnal temperature fluctuations. Additionally, the design uses a floating graphene composite paper (GCP) evaporation surface that moves with the water level inside the evaporation chamber, automatically adjusting the angle between the evaporation surface and the sun to optimize energy absorption. Experimental results demonstrate that this configuration effectively prevents salt accumulation within the water channels, minimizes heat loss, and achieves enhanced evaporation rates, thereby offering a viable solution for efficient and sustainable seawater purification.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"31 ","pages":"Article 101206"},"PeriodicalIF":7.9000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Sustainability","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2589234725001356","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Solar-driven evaporation has emerged as a promising approach for sustainable seawater purification. However, most reported methods often suffer from problems such as low efficiency, scaling, and fouling. To address these long-term limitations, this study presents a novel solar evaporator design that separates the evaporation surface from the water pumping column. This design allows the water pumping column to maintain the same salinity and temperature as the bulk seawater, minimizing scaling, fouling and heat loss. The system employs a temperature-responsive hydrogel with aligned pores to facilitate non-powered water transport driven by diurnal temperature fluctuations. Additionally, the design uses a floating graphene composite paper (GCP) evaporation surface that moves with the water level inside the evaporation chamber, automatically adjusting the angle between the evaporation surface and the sun to optimize energy absorption. Experimental results demonstrate that this configuration effectively prevents salt accumulation within the water channels, minimizes heat loss, and achieves enhanced evaporation rates, thereby offering a viable solution for efficient and sustainable seawater purification.
期刊介绍:
Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science.
With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.