Boosting extraction of Pb in contaminated soil via interfacial solar evaporation of multifunctional sponge

IF 10.7 1区工程技术 Q1 CHEMISTRY, PHYSICAL

Green Energy & Environment Pub Date : 2023-10-01 DOI:10.1016/j.gee.2022.03.002

Pan Wu, Xuan Wu, Yida Wang, Jingyuan Zhao, Haolan Xu, Gary Owens

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引用次数: 5

Abstract

Interfacial solar water evaporation is a reliable way to accelerate water evaporation and contaminant remediation. Embracing the recent advance in photothermal technology, a functional sponge was prepared by coating a sodium alginate (SA) impregnated sponge with a surface layer of reduced graphene oxide (rGO) to act as a photothermal conversion medium and then subsequently evaluated for its ability to enhance Pb extraction from contaminated soil driven by interfacial solar evaporation. The SA loaded sponge had a Pb adsorption capacity of 107.4 mg g⁻¹. Coating the top surface of the SA sponge with rGO increased water evaporation performance to 1.81 kg m⁻² h⁻¹ in soil media under one sun illumination and with a wind velocity of 2 m s⁻¹. Over 12 continuous days of indoor evaporation testing, the Pb extraction efficiency was increased by 22.0% under 1 sun illumination relative to that observed without illumination. Subsequently, Pb extraction was further improved by 48.9% under outdoor evaporation conditions compared to indoor conditions. Overall, this initial work shows the significant potential of interfacial solar evaporation technologies for Pb contaminated soil remediation, which should also be applicable to a variety of other environmental contaminants.

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多功能海绵界面太阳能蒸发促进污染土壤中铅的提取

界面太阳能蒸发是加速水蒸发和污染物修复的可靠方法。考虑到光热技术的最新进展，通过在海藻酸钠（SA）浸渍的海绵上涂覆还原氧化石墨烯（rGO）表面层作为光热转换介质，制备了一种功能性海绵，随后评估了其在界面太阳能蒸发驱动下增强从污染土壤中提取铅的能力。SA负载海绵的Pb吸附能力为107.4 mg g−1。在SA海绵的顶部表面涂上rGO，在一次阳光照射和2 m s−1的风速下，土壤介质中的水分蒸发性能提高到1.81 kg m−2 h−1。在连续12天的室内蒸发测试中，在1个太阳光照下，Pb的提取效率比没有光照的情况下提高了22.0%。随后，与室内条件相比，在室外蒸发条件下，Pb提取率进一步提高了48.9%。总体而言，这项初步工作显示了界面太阳能蒸发技术在铅污染土壤修复方面的巨大潜力，该技术也应适用于各种其他环境污染物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Green Energy & Environment Energy-Renewable Energy, Sustainability and the Environment

CiteScore

16.80

自引率

3.80%

发文量

332

审稿时长

12 days

期刊介绍： Green Energy & Environment (GEE) is an internationally recognized journal that undergoes a rigorous peer-review process. It focuses on interdisciplinary research related to green energy and the environment, covering a wide range of topics including biofuel and bioenergy, energy storage and networks, catalysis for sustainable processes, and materials for energy and the environment. GEE has a broad scope and encourages the submission of original and innovative research in both fundamental and engineering fields. Additionally, GEE serves as a platform for discussions, summaries, reviews, and previews of the impact of green energy on the eco-environment.