4.7 Review

Recent Advances in Nanocellulose Aerogels for Efficient Heavy Metal and Dye Removal

Journal

GELS
Volume 9, Issue 5, Pages -

Publisher

MDPI
DOI: 10.3390/gels9050416

Keywords

aerogel; cellulose; pollutant; dyes; heavy metals; water treatment

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Water pollution is a significant environmental problem caused by industrial and economic growth, with human activities such as industry, agriculture, and technology increasing pollutant levels and harming the environment and public health. Organic dyes and heavy metals are major contributors to water pollution, with dyes causing ecological imbalance through increased temperature and heavy metals adding toxic elements to wastewater. Researchers have focused on adsorption, precipitation, and filtration as effective water treatment methods, with adsorption being a simple and inexpensive way to remove organic dyes. Cellulose-based aerogels have shown promise as sustainable and efficient materials for water treatment, with their unique properties and potential for removing dyes and heavy metals.
Water pollution is a significant environmental issue that has emerged because of industrial and economic growth. Human activities such as industrial, agricultural, and technological practices have increased the levels of pollutants in the environment, causing harm to both the environment and public health. Dyes and heavy metals are major contributors to water pollution. Organic dyes are a major concern because of their stability in water and their potential to absorb sunlight, increasing the temperature and disrupting the ecological balance. The presence of heavy metals in the production of textile dyes adds to the toxicity of the wastewater. Heavy metals are a global issue that can harm both human health and the environment and are mainly caused by urbanization and industrialization. To address this issue, researchers have focused on developing effective water treatment procedures, including adsorption, precipitation, and filtration. Among these methods, adsorption is a simple, efficient, and cheap method for removing organic dyes from water. Aerogels have shown potential as a promising adsorbent material because of their low density, high porosity, high surface area, low thermal and electrical conductivity, and ability to respond to external stimuli. Biomaterials such as cellulose, starch, chitosan, chitin, carrageenan, and graphene have been extensively studied for the production of sustainable aerogels for water treatment. Cellulose, which is abundant in nature, has received significant attention in recent years. This review highlights the potential of cellulose-based aerogels as a sustainable and efficient material for removing dyes and heavy metals from water during the treatment process.

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