article · Journal of environmental chemical engineering
Heavy metal pollution in water presents serious risks to human health and ecosystems, while conventional treatment methods often suffer from high costs, heavy energy use, and toxic by-product generation. Adsorption using abundant, renewable, and biodegradable biomaterials offers a sustainable alternative for water purification. Cellulose serves as an effective substrate because its surface is rich in hydroxyl groups, enabling chemical modifications that introduce specific functional groups. These synthetic adjustments fine-tune structural features, porosity, surface area, and chemical stability to improve adsorption capacity and selectivity for targeted toxic metal cations. Furthermore, chemical tailoring enhances material robustness, facilitating recovery, regeneration, and reuse across multiple cycles. By harnessing naturally widespread cellulose, these modified adsorbents provide an environmentally friendly and cost-effective route for capturing hazardous heavy metal ions from wastewater.
Heavy metal contamination in water threatens ecosystems and human health, yet standard clean-up approaches are often costly and resource-intensive. Using modified cellulose offers an affordable, non-toxic, and renewable solution. Improving the efficiency and reusability of such bio-based adsorbents can lead to cleaner, lower-impact water treatment processes that reduce reliance on hazardous chemicals and energy-heavy purification techniques.
The outlined synthetic strategies could enable the development of tailored, reusable filtration media for industrial wastewater treatment facilities and water purification plants. The primary target users are operators seeking low-cost, sustainable materials to capture toxic metal cations. Because the abstract describes a literature review of synthetic strategies rather than a deployed technology, the work reflects early-stage research that requires further validation before direct commercial implementation.
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Pollution caused by heavy metals poses a global threat to both human health and ecosystems. While there are existing methods to address this issue, it is essential to acknowledge their drawbacks: high cost, substantial energy requirements, and the generation of toxic waste. Consequently, the scientific community is strongly dedicated to developing more efficient, cost-effective, and environmentally friendly approaches. Among these, adsorption has emerged as a powerful, green, and sustainable method for water purification. Specifically, non-toxic biomaterials like cellulose-based adsorbents have garnered significant interest in the field. The surface of cellulose is enriched with numerous hydroxyl groups, enabling the incorporation of chemical moieties that enhance adsorption capabilities for toxic metal cations. Cellulose's high chemical versatility allows for its modification through various synthetic approaches, enabling fine-tuning of its structural properties. Combined with its intrinsic properties, such as porosity, surface area, and chemical stability, this makes cellulose an excellent substrate for developing adsorbents with enhanced capabilities for metal cation removal. Modifying cellulose-based adsorbents can improve and tailor their adsorption capacity and selectivity towards specific toxic metal cations, as well as their robustness, allowing for recovery, regeneration, and reusability. Additionally, the widespread availability of cellulose in nature enhances the cost-effectiveness and reduces the environmental impact of developing novel adsorbent materials. In this paper, we present a comprehensive and up-to-date literature review that highlights the remarkable progress on synthetic strategies used to obtain cellulose-based adsorbents and their application in wastewater treatment, particularly focusing on the removal of heavy metal ions. • Pollution caused by heavy metals poses a global threat to both human health and ecosystems. • Cellulose-based adsorbents offer a promising solution for addressing environmental pollution challenges. • Cellulose-base adsorbents are effective and versatile to remove metal cations. • Cellulose modification allows to enhance adsorption capacity and selectivity. • Cellulose-based adsorbents are eco-friendly, abundant, renewable, and biodegradable.
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DOI: 10.1016/j.jece.2024.113870
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