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Coir Fiber as a Sustainable Alternative to Polypropylene Water Filters: A Comparative Review
Summary
This review paper takes a close look at coconut fiber (coir) as an eco-friendly swap for the plastic (polypropylene) typically used in water filter cartridges, pulling together existing research rather than presenting new experiments. The big appeal: coir is renewable, biodegradable, and effective at filtering water, so using it could cut down on plastic waste and reduce the amount of microplastic that ends up shedding into your drinking water or the environment. That said, the researchers note there's still more work to be done before coir filters are ready to fully replace plastic ones on a large scale.
Access to safe drinking water remains a major global challenge due to increasing contamination from industrialization, agricultural activities, and urbanization. Conventional water filtration systems commonly utilize polypropylene (PP) filter cartridges owing to their low cost and ease of manufacturing. However, the non-biodegradable nature of polypropylene contributes significantly to environmental pollution and plastic waste generation. Consequently, there is growing interest in the development of sustainable and eco-friendly filtration materials derived from natural resources. Among various natural fibers, coir fiber has emerged as a promising candidate due to its abundance, biodegradability, low cost, high lignin content, and excellent durability in aqueous environments. This review critically evaluates the potential of coir fiber as an alternative filtration medium for water purification applications. The physical, chemical, and mechanical properties of coir fibers are discussed and compared with conventional polypropylene filtration materials. Various fiber modification techniques, filtration mechanisms, environmental impacts, and sustainability considerations are reviewed. Existing research gaps and future directions for the development of coir-based filtration composites are also highlighted. Furthermore, the adoption of coir fiber-based filtration systems aligns with the objectives of the United Nations Sustainable Development Goals (SDGs), particularly SDG 6 (Clean Water and Sanitation), SDG 12 (Responsible Consumption and Production), SDG 13 (Climate Action), and SDG 15 (Life on Land), by promoting sustainable water treatment technologies, reducing plastic waste, supporting circular bioeconomy practices, and minimizing environmental impacts associated with conventional filtration materials