The results have shown a good adsorption capacity toward methylene blue (Etim et al., 2016). Natural fibers, such as bamboo, flax, hemp, and coir, are usually different in terms of microstructure and chemical composition. Among all the heavy metals, Cd showed the highest leaching potentials, whereas Cu, Ni, and As showed the lowest. On the other hand, the structural parameters and physical properties of coir fibers also accompany disadvantages in the processing techniques. The individual fiber cells are narrow and hollow, with thick walls made of cellulose. The laboratory result reveals that both fibres are effective in increasing the Marshall stability of the ordinary HMA. Environmental benefitsCoir is a material which is widely used to overcome the problem of erosion. Primarily, coco coir holds a substantial amount of water, holding almost ten times its own weight in moisture. Especially the shells were fully utilized as a combustion source fuel, a potential alternative fuel for diesel engine or fertilizer (Wever et al., 2012; Tiryaki et al., 2014). The other method of extraction of coir fibers is by decorting of dry husks. Source: P277, Bast and other plant fibres, Woodhead Publishing. Integrated farm level processing as a community/cooperative approach would help to facilitate greater availability of technology to process the husk and extract the fibre in volumes needed for industrial buyers. The thickness of coir fibre limits the products made by coir being coarser and heavier. Hard to Overwater Globally around 650 000 tonnes of coir are produced annually, mainly in India and Sri Lanka. The fibrous husks are suspended in water for about ten months during which the microorganisms break down the plant tissues and loose fibers are formed. And then the fibers … By considering the spectrum of untreated coir fiber as the reference to verify the effectiveness of the treatments carried out on the fiber, for the spectrum of alkalinized fibers, for the appearance of new bands such as a 1050-cm−1 bond bound to a C–H stretching vibration of the cellulose backbone and a 1340-cm−1 bond to crystalline cellulose, 1650 cm−1 corresponds to the presence of lignin C=C, 2900 cm−1 bonded to an ester bond, and the bad 3330 cm−1 related to the presence of hydroxyl groups (–OH). By products The waste product from milling the coir is peat or pith which makes for high quality mulch and fertilizer. Coir is known for its water retention properties, but it also allows for proper drainage and prevents water logging of plant roots, reducing the chance for root rot. Coconuts are typically grown by small-scale farmers, who use local mills for fibre extraction. The coir fiber is relatively waterproof and is one of the few natural fibers resistant to damage by salt water. Poor interfacial strength between the coir fiber and matrix was the main issue of lower strength properties (Harish et al., 2009). This was suggested by a researcher that the remaining lignin content is still sufficient to cover the fiber surface, showing that the excess lignin content has no effect on composite properties. This showed that the random arrangement of coir fiber in the matrix are not improving the composite’s strength (Monteiro et al., 2008). They were boiled for 2 hours to extract the following water soluble chemicals : sugar, starch, fat, tannins, resin, quinines phenols and hemi cellulose. Incorporating coir fibers into the matrix requires a surface treatment beforehand, which renders it hydrophobic. 6.5 illustrates the spectra of raw coir fiber, alkalized fiber, and bleached fiber. Coir fiber is one of the most lignin-rich natural fibers (Gu, 2009). The coconut fibers were added at 5% and the coconut fiber ash at 15% in the concrete mix.
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