Abstract
Fall leaves are biodegraded and composted naturally in forests but they are wastes for urban areas. Moreover, they are widely available cellulose sources but have limited applications. Alkaline peroxide treatment of bioresources is one of the most widely studied clean methods for both delignification and hemicellulose removal but there is no study about application of that method on fall leaves at room temperature. In this study, the effect of alkaline peroxide treatment of fall leaves at room temperature on hemicellulose recovery and cellulose delignification were investigated. Fall leaves (FL) were treated with 0.3-3.0 M NaOH + 0-3 M H2O2 at room temperature. Hemicellulose recovery and cellulose delignification values were analyzed. Hemicellulose recovery and cellulose delignification increased and yield decreased by increasing NaOH and H2O2 concentrations. Hemicellulose recovery and cellulose delignification reached to the maximum levels, 99.5% and 81.6% respectively, at 3M NaOH + 3M H2O2 treatment condition. The end products were confirmed by analytically, spectrally and morphologically. Wasted fall leaves were turned into useful hemicellulose and cellulose products by using clean alkaline peroxide treatment at room temperature. The products can be further processed by known methods into other industrial products.
Highlights
Fractionalization of plants into cellulose, hemicellulose and lignin presents many industrial opportunities
Cellulose and hemicellulose contents of the samples were determined via acid detergent fibre (ADF) and neutral detergent fibre (NDF) calculations (Huang et al, 2010)
Fall leaves (FL) were treated with 0.3-3.0 M NaOH + 0-3 M H2O2 at room temperature for isolation of cellulose and hemicellulose
Summary
Fractionalization of plants into cellulose, hemicellulose and lignin presents many industrial opportunities. Cellulose and hemicellulose are very important natural raw materials used in many areas of our life, from textiles to food, from construction to paint industries Liu et al, 2005) These raw materials can be composited with other materials to make new products (Ünlü et al, 2009). Alkaline peroxide treatment is one of the cleanest fractionalization methods using clean, odorless and recyclable chemicals (Su et al, 2015). Operation at moderate temperature and pressure made hydrogen peroxide treatment one of the most widely studied analytical methods for fractionalization of lignocellulosic bioresources
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