Use of Lignocellulose Materials as Sorption Media for Phosphorous Removal

摘要

By-products from agricultural and wood industries constitute the most abundant renewable resources available worldwide. Among these by-products, bark constitutes a significant portion of mill residues. For example, in 1996 approximately 24.5 million dry tons of bark residues were generated, of which 19.2 million tons were used as fuel, 4.53 million tons in miscellaneous by-products, 0.117 million tons in fiber by-products, and 0.638 million tons were not used. Bark could be an important renewable source of raw material for the chemical industry, but its widespread use is still hindered by lack of adequate technologies for separating its components into pure chemical fractions. Hence, bark is predominantly used as a low-grade thermal fuel or as landscaping mulch. Recently, there has been renewed interest in developing environmentally friendly products from bark including panel boards; polyphenols and adhesives; water-repellent formulations for wood products; and biodegradable polyurethane foams.