استفاده از ضایعات حاصل از هرس درخت کنوکارپوس (Conocarpus erectus) برای تولید خمیر و کاغذ

Abstract

Background and Objective: due to raw materials shortage for lignocellulosic industries, Conocarpus erectus pruning residue can be considered as an alternative raw material. Method: In the present study, the uses of different parts of the Conocarpus residues for soda pulp production and papermaking were evaluated. Findings: The results showed that different parts of the Conocarpus residues have completely different properties, so that the leaves with the highest content of extractives, lignin and ash and lowest amount of cellulose and hemicellulose gave pulp with lowest screened yield and highest kappa number that was not suitable for paper production due to very low freeness and high drainage time. In contrast, the branch with the highest amount of cellulose and hemicellulose and lowest amount extractive materials, lignin and ash produced pulp with highest screened yield, freeness and lowest kappa number and drainage time. Also, in Compared to leaf- branch, pulp from branch produced paper with higher thickness, light scattering coefficient and tear but lower tensile and appear density.Discussion and Conclusion: In general, leaves and branches residue of Conocarpus compared to other lignocellulosic materials such as wheat straw and bagasse, which is widely used in the pulp and paper industry, due to qualitative properties reasons are not suitable in pure form for use in pulp and paper industries but are recommended to evaluation as the mixing with the recycled pulp.