Aluminium Sulphate Report

Cationic rosin has many uses in papermaking; however, its performance as an internal sizing agent differs depending on the circumstance, especially in the recycling of pulps. In this study, a comprehensive laboratory approach was used to investigate the process variables affecting the cationic rosin application in the paper recycling process. In this respect, four levels of alum (0.5, 1.0, 1.5, and 2.0%) and four levels of cationic rosin (0.5, 1.0, 1.5, and 2.0%) were considered to find the best alum/cationic rosin combination in acidic conditions (pH 5). After considering all aspects of the paper, such as the mechanical properties (tensile, burst, and tear indices), wet resistance (Cobb test and dynamic contact angle test), and chemical usage (economically and environmentally-friendly procedures), the 1.0% alum and 0.5% cationic rosin levels were selected for optimum performance. This research also showed that the combined effect of alum with cationic rosin was favorable. Moreover, the sequence of alum and cationic rosin addition, which is a challenge in paper mills, also should be considered. The results indicated that the addition of cationic rosin after alum obtained the best mechanical and wet resistance results. In addition, the results showed that both acidic and neutral pH were acceptable in this sizing process.

Currently production integrated environmental protection is one of the key topics in the pulp & paper industry. This guide-book on best available techniques (BAT) in the pulp and paper industry reflects the information exchange carried by different European experts. This guide-book gives a general overview on processes in the pulp and paper industry, its typical effluents, and available techniques of treatment, especially water. In terms of an efficient environmental protection strategy right from the design or planning stage this guide book should be considered very seriously. It is also very essential in process design and should also be observed more carefully for future technical solutions. This guide-book is an addition to the Reference Document on best available techniques in the pulp and paper industry which reflects the results from an exchange of information according to Article 16(2) of Council Directive 96/61/EC. The Best Available Techniques Reference Documents (in short: BR...

Desalination, 2011

Journal of Toxicology and Environmental Health-part B-critical Reviews, 2007

Note: This article was originally published with an incorrect version of the Acknowledgments, which appeared on p. 218 of the print version. The correct version of the Acknowledgments appeared on pp. 1–2. The corrected article is available below.

Journal of Hazardous Materials, 2010

Chemical Engineering Research Bulletin, 2010