Ion Exchange of H , Na , Mg2 , Ca2 , Mn2 , and Ba2 on Wood Pulp

• Published in: Journal of wood chemistry and technology Vol. 26; no. 3; pp. 259 - 272
• Main Authors: Rudie, A.W, Ball, A, Patel, N
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis Group 01-09-2006; Taylor & Francis
• Subjects: Applied sciences; barium; bleaching; calcium; cations; chemical bonding; divalent cations; Exact sciences and technology; hydrogen; ion exchange; ion exchange selectivity coefficients; ions; magnesium; manganese; metals; monovalent cations; Paper, paperboard, non wovens; pine; Polymer industry, paints, wood; processing technology; pulp and paper technology; pulp fiber; Pulp manufacturing; selectivity coefficients; sodium; solutions; Wood fiber; wood pulp; wood technology; Wood. Paper. Non wovens; pine; Wood fiber; monovalent cations; Paper pulp; ion exchange; selectivity coefficients; divalent cations
• ISSN: 0277-3813; 1532-2319
• DOI: 10.1080/02773810601023503

Ion exchange selectivity coefficients were measured for the partition of metals between solution and pulp fibers. The method accurately models the ion exchange isotherms for all cation pairs evaluated and is accurate up to approximately 0.05 molar concentrations. Selectivity coefficients were determined for calcium and magnesium with each other and with hydrogen, sodium, manganese, and barium. Measurements made at 25°, 50°, and 65°C were used to determine the enthalpy and entropy of the reactions. The data follow the expected linear free-energy relationship. These results can be used to estimate the ion exchange selectivity coefficients for any temperature within the experimental range.