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纸浆纤维对钙离子吸附行为及机理

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年01期
Page:
59-63
Column:
研究论文
publishdate:
2010-01-30

Article Info:/Info

Title:
Adsorbing behavior and its mechanism of calcium ions on chemical wood pulp fibers
Author(s):
WANG Zhongliang12 YE Chunhong1 DAI Lu1 YUAN Guangxiang1 DAI Hongqi1*
1.Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China; 2.College Light Industry and Textile, Qiqihar University, Qiqihar 161006, China
Keywords:
chemical wood pulp calcium ion adsorbing mechanism
Classification number :
TS753
DOI:
10.3969/j.jssn.1000-2006.2010.01.013
Document Code:
A
Abstract:
The adsorbing kinetics and the factors of influencing calcium ion adsorption of both deionized BKP hard wood pulp and soft wood pulp were studied in this paper. The results showed that the adsorption capability of pulp fiber rise along with the augment of the beginning consistency of Ca2+ at a low Ca2+ consistency. The saturation adsorption capability of hard wood pulp is 0.016 0 mmol/g at the content of Ca2+ 0.471 7 mmol/L, and the soft wood pulp being 0.008 4 mmol/g at the content of Ca2+ 0.220 1mmol/L, which accords with the carboxyl content of pulps. At the conditions of pH 7.5 and 25 ℃, ce/Q and ce keep excellent linearity relationship, the R2 being respectively 0.95 and 0.99. It indicates the adsorption between pulp fiber and Ca2+ is chemistry adsorption, which accords with Langmuir isothermal equation, also belongs to single molecular adsorption. The adsorption capacity of chemical wood pulp fiber on Ca2+ rise along with pH or content of Ca2+, and the saturated adsorption content of Ca2+ of both BKP hard wood pulp and BKP soft wood pulp is 0035 6 mmol/g and 0.016 5 mmol/g, the pulp being entirety saturated adsorption with Ca2+ after pH 7. Arising temperature will low the adsorption capacity, which belongs to exothermic adsorption between pulp fibers and Ca2+.

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Last Update: 2010-02-09