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| Effects of Various Pretreatments on the Removal of Ash and Metals Ions of Unbleached Kraft Reed Pulp |
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| DOI：10.11981/j.issn.1000-6842.2013.03.5 |
| Key Words:kraft reed pulp pretreatment; removal rate for metal ions; sodium hexametaphosphate |
| Author Name | Affiliation | | 朴明虎 | 北京林业大学材料科学与技术学院,北京,100083 | | 宋舒苹 | 北京林业大学材料科学与技术学院,北京,100083 | | 郑 雪 | 北京林业大学材料科学与技术学院,北京,100083 | | 蒲俊文* | 北京林业大学材料科学与技术学院,北京,100083 |
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| Abstract: |
| Kraft reed pulp was pretreated by H2SO4, SHMP, DTPA before oxygen delignification, the effects of various pretreatments on the removal of ash and several metal ions were analyzed. The results showed that three pretreatments mentioned above were remarkable to remove ash and transition metals in pulp sample, i.e. with chelating agent DTPA, the removal rates of Fe3+ and Cu2+ were 54.0% and 67.3% respectively, Mn2+, Mg2+, Ca2+ were removed efficiently with H2SO4 pretreatment, and Fe3+ was removed selectively by using SHMP and meanwhile, acid-insoluble ash and alkali metal ions were retained considerably, thus it could be the optimum pretreatment agent for oxygen delignification． |
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