Removal of transition metals from alkaline suspensions of cellulose pulp using CDTA as chelating agent

Removal of transition metals (Fe, Mn, and Cu) from oxygen delignified alkaline cellulose pulp slurry was carried out using CDTA ( trans-cyclohexane-1,2-diaminetetraacetic acid) as chelating agent. After simple treatment in alkaline solutions the initial natural concentrations of the metals above-men...

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Bibliographic Details
Published in:Carbohydrate polymers 2006-11, Vol.66 (3), p.316-320
Main Authors: Norkus, Eugenijus, Vaičiūnienė, Jūratė, Vuorinen, Tapani
Format: Article
Language:English
Subjects:
Applied sciences
CDTA
cellulose
Cellulose pulp
Chelating agents
chelation
chemical concentration
copper
Exact sciences and technology
ions
iron
manganese
metals
oxygen bleaching
paper pulp
Paper, paperboard, non wovens
Polymer industry, paints, wood
Pulp manufacturing
Removal
trans-cyclohexane-1,2-diaminetraacetic acid
transition elements
Transition metal ions
wood pulp
Wood. Paper. Non wovens
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Summary:Removal of transition metals (Fe, Mn, and Cu) from oxygen delignified alkaline cellulose pulp slurry was carried out using CDTA ( trans-cyclohexane-1,2-diaminetetraacetic acid) as chelating agent. After simple treatment in alkaline solutions the initial natural concentrations of the metals above-mentioned can by reduced by ca. 50% for Fe and Mn and by ca. 70% for Cu, whereas the lowering of concentration of Ca varies in the range from 30% to 60%, depending on solution pH and concentration of chelating agent.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2006.03.018