publication . Article . 2010

IMPACT OF ACID WASHING AND CHELATION ON Mg(OH)2-BASED HYDROGEN PEROXIDE BLEACHING OF MIXED HARDWOODS CMP AT A HIGH CONSISTENCY

Somayeh Ghasemi; Rabi Behrooz; Pedram Fatehi; Yonghao Ni;
Open Access English
  • Published: 01 Sep 2010 Journal: BioResources (issn: 1930-2126, Copyright policy)
  • Publisher: North Carolina State University
Abstract
The removal of transition metal ions is crucial for improving the efficiency of subsequent peroxide bleaching. Acid-washing and chelation have been proposed for such a purpose. However, their influences on the Mg(OH)2-based peroxide bleaching of hardwood pulps at a high consistency have not been well documented in the literature. In this work, we studied the influence of acid-washing using sulfuric acid or chelation using diethylenetriaminepentaacetic (DTPA) on the Mg(OH)2- or NaOH-based hydrogen peroxide bleaching efficiency, effluent properties of bleaching filtrates, and paper properties. The results showed that for Mg(OH)2-based peroxide bleaching, the pulp ...
Subjects
Medical Subject Headings: stomatognathic diseasesstomatognathic systemgenetic structuressense organs
free text keywords: Acid washing, DTPA chelation, Peroxide bleaching, CMP, Hardwood, Mg(OH)2, NaOH, Biotechnology, TP248.13-248.65
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Article . 2010
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