| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 597559 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2007 | 6 Pages |
Abstract
The single-stage hydrogen peroxide bleaching of recycled de-inked pulps from old newsprint in the laboratory is investigated using Fourier transform infrared photoacoustic spectroscopy (FT-IR-PAS). Intensities relative to three internal standard peaks (3400, 1507, 1060 cm−1) were used to observe significant changes in the 1800–1300 cm−1 region due to chemical changes in the pulps resulting from the peroxide bleaching treatments. The bleaching and alkali treatments caused changes in absorption bands in the 1800–1300 cm−1 region. Variations in the band intensity have been related to changes in pulp brightness and to oxidation of the pulps.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Nishi K. Bhardwaj, Kien L. Nguyen,