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- W2494916920 abstract "Methylene blue (MB) sorption can be used to determine anionic groups (AGs) in chemical, chemimechanical, and mechanical pulps. Fast sorption performed in 5 min under vigorous agitation gave similar results as obtained using 20 h sorption time, with no observed effects of AG counter ions. The MB sorption isotherm showed different plateaus according to the amount of free MB in solution. We also identified regions related to chemisorption and physisorption. For analytical purposes, the saturation level in the chemisorption process must be the target for performing MB sorption. The isotherm in the chemisorption region for this study was of the Langmuir type, according to experimental data fitting and as observed by X-ray photoelectron spectroscopy (XPS) analyses. Based on our results, we suggest that pulp and paper mills can use MB sorption as a fast and reliable method applied to on line and at-line process control. Application: Anionic groups in pulps can be determined for process control in pulp and paper mills using at-line or on-line conditions." @default.
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- W2494916920 date "2003-01-01" @default.
- W2494916920 modified "2023-09-23" @default.
- W2494916920 title "Fast determination of anionic groups in different pulp fibers by methylene blue sorption" @default.
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