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首页> 外文期刊>Journal of Wood Chemistry and Technology >Acid Hydrogen Peroxide Treatment of Norway Spruce TMP: The Effect of an Extended pH Range when Catalyzed by Free Ferrous and Free or EDG/EDTA-Chelated Ferric Ions
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Acid Hydrogen Peroxide Treatment of Norway Spruce TMP: The Effect of an Extended pH Range when Catalyzed by Free Ferrous and Free or EDG/EDTA-Chelated Ferric Ions

机译：酸性过氧化氢处理挪威云杉TMP：游离亚铁和游离或EDG​​ / EDTA螯合的铁离子催化时，pH值范围扩大的影响

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摘要

The influence of different types of iron salts (i.e.,ferrous or ferric cations with sulphate, nitrate or chloride anions) on the reaction between coarse thermomechanical pulp and acid hydrogen peroxide (Fenton chemistry) was studied when the initial pH was 3.2 and 5.3. Also, ferric ions chelated with EDTA or EDG at different molar ratios were compared with ferrous sulphate when the initial pH was extended from about 3 to 8. Different anions of ferric ion salt gave a similar catalytic effect. At an initial pH of 7-8, theferric-EDTA catalyzed reaction resulted in similar or higher hydrogen peroxide consumption and more detectable hydroxyl radicals than the ferrous sulphate catalyzed reaction, but less reaction with the pulp was indicated. Between pH 5-8, using Fe-EDG as a catalyst gave higher hydrogen peroxide consumption and more detectable hydroxyl radicals than if using ferrous sulphate; however, the measured effect on the pulp was similar or less.
机译：当初始pH值为3.2和5.3时，研究了不同类型的铁盐（即带有硫酸根，硝酸根或氯离子的亚铁或铁阳离子）对粗热机械纸浆与酸性过氧化氢之间反应的影响（芬顿化学）。同样，当初始pH从约3扩展到8时，将以不同摩尔比与EDTA或EDG螯合的铁离子与硫酸亚铁进行了比较。不同的铁离子盐阴离子具有相似的催化作用。在初始pH为7-8时，铁-EDTA催化的反应比硫酸亚铁催化的反应导致相似或更高的过氧化氢消耗和更多的可检测羟基自由基，但表明与纸浆的反应较少。在pH 5-8之间，与使用硫酸亚铁相比，使用Fe-EDG作为催化剂可产生更高的过氧化氢消耗量和更多的可检测羟基自由基。然而，测得的对纸浆的影响相似或更少。

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