Optimizing Mixed Waste Paper Properties Through Formamidine Sulfinic Acid Bleaching and Cationic Additive Treatments

IF 4.7 3区工程技术 Q2 ENGINEERING, ENVIRONMENTAL Journal of Polymers and the Environment Pub Date : 2024-09-28 DOI:10.1007/s10924-024-03411-5

Sima Sepahvand, Iman Akbarpour, Alireza Ashori

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Abstract

This study investigated the synergistic effects of formamidine sulfinic acid (FAS) bleaching and cationic additives on mixed waste paper (MWP) quality. MWP was chemically deinked and bleached with hydrogen peroxide (H₂O₂) or FAS at concentrations of 1–4%. Cationic starch and cationic polyacrylamide (CPAM) were applied as dry-strength additives at 1–3%. FAS bleaching at 4% dosage outperformed H₂O₂, improving brightness by 17% and reducing yellowness by 56%. CPAM showed superior performance in enhancing paper strength properties compared to cationic starch, with an optimal concentration of 2% for both additives. Surface charge analysis demonstrated effective fiber negative charge neutralization by both additives, with CPAM exhibiting higher efficiency. Field emission scanning electron microscopy (FESEM) confirmed significant improvements in fiber surface characteristics, particularly with 2% CPAM and 4% FAS combination. Water retention value decreased with additive application, potentially improving dewatering efficiency. Results indicate that combining FAS bleaching with optimized CPAM dosage can significantly enhance recycled paper quality, potentially narrowing the gap between recycled and virgin pulp properties.

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甲脒亚磺酸漂白和阳离子添加剂处理优化混合废纸性能

研究了甲脒亚磺酸（FAS）漂白和阳离子助剂对混合废纸（MWP）质量的协同作用。用浓度为1-4%的过氧化氢（H2O2）或FAS对MWP进行化学脱墨和漂白。采用阳离子淀粉和阳离子聚丙烯酰胺（CPAM）作为干强添加剂，添加量为1 ~ 3%。4%投加量的FAS漂白效果优于H2O2，漂白亮度提高17%，黄度降低56%。与阳离子淀粉相比，CPAM在增强纸张强度性能方面表现出优异的性能，两种添加剂的最佳浓度均为2%。表面电荷分析表明，两种添加剂都能有效中和纤维负电荷，其中CPAM的效率更高。场发射扫描电镜（FESEM）证实了纤维表面特性的显著改善，特别是2% CPAM和4% FAS的组合。随着添加剂的使用，保水值降低，可能提高脱水效率。结果表明，FAS漂白与优化的CPAM用量相结合，可显著提高再生纸质量，缩小再生纸浆与原浆性能之间的差距。

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来源期刊

Journal of Polymers and the Environment 工程技术-高分子科学

CiteScore

9.50

自引率

7.50%

发文量

297

审稿时长

9 months

期刊介绍： The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.