Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University.
International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS).
J Oleo Sci. 2022 Apr 1;71(4):619-626. doi: 10.5650/jos.ess21396. Epub 2022 Mar 14.
Recycling technology contributes to sustainability and has received considerable interest in fulfilling consumable products' social demands, including papers. Recycled fibers are the primary source of the papermaking industry. Papers, valuable daily used materials, can be further recycled for further implementation. Here, we report a simple method for recycling waste papers for further use. Our method includes re-pulping, deinking, bleaching, and papermaking. The sample and the recycled papers were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). XRD data shows the presence of cellulose and filler minerals in the sample and the recycled papers. FTIR analysis confirmed the presence of hydroxyl, carbonyl, and methyl functional groups in the recycled papers suggesting that the deinking and bleaching did not cause any structural changes. The fibrous structures were also sustained after recycling, as confirmed by SEM studies demonstrating that the recycling was successful and the papers can be further used and recycled. EDS analysis further confirmed the filler minerals in the sample paper with a trace amount of lead, which decreased upon bleaching the paper. The structure and properties of the sample and the recycled papers were quite similar, inferring that waste papers can be recycled again and different products from low to higher grade papers can be fabricated.
回收技术有助于可持续发展，在满足消费品的社会需求方面引起了相当大的关注，包括纸张。再生纤维是造纸工业的主要来源。纸张是有价值的日常使用材料，可以进一步回收利用。在这里，我们报告了一种简单的方法，用于回收废纸以供进一步使用。我们的方法包括制浆、脱墨、漂白和造纸。用 X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和能谱（EDS）对样品和回收纸进行了表征。XRD 数据显示样品和回收纸中存在纤维素和填充矿物。FTIR 分析证实了回收纸中存在羟基、羰基和甲基官能团，表明脱墨和漂白没有引起任何结构变化。回收后的纤维结构也得到了维持，这一点通过 SEM 研究得到了证实，表明回收是成功的，这些纸张可以进一步使用和回收。EDS 分析进一步证实了样品纸中的填充矿物，其中含有微量的铅，而在对纸张进行漂白后，铅的含量有所减少。样品和回收纸的结构和性能非常相似，这表明废纸可以再次回收利用，并且可以从低等级的纸张制造出不同等级更高的纸张。
