RESEARCH OF WASTE PAPER CLEANING METHODS: CHEMICAL REAGENTS AND THEIR IMPACT ON THE QUALITY OF RECYCLING

One of the problems of the paper industry is the search for raw materials. Due to the depletion of non-renewable resources, the role of recycling waste paper, which makes up about 7% of solid municipal waste and contains valuable cellulose, is growing. In developed countries, millions of tons of paper packaging are produced annually, creating large volumes of waste paper [1].

Paper recycling plays a significant role in reducing environmental impacts, reducing waste volumes and minimizing the use of primary resources. However, despite advances in paper recycling, the problem of cleaning up contaminants such as chemicals, paints and pigments remains relevant. These contaminants reduce the quality of recycled material and increase the complexity of the production process. This article reviews modern paper cleaning methods such as the use of surfactants, chemical reagents and combined approaches to improve recycling efficiency. In this study, a set of chemical reagents including sodium dodecyl sulfate (SDS) and sodium hypochlorite were selected to evaluate their impact on paper cleaning. To evaluate the efficiency of waste paper cleaning, physicochemical methods including UV spectroscopy, IR spectroscopy, thermogravimetric analysis and differential thermal analysis were used, which provided comprehensive information on the composition and changes in the material during processing.

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