The release of soils and impurities from cellulosic surfaces plays a critical role in such processes as the laundering clothes deinking wastepaper pulps. This article reviews publications that provide evidence about factors affect mechanisms by which operate. In general, substrates advantages for contaminants due to their hydrophilic nature permeability, allowing transport surfactants contact i...

Digital printing is being used more and more. Several of these prints end up in the recovered paper collection from households, offices and industry, becoming part of the raw material to be recycled by papermakers. Most printing technologies are well accepted but pose some difficulties with respect to deinkability and paper recycling. Worldwide ; approximately 50 % of the paper is recycled ; Di...

Process waters in deinking mills often feature a strong coloration, due to dyes and pigments released from the recovered paper. This can usually be remediated by pulp bleaching treatment with appropriate chemicals. However, the red shade (from rhodamine dye) is resistant to conventional bleaching treatments. This largely limits the use of deinked pulp in white paper grades. In this review, the ...

this study was aimed to investigate the possibility of using magnesium hydroxide as an alternative for sodium hydroxide in deinking of newsprint and magazine mixture. the old newsprint and magazine mixture (onp/omg -70/30) was treated by magnesium hydroxide at three levels: 1, 1.5 and 2 percent (based on oven dried pulp weight), for 20 min. optical and mechanical properties and effluent cod loa...