Effect of Temperature and pH on Deinking of Laser-Jet Waste Paper Using Commercial Lipase and Esterase

Abstract

Waste paper recycling has increased dramatically in recent times, and will continue to do so in the foreseeable future. Ink removal constitutes one barrier to converting this raw material into quality products. Enzymatic deinking represents one approach to lowering this barrier. Enzymatic processing, offers potential opportunities for changing the pulp & paper industry towards more environmentally friendly and efficient operations compared to conventional methods. The study addresses two (2) commercial enzymes (lipase and esterase) for their efficiency and suitability used in deinking of laser-printed paper and how their sequences can facilitate the best result of the deinking process. Results revealed that both are with great potential with lipase is superior to the esterase in the deinking of laser printed paper. 

Fabrication and Performance of Self-Supported Flexible Cellulose Nanofibrils/Reduced Graphene Oxide Supercapacitor Electrode Materials

“…After the films have been fabricated, the CNFs embed into the reduced graphene oxide (RGO) nanosheets to restrain their accumulation. In addition, the hydrophilicity, porosity, and hydroexpansivity of CNFs may be propitious to offer enough diffusion channels for the electrolyte solution and to enhance the contact between electrodes and electrolytes, which may reduce the internal resistance and charge transfer obstruction [34][35][36][37]. In return, the electrochemical performance of the RGO is greatly improved.…”

Application of Nanotechnology in Wood-Based Products Industry: A Review

“…It requires good electrochemical performance and flexibility especially for preparing a high-performance flexible supercapacitor. Him et al [ 261 ] and Zhe et al [ 262 ] found that graphene and nanocellulose are excellent flexible electrode materials for supercapacitors. Nanocellulose has been used as a substrate material because of its good biodegradability, mechanical strength, flexibility, and chemical reactivity.…”

“…This is because nanocellulose can provide an effective way for ion transport. The high pore structure and hydrophilic properties of nanocellulose make it easier to transport electrolyte ion [ 261 ].…”