Search

The use of cheap adsorbent has been studied as an alternative substitution of activated carbon for the adsorption of the organic pollutant from aqueous solution. In the present study, the effect of contact time, pH, initial concentration of humic acid, and temperature was tested for investigation of the humic acid removal efficiency of the feather protein granule as a low-cost adsorbent. The equilibrium time was 120 min. It was found that the removal efficiency depended on pH and the highest removal was 68.3 % at pH of 3.0. The equilibrium adsorption data fitted with linear of Freundlich and Langmuir isotherm models. The thermodynamic studies revealed the endothermic and spontaneous process in 298ºC. The feather protein granules were successfully used for the adsorption of humic acid from aqueous solution. [ABSTRACT FROM AUTHOR]

• FP- g -PSAS is prepared by building an APS/-SH groups redox system and characterized. • FP- g -PSAS shows strong adhesion to viscose and cotton fibers at 60 °C. • FP- g -PSAS as a new adhesive fulfills high-valued utilization of feather waste. • FP- g -PSAS can be used as a new bio-based protein sizing agent. Fulfilling high-valued utilization of feather wastes will favor overcoming environmental issues and promoting the poultry farmers' income. This study developed a new bio-based protein sizing agent [feather protein- g -poly(sodium allyl sulfonate) (FP- g -PSAS)] with high adhesion capacity to viscose and cotton fibers at low temperature, through graft copolymerization of feather protein with SAS monomer by building an ammonium persulfate (APS)/ SH groups (on the protein chains) redox system. Fourier transform infrared (FTIR) spectroscopy and energy dispersive x-ray spectrometer (EDS) demonstrated the successful preparation of FP- g -PSAS samples. The samples were also characterized by scanning electron microscopy (SEM), thermogravimetric (TG) and x-ray diffraction (XRD). Viscosity, water-solubility, light transmittance and adhesion of the samples were investigated. The FP- g -PSAS exhibited high water-solubility and light transmittance. Compared with feather protein, an increased viscosity and an improved adhesion to both fibers for FP- g -PSAS samples were exhibited at 60 °C. With the rises in grafting ratios, viscosity and adhesion strengths to both fibers gradually increased. The FP- g -PSAS samples had the similar adhesion strengths in comparison with the modified starches investigated in our previous works. These results indicated that FP- g -PSAS showed the potential in the application of viscose and cotton warp sizing at a low temperature of 60 °C. [ABSTRACT FROM AUTHOR]

In this study, feather was used as the source of protein and combined with copper and boron salts to prepare wood preservatives with nano-hydroxyapatite or nano-graphene oxide as nano-carriers. The treatability of preservative formulations, the changes of chemical structure, micromorphology, crystallinity, thermal properties and chemical composition of wood cell walls during the impregnation and decay experiment were investigated by retention rate of the preservative, Fourier transform infrared spectroscopy (FT-IR), scanning electronic microscopy-energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD), thermoanalysis (TG), and confocal Raman microscopy (CRM) techniques. Results revealed that the preservatives (particularly with nano-carrier) successfully penetrated wood blocks, verifying the enhanced effectiveness of protein-based preservative with nano-carrier formulations. Decay experiment demonstrated that the protein-based wood preservative can remarkably improve the decay resistance of the treated wood samples, and it is an effective, environmentally friendly wood preservative. Further analysis of these three preservative groups confirmed the excellent function of nano-hydroxyapatite as a nano-carrier, which can promote the chelation of preservatives with higher content of effective preservatives. [ABSTRACT FROM AUTHOR]