Pulp is then sieved to remove plastic bits and glue globs by mans of mechanical screening process. The distinctive colour of pulp in the recycling process is washed away in the process of deinking. Using enzymes such as cellulose Novozyme 342 and amylase Novozyme helps in losing the ink from paper fibres. The use of these enzymes helps in improving the removal and extent rate of the ink on the
LITERATURE REVIEW INTRODUCTION This chapter covers the gold cyanidation process (Carbon in Pulp), the chemistry and kinetics of leaching, phenomena in gold leaching and the factors affecting leaching phenomena. THE CARBON IN PULP PROCESS The carbon-in-pulp (CIP) process, which was developed to its present form in South Africa during the 1970s, is considered to be the most significant advance in gold recovery technology in recent years. Using CIP, the minute (but economically important) quantity of gold that remained in the barren solutions and solid residues from conventional processing can be recovered. In the CIP process, activated carbon is used to adsorb the gold directly from the cyanided pulp in a series of large adsorption tanks. Pulp flows continually from the first vessel to the last in the series, and the carbon is transferred intermittently by pumping in the opposite (countercurrent) direction.
The coffee wastes which are washed under distilled water are spread evenly on a tray which are then placed into an oven at a temperature of 105OC for a total time of 24 hours. The coffee wastes are then crushed by using a home blender. The resulting particles are then sieved and these samples are used for the rest of the experimental work. Based on the literature, the particle sizes of raw materials used in the production of activated carbon from coffee wastes are generally in the range of 0.2-2 mm. Due to the heterogeneous physical structure of the coffee wastes, smaller size particles of coffee wastes are preferred.
These type of toxic materials are not only in the demolition of biodiversity but also the degradation of human health. Pollution levels that are increasing day by day need better developments or technological discoveries immediately. Photocatalytic degradation is a new developing technique for remediation of pollutants using various nanoparticles. The present review speculates on various nanoparticles which are useful for degradation of azo dye- Congo red. Keywords: Photocatalytic Degradation, nanoparticles, Congo red.
PREPARATION AND CHARACTERIZATION OF POROUS CERAMIC MEMBRANES FOR MICRO-FILTRATOIN FROM CLAY/CUZN USING EXTRUSION METHODS In this study, fabrication and characterization of ceramic membranes preparation was carried out. Porous ceramic membranes were fabricated by extrusion process from different percentage composition of CuZn on (80 wt% Clay, 10 wt% TiO2, 5 wt% Carbon and 5 wt% PVA). The fabricated membranes were sintered at 900oC for 1 hour in an electrical box furnace with heating rate 1oC/min and holding time for 1 hour. Apparent density and porosity were determined by standard methods for ceramic materials. Phase composition of the ceramic support was established by X-Ray Diffraction analysis.
A higher melting point PE fabric is reinforced with a lower melting point PE matrix by a process called ‘Overheating’. In this process the fiber and matrix is arranged properly and heated to a temperature that is higher than the melting temperature of matrix but lower than that of the fiber. This ensures that matrix is formed properly leaving the fiber intact. The interfacial properties of the composites have a vital role in determining the laminate level mechanical properties of the composites. Tiny melted blobs of PE matrix material are deposited on a bundle of PE fibers
Seaweed mainly from the family of brown, red, green and blue algae are used for the manufacture of sea cell fibers. Coarse crushed seaweed material is processed to fine seaweed powder by specialized milling technology. The seaweed/algae are added either as a powder form or as suspension in one of process steps preceding the spinning of the cellulose solution. In the Lyocell process, the cellulose is dissolved directly without formation of derivatives, as the solvent used is nontoxic, aqueous solvent N-methylmorpholine-N-oxide. The spinning solution is processed in a combined dry/wet spinning process to form fibers and shaped cellulosic materials.
The fibers used are usually glass, carbon, aramid, or basalt. In simple terms, it is a mixture of a plastic and fiber. Fiber-reinforced plastics belong to the category of composite plastics that specifically use fiber materials to enhance the strength and elasticity of plastics. The matrix is a tough but relatively weak plastic that is reinforced by stronger and elastic fibers. The extent that strength and elasticity are enhanced in a fiber-reinforced plastic depends on the properties of
The study biosynthesized silver nanoparticles from water hyacinth leaf extract because of extract’s phytochemical that serves as reducing and capping agent to silver ions to make them silver nanoparticles. After color change was observed during the water bath method in synthesis that indicates silver nanoparticles, UV-Visible