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Ni-Nanoparticle Beads: An Advanced Nano-Catalyst for Efficient Photocatalytic Degradation of Pharmaceuticals
No full textThis article is index by ScopusThe increasing demand for pharmaceuticals, essential for promoting human health and maintaining quality of life, is contributing to environmental degradation. Pharmaceuticals are found in various sources, including industrial wastewater, urban agricultural runoff, and hospital effluent. Their improper disposal leads to environmental pollution, posing significant risks to both living and non-target organisms. Photocatalysis using semiconductor nanoparticles is a clean, efficient, and environmentally friendly method for degrading pharmaceuticals, due to the presence of potent oxidizing species. This study investigates the degradation of two pharmaceutical chemicals, aspirin and theophylline, in an aqueous solution using alginate, a naturally occurring polymer derived from brown seaweeds. This research advances the development of efficient photocatalytic technologies for environmental remediation and water treatment, aiming to improve water quality and public health. The Ni nanoparticle bead catalyst was produced using the sol-gel process following established procedures. The photocatalytic activity was evaluated by examining the effects of pH levels (4, 5, 6, 7, and 8), catalyst doses (10, 20, 30, 40, 50, and 60 g/L), and initial concentrations (10, 20, 30, 40, and 50 mg/L) over a one-hour irradiation period. Aspirin concentration was measured using a UV-Vis spectrophotometer at 229 nm, and theophylline concentration at 273 nm. The study identifies the optimal conditions for the removal of aspirin and theophylline as a pH of 5, a catalyst dosage of 40 g/L, and an initial concentration of 10 mg/L…see more
IMPLEMENTATION OF FACTORY-IN-FACTORY (FIF) PRODUCTION SYSTEM IN A SMALL MEDIUM AUTOMOTIVE COMPANY
No full textIn this thesis, a new concept of production system model called Factory-inF actory (FiF) has been developed and iplemented to improve the efficiency and effectiveness on production system in small medium automotive company. The FiF production system is an enhancement of the current continuous improvement concept in which presently most of the automotive industries implement Lean Manufacturing (LM) as their model of continuous improvement. Even though the LM has been adopted and adapted, and widely recognized and utilized by the worldwide organizations, but many unsolved issues such as product defects, products recall, late delivery and product recall still appear especially involving the suppliers or vendors. This study has been conducted by reviewing the current trend of the continuous improvement program, discussing on the unsolved issues and in-depth analysis for the automotive manufacturing sectors has been conducted by identifying the success factors of continuous improvement program. This developed new production system, known as FiF, has been introduced in an automotive tiers system through reshuffling the vendor tiers system by introducing Tier-0. The intents of the developed FiF production system are to improve the communication between the vendors and shorten the lead time through wastes elimination by introducing single production layout with multiple vendors. The results of this study as implemented in a small medium automotive company shows significant impacts in minimization of wastes. The introduct_d FiF production system has optimized the unsolved issue where the production lead time and communication between the vendors have been improved because the selected vendors are involved directly with production assembly in manufacturer plant It is foreseen that the future potential of FiF concept will drastically change the production system where the manufacturer's production plant will be segregated section by section and each section will be owned by vendors
