Muhammad Faizal

Synthesis and Properties of Fe3O4 Nanoparticles by Co-precipitation Method to Removal Procion Dye

Fe3O4 (magnetite) nanoparticles were synthesized by chemical co-precipitation method. The structure, morphology and magnetic properties of as-prepared were characterized by X Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X Ray Spectrometry (SEM-EDS), Transmission Electron Microscope (TEM) and Vibrating Sample Magnetometer (VSM). The result of XRD characterization was indicated Fe3O4 as the product. SEM and TEM image of the Fe3O4 showed nanoparticles Fe3O4 have the mean diameter 5-20 nm. The EDS spectra showed strong peaks of Fe and O. Magnetic characteristic of Fe3O4 nanoparticles was indicated super paramagnetic properties. The saturation magnetic was 89.46 emu g-1. Therefore, the nanoparticles Fe3O4 is suitabe to remove dye in the water by a simple magnetic separation process. The optimum adsorption occurred at initial concentration of procion dye 100 mg L-1, pH solution 6, dosage of Fe3O4 0.8 g L-1 and contact time 30 minutes under room temperature with color removal 24.40 % and adsorption capacity was 30.503 mg g-1

Characterization of Activated Carbon from Oil Palm Shell Prepared by H3PO4 for Procion Red Dye Removal

Characterization of activated carbon from oil palm shell prepared by H3PO4 and application for the removal of procion red dye was investigated. Oil palm shell was carbonized at 500°C and prepared by H3PO4 5 % with ratio of 1:3. Characterized activated carbon by Fourier Transform Infra Red Spectroscopy (FTIR), Brunauer Emmet Teller (BET) surface area, Scanning Electron Microscope-Energy Dispersive X Ray Spectrometry (SEM-EDS). The result indicated that functional groups on the activated carbon surface were influenced by acidic treatment. The activated carbon have surface area 385.991 m2g-1 and volume of micro porous 0.201 cm3g-1. The SEM-EDS image showed that activated carbon have many porous structure and the strong peak of C was 92.7 %. Adsorption capacity of activated carbon prepared by H3PO4 5 % was 278.197 mg g-1 which is higher than not chemical activation was 216.456 mg g-1 at equilibrium time 5 h.

Effect of air speed and expansion valve openings on moisture content and dry air ratio in a modified air conditioning evaporator system

Air conditioning system has four main components of compressor, condenser, expansion valve, and evaporator. The effect of air speed and expansion valve openings on moisture content and dry air ratio in a modified air conditioning system has been investigated. The transerved air stream with the aid of a blower enters the evaporator through three baffles. Air flow capacity of the blower can be altered to get the variation of air speed entering the evaporator. The result of this research shows that the expansion valve openings have a significant change on the ratio of water vapor and dry air.Air conditioning system has four main components of compressor, condenser, expansion valve, and evaporator. The effect of air speed and expansion valve openings on moisture content and dry air ratio in a modified air conditioning system has been investigated. The transerved air stream with the aid of a blower enters the evaporator through three baffles. Air flow capacity of the blower can be altered to get the variation of air speed entering the evaporator. The result of this research shows that the expansion valve openings have a significant change on the ratio of water vapor and dry air.