European Multidisciplinary Journal of Modern Science

Analysis of the Cooling Tower Ventilator in the MATLAB Software

2024-03-26T03:09:18+00:00

The article describes the construction of a computer model for an open-type heat exchange-tube fan cooling tower. This model incorporates units for calculating the temperature of the liquid within the heat exchange-tube pipe, the air temperature, as well as blocks for mass exchange and equilibrium conditions. These enhancements aim to improve the accuracy and reliability of temperature calculations within the cooling tower system.

Pollution Analysis of an Active River Bottom Sediment in Borokiri (Ikpukulu River), Niger Delta, Nigeria

2024-03-26T03:09:15+00:00

The Niger Delta region, endowed with significant oil and gas resources, faces environmental challenges linked to artisanal petroleum refining activities. This study explores the environmental repercussions of these activities on the ecosystem health of Ikpukulu River bottom sediments in Borokiri, Niger Delta, Nigeria. The study incorporates an assessment of heavy metal and hydrocarbon contamination using geoaccumulation index (Igeo), pollution load index (PLI), and potential ecological risk index (PERI). Three sampling points (X, Y, and Z) along the Ikpukulu River were investigated. While heavy metal concentrations generally fell within background levels, hydrocarbon content, particularly Total Hydrocarbons (THC), exhibited significant pollution. The PERI values for all three points indicated very high ecological risk, demanding immediate attention and remediation efforts. The Ikpukulu River serves as a potential sink for waste from illegal hydrocarbon refining, highlighting severe coastal river pollution in the region. Proactive measures and stringent pollution control regulations are recommended to safeguard the ecosystem's health. The study contributes valuable insights for remediation efforts and policy development in addressing the environmental challenges associated with artisanal petroleum refining in the Niger Delta.

Preparation and Study of Structural and Optical Properties of PbS:Cu Nanostructured Thin Films

2024-03-21T10:04:45+00:00

Thin films of lead sulfide (PbS) and various Cu mixing ratios (30%, 50%, and 70%) are used in this work. were made using the (PLD) method on glass substrates at a wavelength of 1064 nm and 600 mj of laser energy. X-ray diffraction experiments were used to determine the structural measurements for pure PbS, and other mixes present thin films demonstrated a face-centered-cubic structure. and discovered that the average grain size was 17.74 nm; this grew to 20.54 nm after combining with 30% Cd, 20.54 nm after mixing with 50% Cd, and 23.15 nm after mixing with 70% Cd. The optical characteristics of PbS thin films measured between 300 and 1100 nm in wavelength. For PbS thin films, the optical transmittance and transparency decrease as the o mixing ratio increases.The absorption coefficient rises as the mixing ratio does. When the mixing ratio is increased, the band gap for pure PbS thin film is 2.43, rises to 3.03, and thereafter falls to 2.01 and 1.5.