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All Journal Indonesian Journal of Chemistry ASEAN Journal of Chemical Engineering
Sri Mulyati
Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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The Atmospheric Corrosion of Structural Steel after Exposure in the Palm Oil Mill Industry Area of Aceh-Indonesia Muhammad Zulfri; Nurdin Ali; Husaini Husaini; Sri Mulyati; Iskandar Hasanuddin
Indonesian Journal of Chemistry Vol 21, No 4 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.62769

Abstract

The major cause of early failure in the infrastructures of the palm oil industry in Aceh, Indonesia has been discovered to be the corrosion caused by air pollution from exhaust fumes of the factory plants. Therefore, this research was conducted to analyze the effect of the atmospheric corrosion of the structural steel used in the palm oil mill industry. The five types of structural steel used as samples include strip, l-shape, round bar, plate, and SAPH 610 low carbon steel with a carbon content of 0.18%. These specimens were cleansed from dirt, scaled, and rubbed with sandpaper to achieve a grid of 600, later washed with fresh water and rinsed with alcohol, and subsequently exposed to the environment in PT ASN and PT AKTS palm oil mills for 12 months. Moreover, they were placed on a measuring tray for exposure and the corrosion rate was recorded once a month using the mass loss method in line with the ASTM G50. The results showed the steel construction with a round bar shape was more resistant to atmospheric corrosion and the remaining samples were also observed to be safe and relatively resistant based on their classification as being outstanding (< 1 mpy).
Enhancing the Anti-Fouling Property of Polyethersulfone-based Membrane using Chitosan Additive from Golden Snail (Pomacea canaliculata) Shell Waste for Water Purification Sri Mulyati; Cut Meurah Rosnelly; Yanna Syamsuddin; Nasrul Arahman; Syawaliah Muchtar; Wahyuni Wahyuni; Tiara Lauzia; Aulia Chintia Ambarita; Muhammad Roil Bilad; Shafirah Samsuri
ASEAN Journal of Chemical Engineering Vol 23, No 2 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.79643

Abstract

One of the common techniques for treating water and water from waste effluent is membrane filtration. Polymer is the main material that is most extensively employed as a substance for membranes. Because of its outstanding strength and resistance to chemicals, Polyethersulfone, also known as PES, is a common polymer used in the production of membranes. Unfortunately, its hydrophobicity makes it easy to foul when applied to water treatment processes. This study introduced a chitosan additive isolated from golden snail shell waste as an additive for PES-based membrane fabrication via blending at 0 wt%, 1 wt%, 3 wt%, 5 wt%, and 7 wt%. After preparation, the resultant membranes were analyzed and tested for their ability to filter a humic acid solution at a concentration of 50 mg L-1. According to the findings, the chitosan additive has the potential to change the characteristics of the membrane as well as its filtration performance. It increased the pure water flux from 110 181 L m-2 h-1 (no chitosan loading) to 181 L m-2 h-1 (for five wt% loadings). The membrane characterization results supported this increase in pure water flux, which showed that adding chitosan additives improved the porosity, size of pores, and hydrophilicity. The addition of this additive also has a good effect on the anti-fouling property by increasing the fouling recovery ratio (FRR). The FRRs for the modified membranes were 79% to 82%, which were higher than the neat PES membrane with an FRR of merely 60%.
Co-Authors Aulia Chintia Ambarita Cut Meurah Rosnelly Husaini Husaini Iskandar Hasanuddin Muhammad Roil Bilad Muhammad Zulfri Nasrul Arahman Nurdin Ali Shafirah Samsuri Syawaliah Muchtar Tiara Lauzia Wahyuni Wahyuni Yanna Syamsuddin