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Journal of Industrial Process and Chemical Engineering (JOICHE)
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : -     EISSN : 28078543     DOI : https://doi.org/10.31284/j.joiche.2022.v2i2.3852
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering
Energi Proses Industri Kimia Material Maju Pengendalian Pencemaran Lingkungan Simulasi dan Pemodelan Savety engineering Pengendalian Kualitas
Arjuna Subject : Teknik Kimia (semua kategori) - Kimia Proses dan Teknologi
Articles 5 Documents
 1 
Search results for , issue "Vol 4, No 2 (2024)" : 5 Documents clear
Pengaruh Rasio Asam Sitrat dan 4-carboxy-3-chlorobenzene boronic acid terhadap Quantum Yield dari Graphene Quantum Dots Permadi, Adi; Putri, Mutiara Wilson
Journal of Industrial Process and Chemical Engineering (JOICHE) Vol 4, No 2 (2024)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.joiche.2024.v4i2.7584

Abstract

This study investigates the effect of citric acid (CA) and 4-carboxyl-3-chlorobenzeneboronic acid (CBBA) ratio on the Quantum Yield (QY) of Graphene Quantum Dots (GQDs). The hydrothermal synthesis method was employed with various CA/CBBA molar ratios, and the optical properties were analyzed using UV-Vis and photoluminescence (PL) spectroscopy. The results show that increasing the CBBA ratio enhances fluorescence efficiency, with the highest QY of 5.075% obtained at a 1:5 ratio. The addition of CBBA improves surface passivation and reduces non-radiative recombination sites, thereby optimizing the photoluminescence properties. Furthermore, precursor ratio variation influences particle size and functional groups, affecting the solubility and stability of GQDs. These findings highlight the role of CBBA in controlling exciton recombination, making GQDs more efficient for optoelectronic, bioimaging, and biomedical applications. Further studies are needed to explore the long-term effects of CBBA doping on fluorescence stability
KAJIAN PENERAPAN SISTEM MANAJEMEN KESELAMATAN DAN KESEHATAN KERJA DI PT. SPINDO,Tbk., SURABAYA Wicaksono, Bintang Cahyoadi
Journal of Industrial Process and Chemical Engineering (JOICHE) Vol 4, No 2 (2024)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.joiche.2024.v4i2.6598

Abstract

Occupational Safety and Health Management System (SMK3) is a labor protection system in preventing and minimizing the risk of material and non-material losses, so that it can support effective and efficient performance improvement. In accordance with PP No. 50 of 2012, one way to prevent work accidents is through the implementation of the Occupational Safety and Health Management System (SMK3). In implementing SMK3, every company is required to carry out five things, namely determining K3 policies, K3 planning, implementing K3 plans, monitoring and evaluating K3 performance, and reviewing and improving SMK3 performance. Research at PT. Spindo, Tbk., is intended to assess the company's readiness to implement SMK3 in the technical aspect according to the standards of Government Regulation 50 of 2012. While the study on the technical aspect was carried out using the SMK3 audit checklist according to the standards of Government Regulation 50 of 2012. The results of the study concluded that in the technical aspect, the company's readiness in implementing SMK3 according to the standards of PP 50 of 2012 achieved a value of 72.8%, or is in the category of good implementation level.
PABRIK SODIUM SULFAT DEKAHIDRAT DARI SODIUM CHLORIDE DAN ASAM SULFAT DENGAN PROSES MANNHEIM Purwaningsih, Dian Yanuarita; Mulya, Jaya Hadi
Journal of Industrial Process and Chemical Engineering (JOICHE) Vol 4, No 2 (2024)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.joiche.2024.v4i2.7703

Abstract

At the end of 2019, the COVID-19 pandemic hit the world, which had several effects on various sectors, one of which made several industrial sectors suffer heavy losses and even bankruptcy. The industrial sector needs household goods, such as soap and detergent, among the most needed items during the Covid-19 pandemic. To produce these hygiene items, the industrial sector requires various raw materials, one of which is Sodium sulfate (Na2SO4). Sodium sulfate is processed using the Mannheim process through reaction, crystallization, and drying stages. The designer plans to build a plant with a capacity of 20,000 tons/year in the industrial area of Lamongan, East Java. The raw materials used consist of sulfuric acid and sodium chloride. The utility unit consists of a water supply unit, steam supply unit, power generation unit, fuel supply unit, and cooling supply unit. The company's business entity is a Limited Liability Company (PT) using a line and staff organizational structure with 150 employees. The employee work system is based on the division of working hours consisting of shift and non-shift employees. The researchers produced several results of economicanalysis: Fixed Capital Investment (FCI) value of Rp. 195,180,724,917, Working Capital Investment (WCI) value of Rp. 34,443,657,338, Total Cost Investment (TCI) value of Rp. 229,624,382. 255, then the Total Product Cost (TPC) value is Rp. 441,103,560,855, and the Total Sale (TS) value is Rp. 522,048,972,696, Internal Rate of Return (IRR) of 35.98%, Pay Out Time (POT) for 3.15 years, and Break-Even Point (BEP) value of 36.40%. Based on the above evaluation results, the Sodium sulfate decahydrate plant from Sulfuric acid and Sodium chloride by Mannheim process is feasible.
Pemodelan Perilaku Kelarutan Molekul Air terhadap Variasi Pelarut pada Permukaan CulnS2/ZnS Quantum Dots Menggunakan Pendekatan ab-initio berbasis Density Functional Theory Permadi, Adi
Journal of Industrial Process and Chemical Engineering (JOICHE) Vol 4, No 2 (2024)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.joiche.2024.v4i2.7583

Abstract

This study investigates the solubility behavior of water molecules on the surface of CuInS₂/ZnS Quantum Dots (QDs) in different solvents using an Ab Initio approach based on Density Functional Theory (DFT). The research evaluates the influence of solvent dielectric constant on surface potential energy and solute-solvent interaction energy. The study reveals that hydrogen bonding, dipole-dipole interactions, and van der Waals forces significantly affect QDs stability and size. The findings indicate that solvents with higher dielectric constants destabilize nanoparticles, leading to electron transfer between particles. Among the tested solvents, chloroform provides an optimal balance between solubility, stability, and band gap (~1.68 eV). These results contribute to a deeper understanding of solvent-mediated effects on QDs, essential for their application in optoelectronics and bio-imaging.
PERENCANAAN INSTALASI PENGOLAHAN LUMPUR TINJA (IPLT) WARA II KOTA AMBON Anditiaman, Yuliana
Journal of Industrial Process and Chemical Engineering (JOICHE) Vol 4, No 2 (2024)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.joiche.2024.v4i2.6602

Abstract

The sewage sludge treatment system at IPLT WARA II, where the physical infrastructure is poorly maintained and management is not running optimally according to Standard Operating Procedures and technical specifications. With the passing years and an increasing population, the volume of sewage sludge predicted does not match the actual volume of sludge produced. The aim of this study is to evaluate the design of the Sludge Separation Chamber and Oxidation Ditch units in IPLT WARA II. The study found that the wastewater flow rate had increased from 100 m³/day to 225 m³/hour. In addition to the flow rate, the design and dimensions of the newly added units in IPLT WARA II were obtained, showing that their implementation is quite efficient with a removal rate of up to 95%. The SSC (Volume = 112 m³, P = 34 m, L = 5 m, Freeboard = 0.5 m), OD (Surface Area = 97 m²), and Clarifier (Volume = 29 m³) were identified. The addition of SSC and OD units as new management strategies ensures that the treatment quality meets environmental standards in accordance with sanitation facility regulations and the Environmental Protection and Management Law. Retribution arrangements have been implemented so that the community and septic tank service companies can make payments in accordance with the local regulation (PERDA).

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