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Rifka Noor Azizah
Department Of Environmental Engineering, Institut Teknologi Sumatera
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Transportation Other

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Modeling Quality and Pollution Load Capacity of the Musi River Using QUAL2Kw Rafles Ami Poza; Nur Faizaturrohmah; Erlina Kurnianingtyas; Isoralla; Dion Awfa; Rifka Noor Azizah; Muhammad Ulin Nuha; Arif Rohman; Aulia Try Atmojo; Daffa Adli Nauval Purnomo
Journal of Engineering Environtmental Energy and Science Vol. 5 No. 2 (2026): JUNI 2026
Publisher : LPPMP Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/1e9rfg06

Abstract

The aim is to analyze water quality and determine the pollutant load of the Musi River in Palembang City using the QUAL2K model. The method involved collecting water-quality data (TSS, NH₃, COD, and pH), calibrating and validating the model using hydraulic and water-quality parameters, and simulating the burden on the power capacity of the polluted river. The research results show that the QUAL2Kw model has high accuracy and performs well under representative field conditions. As for the spatial distribution, TSS and NH3 concentrations tend to increase from upstream to downstream due to anthropogenic activity, but they remain within safe limits. For COD, conditions tend to exceed the river’s capacity, with marked negative values. This indicates a high organic pollution pressure and the potential to degrade the quality of the aquatic ecosystems. This model can be used as a good basis for sustainable management of river water quality.
The Impact of Incorporating Biochar on the Development of Goethite Nanoparticles Produced via Precipitation Method Iwan Syahjoko Saputra; Achmad Gus Fahmi; Rifka Noor Azizah; Rina Andriyani; Anjar Hermadi Saputro; Ine Pebriyanti; Aluna Monalaika Izzati
Indonesian Journal of Science and Education Vol. 10 No. 1 (2026): Indonesian Journal of Science and Education (In Press)
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v10i1.2809

Abstract

This research explores a novel synthesis approach for goethite nanoparticles (Goe-NPs) due to the addition of biochar during goethite formation. This study investigated the effect of biochar addition on the Goe-NPs agitation process. Biochar was added on days 1, 7, 14, and 21 after reacting iron nitrate and base during agitation (30 days in 40 ℃). Based on the observation, the addition of biochar on day 14 (Goe-14d) has the smallest and most uniform particle size (±60 nm) compared to the addition of biochar on day 21 (Goe-21d) measuring about ±99 nm, and goethite synthesis without the addition of biochar (Goe-BLANK) measuring approximately >1000 nm. Functional group analysis using FTIR identifies all goethite produced from this synthesis method has an Fe-O6 octahedral lattice peak found at 642 cm-1 and Fe-O-H bending vibrations at 795 cm-1 and 889 cm-1 with varying intensity at each biochar addition time. The peak intensity of the Goe-NPs spectrum decreased when the growth of goethite particles was fully formed and agglomerated (>7 days of biochar addition). XRD analysis showed the crystal structure of Goe-NPs, with additional peaks indicating potential impurities from the formation of ferrihydrite because goethite was not fully formed. SEM images showed the effect of biochar addition on the unique particle size and morphology between Goe-NPs at biochar addition before day 7 and after day 7, indicating biochar can reduce agglomeration. This study demonstrates a promising new synthesis route for Goe-NPs using this biochar addition, with the potential to customise the size and type of goethite particles based on their growth time.
Producing chitosan from shellfish waste and its application as a natural coagulant in water purifiers Feerzet Achmad; Rifka Noor Azizah; Yuliana Daulay; Reni Yuniarti; Suharto Suharto; Suhartono Suhartono; Siti Rizkyna Noorsaly
Konversi Vol 13, No 2 (2024): OKTOBER 2024
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v13i2.19882

Abstract

Waste from simping shellfish (Amusium pleuronectes) shells can pose environmental hazards if waste levels exceed the threshold. This research aims to produce chitosan from shellfish, specifically simping shells, for the purification of raw water. The optimal dosage for both chitosan and alum coagulants in water samples with bay river turbidity (49.5 NTU) is 1 ppm, resulting in a turbidity removal percentage of 99%. The optimum pH for chitosan coagulant (1 ppm) is 6.32, and for alum coagulant (1 ppm) is 8. For bay river water with an initial turbidity of 49.5 NTU, the optimal dose of chitosan coagulant is 1 ppm, achieving a turbidity removal percentage of 99%. Producing chitosan from shellfish waste as a natural coagulant for water purification offers an eco-friendly, cost-effective solution that enhances water quality, reduces seafood industry waste, and provides a safe alternative to chemical coagulants, with potential applications in various fields.
Co-Authors Achmad Gus Fahmi Adhi Yuniarto Agus Slamet Ahmad Daudsyah Imami Ainan Azka Alam, Firdha Cahya Aluna Monalaika Izzati Andika Munandar Ani Purwanti Anjar Hermadi Saputro Arif Rohman Aulia Try Atmojo Daffa Adli Nauval Purnomo Desy Rahmadani Telaumbanua Dion Awfa Dwi Marisa Putri Edo Barlian Edo Kharima Army Elinda Mutiara Endang Setiawati Erlina Kurnianingtyas Evi Eri Narita Fairuza Marhamah Feerzet Achmad Fitria, Laili FITRIA, NOVI Hafiz Achmad Fauzan I Wayan Koko Suryawan Ine Pebriyanti Isoralla Istiqomah Shariati Zamani Iwan Syahjoko Saputra Janter Pangaduan Simanjuntak Janter Pangaduan Simanjuntak Lisbet Farida Sinaga M. Faisi Ikhwali Muhammad Meiko Cahya Anugrah Muhammad Ulin Nuha Nasrul Putra Novriadi Nur Faizaturrohmah Putri Lynna A. Luthan Putri Lynna A. Luthan Rachmat Mulyana Rafles Ami Poza Rahma Yanda Reni Yuniarti Resarizki Utami Rina Andriyani Royana Chairani Sitepu Amrina Rosyada Sitepu Amrina Rosyada Siti Rizkyna Noorsaly Suharto Suharto Suhartono Suhartono Suryawan, I Wayan Koko Trian Saputri Vandith Va Vemi Ridantam Vemi Ridantam Wisnu Prayogo Wisnu Prayogo Wisnu Prayogo Yuliana Daulay Yulisa Putri Zenia F Saraswati Zhilli Izzadati Khairuni