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Pengaruh Konsentrasi Polyaluminium Choride (PAC) dan Polydadmac Terhadap Proses Koagulasi dan Flokulasi pada Pengolahan Air Sungai Cengkareng Drain Redjeki, Athiek Sri; Darmi, Hedro; Yudistirani, Sri Anastasia; Purnawan, Irfan; Hasyim, Ummul Habibah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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This study was conducted to determine the effect of the concentration ratio of Polyaluminium Choride (PAC) and Polydadmac coagulants on the coagulation and flocculation processes in river water treatment. The raw water used is raw water that is processed by IPA Taman Kota PT. XYZ namely Cengkareng Drain river water with a turbidity of 19.3 NTU and a pH of 7.22. This study uses the jar test method. The selected variables are variations in the concentration of PAC and polydadmac. The water produced from the jar test was tested for its turbidity and pH. This research was started by sampling raw water, then 1000 ml was put in each glass jar test tool. Then the flocculation process was carried out with a stirring speed of 200 rpm for 2 minutes. Followed by the coagulation process with a stirring speed of 40 rpm for 18 minutes. The process continued with sedimentation for 10 minutes. The optimum dose obtained was the combination of 20 ppm PAC and 0.4 ppm polydadmac with a turbidity value of 1.08 NTU or with a removal efficiency value of 94.40% and a pH value of 7.06.

Ekstraksi Pektin dari Kulit Pisang (Musa Paradisiaca) Sebagai Bahan Pengental Saus Cabai Shabrina, Alifira Fajriatu; AB, Syamsudin; Fitriyano, Gema; Purnawan, Irfan; Fithriyah, Nurul Hidayati
Prosiding Semnastek PROSIDING SEMNASTEK 2024
Publisher : Universitas Muhammadiyah Jakarta

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Pemanfaatan buah pisang hanya terbatas pada daging buah saja, sedangkan kulit buah pisang yang jumlahnya cukup besar sering kali dibuang begitu saja tanpa dimanfaatkan terlebih dahulu padahal di dalam kulit buah pisang terdapat kandungan pektin yang memiliki nilai ekonomis yang tinggi. Pektin adalah senyawa polisakarida yang larut dalam air yang mengandung gugus-gugus metoksil. Penggunaannya yang paling umum adalah sebagai bahan perekat/pengental (gelling agent). Tujuan penelitian ini adalah untuk mengetahui potensi kandungan pektin pada kulit buah pisang, perbandingan suhu ekstraksi terbaik pada proses ekstraksi serta karakterisasi pektin hasil ekstraksi. Pada penelitian ini, proses ekstraksi dilakukan dengan menggunakan pelarut air yang diasamkan dengan penambahan asam klorida dengan konsentrasi 0,5 N. Pada percobaan ini variabel tetap yang digunakan adalah waktu yaitu selama 90 menit, sedangkan variabel terikat yang digunakan adalah suhu. Analisa yang dilakukan meliputi pH, kadar air, kadar abu, berat ekuivalen, kadar metoksil, dan kadar asam galakturonat serta uji viskositas pada saus cabai. Hasil penelitian menunjukkan rendemen tertinggi didapatkan pada suhu ekstraksi 85°C yaitu sebesar 8,25%, kadar asam metoksil 2,98%, kadar asam galakturonat sebesar 70,72%, kadar air 8,00%, kadar abu 3,63%, dan uji viskositas saus sebesar 8500 cP.Kata kunci: ekstraksi, kulit pisang, metoksil, pektin

PENGARUH SUHU OKSIDASI ISOEUGENOL PADA PEMBUATAN VANILLIN DENGAN OKSIDATOR M-NITROBENZENE SULFONIC ACID SODIUM SALT Marsela, Anis; Purnawan, Irfan
Prosiding Semnastek PROSIDING SEMNASTEK 2024
Publisher : Universitas Muhammadiyah Jakarta

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Permintaan akan vanillin semakin meningkat, sedangkan jumlah produk vanillin sendiri terbatas karena pembuatan vanillin dari batang tanaman vanillin memerlukan biaya yang cukup besar, sehingga diperlukan alternatif bahan baku lain untuk membuat vanillin secara sintesis salah satunya dari isoeugenol yang merupakan isomer dari eugenol. Tujuan dari penelitian ini adalah untuk mendapatkan proses oksidasi yang dapat menghasilkan rendemen vanillin yang tinggi, mengetahui pengaruh dari variasi suhu terhadap kemurnian vanillin yang dihasilkan dari reaksi oksidasi isoeugenol. Pembuatan vanillin dari isoeugenol dilakukan dengan cara mengoksidasi isoeugenol menjadi vanillin. Pada penelitian ini akan dilakukan proses oksidasi dengan oksidator Nitrobenzen Sulfonic Acid Sodium Salt untuk mendapat kondisi optimum dalam percobaan ini dilakukan variasi suhu oksidasi 95 oC, 97,5 oC, 100 oC, 102,5 oC, 105oC, 107,5oC selama 1 jam. Proses pembuatan vanillin dari isoeugneol terdiri dari proses oksidasi, proses ekstraksi dengan menggunakan toluen, proses evaporasi untuk menguapkan toluen dan rekristalisasi untuk memurnikan kristal vanillin. Dari hasil penelitian diperoleh hasil bahwa suhu terbaik untuk reaksi oksidasi adalah 102,5oC dengan kadar vanillin setelah reaksi oksidasi adalah 93,12% , sedangkan kadar kristal vanillin setelah rekristalisasi adalah 99,02% dan rendemen nya sebesar 82,70%. Kata kunci: Isoeugenol, Nitrobenzen Sulfonic Acid Sodium Salt, Oksidasi, Vanillin.

Production and Characterization of Bio-Briquettes from Coconut Leaves and Cassava Peels Fitriyano, Gema; Ismiyati, Ismiyati; Purnawan, Irfan; Ramadhan, Raihan Fajar
International Journal of Applied Sciences and Smart Technologies Volume 05, Issue 02, December 2023
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v5i2.5567

Bio-briquettes from a mixture of coconut leaves charcoal and cassava peels charcoal have been produced and characterized in this study. The analysis carried out included density, burning rate, water content, ash content, and calorific value. Bio-briquette samples were produced with composition variations between coconut leaves charcoal and cassava peels charcoal with mass percentage ratios of 100:0, 75:25, 50:50, 25:75, 0:100. The mixture used to produce briquettes with a ratio of tapioca flour, water and charcoal as raw materials is 1.5:1.5:2. The results of the study show that the density and calorific value of bio-briquettes increases with the increase in the amount of cassava peel in the briquette content. The optimum bio-briquette product from this research was found in variations of coconut leaves and cassava peels with a ratio of 75:25. Where density is 0.96 g/ml, burning rate is 0.190 g/min, water content is 3%, the ash content is 18.81%, and the calorific value is 3521.47 Cal/g.

Hubungan Supervisi Kepala Ruangan Dengan Kepatuhan Tenaga Kesehatan Dalam Menjalankan Standar Operasional Prosedur Pemasangan Infus Di UPTD Puskesmas Mawasangka TimurTahun 2023 Irfan Purnawan; Sancka Stella G. Sihura
Vitamin : Jurnal ilmu Kesehatan Umum Vol. 2 No. 2 (2024): April : Jurnal ilmu Kesehatan Umum
Publisher : Asosiasi Riset Ilmu Kesehatan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/vitamin.v2i2.234

Infusion is one of the invasive procedures performed by health workers by injecting a certain amount of fluid into the body into the vein to improve or prevent fluid and electrolyte, blood, and nutritional disturbances. The act of installing an infusion will be of high quality if in its implementation it always complies with the standards that have been set. One of the factors that can affect the performance of nurses, including the compliance of nurses and midwives in providing actions according to the SOP is supervision. This study aims to analyze the relationship between the supervision of the head of the room and the compliance of health workers in carrying out standard operating procedures for infusion at the UPTD Puskesmas Mawasangka Timur in 2023. This study is a correlation analytic study with a cross sectional study design. The sample in this study was 41 people consisting of 21 nurses and 20 midwives. The sampling technique used in this study is nonprobability sampling with total sampling. Data were analyzed using the chi-square test to determine the relationship between the independent and dependent variables. The results of statistical tests showed that there was a relationship between the supervision of the head of the room and the compliance of health workers in carrying out standard operating procedures for infusion at the Mawasangka Timur Health Center UPTD in 2023 (p-value 0.000 <0.05). Supervision of the head of the room has a significant role in increasing the compliance of health workers, especially nurses and midwives, in carrying out standard operational procedures for infusion installation.

Pengaruh Konsentrasi Polyaluminium Choride (PAC) dan Polydadmac Terhadap Proses Koagulasi dan Flokulasi pada Pengolahan Air Sungai Cengkareng Drain Redjeki, Athiek Sri; Darmi, Hedro; Yudistirani, Sri Anastasia; Purnawan, Irfan; Hasyim, Ummul Habibah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

This study was conducted to determine the effect of the concentration ratio of Polyaluminium Choride (PAC) and Polydadmac coagulants on the coagulation and flocculation processes in river water treatment. The raw water used is raw water that is processed by IPA Taman Kota PT. XYZ namely Cengkareng Drain river water with a turbidity of 19.3 NTU and a pH of 7.22. This study uses the jar test method. The selected variables are variations in the concentration of PAC and polydadmac. The water produced from the jar test was tested for its turbidity and pH. This research was started by sampling raw water, then 1000 ml was put in each glass jar test tool. Then the flocculation process was carried out with a stirring speed of 200 rpm for 2 minutes. Followed by the coagulation process with a stirring speed of 40 rpm for 18 minutes. The process continued with sedimentation for 10 minutes. The optimum dose obtained was the combination of 20 ppm PAC and 0.4 ppm polydadmac with a turbidity value of 1.08 NTU or with a removal efficiency value of 94.40% and a pH value of 7.06.

Hybrid TiO₂@SiO₂ Green Hydrogel Nanocatalyst for High-efficiency Photocatalytic Oxidation of Ciprofloxacin under UV Irradiation: Experimentation and RSM Optimization Mansour, Riad; Ferrah, Nacer; Fithriyah, Nurul Hidayati; Purnawan, Irfan; Chabane, Mustapha; Zahouane, Fadila; Melkaoui, Chikh
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20615

A TiO₂@SiO₂ hydrogel nanocomposite was synthesized via a green sol-gel route for the photocatalytic degradation of ciprofloxacin using a UVA/H2O2 system. The catalyst was optimized via RSM (response surface methodology), identifying UVA irradiation (365 nm) and pH of 5.6 as key parameters, achieving >89% degradation within 180. Characterisation confirmed homogeneous TiO₂ dispersion within a porous SiO₂ matrix. Kinetics followed a pseudo-first-order Langmuir–Hinshelwood model, and the catalyst retained high activity over five reuse cycles. This study introduces a UVA-optimized, RSM-guided photocatalytic system using a green-synthesized TiO₂@SiO₂ hydrogel –distinguished by its integrated process design, operational simplicity, and focus on solar-compatible UVA rather than conventional UVC-driven TiO2@SiO2 systems. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

OPTIMIZING OPERATING PARAMETERS AND POLYACRYLIC ACID ANTISCALANT DOSAGE IN A REVERSE OSMOSIS UNIT M Khoirul Ummam; Irfan Purnawan; Nurul Hidayati Fithriyah
Journal of Applied Sciences and Advanced Technology Vol. 8 No. 2 (2025): Journal of Applied Science and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

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Reverse osmosis (RO) technology is one of the most widely used and highly effective filtration technologies. RO membranes generally act as barriers to dissolved salts and inorganic compounds, as well as organic molecules witmolecular weights greater than 100 angstroms. Several factors influence the rate of mineral scale formation on the surface of RO membranes, including lower temperatures, which reduce mineral scale solubility, and higher feedwater conductivity or Total Dissolved Solids (TDS), which increase the solubility of slightly soluble salts. This phenomenon is caused by increased ionic interference during the nucleation and crystallization processes of various types of scale. Mineral scaling remains a critical challenge in reverse osmosis (RO) systems, limiting recovery and increasing operational costs. This study optimizes polyacrylic acid (PAA) antiscalant dosage and system recovery in a 120 m³/h industrial BWRO (brackish water reverse osmosis) plant treating water with 20–40 ppm Ca-hardness. Dosages of 3–13 ppm and recoveries of 49–75% were evaluated based on normalized permeate flow (NPF) decline and feed pressure increase, targeting <10% performance loss. Results show that a dosage of 11–13 ppm at 74–75% recovery maintains membrane performance with less than 6.5% NPF decline and minimal pressure increase (below 1.64%) over a production volume of 6,500 m3. Statistical validation (R² > 0.96, p < 0.05) confirms the significance of these parameters, while Hyd-RO-Dose simulations support calcite saturation control. These findings provide a practical, validated framework for optimizing RO operation by enhancing efficiency and reducing fouling, as well as antiscalant dosing in industrial settings.

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