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All Journal CHEMISTRY PROGRESS Jurnal Sains Dasar Alchemy : Journal of Chemistry Jurnal Ilmu Kimia Universitas Brawijaya UNEJ e-Proceeding Science and Technology Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Jurnal Kartika Kimia Makara Journal of Science
Qonitah Fardiyah
Department Of Chemistry, Faculty Of Mathematic And Natural Science, Brawijaya University, Malang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Materials Science & Nanotechnology Physics

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The Study of Removal of Remazol Red with Biomaterial Paras Stone and Opuntia ficus-indica by Coagulation-Flocculation Hulwati, Siti; Fardiyah, Qonitah; Rumhayati, Barlah; Anggraini, Vita Dwi
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.102760

Abstract

The rapid progress of the textile industry sector has an impact on the environment by producing dye waste. The use of synthetic coagulants in processing textile industry waste containing azo dyes can cause residues that are detrimental to the environment. In this research, a technique for processing azo dye was done using natural coagulants. The use of natural coagulants provides several advantages, such as being eco-friendly, abundant, and cost-efficient. The potential of paras stone and Opuntia ficus-indica biomaterials as natural coagulants and flocculants for removing remazol red dye was thoroughly investigated under various conditions, including coagulant dose, the speed of coagulation, and the optimal initial pH of the test solution. The removal of remazol red dye was quantitatively analyzed using a UV-vis spectrophotometer at a wavelength of 520 nm. Findings from the research revealed that the removal efficiency of remazol red dye reached 96.70% with a coagulant dose of 2.75 g of paras stone and 2.00 g of O. ficus-indica at an optimal coagulation speed of 500 rpm and a pH of 4 for the testing solution. The results of this study provide an engineering perspective on optimizing operational parameters for removing remazol red in aquatic environments.
Room Temperature Synthesis of Aluminium(III)-Benzenedicarboxylate Complex from Two Different Al(III) Salts Syarifah, Nidatul; Yofandi, Muhammad Farrel; Fardiyah, Qonitah; Prananto, Yuniar Ponco
Jurnal Kartika Kimia Vol 8 No 1 (2025): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i1.936

Abstract

Al(III) complex with 1,4-benzenedicarboxylate ligand (Al-BDC) is a porous material that has the potential to be developed as an adsorbent or photocatalyst. This complex is often obtained by the solvothermal method at high temperature. This paper reports the synthesis of Al-BDC complex by solution method at room temperature from two different types of Al(III) salts, namely nitrate salt (complex 1) and chloride salt (complex 2). The synthesis of Al-BDC was conducted with Al(III):H2-BDC mol ratio of 2:3. The synthesized complexes were characterized by ATR-IR, powder XRD, UV Vis–DRS, and DTA–TGA. The results showed that white powders were obtained with a yield of 75.8% (complex 1) and 65.7% (complex 2). The presence of BDC ligands in both complexes was confirmed by the presence of typical absorption bands of C=O, C-O, and Al-O functional groups in their infrared spectra. Both complexes have different surface morphology and average crystallite sizes (28.63 nm – complex 1; 34.98 nm – complex 2), but the powder X-ray diffraction patterns, DTA-TGA thermograms, UV Vis-DRS spectra, and band gap energy values ​​of both complexes are considerably identical. Powder XRD diffraction analysis of both complexes shows a pattern that is identical to the known compound with a formula of {[Al(OH)(BDC)]·(H2BDC)0.69}n(CCDC No. 2179625) in which the compound forms 3D polymeric structure with terephthalic acid occupies the voids.
Koefisien Difusi Ion Fosfat dalam Gel Asam Sitrat-Agarosa yang Digunakan dalam Gradien Difusif pada Sampler Pasif Film Tipis (DGT) An-Nufuus, Digwanggi Arum Tazkiyatu; Rumhayati, Barlah; Fardiyah, Qonitah; Mardiana, Diah; Andayani, Ulfa; Dinira, Layta
Jurnal Penelitian Pendidikan IPA Vol 9 No 8 (2023): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i8.3593

Abstract

In this research, the diffusion coefficient of phosphate ions in agarose-citric acid diffusive gel has been studied. The agarose-citric acid diffusion layer was prepared by mixing 1.5% agarose solution with the addition of citric acid solutions at various concentration. The diffusive gel was casted between two glass plates which were separated using a spacer of 0.1 cm thickness and clamped together in the three sides. Gel was formed for 15 minutes in an oven at 40oC. The diffusion coefficient then was calculated using Fick's First law formula. Gel that produced with addition of 0.45% citric acid absorbed more water during immersion in water for 3 hours for facilitating phosphate diffusion. Swelling degree of the agarose citric acid diffusive gels was not affected by the storing solution condition either in water or in NaNO3 0.1 M. Coefficient diffusion of phosphate in the agarose-citric acid diffusive gel was 1.009×10-7 cm2s-1, less than the diffusion in the pure agarose gel 1.367×10-7 cm2s-1. The diffusion is affected by the ionic strength of solution. Phosphate diffusion coefficient is higher in the phosphate solution with addition of 2 mgL-1 nitrate. Increasing the ionic strength causes lower phosphate diffusion coefficient because the electrostatic attractive and repulsive force
New Modification of Natural Coagulants and Flocculants from Papaya Seeds (Carica Papaya L.) and Aloe Vera Gel in The Removal of Remazol Yellow Dye Wijaya, Khalida; Fardiyah, Qonitah; Rumhayati, Barlah
Jurnal Kartika Kimia Vol 8 No 2 (2025): Jurnal Kartika Kimia (In Progress)
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i2.1064

Abstract

A new modification of natural coagulant and flocculant from papaya seeds Carica papaya L. and aloe vera gel has been developed in this study to remove Remazol Yellow dye. The research parameters studied included the initial concentration of the test solution, pH, and stirring speed during the coagulation process. The initial concentration of the test solution varied from 10 to 50 mg/L, the pH ranged from 1 to 6, and the stirring speed was 650 to 1050 rpm during the coagulation phase. The coagulation and flocculation results were characterized using an FTIR spectrophotometer. The results showed that the optimum conditions were an initial concentration of 30 mg/L at pH 2 and a stirring speed of 950 rpm, resulting in the highest removal effectiveness of 97.55%. The results of FTIR spectrophotometry characterization showed that the sulfonate group -SO₃⁻ in Remazol Yellow had been removed, indicating that the protonated groups -NH₃⁺ and -COOH₂⁺ in papaya seeds and the anionic groups of the dye had electrostatic interactions. This study shows that the modification of papaya seeds and aloe vera gel as natural coagulants and flocculants shows sustainable potential for azo dye-based textile wastewater treatment.
Modifikasi Elektroda Karbon Screen-Printed dengan Magnetit-Silika-Polimer Cetak Ion untuk Sensor Pb(II) Secara Square Wave Voltammetry (SWV) Nugraha, Hedhi Setya; Mulyasuryani, Ani; Sabarudin, Akhmad; Dinira, Layta; Fardiyah, Qonitah
ALCHEMY:Journal of Chemistry Vol 13, No 2 (2025): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v13i2.36777

Abstract

Elektroda karbon cetak layar (SPCE) telah dimodifikasi dengan Fe₃O₄@SiO₂-ion imprinted polymer (IIP) untuk meningkatkan selektivitas terhadap ion Pb²⁺. Hasil voltametri siklik menunjukkan peningkatan signifikan pada kinetika transfer elektron, dengan koefisien difusi masing-masing 1,79 × 10⁻⁵ cm²/s untuk [Fe(CN)₆]³⁻/⁴⁻ dan 0,0314 cm²/s untuk Pb(II), dibandingkan SPCE tanpa modifikasi (5,76 × 10⁻⁶ cm²/s dan 0,00093 cm²/s). Optimasi parameter square wave voltammetry (SWV) menghasilkan kondisi optimum pada amplitudo 0,01 V dan frekuensi 10 Hz, dengan batas deteksi (LOD) 0,219 ppb serta linearitas sangat baik (Ip = 0,207C; R² = 0,998) pada rentang konsentrasi 1–10 ppb. Temuan ini menunjukkan bahwa SPCE termodifikasi Fe₃O₄@SiO₂-IIP berpotensi sebagai sensor yang selektif dan sensitif untuk deteksi Pb²⁺ dalam aplikasi keamanan pangan dan pemantauan lingkungan.
Electrocoagulation Applied for Removal of Microplastic Polyvinyl Alcohol (PVA) with Aluminium-Aluminium (Al-Al) Electrode in Wastewater Fardiyah, Qonitah; Ramadani, Azaria Ivana; Rumhayati, Barlah
Indonesian Journal of Chemistry Vol 26, No 1 (2026)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.109998

Abstract

The use of fabric fresheners and cleaners in the form of laundry capsules has recently received significant attention due to their practicality. The film layer used in the production of laundry capsules is made of plastic derived from polyvinyl alcohol (PVA) as its raw material. The abundance of PVA in domestic waste has led to the increasing presence of PVA microplastic contaminants in aquatic environments. The novelty of this research lies in the use of Al-Al electrodes and the addition of surfactants in the electrocoagulation method for removing PVA microplastics. This study aims to investigate the effect of surfactants on the removal of PVA microplastics in aquatic environments using Al-Al electrodes by electrocoagulation. The parameters evaluated included electrolysis time, voltage, pH, electrolyte type, and electrolyte concentration. The study achieved a PVA microplastic removal efficiency of 93.84% at an electrolysis time of 40 min, with a voltage of 10 V at pH 3, using a 0.01 M NaCl electrolyte solution, as determined by gravimetric analysis. UV–vis yielded a PVA microplastic removal efficiency of 99.52%. Application to synthetic laundry pod samples resulted in a PVA microplastic removal efficiency of 81.97% as determined by UV–vis analysis.
Optimization and Stability Assessment of Chitosan/PVA Smart Sensor Films Incorporated with Roselle Anthocyanins for Real-Time Visual Monitoring of Chicken and Shrimp Freshness under Different Storage Conditions Hidayaty, Alfianita Nuril; Fiddaroini, Saidun; Fahmi, Ahmad Luthfi; Fardiyah, Qonitah; Sabarudin, Akhmad
Science and Technology Indonesia Vol. 11 No. 1 (2026): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2026.11.1.217-234

Abstract

The development of intelligent packaging systems has become a promising approach to ensure food safety and quality by enabling real-time freshness monitoring. In this study, chitosan/polyvinyl alcohol (Cs/PVA)-based smart sensor films incorporated with roselle (Hibiscus sabdariffa L.) anthocyanins were fabricated and optimized for the visual detection of chicken and shrimp spoilage under variations storage. Anthocyanins were extracted from fresh roselle petals through different maceration periods (R1–R5) to investigate their influence on film properties. Physicochemical characterization revealed that extended maceration enhanced anthocyanin loading, leading to increased film thickness, higher color saturation, and improved optical responsiveness. FESEM micrographs demonstrated homogeneous polymer matrices at lower anthocyanin concentrations, while higher loadings induced micro-aggregates that enhanced volatile adsorption and sensing sensitivity. The fabricated films exhibited clear and progressive color transitions aligned with the spoilage process: red–purple at fresh conditions (pH 5–6), brown–green at intermediate spoilage (pH 7–9), and yellow–brown at advanced spoilage (pH ≥10), consistent with anthocyanin structural transformations. Storage trials with chicken and shrimp confirmed that the Cs/PVA–R5 film displayed the intense coloration and strong response to volatile amines such as ammonia, trimethylamine, and dimethylamine, enabling reliable freshness monitoring. Importantly, the films provided a visual indication when the pH exceeded the edibility threshold of 7.0–7.5, beyond which the samples were deemed unsuitable for consumption. Overall, this work demonstrates the potential of Cs/PVA–roselle anthocyanin films as eco-friendly, low-cost, and effective smart indicators for meat and seafood freshness, offering a practical platform for intelligent food packaging applications.
Studi Pemanfaatan Pupuk Organik Cair dari Air Lindi TPA Tlekung Kota Batu dengan menggunakan Ecoenzyme sebagai Biodegradasi Logam Berat (Pb, Cu) Astuti, Luluk Indri; Srihardyastutie, Arie; Fardiyah, Qonitah
Jurnal Penelitian Pendidikan IPA Vol 11 No 2 (2025): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i2.3466

Abstract

Leachate is water produced from the waste processing process at the final disposal site (TPA). Leachate contains various organic substances, so many local people use leachate as fertilizer. However, on the other hand, leachate contains heavy metals. As an effort to reduce the content of heavy metals such as Pb and Cu, biological remediation techniques are used by adding ecoenzymes. This study aims to determine the effectiveness of ecoenzymes on leachate at the Tlekung TPA, Batu City. Leachate at the inlet point of Tlekung Landfill, Batu City was taken as much as 20 liters and the volume of ecoenzyme was varied, namely P1 (leachate 1000 ml), P2 (leachate 1000 ml + 1 ml ecoenzyme), P3 (leachate 1000 ml + 5 ml ecoenzyme), P4 (leachate 1000 ml + 10 ml ecoenzyme), P5 (leachate 1000 ml + 15 ml ecoenzyme). The research stages were carried out by testing the pH using a pH meter, testing the number of colonies using the Total Plate Count (TPC) method, testing the levels of lead (Pb) and copper (Cu) using the AAS method. The results showed that the addition of ecoenzyme to leachate affected the pH value, increased the number of colonies and decreased the levels of Pb and Cu metals. The addition of 10 mL of ecoenzyme in 1000 ml of leachate in the P4 treatment could increase the number of colonies and reduce the levels of Pb and Cu.
Co-Authors Akhmad Sabarudin An-Nufuus, Digwanggi Arum Tazkiyatu Anggraini, Vita Dwi Ani Mulyasuryani Arie Srihardyastutie Arini Sugiarti Arumdati, Rara Aulia Asdauna Asdauna Asdauna, Asih Hajaranti Astuti, Luluk Indri Atikah . Atikah Atikah Atikah, Atikah, Atikah Atikah, atikah Barlah Rumhayati Barlah Rumhayati Daninda, Mahani Diah Mardiana Djatmika, Rosalina Fahmi, Ahmad Luthfi Fahrana Salas Trenggamayu Nelgi Faiza, Nur Febriyanti, Sita Fiddaroini, Saidun Fredy Kurniawan Gunawan, David Hermin Sulistyarti Hermin Sulistyarti Hermin Sulistyati Hidayaty, Alfianita Nuril Hulwati, Siti Ika Rosemiyani Ika Rosemiyani Ilham Krisdarmawan Putra Isa, Illyas Md Karlinda Karlinda Kusumaningtyas, Nadia Mira Layta Dinira Linda Noviana Maulidah, Fajar Rizqy Maulidyawati, Titin Mochammad Imron Awalludin Nugraha, Hedhi Setya Puspitaningrum, Shanti Putra, Bhurman Pratama Rahadian Zainul Rahmawati, Alif Faiza Ramadani, Azaria Ivana Regina Tutik Padmaningrum Rivaatun Dwi N Dwi N. Roisatul Hasanah Sabarudin, Akhmad Sanawi, Dede Ardiansyah Takdir Abubakar Setyorini, Dian Ayu Silzha Eka Prasetya Irawan Sita Febriyanti Sunarto Sunarto Suyanta Suyanta Syafira Ayu Deviana Syarifah, Nidatul Thahir, Firda Syawalina Ulfa Andayani, Ulfa Wijanarko, Aris Wijaya, Khalida Yofandi, Muhammad Farrel Yuniar Ponco Prananto