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All Journal Eksergi: Chemical Engineering Journal KOVALEN: Jurnal Riset Kimia JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Sains dan Teknologi Reaksi International Journal of Applied Technology Research Jurnal Difusi Industrial Research Workshop and National Seminar Journal Serambi Engineering (JSE) Sainteknol : Jurnal Sains dan Teknologi Journal of Green Science and Technology
Paramitha, Tifa
Politeknik Negeri Bandung
Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Sintesis dan Karakterisasi Semikonduktor TiO2 Doping Magnesium dengan Metode Hidrotermal: Synthesis and Characterization of Magnesium Doped TiO2 Semiconductor by Hydrothermal Method Tika Paramitha; Khoirunnisa Utami; Yuki Martha Anggraini; Tifa Paramitha
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 1 (2023): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i1.16275

Abstract

Semiconductors are materials that range between insulators and conductors in terms of conductivity value. Titanium Dioxide (TiO2) is a semiconductor that is widely applied to various things. TiO2 has the benefits, such as being environmentally stable and inexpensive. TiO2 is photoactive in the range of ultraviolet radiation due to the band gap value of 3.2 eV. However, ultraviolet is only produced from 5% of sunlight. The research aimed to narrow the band gap energy so as to maximize light absorption. This is done by modification with the addition of Mg elements to TiO2 materials at different mass variations of Mg (1%, 1.5%, 2%) to the mass of TiO2 which is often referred to as doping. TiO2 was doped by Mg using a hydrothermal method for 24 hours with a temperature of 180áµ’C, followed by 2 hours of calcination at 400áµ’C. Then, TiO2 and Mg-doped TiO2 particles were characterized by SEM-EDX, FTIR, and UV-Vis. Based on the results of TiO2 and Mg-doped TiO2 particle characterization using SEM, both particles are spherical in shape. The success of Mg doping was identified from the data of EDX characterization, which revealed that the mass % of the Mg component increased with the greater Mg doping concentration on TiO2 particles. There was no structural change following Mg doping on TiO2 particles, as evidenced by the same peak based on the results of FTIR characterization of TiO2 and Mg-doped TiO2 particles. Moreover, a 2% Mg mass doping on pure TiO2 resulted in a decrease in band gap energy to 3.16 eV, in which the pure TiO2 was 3.39 eV. The mass doping of Mg on TiO2 required further optimization to obtain the maximum band gap energy reduction for photocatalytic applications.
Turmeric (Curcuma longa) Extract Characterization for Corrosion Inhibitor using Microwave-Assisted Extraction Tifa Paramitha; Angely Luviana; Angelina Putri; Randi Reynaldi; Rafila Chika Azzahra; Tika Paramitha; Rony Pasonang Sihombing
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 1 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i1.79249

Abstract

Metallic corrosion, the deterioration process induced by the interaction between metals and corrosive environments, poses a significant challenge to material integrity and longevity. Corrosion inhibitors have been identified as an effective approach among various mitigation strategies. Natural extracts, such as those derived from turmeric/Curcuma longa, have garnered attention for their potential as eco-friendly corrosion inhibitors. This study endeavors to extract, characterize, and evaluate turmeric extract's efficacy as a corrosion inhibitor within a 30% acetic acid solution. Employing microwave-assisted extraction with a 96% ethanol solvent facilitated the isolation of the extract, which was subsequently subjected to qualitative analysis through phytochemical screenings and Gas Chromatography-Mass Spectrometry (GC-MS). These analyses confirmed the presence of antioxidative phytochemicals, including alkaloids, terpenoids, turmeronoids, curcumin, sesquiterpenoids, and phenols. The corrosion inhibitory properties of turmeric extract were assessed via immersion and flow loop experiments, revealing a notable reduction in corrosion rates—from 0.1540 mm/year to 0.0801 mm/year in immersion tests and from 5.3747 mm/year to 2.9369 mm/year in flow loop tests. Such outcomes underscore turmeric extract's potential as a viable corrosion inhibitor, attributed primarily to the chemical interactions facilitated by curcumin's phenolic and carbonyl groups with the metal surface, thereby enhancing protective efficacy. The inhibitor efficiency was quantified at 47.9743% and 45.3565% for immersion and flow loop tests, highlighting the extract's substantial inhibitory performance.
Utilization Of Sengon Wood Sawdust Waste as Esterified Cellulose-Based Bioadsorbent for CD(II) Wastewater Purification Rizky Fauzan; Nisa Rahmah Mujahidah; Teguh Aditya Nugraha; Nasya Azzahra; Tifa Paramitha; Bambang Soeswanto; Rony Pasonang Sihombing
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10650

Abstract

Cadmium (Cd) is a heavy metal with high toxicity that can enter the body through contaminated food chains, so wastewater containing cadmium needs to be treated before being discharged into the environment. This study uses adsorption methods to reduce Cd(II) concentration in artificial wastewater by utilizing modified sengon wood sawdust cellulose as a bioadsorbent. Adsorption tests were conducted in batch mode at room temperature with constant stirring, and the results were analyzed using AAS. The objective of this study was to determine the optimum adsorption conditions using Response Surface Methodology (RSM) and to determine the adsorption capacity of the modified bioadsorbent based on the Freundlich or Langmuir adsorption isotherm models. The variations in bioadsorbent dose in this study were 2, 4, and 6 g/L; adsorption time variations were 30, 60, and 90 minutes; pH variations were 3, 4, and 5. Based on the design expert 13 RSM software, the optimum adsorption conditions for citric acid-modified bioadsorbent are a bioadsorbent dose of 3.957 g/L, time of 31.655 minutes, and pH of 4.968. For the EDTA-modified bioadsorbent, the optimum conditions were a bioadsorbent dose of 3.836 g/L, time of 30 minutes, and pH of 4.708. The results of the adsorption isotherm modeling indicate that the citric acid-modified and EDTA-modified bioadsorbents are more suitable for the Freundlich isotherm model due to their higher determination coefficient (R²). Thus, the adsorption capacities for the citric acid-modified and EDTA-modified bioadsorbents were determined to be 1.7828 mg/g and 1.5776 mg/g, respectively.
Anodizing Characterization of Aluminum 1100 Composition of Sulfuric Acid - Oxalic Acid 16% With Aeration and Nonaeration at Different Time Intervals Nurcahyo Nurcahyo; Rian Muhamad Rizky; Mangku Joyo Diningrat; Synbi Pasya Octaviarine Adihartanto; Tira Nur Khoirunisa; Tifa Paramitha
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10653

Abstract

Aluminum is a type of metal that is widely used in the industrial and household fields. This study aims to analyze the effect of variations in sulfuric acid and oxalic acid concentrations, as well as aeration systems, on the surface characteristics of aluminum 1100 through the anodizing process. The anodizing process is one of the surface treatment processes that is carried out with the aim of improving or improving the properties of a metal, including resistance to wear, increasing hardness, and aiming to beautify the appearance itself. This anodizing test is with sulfuric acid-oxalic acid electrolyte solution, electrolyte concentration 16%, at room temperature with a current density of 3/dm2 in time intervals of 20 minutes and 30 minutes. The data obtained from the test results showed that the oxide layer was formed maximally in the aeration system with a concentration of 13.5+2.5 and a time interval of 30 minutes of 0.0411 gr. This shows that the addition of oxalic acid and oxygen can accelerate the formation of the oxide layer. At electrolyte concentrations of 16+0, 15.5+0.5, 15+1, 14.5+1.5 and 14+2, there was an increase in the difference in oxide mass by 0.0337 gr, 0.0335 gr, 0.0366 gr, 0.0390 and 0.0411 gr.
Effectiveness Of Activated Carbon Of Reed (Imperata Cylindrica) As Methyl Orange Bioadsorbent with Batch Adsorption Method Dian Ratna Suminar; Dicky Harianto; Najmi Fauziah; Dea Tri Febrian; Luthfiana Kharisma; Tifa Paramitha
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10655

Abstract

The use of synthetic textile dyes causes environmental problems, namely the waste produced is still colored and difficult to degrade. Methyl orange is a synthetic dye in the textile industry which has low solubility in water, is difficult to degrade, has the potential to be carcinogenic and is toxic. To overcome this, adsorption can be carried out using activated carbon from reeds. This research aims to find out how active carbon of reeds is absorbed in methyl orange using the batch method with Langmuir isotherm analysis. Research methods include pretreatment of reeds, manufacture and activation of reeds carbon, testing the characteristics of activated carbon, adsorption process, and analysis of adsorption results using a UV-Vis spectrophotometer. The research was carried out by varying the concentration of methyl orange solution, adsorption time, and mass of activated carbon used. From the research, optimum conditions were obtained for the methyl orange adsorption process using reed activated carbon for 120 minutes with an activated carbon mass of 0.3 grams, a final concentration of 7.328 ppm was obtained with an initial concentration of 10 ppm, and a % adsorption of 26.72%.
The Effect of Coconut Shell Activated Carbon Dosage on the Removal of Remazol Brilliant Blue R Alya Zettira Sayyida Sulaeman; Deika Irham Faza Al-Ghaniy; Herawati Budiastuti; Tifa Paramitha
Jurnal Serambi Engineering Vol. 11 No. 3 (2026): Juli 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

Abstract

Textile wastewater contains Remazol Brilliant Blue R (RBBR), a persistent synthetic dye that is difficult to degrade naturally. This study aimed to characterize coconut-shell activated carbon, determine the most effective adsorbent dose and contact time for RBBR removal, and evaluate Pseudo First Order (PFO) and Pseudo Second Order (PSO) kinetic models. The activated carbon was prepared by carbonization at 700°C for 2 h followed by activation with 10% (w/v) H₃PO₄ for 24 h. Batch adsorption used 100 mL of 50 ppm RBBR at adsorbent doses of 0.5–5 g/L and contact times of 5–60 min at 150 rpm. Adsorbent quality was evaluated according to SNI 06-3730-1995 and RBBR concentration was determined by UV–Vis spectrophotometry at λmax 630 nm. All activated-carbon quality parameters met the standard: moisture 4.52%, ash 2.33%, volatile matter 2.60%, fixed carbon 90.55%, and iodine number 856.58 mg/g. The highest Run-2 removal efficiency was 41.68% at 3 g/L and 60 min, leaving 29.2 ppm RBBR. Neither kinetic model consistently described all doses because qt fluctuated with contact time. PFO showed the highest fit at 4 g/L (R²=0.978), while PSO was highest at 5 g/L (R²=0.851). At the optimum dose of 3 g/L, PSO yielded R²=0.447 and was therefore insufficiently representative. The adsorption behavior was also affected by mass transfer and intraparticle diffusion.
Continuous Adsorption of and Cr (VI) Using a KOH-activated Corn Cob Carbon-Coal Fly Ash Composite Rony Sihombing; Alfiana Adhitasari; Shoerya Shoelarta; Tifa Paramitha; Ghaniari Putri; Khumaira Maulani Wijaya
Sainteknol : Jurnal Sains dan Teknologi Vol. 24 No. 2 (2026): December 2026 (In Press)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v24i2.63139

Abstract

Industrial wastewater containing divalent cadmium (Cd₂⁺) and hexavalent chromium (Cr (VI)) poses a serious environmental threat because of the toxicity, persistence, and bioaccumulative nature of these heavy metals. This study aimed to evaluate the performance of a composite adsorbent, prepared from KOH-activated corn cob carbon (CCAC) and calcined coal fly ash (FA) at a mass ratio of 5:1, for the continuous adsorption of Cd₂⁺ and Cr (VI). The adsorbent was characterized using Fourier Transform Infrared (FTIR) spectroscopy, while continuous adsorption experiments were performed in an up-flow acrylic column at an initial metal concentration of 100 mg/L, evaluating the effect of flow rate (5–25 mL/min) on Cd₂⁺ removal and comparing it with Cr (VI) removal from real industrial wastewater at 5 mL/min. FTIR analysis confirmed that KOH activation and calcination modified the surface functional groups of the CCAC and FA, respectively, increasing the availability of oxygen-containing active sites. The composite adsorbent achieved a high and consistent Cd₂⁺ removal efficiency of 91.13–91.51%, with an adsorption capacity of 4.18–4.19 mg/g, across all tested flow rates. In contrast, Cr (VI) removal was very low (0.797%), attributed to electrostatic repulsion between the anionic Cr (VI) species and the negatively charged adsorbent surface at near-neutral pH, as well as competition from co-existing ions in the real wastewater matrix. These findings indicate that the FA/CCAC composite is a promising, low-cost, waste-derived adsorbent for continuous Cd₂⁺ removal, while further surface modification or pH adjustment is required to enhance its performance for Cr (VI) removal.
Study on the Effectiveness of H₂SO₄ Activated Coffee Grounds and Imperata cylindrica Bioadsorbents for Methylene Blue Adsorption Unung Leoanggraini; Tifa Paramitha; Rahma Ardelia Raissa; Mutiara Nur Annisa; Muhammad Salman Alfarisi; Radianti Novita Sari; Rony Sihombing
Sainteknol : Jurnal Sains dan Teknologi Vol. 24 No. `1 (2026): `June 2026
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v24i`1.63663

Abstract

Textile wastewater with methylene blue dye causes serious environmental issues because of its toxicity, persistence, and negative effects on aquatic life. Using agricultural waste as bioadsorbents provides a sustainable and low-cost way to remove dye from wastewater. The goal of this study was to assess how effective H₂SO₄-activated bioadsorbents made from coffee grounds and Imperata cylindrica are for methylene blue adsorption in batch systems. We prepared the bioadsorbents by carbonizing them at 450°C, followed by chemical activation with 2 M sulfuric acid. We characterized them using FTIR and SEM to study functional groups and surface shape. We conducted batch adsorption experiments by changing the adsorbent mass (0.15–0.3 g), contact time (30–120 minutes), and methylene blue concentration (10–100 mg/L). Langmuir and Freundlich isotherm models were used to evaluate the adsorption behavior. The results showed that activated coffee grounds and Imperata cylindrica had improved porosity and changes in functional groups after activation. The best adsorption conditions were found with an adsorbent mass of 0.3 g, a contact time of 120 minutes, and a methylene blue concentration of 10 mg/L, reaching an adsorption efficiency of up to 97.498%. The adsorption process fit the Langmuir isotherm model better, with maximum adsorption capacities of 42.735 mg/g for coffee grounds and 13.210 mg/g for Imperata cylindrica. These findings suggest that coffee grounds and Imperata cylindrica are promising, cost-effective bioadsorbents for removing methylene blue in textile wastewater treatment.
Co-Authors -, Alfiana Adhitasari Agustin, Delliana Aji, Restu Alatif, Ikhsan Akmal Alfiana Adhitasari Alfiana Adhitasari Alya Zettira Sayyida Sulaeman Amelia Nur Aliah Andrijanto, Eko Angelina Putri Angely Luviana Arijan Vevayose Tarigan Azzahra, Rafila Chika Bambang Soeswanto Bambang Soeswanto binti Jamaluddin, Jamarosliza Dea Tri Febrian Deika Irham Faza Al-Ghaniy Dicky Harianto Dwi Irmawati, Dwi Elizabeth, Lidya Endang Kusumawati Endang Kusumawati Gamaliel Tanaka Ghaniari Putri Hariyadi, Tri Herawati Budiastuti Hidayatulloh, Irwan Irianto, Indra Jayanti, Retno Dwi Khoirunnisa Utami Khumaira Maulani Wijaya Lestari Herlianti Putri Luthfiana Kharisma Luviana, Angely Malik, Dava Maulana Manfaati, Rintis Mangku Joyo Diningrat Muhammad Misbahussalam Muhammad Salman Alfarisi Mukhtar Ghozali Mutiara Nur Annisa Najmi Fauziah Nasya Azzahra Ngatin, Agustinus Nidaulhusna, Anisa Nirmala Utami Nisa Rahmah Mujahidah Nurbaits, Alisya Nurcahyo Nurcahyo Nurhasanah, Santy Nurul Annisa Nurulgina, Rahma Permatasari, Rahma Puspa Putri, Angelina Rachmawati, Anissa Nurul Radianti Novita Sari Rafila Chika Azzahra Rahma Ardelia Raissa Rahma Ardelia Raissa Rahmawati, Sri Puji Ramadhan, Muhammad Zikri Ramadhani, Laily lsna Randi Reynaldi Retno Indarti Reynaldi, Randi Rian Muhamad Rizky Rivaldo Rofie Fauzi Budiman Rizky Fauzan Rizky Setianto Robby Sudarman Rony Pasonang Sihombing rony sihombing Rusdianasari Rusdianasari Sabinna Azahra Sulaeman Salsabila, Iva Najwa Salsabila, Salwa Ainaya Salsabila, Shafira Salsabilla, Iva Najwa Setiawan, Kiranna Shalmadevy Shafira Yulianthina Shoerya Shoelarta Sihombing, Rony Sihombing, Rony Pasonang Suminar, Dian Ratna Suryadi, Joko Synbi Pasya Octaviarine Adihartanto Teguh Aditya Nugraha Teguh Aditya Nugraha Tika Paramitha Tika Paramitha Tika Paramitha Tira Nur Khoirunisa Tri Reksa Saputra Trirahayu, Dhyna Analyes Unung Leoanggraini Yuki Martha Anggraini Yusuf, Yusmardhany Zahwa, Keisya Adellia