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All Journal CHEESA: Chemical Engineering Research Articles Jurnal Sains dan Teknologi Jurnal Bakti Nusantara
Devi Lestari
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary Other

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Pengaruh Ekstraksi SiO2 dari Lumpur Lapindo Terhadap Daya Adsorpsinya pada Larutan Metil Orange Ulfindrayani, Ika Fitri; Ikhlas, Nurani; A'yuni, Qurrota; Fanani, Nurull; Gaol, Binaria Lumban; Lestari, Devi
CHEESA: Chemical Engineering Research Articles Vol. 2 No. 2 (2019)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.736 KB) | DOI: 10.25273/cheesa.v2i2.5108

Abstract

Metil orange merupakan salah satu zat warna yang banyak digunakan di industri tekstil. Metil orange ini tergolong ke dalam zat warna yang berbahaya bagi lingkungan. Salah satu metode yang baik digunakan untuk mengurangi bahaya dari metil orange yaitu metode adsorpsi. SiO2 diketahui memiliki sifat adsorben yang baik karena memiliki struktur dan sifat permukaan yang stabil terhadap bahan kimia. Lumpur Lapindo merupakan salah satu sumber SiO2 yang keberadanya melimpah. Kandungan SiO2 pada Lumpur Lapindo yakni sebesar 55%. Tingginya kandungan SiO2 dalam Lumpur Lapindo, membuat lumpur lapindo memiliki daya adsorpsi yang baik. Pada penelitian ini Lumpur Lapindo digunakan sebagai adsorben untuk metil orange. Proses adsorpsi dilakukan dengan metode batch. Lumpur Lapindo dipreparasi terlebih dahulu untuk mengetahui pengaruhnya terhadap daya adsorpsi pada Metil orange. Preparasi dilakukan dengan ekstraksi SiO2 dari Lumpur Lapindo menggunakan metode kopresipitasi yang dapat meningkatkan kemurnian SiO2 dari 50% menjadi 78,6%. SiO2 hasil ekstraksi memiliki %removal dan kapasitas adsorpsi yang lebih tinggi dibandingkan dengan lumpur Lapindo masing-masing sebesar 81,39% dan 0,081mg/g.
Analisis Kualitas Air Hygiene Sanitasi Secara Fisika dan Kimia di Perumahan Green View Sunggal Devi Lestari; Imas Masriah; Sulwiyatul Kamariah Sani; Siti Mahmudha; Adelia Yesya Putri Hasibuan
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5309

Abstract

This study analyzed the quality of borehole water in Green View Sunggal Housing located in a rice field area. This research used a descriptive analytical method with a cross-sectional design. Samples were taken from 25 boreholes through a purposive sampling technique divided into three zones: north (8 wells), middle (7 wells), and south (10 wells). The parameters evaluated included physical aspects (temperature, odor, taste, color, turbidity) and chemical aspects (pH, hardness, Fe, Mn, nitrate, nitrite, chloride). Laboratory analysis was carried out at the Medan State Polytechnic following SNI standards and the APHA method, with statistical analysis using SPSS for Pearson correlation and linear regression. The results showed that the majority of parameters met the standards of Permenkes No. 32 of 2017. The parameters of temperature, odor, taste, hardness, manganese, nitrate, nitrite, and chloride reached a compliance level of 100%. However, there were discrepancies in color (92%), turbidity (84%), pH (64%), and iron content (80%). Samples from the southern zone adjacent to rice fields within a 200-meter radius showed significant problems with acidic pH (5.8-6.4) and excessive iron content (1.12-1.42 mg/L). Statistical analysis revealed significant correlations between well depth, distance from rice fields, and water quality. Distance from rice fields was the strongest predictor for nitrate (R² = 0.475) and iron (R² = 0.374). The study concluded that better environmental management is needed to maintain and improve water quality in the residential area.
A Review of Maghemite Nanoparticles as Environmental Sensors Imas Masriah; Devi Lestari; Prisca Caesa Moneteringtyas; Siti Mahmudha; Sulwiyatul Kamariyah Sani
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5354

Abstract

The increasing urgency to monitor and mitigate environmental pollution has driven significant interest in the development of advanced sensing technologies. Nanotechnology presents promising solutions through the application of nanoscale materials, among which maghemite nanoparticles (γ-Fe2O3) have garnered considerable attention due to their unique physicochemical properties, high chemical stability, a large specific surface area, and superparamagnetic behavior, making them suitable for separation, target deployment, and sensor regeneration. It functionalized maghemite nanoparticles to enhance their selectivity toward specific pollutants, including heavy metals ( e.g., Pb2+ and Cd2+) and toxic gases (e.g., NO, NH3, and H2S). These articles present a review of the structural and physicochemical characteristics of maghemite nanoparticles, including commonly applied synthesis methods, sensor mechanism, and their applications in pollutant detection, such as heavy metals and toxic gases. The review also highlights current challenges and outlines future directions for the development of more efficient, affordable, and sustainable maghemite-based sensors for next-generation environmental monitoring systems.
Evaluating the Potential of Modified Niobium (V) Oxide as Catalyst for 5-Hydoxymethylfurfural (HMF) Production : A Literature Review Inten Pangestika; Imas Masriah; Devi Lestari; Ayu Syufiatun Br Tarigan; Pina Budiarti Pratiwi
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5385

Abstract

Selectively producing 5-hydroxymethylfurfural (HMF) from biomass-derived carbohydrates is key in valorizing renewable resources into biobased chemicals and fuels. HMF is a crucial bio-based platform chemical, but its selective production from glucose and fructose remains challenging due to side reactions and product degradation. Modified niobium(V) oxide (Nb2O5) catalysts have shown great promise owing to their intrinsic Brøntsted and Lewis acidity, thermal stability, and surface tunability. This review overviews recent advances in catalyst design, including metal doping, structural tuning, and hybridization with porous materials. These have significantly improved HMF yields -up to 80%- while enhancing catalyst selectivity and reusability. A systematic review with a descriptive-analytical approach was applied, analyzing literature from 2015 to 2025 across major scientific databases. Furthermore, challenges, including side-product formation and active site leaching, are highlighted alongside future perspectives for scalable and green HMF synthesis using Nb-based catalysts. This review aims to guide the rational development of modified Nb2O5 catalysts for efficient biomass transformation. These developments are crucial for advancing Nb-based catalytic platforms and unlocking the full potential of HMF in a circular, bio-based chemical industry.
Fitoremediasi In Vitro Logam Pb dan Cu Menggunakan Eceng Gondok (Eichhornia crassipes): Strategi Ramah Lingkungan dan Berkelanjutan Siti Mahmudha; Fajar Nugraha; Muhammad Idris; Imas Masriah; Devi Lestari
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5459

Abstract

Heavy metal contamination, especially by lead (Pb) and copper (Cu), is a major environmental issue in aquatic ecosystems caused by industrial, mining, and agricultural activities. These metals are toxic, persistent, and bioaccumulative, posing risks to aquatic life and human health. Various remediation methods have been developed, including physical, chemical, and biological approaches; however, their effectiveness on a large scale remains limited. This study explores the potential of Eichhornia crassipes (water hyacinth) for in vitro phytoremediation of Pb and Cu. Plants were grown in Hoagland solution containing 100 mg/L of each metal. Metal accumulation in plant tissues was measured using Atomic Absorption Spectroscopy (AAS), and chlorophyll content was analyzed with a UV-Vis spectrophotometer. The results showed that Pb primarily accumulated in the roots, while Cu was more translocated to the leaves. Chlorophyll levels decreased more significantly in Cu-treated plants, indicating higher stress. These findings suggest that E. crassipes is a promising, cost-effective, and environmentally friendly option for the remediation of heavy metal-contaminated waters. The implementation of this technology could contribute to improving environmental quality and reducing the risk of heavy metal exposure to both ecosystems and human health.
Edukasi Dampak Negatif Penggunaan Vape bagi Remaja di Desa Banyumas Stabat, Langkat, Sumatera Utara Miswanda, Dikki; Lestari, Devi; Masriah, Imas; Sebayang, Alexander
Jurnal Bakti Nusantara Vol. 2 No. 3 (2025): Jurnal Bakti Nusantara
Publisher : Pustaka Media Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63763/jbn.v2i3.90

Abstract

Penggunaan rokok elektrik atau vape semakin meningkat di kalangan remaja di Indonesia termasuk di wilayah pedesaan. Kurangnya pemahaman masyarakat mengenai bahaya vape menjadi tantangan serius dalam upaya pencegahan dampak kesehatan yang panjang. Kegiatan pengabdian masyarakat ini bertujuan untuk mengidentifikasi tingkat pemahaman masyarakat Desa Banyumas, Kecamatan Stabat, terhadap bahaya penggunaan vape bagi kesehatan. Edukasi dilakukan melalui pendekatan partisipatif yang melibatkan peserta secara aktif dalam ceramah dan diskusi interaktif. Hasil kegiatan menunukkan adanya peningkatan pengetahuan peserta sebesar rata-rata 49,8% yang diukur melalui pre-test dan post-test. Selain itu, perubahan sikap positif juga teridentifikasi, dengan 85% remaja menyatakan komitmen untuk menghindari penggunaan vape. Pendekatan partisipatif dan kontekstual terbukti efektif dalam meningkatkan kesadaran risiko kesehatan di tingkat desa. Temuan ini menegaskan pentingnya strategi edukasi berbasis komunitas dalam upaya pencegahan penggunaan vape di lingkungan masyarakat.
Co-Authors A'yuni, Qurrota Adelia Yesya Putri Hasibuan Alexander Sebayang Ayu Syufiatun Tarigan Dikki Miswanda Erlinda Ningsih Ningsih Fajar Nugraha Gaol, Binaria Lumban Ika Fitri Ulfindrayani Imas Masriah Inten Pangestika Muhammad Idris NUNIK ARDIANA Nurani Ikhlas Pina Budiarti Pratiwi Prisca Caesa Moneteringtyas Roslian Lubis Siti Mahmudha Sulwiyatul K Sani