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All Journal Program Kreativitas Mahasiswa - Penelitian Jurnal Fisika Unand Jurnal Riset Kimia Jurnal Litbang Industri Jurnal Zarah ALCHEMY Jurnal Penelitian Kimia Jurnal Kesehatan Medika Saintika Indonesian Journal of Chemistry Proceedings of the 1st UR International Conference on Educational Sciences Jurnal Hilirisasi IPTEKS (JHI) Eksakta : Berkala Ilmiah Bidang MIPA Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Hydrogen: Jurnal Kependidikan Kimia Jurnal Litbang Industri Journal of Educational Sciences Jurnal Katalisator Jurnal Kimia Unand Jurnal Akademika Kimia
Deswati Deswati
Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Andalas
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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Karbon Aktif Berpori dari Kulit Jeruk (Citrus Sinensis (L.) Osbeck) Melalui Metoda Dehidrasi untuk  Kapasitor Elektrokimia Tetra, Olly Norita; Aziz, Hermansyah; Deswati, Deswati; Aghna Kamiko, Awfa Joti
Jurnal Zarah Vol. 12 No. 1 (2024): April, 2024
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/v53p4749

Abstract

Limbah kulit jeruk (Citrus sinensis (L.) Osbeck)  adalah precusor karbon aktif yang ramah lingkungan dan ekonomis untuk bahan elektroda kapasitor elektrokimia. Pada penelitian ini kulit jeruk telah dimanfaatkan sebagai precusor karbon aktif berpori melalui metoda dehidrasi dengan H2SO4 dan penambahan aktivator KOH pada suhu karbonisasi 400°C.  Karbon aktif yang dihasilkan terdiri dari karbon (71,42%) dan oksigen (28,58%), dengan volume pori  adalah   0,04281 cm³/g, diameter pori   2,57 nm  dan luas permukaan 140 m2/g dengan struktur dominan mesopori dan sedikit mikropori. Kinerja kapasitor elektrokimia dengan menggunakan karbon aktif dari kulit jeruk mencapai 10,75 mF dengan jumlah elektron 647,365 x 1015 elektron pada kondisi luas permukaan elektroda 3x3 cm2, ketebalan elektroda 0,15 cm dan elektrolit H3PO4 0,3 N. Hasil penelitian ini menunjukkan bahwa sintesis karbon aktif kulit jeruk melalui dehidrasi asam memberikan keuntungan dalam segi efisiensi biaya, waktu  dan proses preparasi  untuk menghasilkan karbon aktif  berpori dengan luas permukaan yang tinggi sebagai kapasitor elektrokimia berkinerja tinggi.
Koagulasi Ramah Lingkungan Dengan Kapur Sirih (Ca(Oh)₂) untuk Penghilangan Mikroplastik Pada Ikan Bilih (Mystacoleucus Padangensis) Dari Danau Singkarak, Wilayah Tanah Datar, Sumatera Barat, Indonesia Putra, Zaki Aiwa; Deswati, Deswati; Zein, Rahmiana
Jurnal Zarah Vol. 13 No. 2 (2025): October, 2025
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v13i2.7641

Abstract

Kapur sirih (Ca(OH)₂) diteliti sebagai koagulan anorganik yang tersedia secara lokal dan ramah lingkungan untuk mengurangi kontaminasi mikroplastik pada ikan bilih (Mystacoleucus padangensis) dari Danau Singkarak, Tanah Datar, Sumatera Barat, Indonesia. Studi ini mengevaluasi efisiensi koagulasi, kondisi operasi optimal, dan mekanisme yang mendasari. Penghilangan optimal dicapai pada konsentrasi koagulan 5%, waktu kontak 60 menit, dan kecepatan pengadukan 300 rpm. Penambahan 5% NaCl secara signifikan meningkatkan kemampuan pengurangan mikroplastik, mencapai efisiensi hingga 70,73%. Analisis morfologis dengan Scanning Electron Microscopy (SEM) menunjukkan pembentukan gumpalan besar, mengindikasikan interaksi fisik antara mikroplastik dan endapan kalsium hidroksida. Penurunan nilai zeta potensial setelah koagulasi menunjukkan netralisasi muatan yang efektif dan destabilisasi koloid. Hasil ini menyoroti kapur sirih sebagai koagulan yang menjanjikan, berbiaya rendah, dan berkelanjutan untuk mengurangi polusi mikroplastik di lingkungan air tawar, terutama di daerah danau.
Sintesis Karbon Aktif dari Tongkol Jagung (Zea mays L.) dengan Metoda Dehidrasi sebagai Elektroda Superkapasitor Olly Norita Tetra; Raihan Hanif Aulia; Deswati Deswati
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 2 (2025): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.2.96235.358-368

Abstract

Karbon aktif dari limbah tongkol jagung (Zea mays L.) telah disintesis dengan metoda dehidrasi untuk digunakan sebagai bahan elektroda superkapasitor. Bubuk tongkol jagung didehidrasi dengan H2SO4 1 M dan diaktivasi dengan KOH 5 M pada perbandingan massa karbon dan aktivator 1:2,5, dilanjutkan dengan karbonisasi pada 400 °C selama 1 jam. Hasil karakterisasi SEM menunjukkan terjadinya pembentukan pori pada permukaan karbon aktif dan hasil EDX memberikan persentase karbon 76,99%. Berdasarkan metode isoterm adsorpsi-desorpsi menunjukkan tipe isoterm IV dan histerisis tipe H3 yang menunjukkan struktur karbon aktif adalah mesopori, dengan luas permukaan spesifik 43,176 m2/g, volume pori 0,0855 cm3/g, dan distribusi pori rata-rata adalah 3,96 nm. Pengukuran sifat elektrokimia dari karbon aktif memberikan kemampuan untuk menyimpan energi dengan nilai kapasitansi spesifik sebesar 247,53 F/g dan rapat energi adalah 123,03 Wh/kg. Hasil EIS didapatkan kurva setengah lingkaran dari plot Nyquist yang menunjukkan adanya tahanan kecil untuk transfer muatan. Sintesis karbon aktif dengan metoda dehidrasi dan aktivasi menawarkan keuntungan seperti biaya rendah, proses preparasi sederhana, dan waktu sintesis singkat dengan kinerja elektrokimia yang tinggi untuk superkapasitor.Synthesis of Activated Carbon From Corncob (Zea mays L.) by Dehydration Method for Supercapacitor Electrode. Activated carbon from corn cob waste (Zea mays L.) has been synthesized using a dehydration method as a supercapacitor electrode material. Corn cob powder was dehydrated with 1 M H2SO4 and activated with 5 M KOH at a mass ratio of carbon and activator of 1:2.5, followed by carbonization at 400 °C for 1 hour. SEM characterization showed pore formation on the surface of activated carbon, and EDX results gave a carbon percentage of 76.99%. Based on the adsorption-desorption isotherm method, the isotherm type IV and hysteresis type H3 showed that the structure of activated carbon is mesoporous, with a specific surface area of 43.176 m2/g, a pore volume of 0.0855 cm3/g, and an average pore distribution of 3.96 nm. Measurement of the electrochemical properties of activated carbon provides the ability to store energy with a specific capacitance value of 247.53 F/g, and the energy density is 123.03 Wh/kg. EIS results obtained semicircular curves of Nyquist plots, indicating a slight resistance to charge transfer. The synthesis of activated carbon by the dehydration and activation method offers advantages such as low cost, simple preparation process, and short synthesis time with high electrochemical performance for supercapacitors.
Duck Eggshell Biosorbent for Indigo Carmine Removal: Kinetic, Isotherm, and Adsorption Mechanism Studies Adewirli Putra; Wiya E. Fitri; Deswati Deswati; Desy Kurniawati; Lia Anggresani; Corry Handayani; Aster Rahayu
Jurnal Akademika Kimia Vol. 15 No. 2 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i2.pp129-141

Abstract

Synthetic dye contamination from medical laboratory wastewater poses a growing environmental challenge, particularly from compounds such as indigo carmine, which are toxic, biologically recalcitrant, and detrimental to aquatic life. This research investigated duck eggshell as an eco-friendly, low-cost biosorbent for eliminating indigo carmine from medical laboratory effluents. The biosorbent was prepared by washing, oven-drying, grinding, and mild acid activation with 0.01 N HNO₃. Batch experiments were carried out by varying both the contact duration (15–60 min) and the initial dye concentration (10–50 mg/L), with residual concentrations determined using UV-Vis spectrophotometry. Adsorption kinetics were modeled using pseudo-first-order and pseudo-second-order equations, while equilibrium data were fitted to Langmuir and Freundlich isotherms. Peak adsorption capacity reached 8.20 mg/g within just 15 minutes of contact. The pseudo-second-order model gave the superior fit (R² = 0.9989), reflecting that surface-mediated interactions govern the process, though diffusion contributions cannot be excluded. Under optimal conditions, dye removal reached 67.80%, demonstrating efficient and rapid uptake. The Freundlich isotherm provided the best fit to the equilibrium data (R² = 0.9735), indicating multilayer uptake on an energetically heterogeneous surface. Overall, duck eggshell proved to be a practical, cost-effective, and sustainable material for removing dye pollutants from wastewater in the medical sector.
DISEMINASI TEKNOLOGI PAKAN BUATAN ALTERNATIF UNTUK PENGEMBANGAN BUDIDAYA IKAN GURAME INTENSIF DALAM UPAYA MENINGKATKAN PRODUKTIVITAS PERIKANAN DI KELURAHAN LIMAU MANIS KECAMATAN PAUH KOTA PADANG Efrizal Efrizal; Nurmiati Nurmiati; Chairul Chairul; Anthoni Agustien; Suwirmen Suwirmen; Rusnam Rusnam; Deswati Deswati
Jurnal Hilirisasi IPTEKS Vol. 3 No. 1 (2020)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v3i1.347

Abstract

Lecturer and community based science and technology activities (IbDM) were carried out with the aim of disseminating technology for Gurame culture intensively in an effort to increase fisheries productivity in Limau Manis, Pauh Subdistrict, Padang City and increase the knowledge and skills of fish farmers (community) in Koto Tangah Village in the field of Gurame fish maintenance business in West Sumatra, so that they are expected to be able to carry out maintenance in a good / environmentally friendly manner. Besides this IbDM activities are also expected to be able to reduce operational costs in maintaining Nirwana Tilapia and in the end can increase the income of the farmers (community) of Limau Manis Village through the development of sustainable fish farming. To achieve optimal technology dissemination results, the main target of IbDM in Pauh Subdistrict is fish farmer groups and community leaders / leaders of Limau Manis Village who are expected to be able to motivate farmers to socialize the method of making alternative formula feeds for intensive development of Nirwana Tilapia aquaculture and environmentally friendly. The methods used in this activity are (1) counseling, with the main material: (a) providing knowledge of various kinds of raw materials that can be used for fish food, (b) providing knowledge about the preparation of artificial food formulas / compositions, ( c) provide knowledge about the process of making artificial food (d) increase public knowledge about how to store pellets that are good to be more durable and (e) provision of material on testing the quality of feed, both physically, chemically and biologically; and (2) Intensive demonstration of making alternative pellet feeds for Nirwana Tilapia aquaculture. From the results of the IbDM activity, it was found that the knowledge and skills of farmer groups in Limau Manis Sub-district, Kec. Pauh, Padang before the IbDM activities were carried out was still very low. However, the motivation or desire of the community of IbDM partner farmer groups to carry out the culture or maintenance of fish is very large. This can be seen from the desire of the IbDM partner farmer group to master the technology of making fish feed from the results of leaf waste and taro stems which are processed into flour relatively high. Furthermore, the results of IbDM activities in the community can increase the knowledge and skills of the community in finding alternative feed for fish feed so that culture activities can run well in IbDM partner areas. In order for aquaculture to run well in partner areas of IbDM, it is necessary to carry out IbDM activities continuously on the techniques of making alternative fish pellets and efficient and effective fish-raising techniques. Besides that, it needs financial support or credit by the authorities to the community or fish farmers for capital to develop their businesses.
DISEMINASI TEKNOLOGI FORMULATED DIET ALTERNATIF DALAM UPAYA MENINGKATKAN PRODUKTIVITAS BUDIDAYA IKAN NILA INTENSIF DI KOTA PADANG Efrizal Efrizal; Nurmiati Nurmiati; Chairul Chairul; Anthoni Agustien; Zuhri Syam; Suwirmen Suwirmen; Rusnam Rusnam; Deswati Deswati
Jurnal Hilirisasi IPTEKS Vol. 4 No. 4 (2021)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v4i4.534

Abstract

Fish cultivators generally experience difficulties providing quality artificial feed (pellets) due to a lack of knowledge and skills in processing technology and making alternative feeds. Besides that, the costs incurred for feed procurement are relatively large, reaching 70 - 80% of the total production costs. However, the provision of feed is often an obstacle because, in addition to the increasingly high price, the quality of available feed does not always match the nutritional needs needed by Fish. The provision of quality feed for intensively cultivated tilapia dramatically affects the resulting growth and productivity. The higher the quality of the feed, the production will also increase. One of the technologies that can be applied to overcome this problem is the manufacture of alternative formulated diets using local raw materials. The method used in this service activity is the transfer of knowledge presented in the socialization activities in the form of 1) introduction to the types of alternative fish feed ingredients sourced from the area, (2) preparation of artificial tilapia feed formulations, (3) manufacturing technology artificial feed (pellets) and 4) monitoring and assistance. The socialization was carried out in the form of a lecture and was followed by a question and answer session. The results of farmer activities recognize the types of local feed that can be used as fish feed, know the preparation of feed formulations, and alternative artificial feed manufacturing technologies. The knowledge and skills possessed by fish cultivators are expected to overcome the difficulties of fish farmers in providing feed so that fish production and cultivation business increase.
PENGELOLAAN SAMPAH PLASTIK MENJADI ECOBRICK UNTUK MENEKAN LAJU PENCEMARAN MIKROPLASTIK DI KELURAHAN KAMPUANG JUA KECAMATAN LUBUK BEGALUNG KOTA PADANG Deswati Deswati; Buty Kurnia Hamzani; Olly Norita Tetra
Jurnal Hilirisasi IPTEKS Vol. 6 No. 3 (2023)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v6i3.661

Abstract

As people's consumption levels increase, the plastic waste produced increases, so that plastic waste becomes the first environmental problem in Indonesia, especially in Kelurahan Kampung Jua Nan XX, Kecamatan Lubuk Begalung, Padang City. Plastic waste takes a long time to disintegrate and can decompose into microplastics which can be spread into soil and water. The presence of microplastics in soil and water can contaminate plants, shellfish, fish and even salt which ultimately accumulates in the human body through the food chain cycle. Therefore, a solution is needed so that the presence of plastic waste can be handled properly and carried out optimal management. One solution to utilizing plastic waste is by making ecobrick products that are useful and have high selling value and can be a livelihood opportunity. The aim of this activity is to increase public awareness and concern for the environment in order to create a clean and healthy environment through the management and processing of plastic waste. This activity was carried out in kelurahan Kampung Jua on 27 October and 9 December 2022, with the participants in this activity being PKK women from Kampung Jua Nan XX Village. The methods used were education regarding the threat of plastic and microplastic waste and training through demonstrations on making chairs from ecobricks. The results of this activity can increase public awareness of the dangers of plastic waste, limit the use of plastic bags and manage plastic waste at the source as an effort to reduce plastic waste generation and empower the community to maximizing the economic value of existing waste in a sustainable manner.
Marine Microalgae as Indicators of Heavy Metal Pollution in Coastal Ecosystems Wiya Elsa Fitri; Adewirli Putra; Syamsuardi Syamsuardi; Nofrita Nofrita; Deswati Deswati
Jurnal Kesehatan Medika Saintika Vol 16, No 2 (2025): Desember 2025
Publisher : Stikes Syedza Saintika Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30633/jkms.v16i2.30726

Abstract

Heavy-metal contamination remains a critical ecological threat in tropical coastal ecosystems, particularly along the West Coast of Sumatra, where concentrations of Pb, Cd, and Cu frequently approach or exceed biological stress thresholds. This article evaluates marine microalgae as indicators of heavy metal pollution, combining global biomarker evidence with region-specific hydrodynamic conditions, referring referring to publications from the last six years. The findings reveal strong cross-study convergence in microalgal responses, including chlorophyll degradation, photosynthetic inhibition, oxidative stress, and antioxidant enzyme activation. These biomarker patterns align closely with local observations from Sumatra, indicating that microalgae operate within exposure ranges known to induce sublethal physiological impairment. Hydrodynamic modulation driven by monsoon cycles further amplifies metal bioavailability, producing alternating acute and chronic stress regimes that chemical monitoring alone often fails to detect. This review provides the first integrated assessment linking microalgal biomarker evidence with monsoon-regulated metal dynamics in Indonesian coastal waters. By synthesizing mechanistic, ecological, and environmental data, the study establishes a robust scientific foundation for adopting microalgae as a core component of early-warning systems and coastal biomonitoring frameworks. The findings also highlight methodological gaps and propose future directions to strengthen monitoring programs within a One Health perspective
Co-Authors A.A. Ketut Agung Cahyawan W Adewirli Putra Adewirli Putra Adewirli Putra Adlis Santoni Aghna Kamiko, Awfa Joti Agustiva Agustiva Anthoni Agustien Arnentis Arnentis, Arnentis Aura, Selfi Monica Bustanul Arifin Bustanul Arifin BUSTANUL ARIFIN Buty Kurnia Hamzani Buty Kurnia Hamzani Chairul Chairul Chairul Chessia Nodifa Putri Citra Buhatika Corry Handayani Desy Kurniawati Efrizal Efrizal Efrizal Efrizal Elma Fadrita Rahman Emriadi - Evi Suryawati Fajarandi, Nabiel Hamdhan Fathony Hamzar Suyani Hermansyah Aziz Hilfi Pardi Imelda - Imelda Imelda Kiki Fatmala, Kiki L.N. Firdaus, L.N. Firdaus Lia Anggresani Mai Efdi Mai Efdi Mariani Natalina Matlal Fajri Alif Nabiel Fajarandi Nadia Nadia Nilam Sari Nofrita Nofrita Novesar Jamarun Novesar Jamarun Novsimapera, Gatri Nurmiati Nurmiati Nurmiati Nurmiati Nurmiati, N Olly Norita Tetra Putra, Zaki Aiwa Putri Ramadhani Putri, Anggi Nabila Raesa Pratiwi Putri Rahayu, Aster Rahmiana Zein Raihan Hanif Aulia Rusnam Rusnam Safni Safni Safni Salmariza Sy Sofyan Sofyan Suci Wulandari Suryani, Hamzar Suryati Suryati Suryati Suwirmen, Suwirmen Suwondo Suwondo Syamsuardi Syamsuardi Syukri - Syukri Arief Syukri Arief Syukri Syukri Umiati Loekman Umiati Loekman Umiati Loekman Vanella Indah Pratiwi Wiya E. Fitri Wiya Elsa Fitri Yetria Rilda Yulia - Yulizar Yusuf Yulizar Yusuf Yunita Salamah Zakaria, Indra Junadi Zilfa Zilfa Zuhri Syam Zuhri Syam Zuhri Syam