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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar POSITRON Jurnal Kimia Khatulistiwa Jurnal Sains dan Teknologi Jurnal Riset Kimia Jurnal Kelautan Tropis Jurnal Kimia Riset Indonesian Journal of Chemistry Indonesian Journal of Pure and Applied Chemistry SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan CHEESA: Chemical Engineering Research Articles Indonesian Journal of Chemical Analysis (IJCA) GERVASI: Jurnal Pengabdian kepada Masyarakat JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Riset Sains dan Kimia Terapan Equilibrium Journal of Chemical Engineering Jurnal Teknologi Lingkungan Lahan Basah Jurnal Akademika Kimia Jurnal Akademika Kimia Biodiversitas Journal of Biological Diversity
Adhitiyawarman, Adhitiyawarman
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Tanjungpura. Jl. Prof. Dr. Hadari Nawawi, Pontianak 78115, West Kalimantan, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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EKSTRAKSI HIJAU SENYAWA BIOAKTIF DARI ALGA MERAH (Eucheuma cottoni) MENGGUNAKAN PELARUT EUTEKTIK DAN APLIKASINYA DALAM SEDIAAN LOSION Prayitno, Dwi Imam; Rahmalia, Winda; Adhitiyawarman, Adhitiyawarman; Sayekti, Endah
Indonesian Journal of Pure and Applied Chemistry Vol. 9 No. 1 (2026)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v9i1.101282

Abstract

The need for environmentally responsible extraction techniques has driven the development of green alternatives to conventional organic solvents. Deep eutectic solvents (DESs) offer a sustainable option due to their low toxicity, biodegradability, and simple preparation. In this study, a DES composed of glycine, glycerol, and water (1:11:15 molar ratio) was used as a green extraction medium to isolate bioactive compounds from the red algae (Eucheuma cottonii), providing an eco-friendly solution for efficient marine bioresource utilization. This final product offers a simplified process, as the resulting extract requires no further separation prior to application. The DES exhibited favourable physicochemical properties, including a pH of 5, density of 1300.14 kg/m³, viscosity of 0.0198 Pa·s, and a freezing point below 263.15 K. Phytochemical screening of the DES-based extract confirmed the presence of phenolic and terpenoid compounds. The extract was directly incorporated into sunscreen lotion formulations at concentrations ranging from 0 to 15% (w/w). All formulations showed good homogeneity, with the highest sun protection factor (SPF) value of 8.37 observed in the lotion containing 15% red algae extract. This research shows the success of extracting natural anti-UV ingredients in an environmentally friendly and efficient manner.
Sintesis TiO2-rGO Dengan Pereduksi Alumunium untuk Fotokatalisis Degradasi Metilen Biru dibawah Irradiasi Sinar Tampak Aritonang, Anthoni Batahan; Parwaty, Putry; Wibowo, Muhammad Agus; Ardiningsih, Puji; Adhitiyawarman, Adhitiyawarman
Equilibrium Journal of Chemical Engineering Vol 6, No 2 (2022): Volume 6, No 2 December 2022
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v6i2.65518

Abstract

ABSTRAK. Sintesis TiO2-rGO telah dilakukan dengan prekursor TiO2 dan rGO yang disintesis dari batang grafit menggunakan metode Hidrotermal. Fotokatalis TiO2-rGO hasil sintesis dikarakterisasi menggunakan X-ray diffractometer (XRD), Fourier-transform infrared spectroscopy (FT-IR) dan Diffuse Reflectance UV-VIS (DRUV). Sintesis rGO dengan metode elektrokimia menggunakan agen pereduksi Alumunium. Dilakukan uji aktivitas menggunakan metilen biru dengan bantuan sinar tampak. Berdasarkan data hasil perhitungan diperoleh nilai celah pita TiO2 sebesar 3,33 eV, TiO2-rGO sebesar 3,23 eV yang setara dengan panjang gelombang 378 nm dan 410 nm. Aktivitas fotokatalitik TiO2 dibawah irradiasi sinar tampak mengalami peningkatan setelah dikompositkan dengan rGO membentuk komposit TiO2-rGO mampu mendegradasi MB hingga 67,05%.Kata Kunci: Fotokatalis, rGO, TiO2-rGO, elektrokimia, metilen biru ABSTRACT. TiO2-rGO synthesis was carried out with TiO2 precursor and rGO that was synthesized from a graphite rod using a hydrothermal method. Photocatalysts TiO2-rGO were characterized by X-ray diffractometer (XRD), Fourier- transform infrared spectroscopy (FT-IR), and Diffuse Reflectance UV-VIS (DRUV). Synthesis of rGO by the electrochemical method using reducing agent Aluminum. The activity test was carried out using methylene blue with the help of visible light. Based on the calculated data, the band gap value of TiO2 is 3.30 eV, and TiO2-rGO is 3.00 eV, equivalent to a wavelength of 378 nm and 410 nm. These data indicate that the rGO material reduces the band gap but the low band gap decrease. The photocatalytic activity of TiO2 under visible light irradiation increased after being composited with rGO to form a TiO2-rGO composite capable of degrading MB up to 67.05%Keywords: Photocatalyst, rGO, TiO2-rGO, electrochemistry, methylene Blue
Pembuatan lilin dari minyak jelantah: pelatihan peningkatan keterampilan dan nilai tambah produk rumah tangga bagi ibu rumah tangga di Kecamatan Entikong Kalimantan Barat Risya Sasri; Winda Rahmalia; Lia Destiarti; Adhitiyawarman Adhitiyawarman; Puji Ardiningsih; Afghani Jayuska; Berlian Sitorus; Anthoni B. Aritonang; Firman Shantya Budi; Nurlina Nurlina; Elliska Murni Harfinda; Ferdinand Hidayat
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 10, No 3 (2026): June
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v10i3.38992

Abstract

Abstrak Program Pengabdian kepada Masyarakat ini dilakukan dengan tujuan untuk memberdayakan ibu rumah tangga di Kecamatan Entikong melalui pelatihan keterampilan pengolahan minyak jelantah menjadi lilin. Kegiatan ini menggabungkan aspek edukasi lingkungan, peningkatan keterampilan praktis, serta pembukaan peluang ekonomi skala rumah tangga. Dengan pendekatan partisipatif dan praktik langsung, diharapkan peserta tidak hanya mendapatkan pengetahuan baru, tetapi juga mampu mereplikasi proses pembuatan lilin secara mandiri. Pelaksanaan kegiatan PKM dilakukan dalam beberapa tahap antara lain, persiapan, pelaksanaan dan evaluasi program PKM. Tahap persiapan meliputi orientasi lapangan dalam rangka mengidentifikasi masalah mitra dan kesepakatan teknologi yang akan diimplementasikan, perijinan dan sosialisasi.  Dilanjutkan dengan tahap pelaksanaan yang meliputi Pelatihan Pembuatan Lilin diawali dengan 1).Pengenalan bahan tambahan (asam stearat , pewarna, aromaterapi opsional); 2). Praktik pembuatan lilin dari minyak jelantah; 3). Pencetakan dan pendinginan lilin; 4). Tips keamanan dan penyimpanan. Pada tahap akhir dilakukan evaluasi secara kuantitatif dengan menganalisis kuesioner pengetahuan awal dan kuesioner evaluasi lanjutan. Dibuat bukti tertulis terkait keberhasilan pelaksanaan program. Kegiatan ini merupakan bentuk kontribusi Jurusan Kimia FMIPA Universitas Tanjungpura dalam mendukung pengelolaan limbah yang bertanggung jawab, pemberdayaan perempuan, serta pembangunan berkelanjutan di wilayah perbatasan. Kata kunci: lilin; minyak jelantah; perbatasan; pengabdian; pelatihan. Abstract This Community Service Program aims to empower homemakers in Entikong District through training in processing used cooking oil into candles. This activity combines aspects of environmental education, improving practical skills, and opening up economic opportunities on a household scale. With a participatory approach and direct practice, it is hoped that participants will not only gain new knowledge but also be able to replicate the candle-making process independently. The implementation of the PKM activity is carried out in several stages, including preparation, implementation, and evaluation of the PKM program. The preparation stage includes fieldwork in order to identify partner problems and technological agreements to be implemented, licensing, and socialization, and is continued with the implementation stage, which includes Candle Making Training, starting with 1). Introduction to additional materials (stearin, dyes, optional aromatherapy); 2). Practice making candles from used cooking oil; 3). Molding and cooling candles; 4). Safety and storage tips. In the final stage, a quantitative evaluation is conducted by analyzing the results of the pretest and posttest, as well as the questionnaire responses before and after the activity is implemented. Written evidence is made regarding the success of the program implementation. This activity is a contribution from the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Tanjungpura, in support of responsible waste management, women's empowerment, and sustainable development in border areas. Keywords: candles; used cooking oil; borders; community service; training.
Synthesis of Nd-Pheophytin Complex and Its Hydrolysis into Nd-Pheophorbide from Katuk Leaves (Sauropus androgynous (L.) Merr) Fadia Novayanti; Adhitiyawarman Adhitiyawarman; winda rahmalia
Jurnal Riset Sains dan Kimia Terapan Vol. 11 No. 2 (2025): Jurnal Riset Sains dan Kimia Terapan, Volume 11 Nomor 2, Desember 2025
Publisher : Program Studi Kimia Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JRSKT.112.02

Abstract

Pheophorbide, as a chlorophyll derivative, has potential as a complexing ligand for heavy metals, including lanthanides. The synthesis of Nd-pheophytin complex and its more polar Nd-pheophorbide (pheophytin’s hydrolyzed product) were investigated using pheophytin isolated from Katuk’s (Sauropus androgynus L. Merr.) leaves. This study aims to determine the optimal reaction conditions and the complex characteristics. Pheophytin ligand and Nd were complexed under two different reaction conditions: room temperature and reflux at 65 °C for 10 hours. The pheophytin starting material was obtained by preparative thin-layer chromatography (PTLC), yielding 0.02 g. UV-vis analysis revealed characteristic absorption bands at 404 nm (Soret band) and 666 nm (Q band) in methanol, while FTIR spectra confirmed the presence of functional groups corresponding to pheophytin. The Nd-pheophytin complex formation was indicated by hypsochromic shifts in UV-vis spectra, suggesting the Nd³⁺ complexing. Fluorescence spectra between pheophytin and Nd-pheophytin showed distinct emission patterns, with pheophytin exhibiting peaks at 662 and 722 nm, while Nd-pheophytin displayed peaks with shoulders at 654 and 714 nm. Hydrolysis of Nd-pheophytin using 1 M NaOH at pH 10 produced Nd-pheophorbide. TLC analysis showed a decrease in the Rf value of Nd-pheophytin to Nd-pheophorbide from 0.95 to 0.43, with tailing, attributed to the higher polarity of pheophorbide. These findings confirm the successful synthesis and hydrolysis of the Nd-pheophytin complex.
Synthesis and Characterization of TiO2-Ni/ Coconut Coir Fiber for Photocatalysis of Methylene Blue Degradation Under Visible Light Bella Anggreiny; Adhitiyawarman Adhitiyawarman; Anthoni Aritonang
Jurnal Kimia Riset Vol. 11 No. 1 (2026): June
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkimris.v11i1.89741

Abstract

The Ni²⁺-cation modified TiO₂ photocatalyst has been synthesized using the sol-gel method. Doping with metal ions into the TiO₂ lattice structure was carried out as an effort to reduce the band gap energy and shift the absorption region into the visible light range. The synthesized TiO₂-Ni photocatalyst was subsequently combined with coconut coir fibers as a floating material, commonly referred to as the floating photocatalyst method. This research aims to determine the effect of varying Ni dopant concentrations in TiO₂-Ni/coconut coir fibers on the percentage degradation of methylene blue. Based on XRD characterization, TiO₂-Ni with 1% dopant concentration produced crystals with a size of 8.48 nm and a crystallinity degree of 72.27%. UV-Vis DRS characterization showed that the smallest band gap energy was obtained from the TiO₂-Ni sample with 1% dopant concentration, namely 2.67 eV with an absorption wavelength of 464 nm. FTIR characterization of TiO₂-Ni/coconut coir fiber revealed the appearance of new peaks at wavenumbers 1402 cm⁻¹, 1877 cm⁻¹, and 2814 cm⁻¹, corresponding to –O– groups, ester groups, and –CH₂ groups. Photocatalytic activity tests showed that the higher the Ni dopant concentration, the lower the percentage degradation of methylene blue. The TiO₂-Ni/coconut coir fiber photocatalyst with 1% dopant concentration exhibited the highest degradation efficiency, with a decrease in absorbance of 73.09% after 120 minutes under visible light irradiation.
Adsorption of Free Fatty Acids in Crude Palm Oil (CPO) Using Chicken Egg Shells Marsela Marsela; Adhitiyawarman Adhitiyawarman; Anthoni Batahan Aritonang
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 3 (2025): 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.v10i3.109240

Abstract

Chicken eggshell waste represents an abundant biomineral resource that can be converted into calcium oxide (CaO) to provide a low cost and environmentally friendly adsorbent for crude palm oil (CPO) refining. This study examined the effects of calcination temperature (800 and 850 °C), sodium bicarbonate (NaHCO3) activator concentration (3, 4, and 5%), and adsorbent mass (0.1, 0.5, and 0.9 g) on the adsorption of free fatty acids (FFA) from CPO. Eggshell derived CaO was produced by calcination and chemical activation, and phase formation was verified using X ray diffraction (XRD). Adsorbent quality was screened using iodine adsorption capacity, which peaked at 509.83 mg/g for CaO activated with 4% NaHCO3. XRD patterns showed that calcination at 850 °C yielded more crystalline CaO than calcination at 800 °C, supporting selection of 850 °C for subsequent activation and adsorption tests. Batch adsorption demonstrated that higher adsorbent dosage increased FFA removal, with 0.9 g providing the best performance. Under the optimum condition, FFA decreased from 12.16% to 3.08%, corresponding to 74.70% adsorption efficiency and meeting the Indonesian standard SNI 2901 2021 (maximum FFA 5%). These findings highlight chicken eggshell derived CaO as a promising, waste based substitute for commercial adsorbents in sustainable CPO purification.  
Characteristics of Lactic Acid bacteria isolated from traditional fermented fish RISA NOFIANI; SARWIYATI SARWIYATI; PUJI ARDININGSIH; ADHITIYAWARMAN ADHITIYAWARMAN
Biodiversitas Journal of Biological Diversity Vol. 23 No. 11 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d231116

Abstract

Abstract. Novia R, Ardiningsih P, Adhityawarman, Sarwiyati. 2022. Characteristics of Lactic Acid bacteria isolated from traditional fermented fish. Biodiversitas 23: 5662-5669. Lactic acid bacteria (LAB) are commonly involved in most food fermentation and contribute to the process’s quality and safety. The study investigates the characteristics of LAB isolated from buduk, pekasam, and pekasam ale-ale. Twelve colonies each sample were isolated and identified based on morphology and biochemical test. The pekasam ale-ale isolates were identified as Pediococcus sp. strain A1 and Pediococcus sp. strain A3; Enterococcus sp. strain A2 and Enterococcus sp. strain A4. The LAB in buduk were identified as Streptococcus sp. strain B1, Pediococcus sp. strain B2 and Pediococcus sp. strain B4, Enterococcus sp. strain B3. The pekasam isolates were identified as Pediococcus sp. strain P1, Streptococcus sp. strain P2 and Streptococcus sp. strain P4, Lactobacillus sp. strain P3. The LAB showed antimicrobial activities while Lactobacillus sp. strain P3 and Streptococcus sp. strain P4 could grow at pH 1. Two LAB including Enterococcus sp. strain A2 and Pediococcus sp. strain P1 showed amylase activity while Pediococcus sp. strain A3, Streptococcus sp. strain B1, Pediococcus sp. strain B2, Enterococcus sp. strain B3 showed protease activity. All LAB produced organic acids with varying concentrations at different incubation times. Furthermore, those isolated from various fish fermentations showed different genera and characteristics. Lactobacillus sp. strain P3 was the best to initiate food fermentation and a probiotic candidate based on their characteristics.
Co-Authors Adhitya Adhitya Afghani Jayuska Afghani Jayuska Ajuk Sapar Akbar, Aji Ali Anthoni Aritonang Anthoni B. Aritonang Anthoni B. Aritonang Anthoni Batahan Aritonang Antonius Antonius Antonius Aritonang, Anthoni Batahan Asmadi asmadi Bartholomeus Lavelim Bella Anggreiny Berlian Sitorus Destiarti, Lia Elliska Murni Harfinda Elyta Clarissa Emilia Emilia Endah Sayekti Evi Gusmayanti Fadia Novayanti Ferdinand Hidayat Firman Shantya Budi Gusrizal Gusrizal Hanopa Selpiana Harlia Harlia Imelda Hotmarisi Silalahi Intan Syahbanu Kuswariyah, Ratmi Lia Destiarti Lubis, Yosef Novem Batistuta M. Agus Wibowo Margareta Caroline Harunrasjid Marsela Marsela Muhamad Agus Wibowo Muhammad Agus Wibowo Novianti, Icha Nurlina, Nurlina Parwaty, Putry Prayitno, Dwi Imam PUJI ARDININGSIH Puji Ardiningsih Puji Ardiningsih Puji Ardiningsih Puji Ardiningsih RISA NOFIANI Risya Sasri Rizky Fitri Febrianti Rossie Wiedya Nusantara RR. Ella Evrita Hestiandari Saraswati, Endah Sari, Heni Puspita SARWIYATI SARWIYATI Septiani Septiriyani, Melia Siswahyudianto Sri Milawati Syahbanu, Intan Titin Anita Zahara Uswatun Hasanah Veren Fransiska Warsidah warsidah Wibowo, Muhammad Agus Winda Rahmalia Winda Rahmalia Winda Rahmalia Winda Rahmalia Zaharah, Titin Anita