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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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Deep Eutectic Solvent (DES) Based on Choline Chloride and Mono-, Di-, Poly-Ethylene Glycol as KI/I2 Electrolyte Solvents on DSSC Devices Adhitya Adhitya; Winda Rahmalia; Intan Syahbanu; Gusrizal Gusrizal; Adhitiyawarman Adhitiyawarman
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.82754

Abstract

Deep eutectic solvent (DES) has high viscosity and electrical conductivity values, so it can be used as an electrolyte solvent in dye-sensitized solar cells (DSSCs). This research was conducted to produce DES based on choline chloride (ChCl) and ethylene glycol (EG), diethylene glycol, and polyethylene glycol-400, which were then used as KI/I2 couple redox electrolyte solvent to improve the DSSC performance. The synthesis was carried out by mixing each component in several variations of the mole fraction of ChCl (xCHCl) at 80 °C for 15 min, and then was characterized by their pH, freezing point, density, viscosity, and electrical conductivity. A mixture that meets the criteria as a eutectic solvent and has a freezing point of less than −18 °C with the highest electrical conductivity value is DES ChCl:EG with xChCl 0.3 and xChCl 0.4. Both DESs were then used as a solvent for KI/I2, combined with acetonitrile in various compositions. The electrolyte with the highest electrical conductivity value was KI/I2 dissolved in ChCl:EG with xChCl 0.3 solvent 6:4 v/v, and then employed in DSSC device. The best performance of DSSC (Isc= 0.155 mA/cm2; Voc=0.465 V; Pmax= 0.719 W; ηmax= 0.072%) was produced under a light intensity of 0.1 W/cm2.
Banana Peel Adsorbent to Reduce the Concentration of Lead and Cadmium Metal Pollution in Landfill Leachate Sri Milawati; Adhitiyawarman Adhitiyawarman; Rossie Wiedya Nusantara
Jurnal Kimia Sains dan Aplikasi Vol 27, No 3 (2024): Volume 27 Issue 3 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.3.110-120

Abstract

Banana peels can be a valuable adsorbent for reducing heavy metals in water. This study investigated the effect of chemical activators on Nipah banana peel (Musa acuminata balbisiana) on their ability to reduce Pb and Cd metals in landfill leachate. Before the adsorption test, the banana peels were treated with a different chemical activator, including detergent, NaOH, KOH, and H3PO4. The results showed that H3PO4 adsorbs relatively high amounts of metals (Pb-75.800%, Cd-18.491%) in landfill leachate among these activators. FTIR analysis showed that banana peels treated with H3PO4 produced sharper carbonyl or carboxyl group peaks. These groups are very influential in the metal adsorption process. SEM-EDS analysis of the H3PO4-treated banana peels showed an increase in carbon and oxygen elements in the banana peels and changes in the pore surface that enhanced the adsorption process on Pb and Cd metals. From this study, banana peels activated with H3PO4 showed great potential to be developed into adsorbents to reduce heavy metal concentration.
Synthesis and Characterisation of B-CDs/TiO2 Composite Anthoni B. Aritonang; Ajuk Sapar; Uswatun Hasanah; Adhitiyawarman Adhitiyawarman; Puji Ardiningsih
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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

Abstract

Synthesis of composite boron-doped carbon nanodots (B-CDs)/TiO2 using the sol-gel method performed with titanium tetraisopropoxide (TTIP) precursor and B-CDs prepared by the microwave method using citric acid monohydrate, urea, and boric acid as precursors. The optimum concentration of boron dopant (B) on B-CDs/TiO2 is 0.5% boron (w/w) which is then used as a composite on TiO2 resulting in a brown solid and has blue luminescent under UV light. The result with UV-Vis/DRS for variation in B-CDs concentration of 0.5%, 1.25%, and 2.5% showed Eg values of 2.34 eV, 2.00 eV, and 2.29 eV. B-CDs cause the maximum emission peak (λEm) to redshift and affect the intensity of photoluminescence TiO2. The characterization of FT-IR does not indicate a new peak, there is no bonding in the B-CDs/TiO2 composite. The TiO2 diffractogram was observed to shift towards a larger 2θ which caused the crystallinity of TiO2 to decrease. Based on the photocatalytic activity test on the degradation of methylene blue solution, it showed fairly good activity. It is expected that the B-CDs/TiO2 composite has the potential to be applied as a photocatalyst to degrade organic pollutants under visible light illumination.
The Effect of Taro Tuber Starch (Colocasia esculenta (L.) schott) Addition to Characteristic of Biodegradable Plastic with PVA Polymer and Calcium Carbonate (CaCO3) Filler Saraswati, Endah; Syahbanu, Intan; Adhitiyawarman, Adhitiyawarman
Jurnal ILMU DASAR Vol 24 No 1 (2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v24i1.33409

Abstract

The preparation of biodegradable plastics based on polyvinyl alcohol (PVA)-taro starch as an alternative to synthetic plastics has been conducted. The aim of this research was to identify the effect of taro starch composition on the production of biodegradable plastic and their characteristics in an aquatic environment. The solution casting method was used to produce biodegradable plastic. PVA was dissolved in hot distilled water, and taro starch (0; 0.5; 1.5; 2.5; and 3.5 g) was dissolved in another chamber filled with distilled water, glycerol and citric acid. Both solutions were mixed together and CaCO3 was then added. The mixture was casted on acrylic plates while biodegradable plastic without starch was used as a control. Characteristic of Biodegradable plastic and it’s properties were examined by Fourier Transform Infra Red (FTIR), water uptake, and moisture absorption test. While the biodegrability of the sample were tested in river water media in the laboratory. The results showed that the wave number at 1698-1712 cm-1, indicating that the cross-linking between PVA and the starch occured. Water uptake and moisture absorption tests showed that all of the biodegradable plastic varieties produced were hydrophilic. The biodegradation test showed that the largest degree of decomposition was reached by the PVA-starch 3.5 g variety which was 80.33%. Thus, the more starch on biodegradable plastic, the more biodegradation achieved.
Microcellulose from Betel Husk Fiber as Filler in Bioplastic Kuswariyah, Ratmi; Sitorus, Berlian; Adhitiyawarman, Adhitiyawarman; Antonius, Antonius
Jurnal ILMU DASAR Vol 24 No 1 (2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v24i1.34023

Abstract

Betel nut husk fiber has a reasonably high cellulose content. Meanwhile, bioplastics nowadays are mostly made of Poly Vinyl Alcohol (PVA), with one of its limitations being tensile strength and other properties regarding mechanical. Thus, this study aims to isolate microcellulose from areca nut fiber and use the fiber as a filler in bioplastic, where cellulose is combined with PVA. The intention is to understand the effect of adding microcellulose from betel nut fibers on the properties, including the biodegradability of PVA-based bioplastic films. This research has three steps: isolating cellulose from betel nut peel fibers by delignification, pulping, and bleaching. The next step is hydrolysis to obtain microcellulose. The last is the preparation of bioplastic films using the solution casting method, with five different ratios of microcellulose content in the bioplastic. The cellulose characterization from FTIR spectra shows the absorption of several peaks, such as O-H, C-H, and C-O functional groups. The mechanical testing results on the variation of bioplastic show that the bioplastic with the best characteristics was PL5, which has the highest microcellulose content, 8 MPa and 10.2% for tensile strength and elongation, respectively. The biodegradation test for bioplastic variation (PL5) was 82% within eight weeks, while in Indonesian National Standard (SNI) number 7188.7:2016, it is 100% within 60 days.
Synthesis and Characterization of SCDs/TiO2 Composite Aritonang, Anthoni Batahan; Sapar, Ajuk; Sari, Heni Puspita; Ardiningsih, Puji; Adhitiyawarman, Adhitiyawarman
CHEESA: Chemical Engineering Research Articles Vol. 5 No. 2 (2022)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v5i2.13915.92-100

Abstract

Synthesis of sulphur-doped carbon nanodots immobilized on the TiO2 surface (SCDs/TiO2) composite was carried out using the sol-gel method with SCDs and titanium tetraisopropoxide (TTIP) as precursors. SCDs were prepared from citric acid monohydrate, urea, and sodium disulphite using the microwave technique. SCDs/TiO2 was then visually observed under UV 365 nm and characterized by UV-Vis diffuse reflectance spectrophotometry (UV-Vis/DRS), Photoluminescence (PL) spectroscopy, Fourier transform infrared (FT-IR), and X-ray diffraction (XRD). The SCDs/TiO2 composite product had a brown solid with a green luminescent under UV light. Furthermore, UV-Vis/DRS for variations in SCDs concentrations of 0.5%; 1.25%, and 2.5% showed Eg values of 2.33 eV, 2.14 eV, and 1.61 eV, respectively. The results showed that SCDs caused the maximum emission peak (λEm) to redshift and also affected the intensity of PL TiO2. There was also a shift in the absorption peak towards the visible light region. Based on the results, the 0.5% SCDs/TiO2 was the optimum concentration with the lowest intensity as an indication of separation of the (e-) and (h+) charge pairs, which greatly enhanced the photocatalytic efficiency.
Aktivitas Antioksidan Ekstrak Astaxanthin dari Limbah Kulit dan Kepala Udang Dogol (Metapenaeus ensis) Rahmalia, Winda; Adhitiyawarman, Adhitiyawarman; Prayitno, Dwi Imam; Lubis, Yosef Novem Batistuta
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.22706

Abstract

Astaxanthin is a carotenoid derivative compound with various benefits, one of which is as an antioxidant, making astaxanthin applicable in drugs and cosmetics. Astaxanthin is discoverable in various sources, with shrimp as its main source. This study aims to determine the antioxidant activity of astaxanthin extracted from shrimp shell and head wastes. Extraction was carried out using the soxhletation method, followed by saponification to obtain free astaxanthin. Astaxanthin in extract before and after saponification were identified using thin-layer chromatography (TLC) and UV-Vis spectrophotometry. Antioxidant activity assay was carried out in five variations of sample concentrations using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. Extraction of shrimp shell and head wastes resulted in an oil yield percentage of 1.02 and 3.05 % of dry mass in 60 g of shrimp shells, respectively. Identification results showed astaxanthin content in extracts after saponification were higher than that before saponification. There are three thin layer chromatography (TLC) separation spots and two UV-Vis absorption peaks in extracts before and after saponification. Antioxidant activity assay results (IC50) of shrimp shell extract before and after saponification showed antioxidant activity of 572.0 and 186.6 mg/L, respectively. Astaxanthin merupakan senyawa turunan karotenoid dengan beragam manfaat, salah satunya sebagai antioksidan, sehingga membuat astaxanthin dapat diaplikasikan dalam obat-obatan dan kosmetik. Astaxanthin dapat ditemukan dalam berbagai sumber, dengan sumber utama adalah udang. Penelitian ini bertujuan untuk menentukan aktivitas antioksidan astaxanthin yang diekstraksi dari limbah kulit dan kepala udang. Ekstraksi dilakukan dengan metode soxhletasi, dilanjutkan dengan saponifikasi untuk mendapatkan astaxanthin bebas. Hasil ekstraksi dan saponifikasi diidentifikasi astaxanthinnya menggunakan kromatografi lapis tipis (KLT) dan spektrofotometri UV-Vis. Uji aktivitas antioksidan dilakukan pada lima variasi konsentrasi sampel menggunakan metode 2,2-difenil-1-pikrilhidrazil (DPPH). Ekstraksi limbah kulit dan kepala udang menghasilkan rendemen masing-masing sebesar 3,05 dan 1,02% massa kering dari 60 g kulit udang. Hasil identifikasi menunjukkan kadar astaxanthin dari ekstrak setelah saponifikasi lebih tinggi daripada sebelum saponifikasi. Terdapat tiga spot pemisahan kromatografi lapis tipis (KLT) serta dua puncak serapan UV-Vis pada ekstrak sebelum dan setelah saponifikasi. Hasil uji aktivitas antioksidan (IC50) kulit udang sebelum dan setelah saponifikasi masing-masing adalah 572,000 dan 186,583 mg/L.
PEMURNIAN HEMATIT DARI RED MUD PT INDONESIA CHEMICAL ALUMINA (ICA) DENGAN VARIASI SUHU KALSINASI Adhitiyawarman, Adhitiyawarman; Septiriyani, Melia; Zaharah, Titin Anita
Indonesian Journal of Pure and Applied Chemistry Vol 7, No 3 (2024)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v7i3.70617

Abstract

Red mud is an insoluble fraction of bauxite ore, and it is a waste from bauxite processing into alumina. Red mud contaminated with alkaline substances and therefore poses a danger to the environment and humans. One of the largest bauxite processing companies in West Kalimantan is PT Indonesia Chemical Alumina (ICA). PT ICA can produce red mud around 240.000-450.000 each year. Red mud contains some minerals that are useful for various industries. The largest mineral content in red mud is hematite. Hematite is an iron oxide mineral with the chemical formula Fe2O3. This study aims to determine the hematite content of the extraction results from Red mud PT ICA. This research also investigates how different calcination temperatures during synthesis impact material properties, with analysis using XRF and XRD. It is known that the extracted sample contains 49.74% Fe2O3. The results of XRF analysis show that at 900 °C, the hematite content produced is higher (90.20%) compared to 800 °C (87.84%). The results of XRD analysis show that the position of the typical 2θ peaks of hematite that appear in both temperature variations is not too different, namely: 33.04 °; 35.515; 54.01 ° at 800 °C and 33,06 °; 35,55 °; 54,04 ° at 900 °C. The calcination temperature variation is also known to affect the percentage of hematite crystallinity, which is 18.23% at 800 °C and 24.87% at 900 °C. The crystal structure of hematite is rhombohedral.
Identifikasi Timbulan Sampah Domestik Pada Kawasan Permukiman Pesisir Di Desa Pangkalan Buton Asmadi, Asmadi; Akbar, Aji Ali; Sudrajat, Jajat; Gusmayanti, Evi; Adhitiyawarman, Adhitiyawarman
Jurnal Teknologi Lingkungan Lahan Basah Vol 13, No 2 (2025): July 2025
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v13i2.94098

Abstract

Waste management in Pangkalan Buton Village is a crucial issue in sustainable development, especially in vulnerable coastal areas. This research examines the current condition of waste management facilities, the level of compliance with environmental regulations, and public participation. Findings show that daily waste generation reaches 0.4 kg per person, mostly consisting of biodegradable organic waste. However, the lack of recycling and composting infrastructure hinders proper processing. Waste collection services are inconsistent, and public awareness remains low. The study recommends enhancing community education through continuous outreach programs and strengthening the role of the DPRKPLH. Developing modern waste management infrastructure, implementing data-based monitoring and evaluation systems, and enforcing environmental laws are also essential. Collaboration between local government, private sectors, and communities should be improved, especially through CSR initiatives and the use of digital tools like reporting apps. Effective waste management not only preserves the environment but also creates economic opportunities through recycling and compost production. Ultimately, a holistic and integrated approach involving education, infrastructure, law enforcement, and technological innovation is necessary to achieve efficient, sustainable, and community-supported waste management in Pangkalan Buton Village.
Peningkatan Biodegradabilitas dan Penyerapan Air Akibat Penambahan Mikroselulosa Hasil Isolasi Tandan Kosong Kelapa Sawit dalam Bioplastik Sitorus, Berlian; Novianti, Icha; Adhitiyawarman; Antonius
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 2 (2023): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i2.52469

Abstract

Bioplastik adalah jenis bahan yang cakupannya luas, meliputi plastik berbasis bio (bio-based) tetapi tidak harus biodegradabel ataupun plastik berbahan dasar petrokimia dan bio yang dianggap bersifat biodegradable. Penggunaan bioplastik diharapkan dapat mengurangi pencemaran lingkungan yang diakibatkan sampah plastik konvensional. Namun seringkali sifat fisik dari bioplastik belum sesuai dengan yang diinginkan, sehingga perlu ditingkatkan, misalnya dalam hal kekuatan mekanik. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan mikroselulosa hasil isolasi dari tandan kosong kelapa sawit terhadap sifat bioplastik komposit dari PVA-selulosa-asam sitrat-pati-gliserol. Adapun tahapan metode yang dilakukan: preparasi serat, delignifikasi, hidrolisis asam, pembuatan film tipis bioplastik, serta karakterisasi mikroselulosa dan plastik yang dihasilkan. Mikroselulosa hasil isolasi memiliki derajat kristalinitas 39% dan diameter serat ± 8,5 μm. Bioplastik dengan lima variasi penambahan massa mikroselulosa: masing-masing diuji kekuatan mekanik, biodegradabilitas dengan metode soil burial test, dan penyerapan air. Hasil pengujian menunjukkan pengaruh penambahan mikroselulosa terhadap bioplastik, yaitu dalam hal peningkatan kekuatan tarik dari bioplastik menjadi 7 - 8 MPa dan persen elongasi 10-16%. Biodegradabilitas dan penyerapan air dari bioplastik semakin tinggi seiring dengan penambahan jumlah mikroselulosa dalam bioplastik.
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