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All Journal Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Dentika Dental Journal Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Padjadjaran Journal of Dental Researchers and Students MDJ (Makassar Dental Journal) JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) Cakradonya Dental Journal

Harry Agusnar

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Author-ID : 221705

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Dentistry Engineering Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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PEMBUATAN KITOSAN PERAK SEBAGAI ADSORBEN UNTUK MENURUNKAN KADAR LOGAM BESI (Fe) DAN ZINK (Zn) PADA AIR SUNGAI DESA KOPAS KECAMATAN SIMPANG EMPAT KABUPATEN ASAHAN Agusnar, Harry; Chairuddin; Hannani, Nabilah
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 2 (2018): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Penelitian pembuatan kitosan yang dimodifikasi dengan larutan AgNO3 menjadi kitosan perak sebagai adsorben untuk menurunkan kadar logam besi (Fe) dan zink (Zn) pada air sungai desa Kopas kecamatan simpang empat kabupaten asahan telah dilakukan. Pada penelitian ini, didahului dengan pembuatan kitosan perak dengan melarutkan kitosan komersial dan asam asetat 1% serta dicampurkan dengan larutan AgNO3 0,5 M dengan rasio 2:1 lalu diteteskan kedalam larutan NaOH 2 M yang kemudian membentuk gel (bead) berwarna hitam. Kitosan perak yang telah dikeringkan dimasukkan ke dalam kolom, lalu ditambahkan dengan 50 mL sampel yang telah didestruksi dan sudah diketahui kadar logam Fe dan Zn sebesar 1,5175 mg/L dan 0,7218 mg/L. Didiamkan berdasarkan variasi waktu kontak selama 30, 45, dan 60 menit. Penentuan penurunan kadar logam yang telah di adsorbsi oleh kitosan perak dilakukan dengan menggunakan Spektrofotometri Serapan Atom (SSA). Hasil penelitian menunjukkan bahwa pada proses adsorpsi diperoleh persentase penyerapan logam Fe 82,154% dan logam Zn 84,871 % pada waktu kontak optimum penyerapan yaitu 45 menit.

Provision of Oligomer Chitosan from Square Rawan Bonds (Squilla mantis) as Effectanti Microba Agusnar, Harry; Ilyas, Syafruddin
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 1 (2022): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

We report the provision of chitosan oligomers from pen squid as anti-microbial effect. Chitosan oligomer obtained by adding 10 ml HNO2 in chitosan solution and then incubated for one night at room temperature. Depolymerization of chitosan can be determined by looking at a decrease in its viscosity by using viscometer oswald and molecular weight using the equation Kuhn-Mark-Houwink. Antibacterial test was determined by agar diffusion method. The results showed that the viscosity value of the viscosity standard oligomers with the addition of 10 ml of HNO2 decreased by 76,49% and the molecular weight decreased by 80.94%. Antimicrobial Test uses two microbesstaphylococcus aureus and Escherichia coli with variations in the concentration of 0,5%, 1%, 1.5%, 2% and 2,5% chitosan oligomers, anti-microbial test results obtained the largest clear zone on chitosan oligomers with a concentration of 1% is equal to 13,4 in Escherichia coli and 16,2 in staphylococcus aureus.

Comparative Study of The Absorption of Active Zeolite and Ethylenedimintetraacetate (EDTA) Modified Zeolite as Absorbent in a Mixture of Copper (II), Nickel (II), and Zinc (II) Ions Agusnar, Harry
Journal of Chemical Natural Resources Vol. 2 No. 1 (2020): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Research about the absorption of activated zeolite and EDTA-modified zeolite has been successfully conducted to absorb Cu2+, Ni2+, and Zn2+ ions. Natural zeolite used from Sarulla, Pahae Jae, North Sumatera. This research aims to determine the effect of activated zeolite and EDTA-modified zeolite to absorb Cu2+, Ni2+, and Zn2+ ions in the mixture. In this research, natural zeolite was sifted with a 120 mesh sieve, then calcinated at 300ÂºC, and activated with HCl 15%. The natural zeolite was modified with EDTA 0,1 M that was applied as an absorbent on Cu2+, Ni2+, and Zn2+ ions which each of the initial concentrations was 50 mg/L with variations of contact time were 1, 2, and 3 hours and weight of adsorbent were 0,25 g/25 mL, 0,5 g/25 mL, and 1 g/25 mL and also the determination of metal concentration was used ICP-OES method. The results obtained showed that EDTA-modified zeolite and activated zeolite were able to decrease the concentration of metal, but the absorption ability of EDTA-modified zeolite was bigger than activated zeolite. The result of the absorption experiment of Cu2+, Ni2+, and Zn2+ ions showed that the best absorption has been carried out with a contact time was 3 hours and the weight of absorbent was 1 g/25 mL. The percentages of decrease in this research by adding activated zeolite as an absorbent on Cu2+, Ni2+, and Zn2+ ions were 95.99.77.92, and 81,62%, respectively. In addition, the percentages of decreasing by adding EDTA-modified zeolite as an absorbent Cu2+, Ni2+, and Zn2+ ions were 98.79, 96.07, and 97,54%, respectively.

Comparison Study of Fabrication and Characterization of Bead Chitosan Hydrogel and Yarn Chitosan Hydrogel From High Molecular Chitosan Agusnar, Harry
Journal of Chemical Natural Resources Vol. 2 No. 2 (2020): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

The research about comparison study of fabrication and characterization of bead chitosan hydrogel and yarn chitosan hydrogel from high molecular chitosan has been successfully conducted. High molecular chitosan was dissolved into 100 ml of 1, 1.5, and 2% of acetic acid and stirred until the chitosan was dissolved completely. The formed chitosan solution was then taken as much as 6 mL using a syringe and dropped slowly to form small beads into a Petri dish containing NaOH 0.3 M then string into a Petri dish containing acetone 1% and dried at Â±50ÂºC. The bead chitosan hydrogel and yarn chitosan hydrogen results were characterized in which differences of functional groups on chitosan with beads chitosan hydrogel and yarn chitosan hydrogel that occurred in the highest spectra peaks was the band at 3433.29 cm-1, which indicated NH groups on chitosan had changed into an O-H group (3653.18 cm-1) on the bead chitosan hydrogels 1% and yarn chitosan hydrogel 1% which showed the existence of chemical interactions. The yarn chitosan hydrogel has better absorption capability compared to bead chitosan hydrogel. Due to the surface area of the chitosan yarn hydrogel being wider than the beads' chitosan hydrogel.

Analysis of Copper (Cu), Chromium (Cr), and Manganese (Mn) Levels from Liquid Waste of The Steel Industry with Atomic Absorption Spectrophotometry (AAS) Method Aini, Syarifah; Alfian, Zul; Agusnar, Harry
Journal of Chemical Natural Resources Vol. 3 No. 1 (2021): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Liquid waste from the steel industry processing, washing machine, and kitchenware foundry contained the elements of copper (Cu), chromium (Cr), and manganese (Mn). The effluent samples were destructed using concentrated HNO3. Then determined the concentration of the elements copper (Cu), chromium (Cr), and manganese (Mn) using an Atomic Absorption Spectrophotometer with a calibration curve. The results obtained for the level of copper (Cu) on the sample inlet was 0.9714 mg/L to 0.9719 mg/L, and the sample outlet was 3.9990 mg/L to 4.0002 mg/L. Levels of the element chromium (Cr) on sample inlet was 0.0295 mg/L to 0.0297 mg/L, the sample outlet was 0.0399 mg/L to 0.0400 mg/L. Meanwhile, the level of manganese (Mn) in the sample inlet was 0.1269 mg/L to 0.1271 mg/L in a sample outlet was 2.9699 mg/L to 2.9701 mg/L. Then the steel industry wastewater for elemental copper (Cu) and manganese (Mn) exceeded the limits that have been instituted by the Minister of Environment Decree No. 51, 1995, regarding the Liquid Waste Quality Standard for Industrial Activity.

Fabrication and Characterization of Glucosamine Hydrochloride from Chitin of Horseshoe Crab Shell (Tachypleus gigas) Nasution, Aurora Khairani; Agusnar, Harry; Alfian, Zul
Journal of Chemical Natural Resources Vol. 3 No. 2 (2021): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v3i2.9350

Preparation of glucosamine hydrochloride from the chitin of horseshoe crab shells using the chemical hydrolysis method has been done using HCl concentration variation ratios of 7%, 9%, 11%,14 % with a ratio of 9:1 (v/w) for 4 hours at a temperature of 90ÂºC. Determination of glucosamine hydrochloride characteristics was characterized using Fourier transform-infra red (FT-IR) spectroscopy, in which the characteristics of glucosamine hydrochloride obtained in the OH group of glucosamine hydrochloride were 3446 cm-1 (s), 3448 cm-1 (s), 3450 cm-1 (s), 3448 cm-1 (s), respectively. For NH group of glucosamine hydrochloride were 1557 cm-1 (s), 1559 cm-1 (s), 1556 cm-1 (s), 1560 cm-1 (s), respectively. For CN group of glucosamine hydrochloride were 1379 cm-1 (m), 1379 cm-1 (m), 1379 cm-1 (m), 1379 cm-1 (m), respectively. While the glycoside bond of glucosamine hydrochloride 1073 cm-1 (w), 1074 cm-1 (w), 1074 cm-1 (w), 1074 cm-1 (w), respectively. Determination of the concentration of glucosamine hydrochloride with Ultraviolet Spectrophotometer analysis at a maximum wavelength of 197 nm with a standard solution of N-acetyl glucosamine in a solution of phosphate acid 0.005%, in which obtained the concentration of glucosamine hydrochloride 7% = 33.67 ppm, 9% = 36.35 ppm, 11% = 40.16 ppm, 14% = 43.97 ppm.

Analysis of the Copper (Cu), Chromium (Cr), and Manganese (Mn) Levels from the Steel Industry Liquid Waste by Atomic Absorption Spectrophotometry Method Alfian, Zul; Aini, Syarifah; Agusnar, Harry
Journal of Chemical Natural Resources Vol. 4 No. 1 (2022): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v4i1.10502

Liquid waste from the steel industry processing, washing machine, and kitchenware foundry that is disposed containing copper (Cu), chromium (Cr) and manganese (Mn) elements which is harmful to enviromental. The levels of elemental copper (Cu), chromium (Cr), and manganese (Mn) were analyzed using Atomic Absorption Spectrophotometry (AAS) method. The effluent samples were destructed with the addition of concentrated HNO3. Then determining of the concentration of the element copper (Cu), chromium (Cr) and manganese (Mn) using Atomic Absorption Spectrophotometer with a calibration curve. The obtained results for the levels of copper (Cu) on the inlet samples were 0.9714 mg/L - 0.9719 mg/L, the outlet samples were 3.9990 mg/L - 4.0002 mg/L. Hence, the levels of the element chromium (Cr) on inlet samples were 0.0295 mg/L - 0.0297 mg/L, the outlet samples were 0.0399 mg/L - 0.0400 mg/L and the levels of manganese (Mn) in the inlet samples were 0.1269 mg/L - 0.1271 mg/L in a outlet samples were 2.9699 mg/L - 2.9701 mg/L. Then the steel industry wastewater for elemental copper (Cu) and manganese (Mn) has exceeded the limits that have been instituted by the Minister of Environment Decree No. 51, 1995, about the Liquid Waste Quality Standard for Industrial Activity

Co-Authors . Suryati Chairuddin Chairuddin Fitri Yunita Batubara, Fitri Yunita Gita Tarigan Hannani, Nabilah Hannani, Nabilah Ida Ayu Putu Sri Widnyani Kholidina Imanda Harahap Lubis, Ria Ardianti Nasution, Aurora Khairani Pradiva, Muhammad Naufal Rusdy, Hendry Saharman Gea Siahaan, M. Arifin Siti Wahyuni Sumadhi Sastrodihardjo Syafruddin Ilyas Syafruddin Ilyas Syarifah Aini Tamin, Haslinda Z Tarigan, Gita Trimurni Abidin Zul Alfian

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