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Rahmat Eko Sanjaya
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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat, Jl. A. Yani KM 36, Banjarbaru 70714, South Kalimantan, Indonesia
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Jurnal Ilmiah Berkala Sains dan Terapan Kimia
Published by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat
ISSN : 14111616     EISSN : 25498215     DOI : http://dx.doi.org/10.20527
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry
Jurnal Ilmiah Berkala Sains dan Terapan Kimia is a peer-reviewed and open-access scientific journal published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat. The journal publishes high-quality original research articles, review articles, and short communications in chemistry and applied chemical sciences. The journal welcomes manuscripts in the following areas: Organic Chemistry, Inorganic Chemistry, Physical Chemistry, Analytical Chemistry, Biochemistry, Environmental Chemistry, Natural Product Chemistry, Materials and Polymer Chemistry, Computational and Molecular Chemistry, Theoretical Chemistry, and Applied Chemistry. The journal is published biannually in January and July.
Arjuna Subject : Kimia(semua kategori) - Inorganic Chemistry
Articles 256 Documents
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Fluorescent Silica Nanofertilizer for Enhancement of Photosynthesis Rate Fransiskus Hottua Malau; Carlos Rewandesno Sitorus; Winri Imanuela Sihombing; Pebry Asarona Sianipar; Nurul Pratiwi Santoso; Lisnawaty Simatupang
Jurnal Sains dan Terapan Kimia Vol 19, No 2 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i2.19995

Abstract

Penelitian ini bertujuan untuk melakukan sintesis dan karakterisasi nanofertilizer silika fluoresen dengan menggunakan abu vulkanik Gunung Sinabung sebagai sumber silika. Metode sintesis yang dilakukan adalah ekstraksi silika dari abu menggunakan larutan asam pekat, dilanjutkan dengan fungsionalisasi menggunakan trietanolamin (TEA) melalui metode sol-gel. Karakterisasi meliputi analisis morfologi permukaan menggunakan Scanning Electron Microscopy (SEM), identifikasi struktur kristal menggunakan X-ray Diffraction (XRD), identifikasi gugus fungsi menggunakan Fourier Transform Infrared (FTIR), dan pengukuran serapan UV menggunakan UV-Vis Spectroscopy. Hasil penelitian menunjukkan bahwa nanofertilizer silika fluoresen memiliki morfologi permukaan halus, distribusi ukuran partikel seragam (ukuran partikel: 48,49 ± 1,31 nm), struktur amorf dengan peningkatan kristalinitas setelah fungsionalisasi TEA (kristalinitas: 11,88%), dan peningkatan signifikan dalam penyerapan UV (absorbansi: 0,65) dan fluoresensi setelah fungsionalisasi TEA. Kesimpulan dari penelitian ini adalah bahwa pupuk nano silika fluoresensi dapat meningkatkan efisiensi fotosintesis tanaman melalui peningkatan penyerapan cahaya dan sifat fluoresensi. Kata kunci : Abu Sinabung, silika, pupuk nano silika fluoresensi, laju fotosintesis.
A Review: Utilization of Spent Bleaching Earth in Various Industries Dyah Ayu Pramoda Wardani; Windy Sidratul An'nisa
Jurnal Sains dan Terapan Kimia Vol 18, No 2 (2024)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i2.21796

Abstract

ABSTRACT The use of Spent Bleaching Earth (SBE) is very diverse and has potential in various applications. The use of SBE as an adsorbent has been proven to be effective in removing dyes from textile industry wastewater, with significant adsorption capacity at varying pH, adsorbent mass, and stirring time. SBE shows high efficiency in reducing dye concentrations, making it an economical and environmentally friendly choice for industrial wastewater treatment. Modified SBE is more effective than unmodified carbon SBE. In addition to adsorption, SBE can be used as a catalyst in the ozonation process to decompose long-lasting organic compounds, increase reaction rates, and reduce the time required for wastewater treatment. SBE has also been explored as an additional material in making concrete, with the addition of SBE to concrete mixes showing potential in improving the mechanical properties of concrete, such as compressive strength and durability. Keywords: Spent Bleaching Earth; Adsorption, Composite, Utilization ABSTRAK Pemanfaatan Spent Bleaching Earth (SBE) sangat beragam dan potensial dalam berbagai aplikasi. Penggunaan SBE sebagai adsorben telah terbukti efektif dalam menghilangkan zat warna dari air limbah industri tekstil, dengan kapasitas adsorpsi yang signifikan pada variasi pH, massa adsorben, dan waktu pengadukan. SBE menunjukkan efisiensi tinggi dalam pengurangan konsentrasi zat warna, menjadikannya pilihan ekonomis dan ramah lingkungan untuk pengolahan limbah cair industri. SBE yang dimodifikasi lebih efektif dibandingkan karbon SBE tanpa modifikasi. Selain untuk adsorpsi, SBE dapat digunakan sebagai katalis dalam proses ozonisasi untuk menguraikan senyawa organik tahan lama, meningkatkan laju reaksi, dan mengurangi waktu yang diperlukan untuk pengolahan air limbah. SBE juga telah dieksplorasi sebagai bahan tambahan dalam pembuatan beton, dengan penambahan SBE dalam campuran beton menunjukkan potensi dalam meningkatkan sifat mekanis beton, seperti kekuatan tekan dan daya tahan. Kata Kunci: Spent Bleaching Earth; Adsorpsi, Komposit, Pemanfaatan
Photocatalytic Degradation of Phenol Red Using Titanium Dioxide (TiO₂)–Chitosan Composite Catalyst Assisted By Solar Energy Taufiqur Rohman; Muhammad Ridwan Baidhowi; Utami Irawati
Jurnal Sains dan Terapan Kimia Vol 19, No 2 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i2.23475

Abstract

Phenol Red is a very water-soluble textile dye that belongs to the triphenylmethane dye class. In this study, a photocatalyst composite was synthesized by combining TiO2 as photocatalyst with chitosan as a solid support material. The aim of this research is to study what ratio of TiO2: Chitosan would yield the best-performing composites in catalysing the photodegradation of phenol red. This research also studied, the optimum dose of TiO2-chitosan for photodegradation of phenol red, and the effect of solar radiation time towards the photodegradation of phenol red. Into 100 mL of phenol red solution with an initial concentration of 25 ppm, chitosan beads and TiO2-Chitosan composites were added with various doses, i.e:  0.5:100, 1:100, 2:100, and 5:100 gram/mL. The mixtures were put into solar radiaton exposure for 6 hours, where the concentration of phenol red in the solution was analysed every 20 minutes. The highest degradation level of phenol red (72.84%) was achieved by using TiO2-Chitosan 5:10 composites, where the dose added was 5 grams of composite for in 100 mL sample along with a 6-hour of solar radiation exposure.
Photocatalytic Degradation of Naphthol Blue Black Using TiO2-Chitosan Catalyst Under Solar Energy Utami Irawati; Taufiqur Rohman; Khairun Nisa
Jurnal Sains dan Terapan Kimia Vol 18, No 2 (2024)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i2.21809

Abstract

Naphthol blue black (NBB) is an aromatic azo compound that is potentially carcinogenic and mutagenic. An alternative method of dealing with dye waste is photocatalysis. Photocatalysis is a combination of photochemical processes with the use of catalysts. The purpose of this study is to obtain data on the ratio of TiO2: Chitosan, which produces composites with the best ability, irradiation time and optimum dose of TiO2, which is effective in the process of photodegradation of NBB. The process of NBB photodegradation by chitosan beads and composites and chitosan irradiated with the best irradiation time on reducing NBB levels is for 360 minutes with a decrease in concentration of NBB more than 80%. Beads composite TiO2: Chitosan ratio of 5: 10 produces optimal ability. The optimum dose of composite beads in the NBB photodegradation process is 1 g composite / 100 mL solution.
KAJIAN PENGARUH KONSENTRASI KITOSAN PADA SINTESIS KOMPOSIT ARANG-KITOSAN TERIKAT-SILANG EPIKLOROHIDRIN TERHADAP KEMAMPUANNYA DALAM MENGADSORPSI ZAT WARNA NAPHTHOL BLUE BLACK Dahlena Ariyani
Jurnal Sains dan Terapan Kimia Vol 19, No 2 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i2.23423

Abstract

Sintesis komposit arang-kitosan terikat-silang epiklorohidrin (ACCE) sebagai adsorben zat warna naphthol blue black telah dilakukan karena kapasitas adsorpsi dari arang aktif kurang maksimal. Penelitian ini bertujuan untuk mengetahui karakteristik gugus fungsi dan kadar air komposit ACCE, serta mendapatkan data pengaruh konsentrasi kitosan terhadap kemampuan adsorpsinya di dalam komposit ACCE sebagai adsorben zat warna naphthol blue black. Komposit ACCE terdiri dari campuran arang aktif dan larutan kitosan dari berbagai variasi rasio yang diikat silang menggunakan epiklorohidrin kemudian dianalisis pengaruh waktu kontak, pH, dan konsentrasi awal terhadap kemampuan adsorpsi zat warna naphthol blue black. Hasil karakterisasi spektra FTIR pada komposit ACCE menunjukkan bahwa telah terjadi interaksi antara arang aktif dan kitosan terikat-silang epiklorohidrin, hal tersebut dibuktikan dengan bilangan gelombang 2377 cm-1 yang muncul pada spektrum komposit ACCE yang diidentifikasikan sebagai N-H tekuk. Pengaruh waktu kontak dengan variasi menunjukkan bahwa waktu kesetimbangan tercapai pada waktu 30 menit. Pengaruh pH optimum menunjukkan bahwa persentase adsorpsi paling tinggi terjadi pada pH netral yaitu pada komposit AC8CE2 mencapai 10,26 mg/g, hal tersebut dikarenakan adanya pengikat-silang dapat meningkatkan stabilitas kitosan. Pengaruh konsentrasi awal terhadap kemampuan adsorpsi menunjukkan semakin meningkatnya konsentrasi awal, maka akan meningkatkan kemampuan adsorpsi dari zat warna naphthol blue black yaitu pada komposit AC8CE2 mencapai 32,86 mg/g, komposit AC8CE4 mencapai 29,49 mg/g, komposit AC8CE6 mencapai 26,06 mg/g dan komposit AC8CE8 mencapai 28,08 mg/g.
Valorization of Peanut Shell (Arachis hypogeae ) Composited Humic Acid as Bioadsorbent of Heavy Metal Contamination Ninik Triayu Susparini
Jurnal Sains dan Terapan Kimia Vol 19, No 2 (2025)
Publisher : Jurnal Ilmiah Berkala Sains dan Terapan Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i2.22532

Abstract

The problem of organic and industrial waste still be the focus problems in Indonesia, especially in the Cilegon city. In this research, organic waste and peanut shell was valorized into composite bioadsorbent for treated heavy metal contamination. The aim of this research was to create a bioadsorbent composite that is applied to adsorb heavy metals in industrial waste.The compiste bioadsorbent was used as a source of functional groups such as –COOH and -OH phenolics and –OH alcoholates that can be absorb the heavy metals. The adsorption process was carried out by mixing the bioadsorbent with the metal sample saolution for 2h. Characterization was using Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Difraction (XRD), Inductively Coupled Plasma (ICP) and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX). Based on the experimental results, the composite bioadsorbent had macro-sized pores which were efficient in adsorbing Pb, Al, and Fe adsorption efficiencies of 66.50%, 36.16%, and 50.96% respectively. The developed composite bioadsorbent has good application prospects in sustainable environmental processing

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