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All Journal FITOFARMAKA: Jurnal Ilmiah Farmasi Molekul: Jurnal Ilmiah Kimia Jurnal Ilmiah Kanderang Tingang Jurnal Ilmiah Berkala: Sains dan Terapan Kimia

Karelius Karelius

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Author-ID : 3478592

Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Medicine & Pharmacology

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AKTIVITAS ANTIBAKTERI DESINFEKTAN BERBAHAN DASAR ASAP CAIR CANGKANG KELAPA SAWIT TERHADAP BAKTERI STAPHYLOCOCCUS AUREUS Lilis Rosmainar; Karelius Karelius; Angeline Novia Toemon
FITOFARMAKA: Jurnal Ilmiah Farmasi Vol 11, No 2 (2021): FITOFARMAKA | Jurnal Ilmiah Farmasi
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jf.v11i2.3078

Cangkang kelapa sawit merupakan limbah pengolahan kelapa sawit yang dapat digunakan untuk menghasilkan asap cair. Asap cair dapat digunakan sebagai pengawet, antibakteri terutama mengandung asam asetat dan fenol. Tujuan dari penelitian ini adalah menguji efektivitas antibakteri desinfektan berbahan dasar asap cair pada berbagai konsentrasiterhadap pertumbuhan bakteri Staphylococcus aureus. Pembuatan asap cair dilakukan melalui proses torefaksi dengan pemberian gas nitrogen sehingga menghasilkan asap cair dari cangkang kelapa sawit yang berwarna kehitaman yang mengandung senyawa fenol, asam propanoat, 2-propanon, 1,2-benzendiol, 2-furankarbokaldehid, dan asam asetat. Asap cair hasil torefaksi kemudian didestilasi sehingga menghasilkan warna coklat yang kemudian dianalisis menggunakan GC-MS dengan kandungan senyawa fenol, asam propanoat, 2 propana, dan asam asetat. Desinfektan berbahan dasar asap cair dibuat dengan berbagai konsentrasi yaitu 12,5%, 25%, dan 50% diuji terhadap bakteri S.aureus. Pada uji antibakteri desinfektan berbahan asap cair dengan berbagai konsentrasi tidak ditemukan adanya pertumbuhan bakteri S.aureus.Hal ini menunjukkan bahwa desinfektan berbahan dasar asap cair efektif dalam menghambat bakteri S.aureus.

Fabrication and Performance of Laterite East Kotawaringin-Zeolite/Chitosan Composite as Slow Release of Iron Fertilizer Rendy Muhamad Iqbal; Sri Wardhani; Darjito Darjito; Karelius Karelius
Molekul Vol 13, No 2 (2018)
Publisher : Universitas Jenderal Soedirman

Laterite soil is one of natural resources in East Kotawaringin regency, Central Kalimantan, Indonesia, which contains high element of Fe. Fe is one of micronutrients that is needed for plant in slight amount. This study aims to determine the effect of chitosan composition and composition of zeolite : laterite on the release of Fe activities from synthesized fertilizers result. Laterite is characterized by using XRF and XRD. Slow release iron fertilizer is synthesized by eliciting laterite to zeolite matrix. Then, It is stirred into chitosan gel with concentration of 2, 2.6, and 2.8 % for 30 minutes. After Zeolite - laterite - chitosan has been homogenized, then it is dropped into 0.4 M NaOH to form beads. Then testing the release of Fe with the batch method in distilled water. The result showed that the laterite soil is amorphous form, and Fe content reached 80.25 % . The higher the concentration of chitosan which is used , then more Fe is released from fertilizer. Whereas if the amount of zeolite is greater, the slower the release of Fe will be.

Studies on Synthesis, Characterization, and Adsorption of Cationic Dyes from Aqueous Solutions Using Magnetic Composite Material from Natural Clay in Central Kalimantan, Indonesia I Made Sadiana; Karelius Karelius; Retno Agnestisia; Abdul Hadjranul Fatah
Molekul Vol 13, No 1 (2018)
Publisher : Universitas Jenderal Soedirman

Clay is a natural material from crystalline silicate with layered structures, has high cation exchange capacity, and large surface area. These advantages can be used as an adsorbent for the removal of contaminants in aqueous solutions, such as heavy metals and dyes. In Indonesia, clays from Java, Sulawesi, and Sumatra islands have been used as adsorbent, furniture, and construction materials. Due to limited information about basic characteristics of clay from Kalimantan, this clay has not been utilized well. Therefore, natural clay from Kalimantan, especially in Central Kalimantan, was used as adsorbent of cationic dyes in this present study. However, the clay has difficulty for separating the solid phase from aqueous solution after adsorption process. To solve this problem, combining clay with magnetic material was opted. The objectives of this study are to synthesize the magnetic composite material from natural clay by coprecipitation method and to characterize the synthesized magnetic composite material using an x-ray diffraction method, transmission electron microscopy, and vibrating sample magnetometer. The adsorption properties of the synthesized magnetic composite material were evaluated using rhodamine B and methylene blue dyes in aqueous solution. Before magnetic composite material was synthesized, the clay was previously being activated for removing impurities. The magnetic material formed in the structure of clay had magnetite with particle size of 2.75 nm and the magnetization value of 24.91emu/g. The adsorption capacities of natural clay, activated clay, and magnetic composite of clay in rhodamine B were 34.29, 76.27, and 81.46 mg/g, respectively, while in methylene blue were 30.25, 83.92, and 133.90 mg/g, respectively. These results suggested that magnetic composite of clay can increase the adsorption capacities against dyes and accelerate the separation of the adsorbent solid phase from aqueous solution with largest adsorption capacity on methylene blue dye.

Sintesis Dan Karakterisasi Komposit Magnetik Lempung Putih Asal Kalimantan Tengah Sebagai Adsorben Zat Warna Pada Limbah Cair Karelius Karelius; Nopriawan Berkat Asi
Jurnal Ilmiah Kanderang Tingang Vol 9 No 1 (2018): Jurnal Ilmiah Kanderang Tingang
Publisher : FKIP Universitas Palangka Raya

Sintesis, karakterisasi dan uji adsorpsi komposit magnetik lempung putih asal Kalimantan Tengah terhadap warna zat warna pada limbah cair telah dilakukan. Sintesis komposit magnetik lempung putih dilakukan dengan metode kopresipitasi. Karakterisasi komposit magnetik lempung putih dilakukan dengan spektroskopi FTIR (Fourier Transform Infrared), XRD (X-ray diffraction) dan VSM (Vibrating sample magnetometer). Uji adsorpsi dilakukan menggunakan sistem batch dengan kajian adsorpsi yang dipelajari meliputi pH optimum, kinetika adsorpsi dan kesetimbangan adsorpsi. Hasil penelitian menunjukkan bahwa metode kopresipitasi telah berhasil mengkompositkan oksida besi fasa magnetit pada lempung putih asal Kalimantan Tengah dengan nilai magnetisasi sebesar 21,38 emu/g. Lempung putih, lempung putih teraktivasi dan komposit magnetik lempung putih mampu mengadsorpsi Zat warna pada limbah cair dari dalam larutan dengan adsorpsi maksimal secara berturut-turut terjadi pada pH 3, 3 dan 2. Kajian kinetika dan kesetimbangan adsorpsi menunjukkan bahwa adsorpsi Zat warna pada limbah cair oleh ketiga jenis adsorben mengikuti kinetika orde dua semu dengan pola isoterm Langmuir. Komposit magnetik lempung putih asal Kalimantan Tengah mampu meningkatkan kapasitas adsorpsi Zat warna pada limbah cair sampai dengan 2 kali lipatnya dan dapat mempercepat proses pemisahan partikel adsorben dari dalam larutan menggunakan medan magnet eksternal.

SINTESIS FERRAT (FeO42-) DARI Fe(NO3)2 DAN NaOCl SEBAGAI PENDEGRADASI METHYLENE BLUE Karelius Karelius; Nopriawan Berkat Asi
Jurnal Sains dan Terapan Kimia Vol 10, No 1 (2016)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Sintesis ferrat sebagai pendegradasi methylene blue telah dilakukan. Sintesis dilakukan dengan mereaksikan larutan Fe(NO3)3 dan NaOCl sebagai oksidator pada kondisi alkalis. Reaksi yang terjadi antara ferrrat dan methylene blue dimonitor menggunakan spektrofotometer UV-Vis. Pengaruh beberapa parameter seperti pH dan rasio molar dari ferrat dan methylen blue juga dipelajari pada penelitian ini. Hasil penelitian menunjukkan bahwa ferrat dapat mendegradasi methylen blue secara efektif pada pH 9,6, dengan persentase degrdasi terbesar terdapat pada rasio molar ferrat dan methylene blue 3 : 1 yaitu 87,8%. Hal ini menunjukan bahwa ferrat merupakan bahan alternatif dan ramah lingkungan yang dapat digunakan untuk mendegradasi zat pewarna azo.Kata Kunci: Ferrat, methylene blue

Utilization of Ferrate Ion (FeO42-) as Oxidizing Agent for Reducing Color Intensity of Peat Water Retno Agnestisia; Karelius Karelius; Rendy Muhamad Iqbal; Dyah Ayu Pramoda Wardani; Midun Efendi Patar Sihombing; Sri Yulandari Simangunsong; Junita Dongoran
Jurnal Sains dan Terapan Kimia Vol 17, No 2 (2023)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v17i2.14832

Peat water from Central Kalimantan is generally yellow to brownish-red in color. It causes peat water to not be used as a source of water for daily needs. Humic acid, fulvic acid, and humin are organic compounds that cause peat water to become colored. One alternative step that can be taken for reducing the color intensity of peat water is to degrade color-causing organic compounds by using an oxidizing agent. A hexavalent form of iron ion (Fe6+), commonly called ferrate (FeO42-) in potassium ferrate compound, is a powerful oxidizing agent used in the present study. Potassium ferrate (K2FeO4) was synthesized by a wet oxidation method and characterized using a UV-Vis spectrophotometer and an X-Ray Diffractometer (XRD). The ferrate solution is purplish-red in color with a maximum wavelength of 510 nm. The XRD pattern shows strong diffraction peaks at 2θ which are characteristic of K2FeO4. The ferrate solution was then used to degrade color-causing organic compounds in the peat water from Central Kalimantan. Determination of the optimum degradation conditions was monitored by the absorbance decrease of organic compounds in peat water at a wavelength of 370 nm. The results showed that ferrate solution with a concentration of 80 ppm was able to degrade organic compounds in peat water at pH 8, with a removal efficiency of 100%. Keywords: oxidizing agent, ferrate ion (FeO42-), peat water

Co-Authors Abdul Hadjranul Fatah Angeline Novia Toemon Darjito Darjito Dyah Ayu Pramoda Wardani I Made Sadiana Junita Dongoran Lilis Rosmainar Midun Efendi Patar Sihombing Nopriawan Berkat Asi Rendy Muhamad Iqbal Rendy Muhamad Iqbal Retno Agnestisia Sri Wardhani Sri Yulandari Simangunsong

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