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All Journal VALENSI Natural Science: Journal of Science and Technology Jurnal Spektran The Journal of Pure and Applied Chemistry Research MPI (Media Pharmaceutica Indonesiana) KOVALEN: Jurnal Riset Kimia Jurnal Kimia Mulawarman Indonesian Journal of Chemistry Jurnal Ilmiah Teknik Kimia Sewagati
Ni Ketut Sumarni
Department Of Chemistry, Tadulako University, Jl. Sukarno-Hatta Km 9, Palu 94148, Central Sulawesi, Indonesia
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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Isotermal Adsorpsi Ion Tembaga (II) Menggunakan Arang Tongkol Jagung (Zea mays L.) Teraktivasi Kalium Permanganat: Isothermal Adsorption of Copper (II) Ions Using Charcoal from Corn Cobs (Zea mays L.) Activated by Potassium Permanganate Lisma Habiba; Nov Irmawati Inda; Prismawiryanti; Husain Sosidi; Ni Ketut Sumarni; Dwi Juli Puspitasari; Moh. Mirzan; Jusman
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 1 (2023): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i1.16292

Abstract

Corn cobs which generally only become waste can be processed into activated carbon and used for the absorption of heavy metals, such as copper(II) ions. This study aims to determine the morphology of corn cobs charcoal after activation, determine the isothermal adsorption model of copper (II) metal ions on corncob-activated carbon, and then determine the adsorption capacity of copper (II) metal ions on corncob-activated carbon. The morphology of the corncob-activated charcoal obtained was analyzed using Scanning Electron Microscopy (SEM). Isothermal adsorption of copper (II) ions was carried out with various concentrations of copper (II) ions of 5, 10, 20, 50, and 100 ppm. The results of the analysis using SEM showed that the surface shape of the corncob-activated charcoal is regular and has pores with a pore diameter obtained in the range between 1.08-1.26 m and 1.38-1.59 m. The mechanism of adsorption of copper (II) ions by corncob-activated charcoal using KMnO4, following the Freundlich isothermal model with a value of R2 0.9993 with an adsorption capacity of 51 x 10-4 mmol/L. The utilization of activated carbon from corn cobs that are activated by potassium permanganate is very effective for adsorbing copper metal ion pollutants through an adsorption mechanism on the surface of activated carbon.
Analisis Nutrisi Sereal dari Ampas Kelapa dan Ampas Susu Kedelai: Nutritional Analysis of Cereals from Coconut Pulp and Soy Milk Pulp Nurfita Sari; Ni Ketut Sumarni; Syaiful Bahri; Nurhaeni; Aini Auliana Amar; Syamsuddin; Jusman
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 2 (2023): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i2.16437

Abstract

Coconut pulp and soy milk pulp flour can be combined to reduce the use of wheat flour in the manufacture of cereals. The high fiber and protein content of coconut and soy milk pulp will improve the quality of cereals. The aim of this study was to obtain the mass ratio of coconut and soy milk pulp flour which produces cereals with high nutritional value. The ratio of coconut and soy milk pulp flour used was 0:100; 25:75; 50:50; 75:25; and 100:0 (w/w). Cereal quality was determined based on the value of carbohydrate, protein, fat, fiber, water, and ash content. The results showed that the protein, fat, water, and ash content met the SNI standard, while the fiber content was still higher than the maximum SNI limit. Statistically, the treatment of the ratio of coconut and soy milk pulp flour had a significant effect on all cereal quality parameters (sig. 0.00 < α (0.05)). The high cereal protein content was found in all levels, namely in the range of 14.29-21.14%, while the fat content was in the range of 17.8-34.41%. The use of a 0:100 ratio produces carbohydrate content that meets SNI, which is more than 60%. The use of a combination of coconut pulp and soy milk pulp for the manufacture of cereals that needs to be developed is 25:75 (w/w), however still needs further modifications to reduce fiber content and increase the carbohydrate content.
Pelatihan Pembuatan Makanan Fungsional Berbasis Tepung Ampas Kelapa dan Tepung Kelor pada Ibu-Ibu PKK di Desa Binangga Kecamatan Marawola Kabupaten Sigi Sardi, Bambang; Puspitasari, Dwi Juli; Sumarni, Ni Ketut; Nurhaeni, Nurhaeni; Maulana, Asad; Amiluddin, Muh. Rafiq; Wulandari, Asri; Miswan; Saifah, Andi; Mahfud, Mahfud
Sewagati Vol 8 No 5 (2024)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v8i5.1939

Abstract

Keberadaan kasus stunting dan pertumbuhan ekonomi yang lambat di Desa Binangga menjadi pendorong untuk melakukan pengabdian. Metode yang digunakan dalam menangani kasus melalui pendekatan barbasis produk daerah. Makanan fungsional dari tepung ampas kelapa dan daun kelor dapat digunakan untuk menangani stunting dan menumbuhkan ekonomi masyarakat. Penanganan stunting dan pemulihan ekonomi dilakukan melalui beberapa tahapan yaitu persiapan, produksi, standarisasi, penerapan, dan evaluasi. Tahapan persiapan meliputi indentifikasi dan diskusi masalah, serta sosialisasi dan penerapan pembentukan produk diikuti 45 orang yang terdiri dari ibu-ibu PKK, kader puskesmas, orang tua yang anaknya terindikasi stunting, dan petani kelapa. Dari identifikasi dan koordinasi dengan ibu-ibu PKK diperoleh data sekitar 10 anak yang terindikasi stunting berdasarkan jenis kelamin, usia, tinggi, dan berat badan anak. Tahapan selanjutnya dilakukan produksi dan standarisasi makanan fungsional. Tahapan penerapan dan evaluasi dilakukan dengan intervensi makanan fungsional selama 2 minggu dan pengukuran tinggi dan berat badan anak setiap minggu. Diperoleh hasil telah terjadi pertambahan tinggi dan berat badan anak rata-rata masing-masing 0,71 cm dan 0,48 kg tiap minggu. Keberhasilan intervensi makanan fungsional dalam meningkatkan tinggi dan berat badan anak dapat menjadi alternatif penanganan stunting. Keberhasilan ini juga dapat menjadi motivasi buat ibu-ibu PKK untuk mengembangkan dan memasarkan berbagai produk melalui platform digital.
Reduksi Kandungan Zat Aktif Anionik dalam Limbah Laundry dengan Memanfaatkan Kombinasi Zeolit dari Tongkol Jagung dan Pseudomonas aeruginosa: Reduction of Anionic Surfactant Content in Laundry Wastewater by Utilizing a Combination of Zeolite from Corn Cobs and Pseudomonas aeruginosa Nea, Sirah Diniati; Nurhaeni; Puspitasari, Dwi Juli; Prismawiryanti; Inda, Nov Irmawati; Sumarni, Ni Ketut; Ruslan
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 1 (2024): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i1.16982

Abstract

The increasing environmental pollution is one of the consequences of human activities that continue to expand. The environment has limitations in coping with pollutants generated by humans, such as waste from the laundry industry. This research aims to evaluate the combined effect of zeolite produced from corn cobs and the use of microorganisms capable of degrading anionic surfactants, with the goal of reducing the concentration of anionic surfactants in laundry wastewater. The methods used include adsorption using corn cobs as adsorbents and biodegradation using surfactant-degrading bacteria. Morphological observations using Scanning Electron Microscope (SEM) indicate that the produced zeolite has a crystal structure that stacks up like clumps of cubes. X-ray Diffraction (XRD) analysis shows that zeolite synthesized with a silica extraction ratio from corn cobs and sodium aluminate of 20:20 mL has been successfully conducted. The biodegradation process of anionic surfactants in laundry wastewater using a combination of synthesized zeolite and Pseudomonas aeruginosa bacteria employing the Methylene Blue Alkyl Substance (MBAS) method has shown a decrease in concentration to 1.66 mg/L and degradation of 33.55%, especially in sample 3 with variations of 7.5 grams of corn cob zeolite and 15% microorganisms, during a 5-day experiment.
pH Effect, Isothermal Adsorption, and Adsorption Kinetic Study of Copper(II) Ion into PVA/Alginate Beads Containing Banana Peels Satrimafitrah, Pasjan; Inda, Nov Irmawati; Ketut Sumarni, Ni; Sarapun, Veky; Fridian Aprilia, Natasya; Shiomori, Koichiro
The Journal of Pure and Applied Chemistry Research Vol. 12 No. 3 (2023): September-December 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.03.3319

Abstract

Banana peels have been widely used as a biosorbent for metal ion adsorption. However, the small size of banana peels as a biosorbent leads to difficulty in the separation process of banana peels from the aqueous solution. Thus, the banana peels were impregnated into PVA/Alginate beads to increase the biosorbent size using the (W/O) emulsion process. Various amounts of banana peels were impregnated into beads. The obtained beads were used to adsorb copper(II) ions from aqueous solutions. The result shows that beads could extract the copper(II) ion from an aqueous solution containing 0.7875 ppm copper(II) ion at pH 4 with the quantity of extraction was 0.729 mmol/g. The effect of contact time and initial concentration indicates that the adsorption process of copper(II) ion from aqueous solution using beads follows the Langmuir isothermal adsorption and the adsorption kinetic follows the pseudo-second-order equation. Hence, the adsorption mechanism follows a chemisorption process with monolayer formation on the PVA/Alginate containing banana peels. Further investigation was carried out and found that the surface reaction and film diffusion occurred at initial stage of contact time, adsorptive diffusion through pores occurred at the later stage.
Sintesis dan Karakterisasi Komposit Mn-N-TiO2/Bentonit untuk Degradasi Polutan Organik: Synthesis and Characterization of Mn-N-TiO2/Bentonite Composite for Organic Pollutants Degradation Ruslan; Prismawiryanti; Sumarni, Ni Ketut; Ridhay, Ahmad; Riski, Mutiara Zalfa; Nurhalisa, Sitti; Marsela, Anggi
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 3 (2024): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i3.17502

Abstract

Research has been conducted on the synthesis and characterization of Mn-N-TiO2/Bentonite composites for the degradation of organic pollutants. This study aims to synthesize the Mn-N-TiO2/Bentonite composite as a catalyst in degrading congo red in visible light and to determine the effect of irradiation time on the effectiveness of photodegradation of congo red catalyzed Mn-N-TiO2/Bentonite. The synthesis of the Mn-N-TiO2/Bentonite composite was carried out using the sol-gel method. Characterization was carried out with UV-Vis DRS, XRD, FTIR, and SEM-EDX. A photocatalytic activity test on Congo red degradation was carried out using ultraviolet and visible lamps. The results of the characterization of the Mn-N-TiO2/Bentonite configuration show that the band gap energy of Mn-N- TiO2/Bentonite with a variation of 5 g has a band gap energy of 2.14 eV with anatase crystal form. In the IR spectrum, there is a shift in wave number from 1634.49 to 1433.11cm-1, there is the vibration of the NO bond, absorption below 1000 cm-1 indicates the presence of Mn-O bonds, and absorption at wave number 1049.28 cm-1 indicates the presence of ions. manganese metal trapped in the TiO2 matrix. This spectrum indicated the presence of manganese and nitrogen. These results were confirmed by the EDX instrument, which showed the presence of 0.60% Mn and 0.04% N. SEM results show that particles that are still agglomerated and have a large size, which is influenced by water vapor in the TiO2 crystal structure. The results showed that the photodegradation activity increased significantly up to 40.9075% at 30 minutes of irradiation for the Mn-N- TiO2/Bentonite composite and 20.0225% under exposure to ultraviolet light.
Modification & Characterization of Activated Carbon Impregnated with KCl, Na2S, and KI for Enhancing Mercury (Hg) Removal from Natural Gas Muala, Bahran; Sumarni, Ni Ketut; Puspitasari, Dwi Juli
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.40876

Abstract

Modified activated carbon (MAC) has been synthesized and characterized to enhance mercury (Hg) removal from natural gas. MAC was modified by impregnating it into KCl, Na2S, and KI to introduce Cl-, S-, and I- elements. SEM-EDX, FTIR, and SAA were used to characterize the AC and MAC. The isotherm and adsorption capacity were studied using the mercury gas standard. The results of SEM-EDX analysis show that the impregnation method is proven to produce MAC containing elements Cl, S, and I with mass % of 2.78% Cl, 0.76% S, and 39.60% I. The surface area is 421.91 m2/g, the total pore volume is 0.386825 cc/g, and the average pore size is 1.83369 nm. Group functions are -OH, C=C, C=O, C-O, and vibrations at the wavelength number 617.81 cm-1, which the impregnation agent forms. The mechanism for absorbing mercury gas into MAC follows the Freundlich isotherm model, with a coefficient of determination (R2) of 0.996. The adsorption capacity on MAC increased 57 times compared to unmodified activated carbon (AC) from 5540.60 to 315730.64 ng/g, with an efficiency maximum of 100%. The MAC has been proven to enhance mercury adsorption from natural gas with an efficiency of 78.6%.
Co-Authors A.A. Ketut Agung Cahyawan W Abd. Rahman Abd. Rahman Razak Abd. Rahman Razak Abd. Rahman Razak Razak Ahmad Ridhay Aini Auliana Amar Amiluddin, Muh. Rafiq Andi Saifah Anita Anita Asri Wulandari Ayu Anggraini Puspitasari Bambang Sardi Darman Panggalo Dewi Irtawati, Dewi Dharmayanti, Gusti Ayu Putu Candra Diharnaini Diharnaini Djumidar Dwi Juli Puspitasari Efin Lestari Eka Dwiyanti Tombilayuk Erwin Abdul Rahim Evi Sulastri firmasari firmasari Fisty Sumangkut Fridian Aprilia, Natasya Gilang Almilda Hardi Ys Hardi Ys. Henny H. Veronika Husain Sosidi I Nyoman Adi Putra I Nyoman Yudha Astana Ida A M D Yadnyani Inda, Nov Irmawati Indriani Indriani Jaya Hardi Jusman, Jusman Khaerunisa Khaerunisa, Khaerunisa Khairuddin Khairuddin Kostriana Daniel Laksono Trisnantoro Lewi Michal Pakiding Lisma Habiba Lutvina Vitasari Mahfud Mahfud Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Mappiratu Marsela, Anggi Maulana, Asad Minda M Miswan Moh. Mirzan Moh. Rifki Saputra Muala, Bahran Musafira Musafira Musafira Musafira Musafira Musafira Nea, Sirah Diniati Nov Irmawati Inda Nov Irmawati Inda Novitaliani Kea Nur Istiqomah Nurfita Sari Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhaeni Nurhalisa, Sitti Nurlina Ibrahim Nurviani Nurviani Pasjan Satrimafitrah Prismawiryanti Prismawiryanti Putri Wahyuni Rahma Wati Rahmawati Rahmawati Riski, Mutiara Zalfa Ruslan Ruslan Ruslan Sarapun, Veky Serli Jayanti Setyaningrum, Annisa Shiomori, Koichiro Sopyan Sopyan Sulfitri Suardi Sumarni Syaiful Bahri Syaiful Bahri Syaiful Bahri Syamsuddin Syamsuddin Syamsuddin Sylvia Florensy Bawias Ulayya Kasio Umma Fahriah Soleh Vitasari Vitasari Windi Windi Yana Silvia Mauru Yesy Febriyanti Yovita Yovita