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All Journal Indonesia Chimica Acta Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Majamecha Equilibrium Journal of Chemical Engineering COVIT KOLONI Jurnal Kimia dan Rekayasa Jurnal Teknologi Kimia Mineral
Dian Ranggina
Politeknik Negeri Ujung Pandang
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Pemanfaatan Ekstrak Belimbing Wuluh (Avverhoa bilimbi L.) Menjadi Sabun Cuci Piring Zakiyah Darajat; Dian Ranggina; Harun Pampang; Afriyanti S. Lamuru; Muhammad Arham Yunus; Maria Assumpta Nogo Ole; Nurfiansyah Nurfiansyah
COVIT (Community Service of Tambusai) Vol. 2 No. 2 (2022): SEPTEMBER 2022
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/covit.v2i2.18389

Abstract

Wuluh star fruit is a plant that is rich in benefits. The population of this plant is very abundant in the community both in the yard or as a shade plant in the yard. The population of this plant is not proportional to its utilization so that the star fruit usually falls and rots. Seeing this, a community service activity was carried out regarding the use of starfruit into dish soap, which besides being able to add to the economic value of starfruit, can also reduce environmental pollution. Wuluh star fruit (Averrhoa bilimbi L.) contains saponins, flavonoids, acetic acid, and vitamin C. Saponins have the ability to kill bacteria while flavonoids can destroy bacterial proteins by lysis method so that bacteria cannot reproduce and die. Saponins also function as a foam producer so that they can be used in the manufacture of dish soap. Keywords: Wuluh star fruit, saponin, dish soap
Comparative Study of Synthesis and Characterisation of Complex Compounds of Co(II) and Fe(III) Metal Ions with Ligands N-Etilisopropyldithiocarbamate and Its Application as an Additive in Lubricants Dian , Ranggina; Yunus, Muhammad Arham; Afrianti S, Lamuru; Indah , Raya
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 17, No 1: June 2024
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/ica.v17i1.34606

Abstract

The aim of the synthesis and characterization of Co(II) and Fe(III) metal ions with N-Ethylisopropyldithiocarbamate ligands is to produce dithiocarbamate complex molecules that can be utilized in pharmacology, industry, agriculture, and chemistry in the future. The in situ method, which involves reacting secondary amines with carbon disulfide in ethanol solvent (dithiocarbamate ligands) and metals dissolved in ethanol solvent (metal ions), was used to synthesize complicated chemicals. Melting point, conductivity value, FT-IR, and UV-Vis analyses were used to characterize complicated compounds. The resulting Co(II)-N-Etilisopropyldithiocarbamate complex compounds are black in color and Fe(III)-N-Ethylisopropyldithiocarbamate are dark green, with a yield of 64.12% and 41.87%, respectively, with different conductivity values,≠0 (electrolyte compound). From the results of the FT-IR analysis, the presence of Co-S bonds was identified at the absorption band of 362.62 cm-1 and Fe-S at the absorption band of 354.90 cm-1. Maximum wavelength absorption UV-Vis, Co(II) (λmax = 330 nm) > Fe(III) (λmax = 310 nm). Characterization results based on the measurement of kinematic viscosity values, Fe(III)-N-ethylisopropyldithiocarbamate complex compounds are more effective as the additives in lubricants than Co(II)-N–Ethylisopropyldithiocarbamate at a temperature of 100 oC.
SINTESIS SENYAWA KOMPLEKS MN(II) N-ETILISOPROPILDITIOKARBAMAT SEBAGAI ZAT ADITIF PADA BAHAN PELUMAS Ranggina, Dian; Raya, Indah; Junianti, Fitri
JURNAL TEKNOLOGI KIMIA MINERAL Vol 2 No 1 (2023): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (287.824 KB) | DOI: 10.61844/jtkm.v2i1.458

Abstract

Senyawa N-Etilisopropildiokarbamat dapat disintesis dengan ion logam yaitu Mn (II) dari unsur transisi dalam upaya menemukan zat aditif yang baik untuk bahan pelumas. Senyawa kompleks ditiokarbamat digunakan sebagai zat aditif dalam pelumas dapat mengurangi gesekan sehingga dapat meningkatkan efisiensi bahan bakar kendaraan bermotor. Senyawa kompleks Mn(II)-N-Etilisopropilditiokarbamat disintesis dengan metode  in situ, yaitu dengan penambahan 6 mmol N-etilisopropilamin, 6 mmol karbon sulfida, 2 mmol larutan logam MnSO4.H2O dan dilakukan karakterisasi senyawa kompleks dengan penentuan titik didih, analisis UV-Vis, FT-IR, konduktometer serta pengujian kekentalan ini dilakukan dengan menggunakan alat kinematic viscosity bath pada temperatur 40 0C dan  100 0C dengan mengukur waktu alir sampel pada viscosimeter. Data yang diperoleh menunjukkan bahwa sintesis senyawa kompleks Mn(II)-N-Etilisopropilditiokarbamat merupakan senyawa non elektrolit (muatannya = 0) dengan titik leleh 399,9 0C, spektrum hasil analisa UV-Vis menunjukkan puncak pada panjang gelombang  230 nm, 250 nm, 310 nm, analisis FT-IR untuk jarak dekat (4000-300 cm-1) kompleks Mn(II)-N-etilisopropilditiokarbamat terdapat puncak serapan yang kuat pada bilangan gelombang 2970,38 cm-1 yang menyatakan bahwa senyawa tersebut  mempunyai gugus C-H alifatik dengan diperkuat oleh adanya serapan gugus metilen pada 1473,62 cm-1 dan gugus metil pada 1411,89 cm-1 ,serapan 1195, 87 cm-1 menunjukkan vibrasi rentangan N-C-S. Hasil karakterisasi senyawa kompleks logam Mn(II) dengan ligan N-etilisopropilditiokarbamat dapat dijadikan sebagai zat aditif pada pelumas yang lebih efektif pada suhu 100 oC daripada suhu 40 oC.
Pembuatan Briket dengan Variasi Ukuran Partikel Cangkang Kelapa Sawit (CKS) dan Tandan Kosong Kelapa Sawit (TKKS) Junianti, Fitri; Diana, Sri; Ramdhani , Anugrah; Lestari , Rianti Indah; Assagaf, Iman Pradana A.; Ranggina, Dian
Majamecha Vol. 6 No. 1 (2024): Majamecha
Publisher : Program Studi Teknik Mesin, Fakultas Teknik, Universitas Islam Majapahit, Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamecha.v6i1.3297

Abstract

Biomassa dapat dijadikan sebagai salah satu sumber energi yang ramah terhadap lingkungan dengan tidak mengandung unsur sulfur penyebab polusi udara. Biomassa di Indonesia ketersediaannya cukup melimpah baik yang berasal dari limbah pertanian, perkebunan maupun dari industri. Pada industri pengolahan sawit, cangkang kelapa sawit (CKS) dan tandan kosong kelapa sawit (TKKS) merupakan limbah biomassa dengan komposisi cangkang kelapa sawit terdiri dari 53,85% lignin, 26,16% hemiselulosa, dan 6,92% selulosa serta nilai kalor yang tinggi sehingga dapat memenuhi kriteria sebagai bahan bakar briket. Selain nilai kalor yang tinggi, kualitas briket juga dipengaruhi oleh nilai kadar air dan kadar abu yang rendah. Pada pembuatan briket beberapa hal yang menjadi faktor penting seperti penggunaan jenis perekat, komposisi bahan baku dan ukuran partikel. Olehnya itu pada penelitian ini akan dilakukan pembuatan briket dengan memvariasikan ukuran partikel dari CKS dan TKKS. Penelitian ini terdiri dari tiga tahapan. Tahapan pertama merupakan preparasi cangkang dan tandang kelapa sawit secara mekanik dan karbonisasi. Selanjutnya tahapan kedua, pembuatan briket dengan perbandingan bahan baku dan perekat 10:1 pada variasi ukuran partikel 60, 80, dan 100 mesh. Tahapan terakhir yaitu analisa kualitas briket terdiri dari kadar air, kadar abu, kadar zat terbang, dan nilai kalor. Hasil penelitian untuk semua variasi ukuran partikel telah memenuhi SNI 01-6235-2000 tentang briket arang. Pada pengujian kadar air, kadar abu, dan zat terbang terjadi penurunan sejalan dengan semakin kecilnya ukuran partikel. Kadar air terendah pada sampel briket ukuran 100 mesh sebesar 4,9197%, untuk kadar abu sebesar 3,9698%, dan kadar zat terbang terendah pada sampel ukuran partikel 100 mesh sebesar 10,1453%. Nilai kalor yang dihasilkan dari ukuran partikel yang semakin kecil cenderung meningkat. Nilai kalor tertinggi pada sampel briket ukuran partikel 100 mesh sebesar 6257 kal/g.
Application of Subcritical Water Hydrolysis (SCW) in Producing Reducing Sugar for Biofuel Production Dian Ranggina; Maria Assumpta Nogo Olea; Hanny F. Sangian; Arief Widjaja; Hijrah Amaliah Azis
Equilibrium Journal of Chemical Engineering Vol 8, No 2 (2024): Volume 8, No 2 December 2024--Online First
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v8i2.86196

Abstract

Abstract. This work aimed to produce reducing sugar from coconut husk using subcritical water hydrolysis. Coconut husk contains cellulose and hemicellulose that can be converted into reducing sugars and then fermented into biofuel. In this study, the subcritical water hydrolysis was carried out in a batch reactor at  temperatures 120-260 oC and pressures, 40, 80, and 160 bar for 1 h. Subcritical water method obtained two products, namely (a) liquid containing sugar and (b) solid containing cellulose, hemicellulose and lignin. The liquid sugars were analyzed by HPLC and DNS, while crystal structure was characterized by XRD and SEM. The highest yield of reducing sugar obtained was 0.25 g/g cellulose+ hemicellulose at 150 oC and 80 bar.Keywords: Biofuel, Coconut husk, Lignocellulose, Reducing sugar, Subcritical water
Pengaruh Suhu dan Ion Logam Terhadap Potensi Senyawa Kompleks Ditiokarbamat Sebagai Zat Aditif Pada Pelumas Ranggina, Dian; Darajat, Zakiyah; Yunus, Muhammad Arham; Nurfiansyah, Nurfiansyah
KOLONI Vol. 1 No. 4 (2022): DESEMBER 2022
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/koloni.v1i4.94

Abstract

The ideal quality of lubricant can be obtained by adding additives. One of the functions of additives in lubricants is to maintain viscosity against temperature changes. Dithiocarbamate complexes with heavy metals have very low solubility in water so that dithiocarbamate compounds have great potential as additives in lubricants. This research was conducted in an effort to determine the effect of temperature (40 oC and 100 oC) on the viscosity of the lubricant and metal ions (Mn2+, Fe3+, Co2+) in the synthesis of dithiocarbamate complex compounds on their potential as additives in lubricants. This compound was synthesized by in situ method and to measure and compare the viscosity of the lubricant before and after the addition of the complex compound as an additive.The results showed that complex compounds from N-ethylisopropylditiocarbamate ligands could be synthesized with metal ions Mn(II), Fe(III) and Co(II). Where is the synthesis of complex compounds obtained yields Mn(II)-N-ethylisopropylditiocarbamate amounted to 49.59%, Fe(III)-N-Ethylisopropyldithiocarbamate of 41.81%,and Co(II)-N-Etilisopropil ditiocarbamate by64.12%.From the results of the characterization of the viscosity test, it can be seen that temperature and metal ions in complex compounds affect their potential effectiveness as additives in lubricants. Of the three complex compounds it is more effective at 100 oC than 40 oC, where metal ions Mn (II) are more effective than Fe(III) and Co (II). Keywords: Lubricants, additives, metal ions, temperature, dithiocarbamate.
Preparation and Characteristics of Kluwak Shell Carbon Adsorbent HR, Yuliani; Ranggina, Dian; Janna, Miftahul; Fadhila, Zulham Nurul; Budiman, Arif
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 9, No 1 (2024): EDISI MARET 2024
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v9i1.5171

Abstract

Kluwak shell carbon (KTK) is a biomass with potential as an adsorbent, containing cellulose, hemicellulose, lignin, and fixed carbon at a content of 92.15%. However, the current utilization of KTK in adsorbing free fatty acids and methylene blue is limited and can be improved through thermal activation at a range of temperatures. The study aims to investigate the impact of activation temperature on CEC by examining the adsorption capacity of methylene blue solution, iodine solution, and surface area. Activation was carried out for 2 hours at temperatures ranging from 500 to 900 C on Kluwak shell carbon. The adsorbent performance of the activated KTKAT was initially tested using methylene solution with a concentration of 50 ppm, a volume of 50 ml, and 0.15 grams of KTKAT. The solution was placed in an orbit shaker for 90 minutes and filtered. The absorbance of the filtrate adsorption results was measured at a wavelength of 662 nm using UV VIS. For the second test, 50 ml of 0.1 N Iodine and 0.5 g KTKAT were stirred for 15 minutes and then centrifuged for approximately 15 minutes. A volume of 10 ml of the resulting iodine solution adsorption filtrate was titrated with 0.1 N Sodium Thiosulfate. The surface area was determined using the BET method. The concentration (ppm) of methylene blue solution was determined by converting the absorbance measurement using the standard curve equation. The iodine number was determined by titrating the iodine adsorption filtrate with sodium thiosulfate (ml). These data show that there is an obvious correlation between activation temperature and methylene blue absorbance, iodine number, and surface area. At 800°C, the methylene blue adsorption is 12.41 mg/g, the iodine number is 875.61 mg/g, and the surface area is 561.404 m²/g.
Methylene Blue adsorption utilizing kluwak shell carbon adsorbent: Adsorpsi Methylene Blue Menggunakan Adsorben Karbon Tempurung Kluwak Yuliani , HR; Ranggina, Dian; Fadhilah Sulham, Nurul; Janna, Mifthahul; Aisyah; Nayla; Ananda, Rezky; Sabillah, A. Isyana; Astuti Herawati, Dewi
Jurnal Kimia dan Rekayasa Vol. 4 No. 2 (2024): Jurnal Kimia dan Rekayasa Edisi Januari 2024
Publisher : Program Studi S1 Teknik Kimia, Fakultas Teknik, Universitas Setia Budi

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

Abstract

Kluwak shell carbon (KTK) is an eco-friendly adsorbent made from kluwak fruit biomass. The objective of this study is to investigate the impact of physical activation on KOH-activated kluwak shell carbon (KTKOH) within the temperature range of 500 - 900 oC, and to compare it with H3PO4-activated KTK (KTKH3PO4) and KTK. The performance of the adsorbent was evaluated by determining the maximum adsorption capacity (qm) of Methylene Blue (MB) using the Langmuir equation and the surface area of the Brunnaeur Emmet and Teller (BET) method. The Methylene Blue batch system was subjected to isotherm adsorption for 90 minutes, with a stirring speed of 220 rpm, 0.25 grams of adsorbent, and 50 ml at 6 concentrations of MB ranging from 60 to 200 ppm. The study found that the adsorbent performance can be improved by combining chemical and physical activation at temperatures ranging from 500 to 800 oC. KTKOH and KTKH3PO4 at 700 oC increased the adsorbent's qm and surface area. The maximum adsorption capacity and surface area were achieved of KTKOH700 and KTKH3PO4700 at a higher temperature than KTK. The study found that the optimal condition for adsorption capacity was achieved for KTKOH700, resulting in a maximum adsorption capacity value of 44.47 mg/g and a surface area of 269.74 m2/g, KTKH3PO4700 activation resulted in a qm of 59.55 mg/g and A of 427.26 m2/g. The kluwak shell carbon had a maximum adsorption capacity value of 30.75 mg/g and a surface area of 166.21 m2/g. AbstrakKarbon tempurung kluwak (KTK) merupakan adsorben ramah lingkungan yang berasal dari biomassa buah kluwak. Penelitian ini bertujuan untuk mengetahui pengaruh aktivasi fisika pada karbon tempurung kluwak teraktivasi KOH (KTKOH) kisaran suhu 500 – 900 oC dan membandingkan dengan KTK teraktivasi H3PO4 (KTKH3PO4) dan KTK. Kinerja adsorben ditentukan melalui penentukan kapasitas adsorpsi maksimum (qm) Methylene Blue (MB) menggunakan persamaan langmuir dan luas permukaan metode Brunnaeur Emmet and Teller (BET). Isotherm adsorptionMethylene Blue sistem batch selama 90 menit, kecepatan pengadukan 220 rpm, 0.25-gram adsorben dan 50 ml pada 6 konsentrasi MB range 60-200 ppm. Hasil penelitian menunjukkan bahwa kombinasi aktivasi kimia dan aktivasi fisika pada suhu 500 – 800 oC dapat meningkatkan kinerja adsorben. Aktivitasi KTKOH dan KTKH3PO4 pada 700oC juga meningkatkan qm serta luas permukaan adsorben. Kapasitas adsorpsi maksimum dan luas permukaan untuk KTKOH700 dan H3PO4700 lebih tinggi dibandingkan KTK. Kondisi optimal penelitian bahwa kombinasi aktivasi KTKOH700 memiliki nilai kapasitas adsorpsi maksimum 44.47 mg/g dengan luas permukaan 269.74 m2/g dan KTKH3PO4700 didapatkan qm sebesar 59.55 mg/g serta A seluas 427.26 m2/g. Nilai qm 30.75 mg/g dan A sebesar 166.21 m2/g untuk karbon tempurung kluwak.
Co-Authors Afrianti S, Lamuru Afriyanti S. Lamuru Aisyah Ananda, Rezky Arief Widjaja Arif Budiman Assagaf, Iman Pradana A. Astuti Herawati, Dewi Fadhila, Zulham Nurul Fadhilah Sulham, Nurul Hanny F. Sangian Harun Pampang Hijrah Amaliah Azis HR, Yuliani Indah , Raya Indah Raya Janna, Miftahul Janna, Mifthahul Junianti, Fitri Lestari , Rianti Indah Maria Assumpta Nogo Ole Nayla Nurfiansyah Nurfiansyah Nurfiansyah, Nurfiansyah Ramdhani , Anugrah Sabillah, A. Isyana Sri Diana Yuliani , HR Yunus, Muhammad Arham Zakiyah Darajat Zakiyah Darajat