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Adsorpsi Ion Mn(II) Pada Zeolit yang Disintesis dari Abu Dasar Batubara Termodifikasi Ditizon Riandy Putra
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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

Adsorption characteristic of Mn(II) on zeolite synthesized from bottom ash with alkaline hydrothermal conditions loaded with dithizone have been examined. The parameters studied includes effect of pH, contact time, initial concentrations and temperature of Mn(II) by batch experiments. The raw and modified samples were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transformation infra red (FT-IR) and Surface area analyzer (SAA) and used for the removal of Mn(II) from aqueous solution. This research shows Si and Al contents of the bottom ash analysed by XRF spectrometry dominant were used for the alkaline hydrothermal conversion of the bottom ash compounds into zeolite with range SiO2/Al2O3 ratio obtained from 1 to 5. The results of XRD and FTIR showed that the activation with reflux of bottom ash by alkali hydrothermal process can produce a material which has a similar structure zeolite (zeolite-like). Hydrothermal product consists of a mixture of zeolite (zeolite Y, zeolite Na-P and zeolite X) and sodalite crystals at temperatures of 100 °C for 24 hours. Hydrothermal product showed specific IR absorption zeolite at wavenumber 300-1250 cm-1and zeolite modified dithizone showed absorption -NH and –SH at wavenumber 1496,76 and 2461,17 cm-1. The results SAA showed that with addition dithizone lowering the specific surface area of zeolite from 160,262 m²/g to 69,609 m²/g. Results of study show that adsorption of Mn(II) reaches its maximum values at pH 6 for zeolite and pH 8 for zeolite modified dithizone, respectively. The adsorption kinetics based on the pseudo-second-order rate equation indicates that the rate limiting step involving a chemical reaction. The adsorption rate constants for zeolite synthesis -0,014g/mg.min-1and for the zeolite modified dithizone 0,0204g/mg.min-1. Based on the Langmuir equation, the maximum adsorption capacity (qmax) synthetic zeolite of 2.63x10-4mol/g and zeolite modified dhitizone 2.88x10-4mol/g. Adsorption equilibrium constant for the synthetic zeolite 0,742 mg/L and for zeolite modified dithizone 2,625 mg/L. The negative ΔH and ΔS indicate an exothermic and spontaneous process. But value of ΔG is positive, which indicates that the reaction is not spontaneous. So, adsorption using two adsorbents takes place spontaneously at a lower temperature. In general, the ability of dithizone-loaded zeolite to adsorb Mn(II) is better than does the unmodified one.

Fe/Indonesian Natural Zeolite as Hydrodeoxygenation Catalyst in Green Diesel Production from Palm Oil Riandy Putra; Witri Wahyu Lestari; Fajar Rakhman Wibowo; Bambang Heru Susanto
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 2 Year 2018 (August 2018)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.2.1382.245-255

The Petroleum diesel-based fossil fuel remains the primary source of energy consumption in Indonesia. The utilization of this unrenewable fuel depletes fossil fuels; thus, an alternative, renewable fuel, such as one based on biohydrocarbon from biomass-green diesel-could be an option. In this work, green diesel was produced through the hydrodeoxygenation from palm oil and processed in a batch-stirred autoclave reactor over natural zeolite (NZ) and NZ modified with 3 wt.% Fe metal (Fe/NZ) as heterogeneous catalyst. NZ showed high crystallinity and suitability to the simulated pattern of the mordenite and clinoptilolite phases according to X-ray diffraction (XRD) analysis. The presence of Fe metal was further confirmed by XRD, with an additional small diffraction peak of Fe0 that appeared at 2θ = 44-45°. Meanwhile, NZ and Fe/NZ were also characterized by Scanning electron microscopy (SEM) with Energy Dispersive X-ray (EDX), X-ray Fluorescence (XRF), and Surface Area Analyzer (SAA). The obtained materials were tested for the conversion of palm oil into diesel-range hydrocarbons (C15-C18) under conditions of 375 °C and 12 bar H2 for 2 h. NZ and Fe/NZ produced a liquid hydrocarbon with straight-chain (C15-C18) alkanes as the most abundant products. Based on Gas Chromatography-Mass Spectrometry (GC-MS) measurement, a higher conversion of palm oil into diesel-like hydrocarbons reached more than 58% and 89%, when NZ and Fe modified NZ (Fe/NZ), respectively were used as catalysts.

ADSORPSI ION MN(II) PADA ZEOLIT DARI ABU DASAR BATUBARA TERMODIFIKASI DITIZON Riandy Putra; Khamidinal Khamidinal; Didik Krisdiyanto; Irwan Nugraha
Jurnal Kimia Terapan Indonesia Vol 17, No 2 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v17i2.25

Adsorption characteristic of Mn(II) on zeolite synthesized from bottom ash with alkaline hydrothermal conditions loaded with dithizone have been examined. The parameters studied includes effect of pH, contact time, initial concentrations and temperature of Mn(II) by batch experiments. The raw and modified samples were characterized by XRF, XRD, FT-IR and SAA. The results of XRD and FTIR showed that hydrothermal product consists of a mixture of zeolite (zeolite Y, zeolite Na-P and zeolite X) and sodalite crystals. Hydrothermal product showed specific IR absorption zeolite at wavenumber 300-1250 cm-1 and zeolite modified dithizone showed absorption -NH and â€“SH at wavenumber 1496,76 and 2461,17 cm-1. The results SAA showed that with addition dithizone lowering the specific surface area of zeolite from 160,262 mÂ²/gÂ to 69,609 mÂ²/g. Results of study show that adsorption of Mn(II) reaches its maximum values at pH 6 for zeolite and pH 8 for zeolite modified dithizone, respectively. The adsorption kinetics based on the pseudo-second-order rate equation with adsorption rate constants for zeolite synthesis -0,014 g/mg.min-1and for the zeolite modified dithizone 0,0204 g/mg.min-1. Based on the Langmuir equation, the maximum adsorption capacity (qmax) synthetic zeolite of 14,493 mg/g and zeolite modified dhitizone 15,873 mg/g. Termodynamic parameter indicated thatadsorption using two adsorbents takes place spontaneously at a lower temperature.Keywords: Bottom ash, zeolite, hydrothermal, dithizone, adsorption

A Review: Development of Photocatalyst Materials and Its Performance for Humic Acid Removal in Peatwater Siti Unvaresi Misonia Beladona; Riandy Putra; Rokiy Alfanaar; Miranti Maya Sylvani; Elda Alyatikah; Riaa Safitri; Indri Susanti; Rendy Muhamad Iqbal
Journal of Peat Science and Innovation Vol. 1 No. 1 (2022): Journal of Peat Science and Innovation: June 2022
Publisher : Center for Development of Science, Technology and Peatland Innovation (PPIIG), University of Palangka Raya

Peat is a wetland region in Indonesia with a very high water storage capacity. However, the amount of humic compounds obtained from the accumulation of organic substances in peat makes the water unable to be used for daily purposes. Peat water treatment with several methods has been carried out, such as coagulation, electrocoagulation, flocculation, and filtration. However, the result of clumping or filtering in such a way raises new environmental problems. One method which effective and efficient used in peat water treatment is photocatalytic. Several materials based-semiconductor was developed as a photocatalyst, another modification of photocatalyst is combining the adsorbent as a porous supporting photocatalyst which can improve its performance.

Identifikasi Lemak Tikus Pada Bakso Daging Sapi di Km 9 Palembang dengan Instrumen Fourier Transform Infrared (FTIR) hernanda, muhammad; Saputri, Risma Dewi; Sari, Luffiya Yulia; Marlina, Rini; Putra, Riandy
ALKIMIA Vol 3 No 2 (2019): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

ABSTRAK Masalah kehalalan produk pangan di Indonesia mendapat perhatian khusus adanya cemaran daging bersifat non-halal. Salah satunya daging tikus pada produk halal makanan bakso KM 9 Palembang. Percobaan ini diharapkan dapat menjadi salah satu dasar tercapainya penjaminan produk halal terhadap produk bakso sapi, agar tidak tecemar daging tikus non-halal. Penggunaan spektrofotometri FTIR digunakan untuk mengidentifikasi adanya daging tikus pada bakso sapi secara kualitatif. Sampel bakso sapi diekstrak dengan kloroform menggunakan corong pisah pada suhu ruang. Hasil analisa menunjukkan bahwa tidak terdapat cemaran tikus pada bakso daging sapi yang dibuktikan oleh spektra FTIR dan uji kualitatif yang telah dilakukan. Kata Kunci: Bakso Sapi; Fourier Transform Infrared; Lemak Tikus; Produk Halal

Fe/Indonesian Natural Zeolite as Hydrodeoxygenation Catalyst in Green Diesel Production from Palm Oil Riandy Putra; Witri Wahyu Lestari; Fajar Rakhman Wibowo; Bambang Heru Susanto
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 2 Year 2018 (August 2018)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.2.1382.245-255

The Petroleum diesel-based fossil fuel remains the primary source of energy consumption in Indonesia. The utilization of this unrenewable fuel depletes fossil fuels; thus, an alternative, renewable fuel, such as one based on biohydrocarbon from biomass-green diesel-could be an option. In this work, green diesel was produced through the hydrodeoxygenation from palm oil and processed in a batch-stirred autoclave reactor over natural zeolite (NZ) and NZ modified with 3 wt.% Fe metal (Fe/NZ) as heterogeneous catalyst. NZ showed high crystallinity and suitability to the simulated pattern of the mordenite and clinoptilolite phases according to X-ray diffraction (XRD) analysis. The presence of Fe metal was further confirmed by XRD, with an additional small diffraction peak of Fe0 that appeared at 2θ = 44-45°. Meanwhile, NZ and Fe/NZ were also characterized by Scanning electron microscopy (SEM) with Energy Dispersive X-ray (EDX), X-ray Fluorescence (XRF), and Surface Area Analyzer (SAA). The obtained materials were tested for the conversion of palm oil into diesel-range hydrocarbons (C15-C18) under conditions of 375 °C and 12 bar H2 for 2 h. NZ and Fe/NZ produced a liquid hydrocarbon with straight-chain (C15-C18) alkanes as the most abundant products. Based on Gas Chromatography-Mass Spectrometry (GC-MS) measurement, a higher conversion of palm oil into diesel-like hydrocarbons reached more than 58% and 89%, when NZ and Fe modified NZ (Fe/NZ), respectively were used as catalysts.

A Review on Development of Porous Aluminosilicate-Based Zeolite Adsorbent for Heavy Metal Pollution Treatment Muh. Supwatul Hakim; Rendy Muhamad Iqbal; Fildzah 'Adany; Riandy Putra; Ici Nitriany; Idam Sulastri Telaumbanua; Raya Uli Sitorus; Rey Kamala Dewi
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.1076

Heavy metal contamination endangers human health and has been identified as a global issue. The rising concentration of heavy metals in industrial and domestic wastewater has prompted the quest for effective technologies and treatments to remove them. Zeolite is a promising material for eliminating heavy metals from diverse sources that pollute wastewater. Zeolite is a crystal comprised of hydrated aluminosilicates of alkali and alkaline earth metals in a threedimensional crystal network composed of easily controllable SiO4 4− and AlO4 5− . This review focuses on the critical analysis of the application of several zeolites for the adsorption of heavy metals from wastewater, namely Cd(II), As(III and V), Cr(III and VI), Cu(II), Pb(II), Ni(II), Mn(II), and Hg(II). The results of heavy metal removal reported by zeolites are summarized, and the chemical modification of zeolites with acid/base/salt reagents, surfactants, and metal reagents has been investigated, compared, and discussed. The adsorption/desorption capabilities, systems, operational parameters, isotherms, and kinetics of zeolites are then explained and compared.

Chemical and physical activation of natural pyrite as potential inorganic pigment material Iqbal, Rendy Muhamad; Simarmata, Sari Namarito; Sinaga, Tiara Cristy; Simanjutak, Elfrida Roulina; Putra, Riandy; Khaerudini, Deni Shidqi
Konversi Vol 13, No 1 (2024): April 2024
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v13i1.16947

Pyrite is one of the minerals in Borneo Island. It has a disadvantage for soil quality due to its acidity properties. One of the main components of pyrite is iron, which promises to be utilized as an inorganic pigment. This research aims to transform pyrite into red-brown pigment material-based iron oxide. Pyrite mineral transformation through chemical and physical activation, followed by pigment characterization using XRF, XRD, FTIR, and FE-SEM. Based on the XRF result, the highest component is Fe, with a percentage up to 42%. This data is also suitable with an iron oxide phase from the diffractogram of pigment, followed by silica and alumina structure. The heating process successfully changed the color materials from gold to red-brown. Then, the molecular vibration of Fe–O also appears on FTIR spectra at a wavenumber of 483 cm-1 and T–O–T bending at 994 cm-1. Moreover, morphological observation exhibits the aggregation of particles and distribution of iron element spread on the overall area pigment. The color transformation into red-brown pigment can be obtained by pyrite processing into potential inorganic pigment material.

Implementasi Pembelajaran Kimia Secara Eksperimental Menggunakan Aplikasi Virtual Lab “Chemcollective” Putra, Riandy; Pratika, Remi Ayu; Beladona, Siti Unvaresi Misonia; Kumalasari, Meiyanti Ratna
Jurnal Abdimas Kartika Wijayakusuma Vol 5 No 2 (2024): Jurnal Abdimas Kartika Wijayakusuma
Publisher : LPPM Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jakw.v5i2.424

Laboratorium virtual memiliki peran krusial sebagai sarana yang dapat mendukung dan mengantisipasi keterbatasan yang mungkin terjadi dalam laboratorium fisik. Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan pemahaman dan keterampilan praktis siswa dalam pelajaran praktikum IPA, khususnya mata pelajaran kimia dengan menerapkan program virtual komputer Authoring Tool Chemcollective. Hal ini merupakan upaya alternatif untuk mengatasi kendala dalam menggunakan laboratorium di sekolah. Peserta pelatihan melibatkan siswa kelas XI-1 IPA dari SMA Negeri 4 Palangka Raya. Metode yang diterapkan dalam pelatihan mencakup demonstrasi, praktik langsung, dan pendampingan. Dampak positif dari kegiatan ini mencakup peningkatan pengetahuan dan keterampilan siswa terkait metode praktikum kimia berbasis Teknologi Informasi dan Komunikasi (TIK). Siswa menunjukkan kemahiran dalam mengaplikasikan simulasi yang ditawarkan, bahkan menunjukkan minat besar untuk mencoba virtual lab sains lainnya. Berdasarkan hasil pre-test, sekitar 12% (3 dari 25 siswa) mengalami proses pembelajaran kimia melalui penggunaan virtual lab. Namun, nilai post-test menunjukkan bahwa 88% siswa menyatakan pembelajaran kimia menjadi lebih mudah dipahami ketika menggunakan aplikasi virtual lab chemcollective. Pelatihan ini dianggap sangat bermanfaat karena membantu siswa mengatasi hambatan dalam memahami konsep-konsep IPA yang memerlukan praktikum, terutama mengingat keterbatasan alat dan bahan kimia di laboratorium konvensional.

Pemanfaatan Selulosa dari Limbah Popok Bayi Termodifikasi Asam Stearat sebagai Absorben Hidrofobik untuk Pemisahan Minyak dan Air Pramudita, Dimas; Yuneta, Yuneta; Wulandari, Oktavia Rahmi; Amalia, Tasya; Iqbal, Rendy Muhamad; Hidayat, Nurul; Damsyik, Akhmad; Putra, Riandy
Akta Kimia Indonesia Vol 9, No 2 (2024)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25493736.v9i2.22157

Peningkatan penggunaan popok bayi setiap tahun menyebabkan masalah limbah popok bayi yang tidak dapat terdegradasi secara alami. Limbah ini memiliki potensi untuk dimanfaatkan kembali menjadi material bernilai, seperti selulosa dalam Superabsorbent Polymer (SAP) yang dapat diubah menjadi material hidrofobik untuk mengatasi tumpahan minyak di perairan. Penelitian ini bertujuan untuk memodifikasi permukaan selulosa dari limbah popok bayi menggunakan asam stearat sebagai absorben hidrofobik, melalui tiga tahapan: preparasi, pemisahan selulosa, dan modifikasi dengan asam stearat dengan variasi 5, 6, dan 7 gram asam stearat (V1, V2, V3). Pemisahan selulosa dengan asam nitrat dan asam asetat menghasilkan rendemen sebesar 87%. Water Contact Angle (WCA) dari absorben termodifikasi asam stearat menunjukkan nilai 108,552°, 124,327°, dan 127,980° berturut-turut untuk V1, V2, dan V3, yang berarti material ini terkonfirmasi memiliki sifat hidrofobik. Absorben hidrofobik termodifikasi menunjukkan kapasitas penyerapan 3,129 g/g, 0,523 g/g, 0,329 g/g, dan 0,296 g/g untuk selulosa, V1, V2, dan V3, dengan efisiensi pemisahan masing-masing 0,43%, 0,38%, dan 0,37%, lebih rendah dibandingkan selulosa yang mencapai 1,63%. Namun, konsentrasi minyak yang terserap pada parameter uji oli mesin adalah 59,34%, 60,13%, dan 96,84%, jauh lebih tinggi dibandingkan selulosa yang hanya 7,39%. Variasi yang paling unggul berdasarkan nilai WCA dan konsentrasi minyak yang terserap adalah V3

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