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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Ilmu Dasar ELKHA : Jurnal Teknik Elektro Jurnal Teknik Sipil Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research REKAYASA JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Unistek: Jurnal Pendidikan dan Aplikasi Industri Stannum : Jurnal Sains dan Terapan Kimia Jurnal Teknologi Lingkungan Lahan Basah Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses
Syahrul Khairi
Jurusan Teknik Kimia Universitas Tanjungpura
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Other

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Selective Hydrogenation of Biomass-derived Furfural over Supported Ni3Sn2 Alloy: Role of Supports Rodiansono Rodiansono; Maria Dewi Astuti; Syahrul Khairi; Shogo Shimazu
Bulletin of Chemical Reaction Engineering & Catalysis 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.11.1.393.1-9

Abstract

A highly active and selective hydrogenation of biomass-derived furfural into furfuryl alcohol was achieved using supported single phase Ni3Sn2 alloy catalysts. Various supports such as active carbon (AC), g-Al2O3, Al(OH)3, ZnO, TiO2, ZrO2, MgO, Li-TN, and SiO2 have been employed in order to understand the role of the support on the formation of Ni3Sn2 alloy phase and its catalytic performance. Supported Ni3Sn2 alloy catalysts were synthesised via a simple hydrothermal treatment of the mixture of aqueous solution of nickel chloride hexahydrate and ethanol solution of tin(II) chloride dihydrate in presence of ethylene glycol at 423 K for 24 h followed by H2 treatment at 673 K for 1.5 h, then characterised by using ICP-AES, XRD, H2- and N2-adsorption. XRD profiles of samples showed that the Ni3Sn2 alloy phases are readily formed during hydrothermal processes and become clearly observed at 2θ = 43-44o after H2 treatment. The presence of Ni3Sn2 alloy species that dispersed on the supports is believed to play a key role in highly active and selective hydrogenation of biomass-derived furfural towards furfuryl alcohol. Ni3Sn2 on TiO2 and ZnO supports exhibited much lower reaction temperature to achieved >99% yield of furfuryl alcohol product compared with other supports. The effects of loading amount of Ni-Sn, reaction conditions (temperature and time profile) on the activity and selectivity towards the desired product are systematically discussed. 
Biogas Purification using Modified Red Mud Adsorbent with a Study of the Length of the Adsorbent Column Wivina Diah Ivontianti; Gayu Ika Putri; Rinjani Ratih Rakasiwi; Syahrul Khairi; Sri Rezeki; Aini Sulastri
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 1 (2024): March 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i1.70-79

Abstract

This study used red mud as an adsorbent for biogas purification. However, red mud had to undergo dealumination and calcination processes before being used as an adsorbent. Several acids, including 1 M HCl and 1M H2SO4, were employed in the red mud dealumination process, which was then analysed by XRF and GSA instruments. The results show that the best type of acid for the dealumination process was HCl with a Si/Al ratio, total pore volume, surface area and pore radius of 1.697; 67,081 m2/g; 0.1624 cm3/g; 48.4242 Å. The biogas purification process was carried out using red mud adsorbent dealuminated with HCl by varying the length of the adsorbent column, such as 10, 20 and 30 cm, and the contact time of 5, 10, 15 and 20 min. The optimum column length variation was 30 cm. The results obtained for this variation were a decrease in CO2 content of 292742.30 ppm with an efficiency of 19.08%. The increase in CH4 was 378232.69 ppm with a percentage increase of 240.28%.
Preparation and Characterization of Polysulfone/Celullose Acetate (PSF/CA) Blend Membrane Syahbanu, Intan; Piluharto, Bambang; Khairi, Syahrul; Sudarko, S.; Hermanto, Toto
Jurnal ILMU DASAR Vol 20 No 1 (2019)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (176.932 KB) | DOI: 10.19184/jid.v20i1.8684

Abstract

Blend polysulfone (PSF)/cellulose acetate (CA) membranes have prepared by phase inversion method. In here, CA was prepared from bacterial cellulose by acetylation reaction. Various temperature of coagulation bath were used as variable to investigated water uptake, water flux, porosity and thermal properties of membranes. As comparison, the CA commercial (CCA) was also investigated with the same parameters. As the result, the functional group analysis by FTIR show that CA has successfully prepared from bacterial cellulose. The parameters include water uptake, water flux and porosity have the similar trend. The parameters increase with increasing of temperature of coagulation bath. The other hand, CCA membrane have similar trend to CA membranes for parameter of water water uptake, water flux and porosity. However, CCA membrane is higher than CA membranes for all parameters. Thermal analysis by Differential Scanning (DSC) showed that all blend membranes with different temperature of coagulation bath have single transition glass temperature (Tg) that indicated that molecular homogeneity. Keywords: blend membrane, phase inversion, coagulation bath, water flux, porosity.
INTALASI SEL SURYA SKALA RUMAH TANGGA DI DESA PULAU LEMUKUTAN Usman A. Gani; Marcelina Marcelina; Ismail Yusuf; Kho Hie Khwee; Syahrul Khairi
JMM (Jurnal Masyarakat Mandiri) Vol 8, No 3 (2024): Juni
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v8i3.20151

Abstract

Abstrak: Pulau Lemukutan, yang terletak di Kalimantan Barat, merupakan tujuan wisata populer dan cagar alam laut yang didedikasikan untuk melestarikan ekosistem dan lingkungan. Namun, desa di pulau ini hanya memiliki akses listrik dari Perusahaan Listrik Negara (PLN) dalam waktu yang terbatas, yaitu dari pukul 6 pagi hingga 6 sore, yang menyebabkan pemadaman listrik yang mengganggu aktivitas sehari-hari warga. Untungnya, daerah ini menerima intensitas sinar matahari yang tinggi, yang membuatnya menjadi sumber energi alternatif yang potensial untuk kegiatan perumahan dan penerangan umum. Adanya program pengabdian masyarakat dilakukan di Desa Pulau Lemukutan, Kecamatan Sungai Raya, dengan tujuan untuk mengedukasi Green Energy kepada masyarakat dan meningkatkan pemahaman dan keterampilan mereka. Program ini diikuti oleh 20 peserta, sebagian besar laki-laki yang tinggal di RT 03 RW 01 Dusun Batu Barat. Pelatihan yang diberikan meliputi perancangan, pemasangan, pengoperasian, dan perawatan instalasi panel surya. Metode yang digunakan untuk menyampaikan program ini adalah sosialisasi dan pelatihan. Untuk mengevaluasi efektivitas program, digunakan kuesioner pre-test dan post-test. Hasilnya menunjukkan adanya peningkatan yang signifikan pada pemahaman peserta, dari rata-rata 53,5% menjadi 87,5%. Selain itu, pelatihan ini juga diaplikasikan secara praktis untuk memasang penerangan jalan bertenaga surya di Balai Rakyat Satu Atap.Abstract: In West Kalimantan, Lemukutan Island is a tourist destination and marine reserve that preserves the ecosystem and environment. However, the village only uses electricity from the State Electricity Company (PLN) from 6am to 6pm. This results in power cuts that disrupt residents' activities. However, this area has high sunlight intensity, so it has the potential to become an alternative energy source for residential activities and public lighting. Community service aims to educate the community in supporting Green Energy by increasing community understanding and skills. The activity was carried out in Pulau Lemukutan Village, Sungai Raya District and was attended by 20 participants, most of whom were men who lived in RT 03 RW 01 Batu Barat hamlet. The method used was socialisation and training such as design, installation, operation and maintenance of solar panel installations. Pre-test and post-test questionnaires were used to evaluate the effectiveness of the programme, and the results showed a significant increase in understanding from an average of 53.5% to 87.5%. Furthermore, the training was practically applied to install solar-powered street lighting in Balai Rakyat Satu Atap.
Synthesis of hydroxyapatite from hard clams shell (Meretrix spp.) using hydrothermal method as a dental implant coating biomaterials Zefania Riri; Patrinela Hilda; Lalak Tarbiyatun Nasyin Maleiva; Intan Syahbanu; Syahrul Khairi; Kiki Aristi
Jurnal Rekayasa Proses Vol 19 No 1 (2025): Volume 19, Number 1, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.18186

Abstract

Biomaterials that can be used as coatings on dental implants are hydroxyapatites. One of the natural substances used in the synthesis of hydroxyapatite is the ale-ale shell, which has a substantial calcium content of 93,444%. The hydroxyapatite synthetic was carried out using a hydrothermal method that uses the calcium precursor (Ca) of the ale-ale shell and phosphate precursors (P) derived from (NH4)2HPO4, as well as NH4OH as a pH regulator. This research uses the influence variables of CaO/(NH4)2HPO4 concentration (0.67; 1.67; and 2.67) and pH (11, 12, and 13). The results of the FTIR analysis showed that the typical absorption peaks of hydroxyapatites are , OH-, and group absorptions. XRD analysis results showed the formation of major HAp peaks that correspond to ICDD data 01-072- 1243, with the highest peaks in succession appearing at angles 31,74; 31,67; and 31,64°. The crystal size is 35,25; 123,39; and 55,81 nm with degrees of crystallinity in sequence of 87,28; 91,67; and 95,09° and has a hexagonal crystal shape. Hydroxyapatite synthesis with ale-ale shell waste raw materials by hydrothermal method gives the best results at a concentration of CaO/(NH4)2HPO4 2.67-pH 13.
Chitosan preparation from white shrimp shell (Litopenaeus vannamei) for Fe(III) removal from Pontianak municipal groundwater Khairi, Syahrul; Wijoyo, Raden Bayu Trisno; Radhiansyah, Lalu Yayan; Belanisa, Tivani; Rezeki, Sri
Stannum : Jurnal Sains dan Terapan Kimia Vol 7 No 1 (2025): April 2025
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v7i1.5566

Abstract

White shrimp shell (Litopenaeus vannamei) is one of the biomaterial sources to obtain chitin. Chitin could undergo deacetylation process through hydrolysis in strong base solution to produce chitosan. This research aims to determine the potential of chitosan as an environmentally friendly adsorbent for the treatment of groundwater containing high iron ions in Pontianak. The research was conducted in two main stages; obtaining chitosan from the chitin of white shrimp shells, and treating municipal groundwater sample that is high in iron ions content. To obtain chitosan, raw biomaterial chitin from white shrimp shell has been prepared by demineralisation and deproteination process and followed by the deacetylation. The deacetylation of chitin was carried out through hydrolysis reaction in three variation concentrations of aqueous NaOH (i.e 30%, 50%, and 70%-b/v). The measurement of deacetylation degree of chitosan was determined by acid-base titration method and FTIR method. The chitosan with the highest degree of deacetylation was obtained from 70%-b/v NaOH which were 87.4% and 69.0% by acid-base titration method and FTIR, respectively. The chitosan then was utilized in groundwater treatment. The results showed that the chitosan can be utilized as an adsorbent in the pre-treatment process of groundwater in reducing the iron ion content. Almost 40% iron ion were successfully immobilized when 2% (b/v) adsorbent was applied. These results lead to a sustainability of water resources in Pontianak so that city groundwater can be used as an alternative water source for the community.
PERFORMANCE ANALYSIS OF SMALL SCALE DESALINATION PLANT BASED ON MULTI TRAY AERATOR, MEDIA FILTER, AND SEAWATER REVERSE OSMOSIS Danial, Mochammmad Meddy; Purnaini, Rizki; Khairi, Syahrul; Setiawan, Eric; Nadeak, Raymond; Septiansyah, Edo; Abshar, Khairul
Jurnal Teknik Sipil Vol 22, No 2 (2022): JURNAL TEKNIK SIPIL EDISI DESEMBER 2022
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v22i2.58988

Abstract

Seawater as abundant source for clean water is deemed as impossible task, particularly in developing country. Therefore, the feasibility of applying the reverse osmosis technology, particularly in the coastal area for drinking water is need further investigation. This paper aims to design and analyze the performance of small-scale desalination plant using combination of multi tray aerator, media filter, and multiple membranes consisting of ultrafiltration, brackish, and seawater membranes.Parameters used to verify the performance of small plant are salinity and total dissolved solid for membranes, while the parameters for examining the pre-treatment are Fe and Mn. The test results will be evaluated under the regulation of minister of health, Permenkes No. 32/2017. The influence of the pump pressure on the flow will also be analyzed.The result shows that the desalination plant can reduce the salinity concentration significantly from 10,200 ppm to 16 ppm, or 99.84%. The ratio of clean water to rejected water is 36%.  However, bacteria of E. Coli are still found in clean water, which is probably caused by biofouling.
Study of Antioxidant Properties of Compounds from Kratom Leaves (Mitragyna speciosa) Using the Density Functional Theory (DFT) Method Arief, Ihsanul; Kurnianto, Erwan; Khairi, Syahrul
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 3 (2025): Edition September-December 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.03.7943

Abstract

At least 17 compounds in kratom leaves (Mitragyna speciosa) are responsible for several pharmacological activities, one of which is antioxidant. This study examines antioxidant activity based on thermodynamic aspects in the form of HOMO-LUMO energy values, and kinetics in the form of predictions of radical quenching mechanisms. All compounds were optimized for geometry, and thermodynamic parameters were determined in the form of energy gap values (ΔE), ionization potential (IP), electron affinity (EA), hardness (η), electronic chemical potential (µ), softness (S), and electrophilicity index (Ω). The compounds that showed the most superior potential were then predicted for their radical quenching mechanisms by determining the values of bond dissociation energy (BDE), ionization potential (IP), proton dissociation enthalpy (PDE), proton affinity (PA), and electron transfer enthalpy (ETE). The results of the analysis of thermodynamic properties showed that three compounds had the most potential values, namely speciociliatine, 7-hydroxy mitragynine, and mitraphylline. The study of the radical scavenging mechanism of the three compounds shows that the compounds had antioxidant activity through the hydrogen atom transfer (HAT) mechanism.
Co-Authors Abshar, Khairul Aini Sulastri Andreas Napitupulu Bambang Piluharto Belanisa, Tivani Danial, Mochammmad Meddy Desmaiani, Herda Eddy Kurniawan Erlindawati Erlindawati Fitria, Laili Gayu Ika Putri Hanggara Sudrajat Herman Siagian Hermanto, Toto Herudi Kandau Ihsanul Arief Intan Syahbanu Iqmal Tahir Ismail Yusuf Johan Sibarani Karna Wijaya Kho Hie Khwee Kiki Aristi Kurnianto, Erwan Lalak Tarbiyatun Nasyin Maleiva Marcelina Marcelina Marcelina Marcelina Marcelina Marcelina, Marcelina Maria Dewi Astuti Muhammad Rivai Nadeak, Raymond P Yolanda, Kristina Desideria Patrinela Hilda Pradika Wibowo Raden Bayu Trisno Wijoyo Radhiansyah, Lalu Yayan Rakasiwi, Rinjani Ria Devitasari Rizki Purnaini Rodiansono Rodiansono Septiansyah, Edo Setiawan, Eric Shogo Shimazu Sri Rezeki Sri Rezeki Sri Rezeki Sudarko, S. Syafrianto, M Khalid Syahbanu, Intan Triandi Kuseno Trisno Wijoyo, Raden Bayu Usman A. Gani Usman A. Gani Wibowo, Pradika Wijoyo, Raden Bayu Trisno Wivina Diah Ivontianti Wivina Diah Ivontianti, Wivina Diah Yoeswono Yoeswono Yusup Yusup Zaky Al-Fatony Zefania Riri