ORCID Profile
0000-0001-6430-9072
Current Organisation
Universitas Riau
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Publisher: American Chemical Society (ACS)
Date: 15-11-2012
DOI: 10.1021/IE301639T
Publisher: Springer Science and Business Media LLC
Date: 05-01-2023
Publisher: Universitas Padjadjaran
Date: 15-04-2020
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 06-2020
Publisher: Elsevier BV
Date: 09-2012
Publisher: Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau
Date: 10-05-2020
Abstract: Dyes substances from the textile industry wastewater are internationally classified as poisonous substances, and they cause a severe threat to humans being and other living things, even at low concentrations. Therefore, this waste has to be treated before discharge to the environment. One of the most effective processes for degrading dyes is photocatalytic oxidation. Two different pretreatments of Spent bleaching earth (SBE) from palm oil refinery plant were applied to produce catalyst supports. The SBEe support was prepared by extraction using n-hexane, SBEc by calcination at 500 oC, and then used as a support for CeFeO3/SBEe and CeFeO3/SBEc perovskite catalyst. Both catalysts were tested for the degradation of methylene blue (MB) using photocatalytic oxidation. The properties of catalysts were characterized using some characterization methods, such as thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscope (SEM) equipped with Dispersive Energy X-ray Spectroscopy (EDS), specific surface area (BET) and pore size analysis. CeFeO3/SBEe catalyst was found more efficient in photocatalytic oxidation for MB compared with the CeFeO3/SBEc catalyst. CeFeO3/SBEe catalyst could degrade 99.5% of MB during 120 min, at the condition of 25 mg/L MB, 1.0 g/L catalyst, and pH 7. The effect of pH on the performance of the catalyst followed the order of pH 7 pH 9 pH 5. Moreover, the CeFeO3/SBEe catalyst demonstrated excellent activity in the degradation of MB, displaying that CeFeO3/SBEe is a favorable catalyst for water purification.
Publisher: Springer Science and Business Media LLC
Date: 20-11-2013
Publisher: MDPI AG
Date: 03-07-2022
DOI: 10.3390/W14132124
Abstract: Water-soluble organic pollutants, such as phenolic compounds, have been exposed to environments globally. They have a significant impact on groundwater and surface water quality. In this work, different Mn3O4 catalysts were prepared for metal oxide activation of peroxymonosulfate (PMS) to remove the phenolic compound from the water environment. The as-prepared catalysts were characterized using thermogravimetric-differential thermal analysis (TG-DTA), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) surface area analysis. Furthermore, the effect of temperature and reusability of the as-prepared Mn3O4 catalysts is also investigated. The Mn3O4 nanoparticles (NPs) catalyst reveals an excellent performance for activating PMS to remove phenol compounds. Mn3O4 NPs exhibits 96.057% efficiency in removing 25 ppm within 60 min. The kinetic analysis shows that Mn3O4 NPs fitted into pseudo-first order kinetic model and exhibited relatively low energy activation of 42.6 kJ/mol. The reusability test of Mn3O4 NPs displays exceptional stability with 84.29% efficiency after three-sequential cycles. The as-prepared Mn3O4 NPs is proven suitable for phenolic remediation in aqueous solutions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2RA20346D
Publisher: Elsevier BV
Date: 10-2013
Publisher: Elsevier BV
Date: 05-2023
Publisher: Elsevier BV
Date: 07-2014
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA42455C
Publisher: Springer Science and Business Media LLC
Date: 03-02-2022
Publisher: Elsevier BV
Date: 09-0010
DOI: 10.1016/J.JCIS.2013.06.061
Abstract: Spinel structured Mn3O4, Co3O4 and Fe3O4 nanoparticles were prepared, characterized, and tested in degradation of aqueous phenol in the presence of peroxymonosulfate. It was found that Mn3O4 and Co3O4 nanoparticles are highly effective in heterogeneous activation of peroxymonosulfate to produce sulfate radicals for phenol degradation. The activity shows an order of Mn3O4>Co3O4>Fe3O4. Mn3O4 could fast and completely remove phenol in about 20 min, at the conditions of 25 ppm phenol, 0.4 g/L catalyst, 2 g/L oxone®, and 25 °C. A pseudo first order model would fit to phenol degradation kinetics and activation energies on Mn3O4 and Co3O4 were obtained as 38.5 and 66.2 kJ/mol, respectively. In addition, Mn3O4 exhibited excellent catalytic stability in several runs, demonstrating that Mn3O4 is a promising catalyst alternative to toxic Co3O4 for water treatment.
Publisher: Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau
Date: 25-08-2018
Abstract: Chitosan-Silica blended membranes were an attractive choice for the purification process because their porous size and morphology provide higher selectivity. In this study, the synthesis and characterization of chitosan-silica membranes were carried out with a mass variation of Poly Ethylene Glycol (PEG): 0,5 2,5 5 grams, Poly Vinyl Alcohol (PVA): 1, 2, 3 grams and pressure 1, 2, 3 bars for the hotel wastewater treatment. The purpose of this study was to determine the characterization of chitosan-silica membranes obtained by SEM and tensile strength, and to determine the performance of membrane against the flux and rejection test with the effect of a mixture of PEG and PVA mass using raw materials in form of chitosan-silica. Tensile strength analysis showed that membrane with the highest tensile strength was 19,14 Mpa for PEG and 13,7 Mpa for PVA. The SEM test results showed a relatively small pore size of PEG 0,5 gram (0,061 ?m) and PVA 2 grams (0,0284 ?m). Flux and rejection results showed that membrane with 2,5 grams composition of PEG was the most effective in performance with the flux 18,19 L/m2.h and rejection elimination of BOD (50,76%), COD (46,09%) and TSS (48,00%). On the other hand, flux results showed that membrane with 3 grams composition of PVA was the most effective with the flux 20,13 L/m2.h and rejection elimination of BOD (62,84%), COD (64,73%) and TSS (38,40%). The characteristics of permeability, selectivity, and membrane pore statistics show that the silica membrane is an ultrafiltration membrane.
Publisher: Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau
Date: 12-11-2020
Abstract: The LaMnO3 perovskite catalyst was successfully synthesized using a simple solid-state reaction method. This catalyst is used to activate PMS in the organic content's degradation process in the secondary effluent palm oil mill (POMSE). The organic content in POMSE is equivalent to the COD value thus the COD value is used as a parameter for the process's success. The catalyst performance test shows that the catalyst effectively reduces COD, and the waste meets the maximum threshold allowed by government regulations. The variables that affect the catalyst's effectiveness were the calcination temperature of the catalyst, catalyst loading, PMS concentration, and temperature. The temperature of calcination affects the perovskite crystal formation the higher the temperature, the more active catalyst obtained. The catalyst loading and PMS concentration variables affect the degradation process of organic levels in POMSE at low levels, the higher the catalyst loading and PMS concentrations will increase the effectiveness of the degradation process, but at certain levels, the addition of catalysts and PMS reduces the effectiveness of the process. LaMnO3-800oC catalyst presents the highest activity of 92.7% and met the allowable threshold of COD 300 mg/L. The sequence for removal of COD among the three catalysts with an order of LaMnO3-800oC LaMnO3-700oC LaMnO3-600 oC. The pseudo-second-order kinetics equation fits the experimental data. The effect of temperature on the kinetics constant follows the Arrhenius equation. Furthermore, the catalyst obtained was stable, with no significant decrease in catalysts activity up to three runs.
Publisher: Universitas Muhammadiyah Palangkaraya
Date: 28-11-2022
DOI: 10.33084/PENGABDIANMU.V7I6.3991
Abstract: Mutiara Ayu is a Micro, Small, and Medium Enterprise (MSME) which was founded by a group of housewives in Mutiara Kualu 8 Housing, Kualu Village, Tambang District, K ar Regency, which produces Healthy Soybean Extract. Since its establishment in November 2020, MSME Mutiara Ayu has been experiencing various problems in running its business. The University of Riau Abdimas team, in partnership with MSME Mutiara Ayu, provided assistance to solve the problems being faced in the form of increasing knowledge and skills to improve product quality and quantity. The community partnership scheme service program was carried out for two months, namely July – August 2022, involving Real Work Lecture (Kukerta) students. This program was carried out in several stages of implementation, namely: (1) The preparation stage includes coordination with partner MSMEs, analysis of business conditions, recruitment, briefing with the community service team and students, coordination with various related parties, identification of needs, and analysis of instruments, (2) The implementation phase includes the provision of instruments and training, technical guidance, and assistance. (3) The monitoring and evaluation phase includes coordination with partner MSMEs, village parties, and Kukerta students. The results achieved in the Kukerta-integrated Abdimas program are an increase in product quality and quantity as well as an increase in the knowledge and skills of MSME Partners related to production and business management, which is expected to increase Mutiara Ayu's MSME income in the future.
Publisher: Trans Tech Publications, Ltd.
Date: 08-2015
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.803.110
Abstract: Geopolymer is an inorganic polymer from activation of source materials that rich of silica and alumina with alkaline activator. Previous studies reveal that the geopolymer has engineering properties and durability, which is equivalent or higher than the Ordinary Portland Cement (OPC) concrete. This paper presents properties of geopolymer concrete prepared with local Palm Oil Fuel Ash (POFA) and Fly Ash (FA) from agro-industrial waste in Riau Province, Indonesia. The POFA and FA were activated by a combination of sodium hydroxide and sodium silicate. The specimens were cured at room temperature for 24 hours before steam cured for another 24 hours at 60 O C. Hardened properties namely compressive strength, tensile strength, flexural strength and modulus of elasticity, and water penetration of both POFA and FA geopolymer concrete were determined at 7, 14 and 28 days. Results showed that local POFA and FA as geopolymer source materials could produce mix with strength 19-22.5 MPa at 28 days. The compressive strength, tensile strength, flexural strength and modulus of elasticity of both geopolymer tended to increase slightly with time. In general, the results suggest that the local POFA and FA are potential as source material to produce geopolymer concrete.
Publisher: Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau
Date: 17-01-2019
DOI: 10.31258/RAJE.1.2.9
Abstract: Cooking oil that has been used more than once is not good for health due to exposure to carcinogens. Waste cooking oil causes pollution to the environment. Waste cooking oil can be used as a raw material for making liquid soap. The objective of this activity was to introduce the knowledge and train Batu Basurat community in making dishwashing-liquid soap from waste cooking oil. The method consists of location survey, training preparation, interactive training, monitoring, and evaluation. Dishwashing-liquid soap was made by mixing preheated waste cooking oil and potassium hydroxide (KOH) at 60-70 °C for one hour until trace was formed. Then, the mixture was kept agitated every 15 minutes for 2-3 hours until it becomes more solidified and transparent. Liquid soap was made by dissolving in warm water and addition of lemon essence as a deodorizer. Batu Basurat villagers showed a great interest in the activity, showing by enthusiasm and involvement in the training. Evaluation results showed that 100% community understood on making homemade dishwashing-liquid soap and 90% community agreed that liquid soap from waste cooking oil has a commercial potential, which could increase entrepreneurship ability and economic growth of Batu Bersurat villagers.
Publisher: American Chemical Society (ACS)
Date: 22-05-2013
DOI: 10.1021/ES400878C
Abstract: Three one-dimensional MnO2 nanoparticles with different crystallographic phases, α-, β-, and γ-MnO2, were synthesized, characterized, and tested in heterogeneous activation of Oxone for phenol degradation in aqueous solution. The α-, β-, and γ-MnO2 nanostructured materials presented in morphologies of nanowires, nanorods, and nanofibers, respectively. They showed varying activities in activation of Oxone to generate sulfate radicals for phenol degradation depending on surface area and crystalline structure. α-MnO2 nanowires exhibited the highest activity and could degrade phenol in 60 min at phenol concentrations ranging in 25-100 mg/L. It was found that phenol degradation on α-MnO2 followed first order kinetics with an activation energy of 21.9 kJ/mol. The operational parameters, such as MnO2 and Oxone loading, phenol concentration and temperature, were found to influence phenol degradation efficiency. It was also found that α-MnO2 exhibited high stability in recycled tests without losing activity, demonstrating itself to be a superior heterogeneous catalyst to the toxic Co3O4 and Co(2+).
Publisher: Springer Science and Business Media LLC
Date: 03-02-2022
Publisher: Elsevier BV
Date: 09-2012
Publisher: Elsevier BV
Date: 10-2023
Publisher: MDPI AG
Date: 02-2020
Abstract: In this work, calcium oxide (CaO) extracted from eggshell impregnated with magnetite (Fe3O4) is prepared successfully and it had been applied on transesterification of palm oil off-grade. Prior experiment, the eggshells material are powdered and calcined at 900 °C then impregnated with Fe3O4 and recalcined. The obtained Fe3O4/CaO catalyst is characterized using X-ray diffraction and Braunaeur–Emmet–Teller (BET) surface area. The influence of various parameters including recalcined time and temperature are investigated. The prepared catalyst is tested for transesterification of palm oil off-grade to produce biodiesel in which the optimal conditions of a methanol alm oil off-grade molar ratio of 10:1, the catalyst weight of 6%, the reaction temperature of 70 °C, and the reaction time of 2 h. The transesterification product was analyzed using GC-MS, which showed the biodiesel yield of 90% at the recalcined temperature of 600 °C and reaction time of 2 h. It has been noted that the catalyst activity is achieved when the moderate recalcination temperature is applied and the disordered structure of the catalyst is maintained. This study also confirms that CaO impregnated with Fe3O4 could be a solid catalyst for the biodiesel synthesis through transesterification reaction of palm oil off-grade.
Publisher: Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau
Date: 31-01-2023
Abstract: Geopolymer hybrid concrete is prepared by activating fly ash bottom ash with an alkaline solution and curing with Ordinary Portland Cement (OPC). OPC could be added to the mixture to increase the reaction, promote hydration, and assist in curing at room temperature. Peat water is an acidic organic environment that may reduce the durability of concrete. The purpose of this research is to determine the effect of Portland cement on the properties of FABA geopolymer hybrid concrete exposed to peat water. Portland cement was used in geopolymer as an additive and a substitute. Compressive strength, porosity, and weight change were evaluated for both mixtures. The NaOH molarities were 10, 12, and 14M, the NaOH/sodium silicate ratios were 1.5, 2.0, and 2.5, and the Ordinary Portland Cement percentages were 0, 10, and 15%. Specimens were exposed to peat water for up to 91 days following 28 days of room temperature curing. The geopolymer mixture with 10M NaOH, 2.5M Ms, and 15% OPC had the highest compressive strength and the lowest porosity. The FABA geopolymer hybrid with OPC had a slightly greater compressive strength and a lower porosity than the geopolymer containing OPC as a cement replacement material. In addition, weight change is more stable in geopolymers containing OPC. Based on the performance of both mixes in peat water, it is recommended to use OPC as an additive in FABA geopolymer hybrid concrete.
Publisher: Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau
Date: 11-10-2019
DOI: 10.31258/UNRICSCE.1.506-510
Abstract: Limbah dari pertanian dan peternakan pada kawasan yang masyarakatnya bermata pencaharian sebagai petani ataupun peternak akan menimbulkan permasalahan lingkungan jika dibiarkan terus menerus tanpa adanya pengolahan terhadap limbah tersebut. Salah satu metode pengolahan limbah agro industri adalah pupuk organik. Pupuk organik adalah pupuk yang diproduksi dari materi makluk hidup seperti pelapukan sisa-sisa tanaman, hewan dan manusia. Pupuk organik ini dapat beruapa padatan dan cairan. Kandungan yang terdapat pada pupuk ini lebih kepada bahan organik dari pada kadar haranya. Penggunaan pupuk organik ini dapat meningkatkan perkembangan tumbuhan dan dapat mengurangi efek s ing dari pupuk berbahan baku kimia yang lebih mahal. Pupuk organik dapat dibuat secara mandiri dan berkelompok dan lebih ramah lingkungan dan ekonomis dibandingkan pupuk sintetis. Tujuan kegiatan ini adalah untuk melatih keter ilan masyarakat pedesaan untuk membuat pupuk organik dengan menggunakan limbah agro industri mereka secara mandiri. Pengabdian dilaksanakan di Kecamatan Rambah Hilir Desa Pasir Utama Kabupaten Rokan Hulu Provinsi Riau. Proses pembuatan pupuk organik adalah dengan menc ur kotoran sapi dan cacahan jerami padi kemudian disiram dengan EM4 yang sudah diaktifkan dengan larutan air gula merah. C uran ini kemudian didiamkan selama 4 minggu dan setiap 3 hari diaerasi agar proses fermentasinya berjalan baik. Metode yang digunakan dalam kegiatan adalah mengadakan pelatihan dan penyuluhan mengenai Teknologi pembuatan pupuk organik dari limbah agro industri masyarakat Desa Pasir Utama. Kegiatan ini juga mendukung program pemerintah untuk mendorong pertumbuhan pemanfaatan kembali limbah agro yang akan meningkatkan produktifitas pertanian masyarakat pedesaan.
No related grants have been discovered for edy saputra.