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PENGARUH SUHU TERHADAP OKSIDASI FENOL MENGGUNAKAN MANGAN OKSIDA HASIL SINTESIS DARI MALTOSA DAN KMNO4 DENGAN METODE SOL-GEL - Hafizhah; Amir Awaluddin; - Muhdarina
Sistem Informasi Vol 6 No 01 (2015): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v6i01.475

Mangan oksida hasil sintesis menggunakan metode sol-gel dengan perbandingan prekursor KMnO4 dan maltosa (4: 1). Karakterisasi struktur mangan oksida menggunakan difraksi sinar-X untuk menentukan struktur, tingkat kristalinitas dan tingkat kemurnian, Scanning Electron Microscopy (SEM) untuk menentukan morfologi dan ukuran partikel, dan luas permukaan dengan metode metilen biru. Hasil menunjukkan bahwa mangan oksida hasil sintesis merupakan campuran mangan oksida berongga type cryptomelane dan hausmanite, adapun karakterisasi dengan SEM menunjukkan partikel mangan oksida berbentuk seperti gumpalan-gumpalan awan dengan ukuran partikel + 1 μm dan luas permukaan 10,716 m2/g. Penelitian ini bertujuan untuk mempelajari kemampuan mangan oksida sebagai katalis pada proses oksidasi fenol. Oksidasi fenol dilakukan pada variasi suhu reaksi (300C, 400C, 500C dan 600C) dan waktu reaksi (30, 60, 90, 120, 150 dan 180 menit). Hasil optimum menunjukkan bahwa katalis mangan oksida sebanyak 0,1 g dapat mengoksidasi fenol pada konsentrasi 100 ppm sebesar 92,7% pada suhu 600C di menit ke-150. Kajian kinetik menunjukkan bahwa oksidasi fenol mengikuti orde satu dengan energi aktivasi sebesar 2,19 kJ/mol.

DEGRADASI KATALITIK ZAT WARNA METIL JINGGA MENGGUNAKAN KATALIS OKSIDA MANGAN MANGANOSITE Mokhamad Subkhan; Amir Awaluddin; Presetya - -; Siti Saidah Siregar; Riska Anggraini
Sistem Informasi Vol 9 No 1 (2018): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v9i1.1080

Preparation of manganese oxide by sol-gel method and its application as a catalyst for methyl orange (MO) degradation was carried out using hydrogen peroxide as an oxidant.The characterization of manganese oxide was conducted using X-Ray Diffraction and Scanning Electron Microscope. The effect of initial concentration of MO was examined. Degradation efficiency was decrease with increasing the concentration of MO. The degradation kinetics ofMO followed the second-order reaction kinetics.

Strategic Development of School With Environmental Concepts A Case Study At KharismaBangsa Bilingual Boarding School And SMAN 8 Pekanbaru Hasan Yilmas; Zulfan Saam Auzar; Amir Awaluddin
INTERNATIONAL JOURNAL OF ECONOMICS, BUSINESS AND APPLICATIONS Vol 1, No 1 (2016)
Publisher : INTERNATIONAL JOURNAL OF ECONOMICS, BUSINESS AND APPLICATIONS

Environmental awareness is of an absolute requirement for effective environmental development efforts. Since it is closely related to the norms and ethics, environmental management by using educational path were a strategic position. Environmental education is specifically important because the world is recently experiencing imbalance (disequilibrium) state in term of environment. The present study aims at formulatingdevelopment strategies with environmental conceptson high school students. KharismaBangsa Bilingual Boarding School Tangerang and SMAN 8 Pekanbaru,which have obtained various achievements and appreciation in the environmental field, were taken as object of the study. ASWOT analysis were performed to both schools target for finding out the formulation strategy. The study suggested thatboth schools KharismaBangsa and SMAN 8 should implement an aggressive strategy, the strategy S-O (Quadrant I) which is, applied tohigh school students. It was found that the students’ awarenessincreased toward the environment whichaccordingly, were related to that support of parents, schools, and developed environmental activities with the community.

Pengaruh Variasi Temperatur Terhadap Kinetika Reaksi Solidifikasi Fly Ash Paving Blok Geopolimer Aman Aman; Amir Awaluddin; Adrianto Ahmad; Monita Olivia
Dinamika Lingkungan Indonesia Vol 5, No 2 (2018)
Publisher : Universitas Riau

This paper reported about the investigated of fly ash solidification with geopolymer process that studied temperature variation on the rate of solidification using Vicat Nidle apparatus and leaching tests on the content of heavy metals Cu, Pb, Cr and Cd in paving blocks after solidification. The transformation process of geopolymer crystalline formation was analyzed by Avrami’s kinetics theory (Avrami’s kinetica theory). From the results of the study obtained the optimum temperature of 80 oC, the highest rate of crystal growth solidification (K) value of 0.0475 and the Avrami exponent value (n) of 2.310 in this geopolymerization process shows a two-dimensional structure. From the results of leaching levels of heavy metals Cu, Pb, Cr and Cd in fly ash paving blocks are very small degraded in water and still below the environmental threshold.

PREPARASI NANOPARTIKEL OKSIDA BESI BERBASIS PASIR ALAM LOGAS DIDOPING KOBALT SEBAGAI MATERIAL LINGKUNGAN Erwin Amiruddin; Amir Awaluddin; Muhammad Rizki
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.293-300

The cobalt doped iron oxide nanoparticles have been prepared by ball milling method using Logas natural sand as a raw material. The milled iron oxide nanoparticles were doped using cobalt with concentration of 0, 5, 10, 15, and 20 wt.%. The structural, magnetic and optical properties were studied using X-ray diffractometer (XRD), vibration sample magnetometer (VSM), and UV-Vis spectroscopy, respectively. The samples show cobalt-hematite nanoparticles as indicated through XRD measurement. The XRD measurements confirmed the formation of crystalline, rhombohedral crystal structure and hematite nanoparticles. The average crystallite size calculated using Scherrer formula found to be 38.51, 35.67, 33.75, 32.73, and 31.53 nm after being doped with cobalt 0, 5, 10, 15, and 20 wt. %, respectively. The samples exhibited weak ferromagnetic behaviour with the coercivity ranged from 124 Oe to 299 Oe. The optical properties strongly depend on cobalt content and showed that the band gaps of cobalt doped hematite decrease with increasing cobalt content. This work suggests that the prepared iron oxide nanoparticles are attractive photo Fenton catalysts for the degradation of methylene blue in the water.

Metal-Free Activated Carbon Catalytic for Degradation of Organic Contaminants by Peroxydisulfate Activation Prawiranegara, Barata Aditya; Setia Utama, Panca; Amri, Amun; Nurhayati; Muhdarina; Awaluddin, Amir; Saputra, Edy
Journal of Applied Materials and Technology Vol. 5 No. 1 (2023): September 2023
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.5.1.20-26

Green chemistry has become trending recently, and the discovery of environmentally friendly catalysts is mandatory. Activated carbons (ACs) are one of the most environmentally friendly yet cheap materials that have the potential for catalyst application. Three commercially available ACs from Pancasari, Norit, and Chemical Supply were used as metal-free catalysts for advanced oxidation process (AOP) phenol removal in water in the presence of oxidants peroxydisulfate (PDS), and hydrogen peroxide (H2O2). It was found that ACs were effective to be used as catalysts for activating those oxidants to oxidize phenol in AOP reactions. In this study, the surface area of the catalyst significantly improved the phenol removal efficiency. ACs Pancasari (ACP) with the highest surface area has the best degradation performance of phenol removal with up to 99% removal efficiency in 60 minutes under the condition of [phenol] = 30 mg L-1, [ACP] = 0.2 g L-1, [PDS] = 3.3 mmol L-1, and T = 25oC. it was also found that the degradation process was significantly influenced by reaction temperature. Nevertheless, in this study, ACs display the potential as catalysts in the AOP process for wastewater treatments.

Bakteri Indigen Pendegradasi Hidrokarbon Minyak Bumi di Kabupaten Siak Provinsi Riau Riryn Novianty; Saryono; Awaluddin, Amir; Wahyu Pratiwi , Nova
Jurnal Teknik Kimia USU Vol. 9 No. 1 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v9i1.3834

The process of producing, refining and transporting petroleum can cause pollutants that are harmful to the environment and the living things that surround them. Indigenous microorganisms can be a solution to degrade hydrocarbons that are difficult to degrade. This study aims to isolate the indigenous bacteria from pollutant-contaminated soil and test its effectiveness in degrading hydrocarbons. The research began with soil sampling at the Joint Operating Agency of PT Siak Bumi Pusako-Pertamina Hulu Siak Regency, Riau Province with a purposive sampling method. The next step is the isolation of indigenous bacteria, testing the parameters of pH, Optical density (OD) and CO2 levels during the 16 incubation periods and determining the highest percentage of biodegradation. The results showed that Pseudomonas sp. with a code BTM2 (Bakteri Tanah Minyak 2) had the largest percentage (52.20%) after 16 days of incubation under optimum conditions to degrade the total hydrocarbon of petroleum. Pseudomonas sp. BTM2 is the most effective isolate to degrade hydrocarbons.

Strategic Development of School With Environmental Concepts A Case Study At KharismaBangsa Bilingual Boarding School And SMAN 8 Pekanbaru Yilmas, Hasan; Saam, Zulfan; Auzar, Auzar; Awaluddin, Amir
International Journal of Economic, Business & Applications Vol. 1 No. 1 (2016): International Journal of Economic, Business and Applications
Publisher : Program Pascasarjana, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ijeba.4

Environmental awareness is of an absolute requirement for effective environmental development efforts. Since it is closely related to the norms and ethics, environmental management by using educational path were a strategic position. Environmental education is specifically important because the world is recently experiencing imbalance (disequilibrium) state in term of environment. The present study aims at formulatingdevelopment strategies with environmental conceptson high school students. KharismaBangsa Bilingual Boarding School Tangerang and SMAN 8 Pekanbaru,which have obtained various achievements and appreciation in the environmental field, were taken as object of the study. ASWOT analysis were performed to both schools target for finding out the formulation strategy. The study suggested thatboth schools KharismaBangsa and SMAN 8 should implement an aggressive strategy, the strategy S-O (Quadrant I) which is, applied tohigh school students. It was found that the students’ awarenessincreased toward the environment whichaccordingly, were related to that support of parents, schools, and developed environmental activities with the community.

Bakteri Indigen Pendegradasi Hidrokarbon Minyak Bumi di Kabupaten Siak Provinsi Riau Riryn Novianty; Saryono; Awaluddin, Amir; Wahyu Pratiwi , Nova
Jurnal Teknik Kimia USU Vol. 9 No. 1 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The process of producing, refining and transporting petroleum can cause pollutants that are harmful to the environment and the living things that surround them. Indigenous microorganisms can be a solution to degrade hydrocarbons that are difficult to degrade. This study aims to isolate the indigenous bacteria from pollutant-contaminated soil and test its effectiveness in degrading hydrocarbons. The research began with soil sampling at the Joint Operating Agency of PT Siak Bumi Pusako-Pertamina Hulu Siak Regency, Riau Province with a purposive sampling method. The next step is the isolation of indigenous bacteria, testing the parameters of pH, Optical density (OD) and CO2 levels during the 16 incubation periods and determining the highest percentage of biodegradation. The results showed that Pseudomonas sp. with a code BTM2 (Bakteri Tanah Minyak 2) had the largest percentage (52.20%) after 16 days of incubation under optimum conditions to degrade the total hydrocarbon of petroleum. Pseudomonas sp. BTM2 is the most effective isolate to degrade hydrocarbons.

Preparation and characterization of Cr-TiO2/α-Fe2O3 nanocomposite for methylene blue degradation Hadilala, Teguh P; Amiruddin, Erwin; Awaluddin, Amir; Setiadi, Rahmondia Nanda
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.205-210

In this study, Cr-TiO2/α-Fe2O3 nanocomposite was prepared by the ball milling method, incorporating chromium, titanium dioxide (TiO2), and iron oxide (α-Fe2O3) nanoparticles extracted from Logas-Kuansing natural sand. The structural, magnetic, morphological, and optical properties of these nanocomposites were investigated using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), and UV-Vis spectroscopy. XRD revealed that both the pure and chromium-added nanocomposites have a hexagonal structure, with a crystalline size reduction from 17.5 nm to 19.7, 19.5, and 19.4 nm for the pure and chromium-added samples with chromium concentrations of 0, 5, 10, and 15 wt.%, respectively. Magnetic properties were analyzed through hysteresis loops using VSM, revealing coercivity, saturation magnetization, and remanence magnetization in the ranges of 131 – 247 Oe, 0.80 – 0.54 emu/g, and 0.097 – 0.116 emu/g, respectively. SEM analysis confirmed that the particle shape and size are within the nanometer scale. The optical band gap, estimated using the Tauc relation, decreased from 1.93 eV for the pure nanocomposite to 1.74, 1.68, and 1.72 eV for 5, 10, and 15 wt.% chromium-added nanocomposites, respectively. This study suggests that the prepared Cr-TiO2/α-Fe2O3 nanocomposite exhibits promising physical properties as a catalyst for the degradation of methylene blue.

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