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All Journal Jurnal Teknik Kimia USU Jurnal Dampak Griya Journal of Mathematics Education and Application Jurnal Teknik Kimia USU
Muhammad Turmuzi
Departemen Teknik Kimia, Fakultas Teknik, Universitas Sumatera Utara
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics

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Pengaruh Kecepatan Angin, Kelembapan dan Suhu Udara terhadap konsentrasi SO2 Ambien dan Pemetaan SO2 Amben di Sekitar PT. Kawasan Industri Medan Chandra Iramawati; Muhammad Turmuzi; Isra' Suryati; Lies Setyowati; Eka Lestari Mahyuni
Jurnal Dampak Vol 15, No 2 (2018)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.15.2.72-76.2018

Abstract

This study aims to determine the effect of wind speed, humidity and air temperature on the concentration of SO2 in ambient air around PT. Medan Industrial Area (KIM) and to find out the description of SO2 concentration mapping around KIM. This study was limited to KIM Phase I and II and sampling was carried out at 6 (six) points. The results obtained were the lowest SO2 concentration of 58.63 µg / m3 and the highest concentration was 112.91 µg / m3. Based on the linear regression test, the result is that the higher the wind speed, the concentration of SO2 in the area around KIM is lower and 15.1% SO2 concentration is influenced by wind speed. The higher the humidity of the air, the concentration of SO2 in the area around KIM is lower and 26% of the concentration of SO2 is influenced by humidity. The higher the air temperature, the higher the concentration of SO2 in the area around the KIM and 68.5% the concentration of SO2 is influenced by air temperature. Based on the results of mapping using the Surfer 11 version, the results obtained in the morning the highest SO2 concentration was in the southern part of KIM and the lowest SO2 concentration was in the northwestern part of KIM. During the day, the highest SO2 concentration was in the eastern part of the KIM and the lowest SO2 concentration was in the northwestern part of KIM.
PENGARUH SUHU DALAM PEMBUATAN KARBON AKTIF DARI KULIT SALAK (Salacca edulis) DENGAN IMPREGNASI ASAM FOSFAT (H3PO4) Muhammad Turmuzi, Arion Syaputra
Jurnal Teknik Kimia USU Vol 4, No 1 (2015)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (382.538 KB) | DOI: 10.32734/jutek.v4i1.9773

Abstract

This study was aimed to determine the yield, iodine and characteristics of activated carbon pore surface area. Activated carbon is made by impregnation method  with phosphoric acid (H3PO4). Snake fruit peel that has been mashed 1-2 mm soaked with phosphoric acid for (H3PO4) with concentration 10% for 3 hours. Filtered and dried for 24 hours at 60 °C. Snake fruit peel that has been impregnated pyrolysis at 400- 600 °C for 1  hours. Snake fruit peel that has been pyrolysis cooled in a desiccator for 30 minutes and washed until neutral pH. Then dried to a constant mass. The results showed that the best yield at a temperature of 400 °C 71.70%. The best surface area is 4078,694 m2/g. While iodine best is 494,91mg/g at a temperature 600 °C.
PENGARUH TEMPERATUR DALAM PEMBUATAN KARBON AKTIF DARI KULIT SALAK (SALACCA SUMATRANA) DENGAN AKTIFATOR SENG KLORIDA (ZnCl2) Muhammad Turmuzi, Ardiano Oktavianus Sahat Tua, Fatimah
Jurnal Teknik Kimia USU Vol 4, No 2 (2015)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (397.04 KB) | DOI: 10.32734/jutek.v4i2.10470

Abstract

Activated carbon can be made of organic or anorganic materials. Salak peel is a potential organic material as activated carbon. This research aimed to understand the effect of temperature in activated carbon with chemical activation ZnCl2 production from salak peel. The method included preparation of raw material, chemical activation, pyrolysis and iodine value test. The ratio of ZnCl2 is1:1 g/g, the activation time is 2 hours and the acivation temperature variation is 400, 450, 500, 550 and 600 oC. Results showed that the iodine value increased and yield decreased as the increasing of activation temperature. The highest iodine value and yield were achieved at 600°C and 400°C, the values were 694 mg/g and 30,93%.
PENGARUH SUHU DALAM PEMBUATAN KARBON AKTIF DARI KULIT SALAK (Salacca edulis) DENGAN IMPREGNASI ASAM FOSFAT (H3PO4) Muhammad Turmuzi; Arion Syaputra
Jurnal Teknik Kimia USU Vol. 4 No. 1 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.758 KB) | DOI: 10.32734/jtk.v4i1.1459

Abstract

This study was aimed to determine the yield, iodine and characteristics of activated carbon pore surface area. Activated carbon is made by impregnation method with phosphoric acid (H3PO4). Snake fruit peel that has been mashed 1-2 mm soaked with phosphoric acid for (H3PO4) with concentration 10% for 3 hours. Filtered and dried for 24 hours at 60 °C. Snake fruit peel that has been impregnated pyrolysis at 400- 600 °C for 1 hours. Snake fruit peel that has been pyrolysis cooled in a desiccator for 30 minutes and washed until neutral pH. Then dried to a constant mass. The results showed that the best yield at a temperature of 400 °C 71.70%. The best surface area is 4078,694 m2/g. While iodine best is 494,91mg/g at a temperature 600 °C.
PENGARUH TEMPERATUR DALAM PEMBUATAN KARBON AKTIF DARI KULIT SALAK (SALACCA SUMATRANA) DENGAN AKTIFATOR SENG KLORIDA (ZnCl2) Muhammad Turmuzi; Ardiano Oktavianus Sahat Tua; Fatimah
Jurnal Teknik Kimia USU Vol. 4 No. 2 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (397.04 KB) | DOI: 10.32734/jtk.v4i2.1472

Abstract

Activated carbon can be made of organic or anorganic materials. Salak peel is a potential organic material as activated carbon. This research aimed to understand the effect of temperature in activated carbon with chemical activation ZnCl2 production from salak peel. The method included preparation of raw material, chemical activation, pyrolysis and iodine value test. The ratio of ZnCl2 is1:1 g/g, the activation time is 2 hours and the acivation temperature variation is 400, 450, 500, 550 and 600 oC. Results showed that the iodine value increased and yield decreased as the increasing of activation temperature. The highest iodine value and yield were achieved at 600°C and 400°C, the values were 694 mg/g and 30,93%.
Studi Model Isoterm Adsorpsi Kristal Violet oleh Biosorben Kulit Ubi Kayu (Manihot esculenta) Ramadhan, Muhammad Dafin; Iriany; Misran, Erni; Turmuzi , Muhammad
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v10i1.5485

Abstract

Crystal violet is a dye that has many uses, but its waste can be harmful to humans and the environment. Adsorption is the most useful method for removing crystal violet waste compared to other separation methods because of its efficiency and viability. Cassava peel is a material that has potential to be an adsorbent. Cassava peel is suitable as an adsorbent because of its high cellulose, hemicellulose, and lignin content. In carrying out adsorption, getting the most appropriate isotherm model is important for predicting the adsorption parameters and the adsorbent system. This study aims to obtain an adsorption isotherm model that is the most suitable for the adsorption of crystal violet by cassava peel biosorbent with high accuracy and to obtain a combined model of the adsorption isotherm model that is the most suitable with the mass balance equation to predict removal efficiency. This research was conducted using secondary data using MATLAB as a supporting tool to perform a non-linear regression and Newton-Raphson iteration. In this research, we conclude that Sips model is the most suitable model with qms = 374,3 mg/g and 0,5933 site heterogeneity. For predict adsorbent mass ratio: adsorbate volume minimum ratio but removal efficiency stay at ≥ 90%, we obtain a correlation factor: m/V = -1.10-11Co4 + 2.10-8Co3 – 2.10-5Co2 + 0.015Co + 1.2686.
Studi Model Isoterm Adsorpsi Kristal Violet oleh Biosorben Kulit Ubi Kayu (Manihot esculenta) Ramadhan, Muhammad Dafin; Iriany; Misran, Erni; Turmuzi , Muhammad
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (233.421 KB) | DOI: 10.32734/jtk.v10i1.5485

Abstract

Crystal violet is a dye that has many uses, but its waste can be harmful to humans and the environment. Adsorption is the most useful method for removing crystal violet waste compared to other separation methods because of its efficiency and viability. Cassava peel is a material that has potential to be an adsorbent. Cassava peel is suitable as an adsorbent because of its high cellulose, hemicellulose, and lignin content. In carrying out adsorption, getting the most appropriate isotherm model is important for predicting the adsorption parameters and the adsorbent system. This study aims to obtain an adsorption isotherm model that is the most suitable for the adsorption of crystal violet by cassava peel biosorbent with high accuracy and to obtain a combined model of the adsorption isotherm model that is the most suitable with the mass balance equation to predict removal efficiency. This research was conducted using secondary data using MATLAB as a supporting tool to perform a non-linear regression and Newton-Raphson iteration. In this research, we conclude that Sips model is the most suitable model with qms = 374,3 mg/g and 0,5933 site heterogeneity. For predict adsorbent mass ratio: adsorbate volume minimum ratio but removal efficiency stay at ≥ 90%, we obtain a correlation factor: m/V = -1.10-11Co4 + 2.10-8Co3 – 2.10-5Co2 + 0.015Co + 1.2686.
Analisis Kemampuan Penalaran Matematis Siswa SMPN 4 Mataram Tahun Ajaran 2024/2025 Ditinjau Dari Gaya Belajar Nayaningtyas, Carmelita Kusuma; Turmuzi , Muhammad; Wahyu Triutami, Tabita
Griya Journal of Mathematics Education and Application Vol. 5 No. 3 (2025): September 2025
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v5i3.752

Abstract

This study aims to describe the mathematical reasoning abilities of eighth-grade students at SMPN 4 Mataram based on their learning styles: visual, auditory, and kinesthetic. The reasoning indicators include making conjectures, representing ideas, performing mathematical manipulations, determining problem-solving strategies, drawing conclusions, and verifying the correctness of statements. This research uses a qualitative descriptive method. From 48 students who completed the learning style questionnaire, six students were selected as research subjects two from each learning style using purposive sampling. Data were collected through learning style questionnaires, mathematical reasoning tests, and interview guidelines. Data analysis was carried out through data reduction, data display, and drawing conclusions. The results showed that students with visual and auditory learning styles were able to meet all indicators of mathematical reasoning and were categorized as having high reasoning ability. In contrast, students with a kinesthetic learning style met only some indicators and were categorized as having moderate ability. These findings indicate that mathematical reasoning skills can differ based on students' learning styles.
Co-Authors Ardiano Oktavianus Sahat Tua Arion Syaputra Chandra Iramawati Eka Lestari Mahyuni Fachry Wirathama, Syahrinal Anggi Daulay Halimatuddahliana Fatimah Fatimah Fatimah Fatimah Iriany Isra Suryati Lies Setyowati Misran, Erni Nayaningtyas, Carmelita Kusuma Orion Syaputra Ramadhan, Muhammad Dafin Wahyu Triutami, Tabita