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All Journal International Journal of Advances in Applied Sciences Reaktor SPEKTRUM INDUSTRI Jurnal Bahan Alam Terbarukan CHEMICA Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan Jurnal Riset Kimia JURNAL KONVERSI Jurnal Pendidikan Dasar Jurnal Pengabdian Pada Masyarakat Sains Natural: Journal of Biology and Chemistry Jurnal Chemurgy CHEESA: Chemical Engineering Research Articles Jurnal Pengabdian Masyarakat Bumi Raflesia Yumary: Jurnal Pengabdian kepada Masyarakat J-MIND (Jurnal Manajemen Indonesia) Abdimas Indonesian Journal Pelita: Jurnal Pengabdian kepada Masyarakat Indonesian Journal of Chemical Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN
Maryudi Maryudi
Universitas Ahmad Dahlan
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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PENINGKATAN MOTIVASI DAN HASIL BELAJAR SISWA DALAM PEMBELAJARAN IPA MELALUI MEDIA KIT DI KELAS VI SEKOLAH DASAR Maryudi, Maryudi; Sugiatno, Sugiatno; Hamdan, Muhtar
Jurnal Pendidikan Dasar Vol 2, No 1 (2014): Juni 2014
Publisher : STKIP Melawi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (35.652 KB)

Abstract

Pengaruh Panjang Kolom Distilasi Bahan Isian Terhadap Hasil Produk Cair Sampah Plastik Azizah, Isti Nur; Sari, Ninda Puspita; Maryudi, Maryudi
CHEMICA: Jurnal Teknik Kimia Vol 2, No 1 (2015): Juni 2015
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (557.252 KB) | DOI: 10.26555/chemica.v2i1.4563

Abstract

Plastic waste is a problem that has to be taken seriously for the pollution of the environment, especially for land contamination. For now, the handling of plastic waste normally disposed (landfills), burned or recycled (recycle). At burning of plastic waste is usually carried out by pyrolysis method to produce plastic oil. To get the maximum results needed further analysis in the form of purification by distillation, where the distillation is a method that can be used for advanced analysis, one with a distillation column. Fractional distillation is often called the distillation column is to separate liquid components, two or more, of a solution based on differences in their boiling points. This distillation can also be used to mix with boiling point less than 20°C and work at atmospheric pressure or low pressure. Application of this type is used in the distillation of crude oil industry, to separate the components in the crude oil distillation Differences simple fractionation and distillation is the fractionation column. In this column warming occurs gradually with different temperatures on each license plate. Different heating is intended for refining distillates from the plates underneath. Getting to the top, the less volatile liquid. The distillation process depends on the characteristics of the vapor pressure of a liquid mixture of components.The distillate was obtained at temperature of 195oC, 200oC, 220oC, 235oC and 240oC and the most products component of pyrolysis plastic in previous research was obtain at 195oC, 200oC and 220oC
Karakteristik Torrefaksi dan Densifikasi Limbah Tandan Kosong Kelapa Sawit Maryudi, Maryudi
CHEMICA: Jurnal Teknik Kimia Vol 1, No 2 (2014): Desember 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (855.656 KB) | DOI: 10.26555/chemica.v1i2.3573

Abstract

Energy demand increases continuously due to the growth of industries. Most industries still rely on fossil fuel that its price commonly increases and the deposit in the universe decreases since it is not renewable resource. Indonesia is the largest palm oil producer in the world that has potential abundance biomass of empty fruit bunch (EFB) of oil palm. It can be alternative energy source. The EFB is commonly used as fuel for heat source of boiler jn the palm oil plant. Most applications were by conventional combustion process that has disadvantage of low energy value. The EFB was only chopped and grinded, and then dried prior to combustion process. This study investigates improvement of energy quality of EFB through torrefaction (or light pyrolysis) and densification process.  The EFB was chopped in the small size and grinded in the form of fiber, then dried. The EFB fiber in small slices was pressed in a small steel tube and heated in the range of 200-300°C. The variables of study were duration and temperature of process. The initial heat value of EFB was 18,241 MJ/kg that slightly lower than its of kernel shell heat value 19.955 MJ/kg. The water content were found 6.28% and 4.31% for EFB and kernel shell respectively.  Results have shown that torrefaction and densification have improved the calorific value of EFB in the range of 6.58-16.71% of its initial value.  On the other hand, the energy yield has decreased to 97.54, 97.26 and 93.76% of its initial energy yield for torrefaction temperature of 200, 250 and 300°C respectively
Conversion of Biomass of Bagasse to Syngas Through Downdraft Gasification Maryudi, Maryudi; Aktawan, Agus; Salamah, Siti
Jurnal Bahan Alam Terbarukan Vol 7, No 1 (2018): June 2018 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v7i1.11621

Abstract

National energy demand has been fulfilled by non-renewable energy sources, such as natural gas, petroleum, coal and so on. However, non-renewable energy reserves deplete increasingly which can cause an energy crisis. Conversion of biomass into energy becomes one of the solutions to overcome it. Indonesia has an enormous biomass potential especially from sugarcane plantation. Sugarcane plantations produce waste of bagasse abundantly. Commonly bagasse is utilized as energy source by conventional combustion.  This research studies the utilization of bagasse as energy source by gasification technology to produce gas fuel. The gasification model used in this research is downdraft gasifier equipped with cyclone to separate gas with solid or liquid gasification products. The result has shown  that gasification of bagasse has produced flammable syngas. The increase of bagasse weight increases the amount of syngas of gasification process. Carbon monoxide is the greatest content of syngas, while a few amount of H2, CH4 are also detected. Bagasse through gasification process is very potential source of alternative energy, since it is derived from waste and a cheap material.
Application of Natural Zeolite in Methylene Blue Wastewater Treatment Process by Adsorption Method Amelia, Shinta; Maryudi, Maryudi
Jurnal Bahan Alam Terbarukan Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v8i2.22480

Abstract

Textile industry waste contains dyes that are difficult to decompose naturally and cause disruption of ecosystems in water. The colorant that is often used in the textile industry is methylene blue which is a cationic heterocyclic aromatic compound. This compound is so stable that it is difficult to decompose naturally and is harmful to the environment in large concentrations. Therefore, we need a waste treatment technology that can reduce the concentration of dye waste in water. So far, the adsorption method remains the most efficient and effective technique in removing dyes because of its relatively large adsorption capacity. One method that can be used is the adsorption method using natural zeolite. Zeolite is one of the non-metal mineral commodities or multipurpose industrial minerals, one of which is as an adsorbent or adsorbent media. This study aims to determine the potential of natural zeolite in absorbing methylene blue with variations in the concentration of methylene blue and various sizes of natural zeolite mesh. The procedures in this experiment include, the preparation of natural zeolite with size variations of 20-60 mesh, 60-100 mesh and> 100 mesh and variations in the concentration of methylene blue used 15 ppm, 30 ppm and 45 ppm with contact time from 0 to 180 minutes. From the results of the study it was found that the smaller the size of natural zeolite used, the greater the percentage of dye removal that is at mesh size> 100 mesh the percentage of dye removal was 32.11%. As for the variation of the concentration of methylene blue, the smaller the concentration, the natural zeolite can work optimally ie at a concentration of 15 ppm at 180 minutes the remaining methylene blue concentration of 0.145 ppm.
Pengolahan Limbah Pewarna Metilen Biru Menggunakan Arang Aktif dan Zeolit Aktif dengan Katalis Fe dan Oksidator Hidrogen Peroksida Maryudi, Maryudi; Aktawan, Agus; Amelia, Shinta
Jurnal Riset Kimia Vol 12, No 2 (2021): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.414

Abstract

The textile industry including batik has provided broad benefits to society from an economic standpoint. However, there is negative impact from wastewater generated in the production process, which is containing dyes. Various types of dyes are used in the coloring process, and methylene blue is one of most used dye. Various ways have been done to treat wastewater containing methylene blue. Methylene blue processing techniques by adsorption have been carried out with various types of adsorbents. Research on the comparison of the ability of commercial activated charcoal and commercial activated zeolite to adsorb methylene blue was carried out with the addition of an Fe catalyst and a hydrogen peroxide oxidizer. The results showed that the addition of Fe catalyst would increase the degradation of methylene blue in the waste either with activated charcoal or activated zeolite. The combination of using Fe catalyst and hydrogen peroxide oxidizer further increases the removal of methylene blue in both types of adsorbents, activated charcoal and activated zeolite. Activated zeolite has the better ability to adsorb methylene blue than activated charcoal under various conditions.
PENGARUH PERSONALITY, BUDAYA ORGANISASI DAN KOMITMEN ORGANISASI TERHADAP ORGANIZATIONAL CITIZENSHIP BEHAVIOR SERTA DAMPAKNYA TERHADAP KINERJA GURU PADA SEKOLAH MENENGAH DI KECAMATAN INDRA MAKMUR KABUPATEN ACEH TIMUR Satria, Puji; Matriadi, Faisal; Maryudi, Maryudi
J-MIND (Jurnal Manajemen Indonesia) Vol 5, No 1 (2020): J-MIND Jurnal Managemen Indonesia
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.755 KB) | DOI: 10.29103/j-mind.v5i1.3425

Abstract

ABSTRACTThe purpose of this study was to determine and analyze the influence of personality, organizational culture and organizational commitment on organizational citizenship behavior and teacher performance in high schools in Indra Makmur District, North Aceh Regency. The number of samples in this study were 126 teachers obtained by saturated sample technique. The data analysis method used was Structural Equation Modeling (SEM) using AMOS 21 software. The results of this study found that directly, personality and organizational culture had a positive and significant effect on organizational citizenship behavior, while organizational culture has no significant effect. Furthermore, the results of the study found that personality and organizational citizenship behavior had a positive effect on teacher performance, but organizational culture had a negative effect and organizational commitment had no significant effect. The results of the mediation effect test found that organizational citizenship behavior is able to fully mediate the influence of organizational culture and personality on performance, but not to be a mediator on the effect of organizational commitment on theacher performance.Keywords      :    Personality, Organizational Culture, Organizational Commintment, Organizational Citizenship Behavior and Theacher Performance
The Capability of Mangrove Charcoal in Adsorption Process of Indigosol Substance in Wastewater of Batik Industry Maryudi, Maryudi; Salamah, Siti; Rahayu, Aster
Jurnal Bahan Alam Terbarukan Vol 10, No 2 (2021): December 2021 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v10i2.33351

Abstract

The development of the textile industry has had a positive impact on economic growth in Indonesia. Batik is one of the products of the textile industry that is proliferating in Indonesia. Dyes are the main ingredients in the textile and batik industrial process. One of the dyes used is indigosol, and about 15% of the total dyes used will result in industrial liquid waste. The presence of these dyes can damage the water and soil ecosystems. Liquid sewage treatment is needed to minimize the amount of contamination against groundwater and surface water. A standard method used in the handling of liquid waste is by adsorption process with various adsorbents. Commonly used adsorbents are silica gel, activated alumina, zeolite, polymer, and activated carbon. Activated charcoal from mangroves becomes an alternative to natural adsorbents with a large surface area. The ability of activated charcoal as an adsorbent was the focus of this study, both by the activation process by Fe cations and the addition of hydrogen peroxide activators. Characterization using a UV-Vis spectrophotometer is performed to see changes in indigosol concentration during the adsorption process. Results have shown that charcoal with Fe and H2O2 give a better performance on adsorption of indigosol than pure charcoal. Removal of indigosol by charcoal + Fe and H2O2 can reach 51%.
Pengolahan Limbah Pewarna Metilen Biru Menggunakan Arang Aktif dan Zeolit Aktif dengan Katalis Fe dan Oksidator Hidrogen Peroksida Maryudi Maryudi; Agus Aktawan; Shinta Amelia
Jurnal Riset Kimia Vol. 12 No. 2 (2021): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.414

Abstract

The textile industry including batik has provided broad benefits to society from an economic standpoint. However, there is negative impact from wastewater generated in the production process, which is containing dyes. Various types of dyes are used in the coloring process, and methylene blue is one of most used dye. Various ways have been done to treat wastewater containing methylene blue. Methylene blue processing techniques by adsorption have been carried out with various types of adsorbents. Research on the comparison of the ability of commercial activated charcoal and commercial activated zeolite to adsorb methylene blue was carried out with the addition of an Fe catalyst and a hydrogen peroxide oxidizer. The results showed that the addition of Fe catalyst would increase the degradation of methylene blue in the waste either with activated charcoal or activated zeolite. The combination of using Fe catalyst and hydrogen peroxide oxidizer further increases the removal of methylene blue in both types of adsorbents, activated charcoal and activated zeolite. Activated zeolite has the better ability to adsorb methylene blue than activated charcoal under various conditions.
Removal of Methylene Blue of Textile Industry Waste with Activated Carbon using Adsorption Method Maryudi Maryudi; Shinta Amelia; Siti Salamah
Reaktor Volume 19 No. 4 December 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (318.626 KB) | DOI: 10.14710/reaktor.19.4.168-171

Abstract

The colorant that is often used in the textile industry is methylene blue which is a cationic heterocyclic aromatic compound. This compound is very stable and is difficult to decompose naturally leading to environment in large concentrations. Therefore, a waste treatment technology to reduce the concentration of dye waste in water becomes importannt. So far, adsorption method with activated carbon remains the most efficient and effective technique in removing dyes from liquid waste due to its relatively large adsorption capacity. Activated carbon is one of the non-metallic mineral commodities or multipurpose industrial minerals, one of which is as an adsorbent or adsorbent media. This study aims to determine the potential of activated carbon in adsorbing methylene blue with variations in the concentration of methylene blue and particle size of activated carbon. The procedures in this experiment include, the preparation of activated carbon with size variations (20-60, 60-100 and> 100 mesh) and variations in the concentration of methylene blue (15 ppm, 30 ppm and 45 ppm) with contact time (0 to 180 minutes). From the results of the study, it was found that the smaller the size of activated carbon used, the greater the adsorption capacity, ie at mesh size> 100 mesh, the adsorption capacity was 9.8%. Whereas, the smaller the concentration of methylene blue, the activated carbon could work optimally at a concentration of 15 ppm at 30 minutes with adsorption capacity as high as 100%.Keywords: adsorption; Methylene Blue; activated carbon; concentration; time; particle size
Co-Authors Abdul Aziz Achmad Saidi Noor Adi Permadi Adi Permadi Adi Permadi, Adi Agus Aktawan, Agus Amelia, Shinta Amilia Amilia, Amilia Amillia, Amillia Anugrah, Nawang Anwaruddin Hisyam Anwaruddin Hisyam Arif Dwi Anto Azhar , Muh. Azizah, Isti Nur Baswara, Ahmad Raditya Cahya Candra, Syahrul Dwi Adi Chusna, Firda Mahira Alfiata Dewi, Kartika Tunggal Dhias Cahya Hakika Dimas, Doni Dwi Anto , Arif Erna Astuti Farah Fadillah Hanum Farrah Fadhillah Hanum Fatma Nuraisyah, Fatma Firdaus, Stradivary Maulida Hakim, Muhammad Arif Lukman Hanum, Farrah Fadhillah Hapsari, Intan Tri Hayuningtyas, Ratih Hendry Pangestu Hisyam, Anwaruddin Imam Santosa Irwan Mulyadi Ismanto, Deny Isti Nur Azizah Kurniawan, Lutfi Loundi Vidinda , Oktaza Lukhi Mulia Shitophyta Lutfi Firmansyah, Lutfi Matriadi, Faisal Mohammed, Hamad Khudhair Mufti Khakim, Mufti Muhammad Hakiim Marzun Muhammad Kresna Islami Muhtar Hamdan, Muhtar Munawaroh, Annisa Luthfiana Nafira Alfi Zaini Amrillah Nazzal, Sami Ninda Puspita Sari Novia Rahmawati Nur Halimah Nuraini Nuraini Oktaza Loundi Vidinda Padya, Syaeful Akbar Pratiwi, Margaretha Herlin Rahayu, Aster Rahman, Zulfan Hanif Ramadani, Noorpani Ramadhan, Muhammad Kaisar Sutomo Refah Syauqi Sari, Ninda Puspita Satria, Puji Selang, Sartika S. Sembiring, Nisya Silvani Shinta Amelia Shitopyta, Lukhi Mulia Sinaga, Alexander Maruli Tua Siti Jamilatun Siti Salamah Siti Salamah Siti Salamah Siwi Purwanti Soedjatmiko Sofiana, Nurani Sofyan Hadi Sriyana, Ida Sugiatno Sugiatno Suhendra Suhendra Suradi, Siti Samahani Totok Eka Suharto Veranica Veranica, Veranica W, Mila Utami Wardana, Mikael Dia Widyaningrum, Sri Rahayu Yahya, Asdarina Zahrul Mufrodi, Zahrul Zufar, Ahmad Fatwa