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All Journal Jurnal Dampak Journal of Science and Applicative Technology Bulletin of Chemical Reaction Engineering & Catalysis
Nugraha, Ashari Budi
Kelompok Keahlian Teknik Fisika, Fakultas Teknologi Industri, Institut Teknologi Bandung
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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Isolasi Nanoselulosa Terkarboksilasi dari Limbah Kulit Pisang Ambon Lumut dengan Metode Oksidasi Ashari Budi Nugraha; Ahmad Nuruddin; Bambang Sunendar
Journal of Science and Applicative Technology Vol 5 No 1 (2021): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i1.413

Abstract

In this study, banana peel from ambon lumut (Musa acuminata) was used as source for nanocellulose fibers. Carboxylated nanocellulose was isolated with oxidation method using ammonium persulfate (APS). In order to investigate the effect of temperature towards the characteristics of nonocellulose, temperature for oxidation process was set at three different values: 60 °C, 70 °C, dan 80 °C. Nanostructure of cellulose was observed as a mix of fibers and whiskers from transmission electron microscopy (TEM) images. The diameter of nanocellulose is ranging from 12,1 to 25,1 nm. Data from spectrometry graphs (FTIR) confirms the existence of carboxyl functional groups in nanocellulose samples. X-ray diffraction pattern (XRD) shows that crystallinity index values increase as temperature of oxidation process increases. The highest crytallinity index value of 72,4% was obtained from nanocellulose treated with oxidation temperature of 80 °C. This analysis shows banana peel waste as a potential alternative source for carboxylated nanocellulose.
Synthesis of Spherical Nanostructured g-Al2O3 Particles using Cetyltrimethylammonium Bromide (CTAB) Reverse Micelle Templating Didi Prasetyo Benu; Veinardi Suendo; Rino Rakhmata Mukti; Erna Febriyanti; Fry Voni Steky; Damar Rastri Adhika; Viny Veronika Tanuwijaya; Ashari Budi Nugraha
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.3.3855.542-550

Abstract

We demonstrated the synthesis of spherical nanostructured g-Al2O3 using reverse micelle templating to enhance the surface area and reactant accessibility. Three different surfactants were used in this study: benzalkonium chloride (BZK), sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB). We obtained spherical nanostructured particles only using CTAB that form a reverse micelle emulsion. The particles have wide size distribution with an average size of 2.54 mm. The spherical particles consist of nanoplate crystallites with size 20-40 nm randomly arranged forming intercrystallite spaces. The crystalline phase of as-synthesized and calcined particles was boehmite and g-Al2O3, respectively as determined by XRD analysis. Here, the preserved particle morphology during boehmite to g-Al2O3 transformation opens a facile route to synthesize g-Al2O3 particles with complex morphology. The specific surface area of synthesized particles is 201 m2/g, which is around five times higher than the conventional g-Al2O3 (Aldrich 544833). Spherical nanostructured g-Al2O3 provides wide potential applications in catalysis due to its high density closed packed structure, large surface area, and high accessibility. 
bcl Morphology Formation Strategy on Nanostructured Titania via Alkaline Hydrothermal Treatment Fry Voni Steky; Veinardi Suendo; Rino Rakhmata Mukti; Didi Prasetyo Benu; Muhammad Reza; Damar Rastri Adhika; Viny Veronika Tanuwijaya; Ashari Budi Nugraha
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.3.3853.513-520

Abstract

Titanium dioxide (TiO2) is a semiconductor material that plays an important role in photocatalysis. Bicontinuous concentric lamellar (bcl) is an interesting morphology with an open channel pore structure that has been successfully synthesized on silica-based materials. If bcl morphology can be applied in TiO2 system, then many surface properties of TiO2 can be enhanced, i.e. photocatalytic activity. A simple and effective strategy has been demonstrated to transform aggregated and spherical TiO2 particles to bcl morphology via alkaline hydrothermal route. Alkaline hydrothermal treatment successfully transforms TiO2 particle surface to have bcl morphology through swelling with ammonia then followed by phase segregation process. We proposed this strategy as a general pathway to transform the particle surface with any shape to have bcl morphology. 
Studi Pengolahan Air Limbah Batik pada Skala Industri Rumah Tangga dan Usaha Kecil Menengah di Cirebon, Indonesia Diyah, Nazuwatussya’; Ratuannisa, Tyar; Ekawati, Estiyanti; Yulia, Elfi; Purwasasmita, Bambang Sunendar; Nugraha, Ashari Budi
Dampak Vol 20, No 1 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.20.1.8-15.2023

Abstract

Since the admission of batik as a world cultural heritage by the United Nations Educational, Scientific and Cultural Organization, the public interest in batik and the batik industry has been increasing. However, the problem arises when the development of the batik industry is not accompanied by batik wastewater treatment that fits the wastewater quality standard. Hence it causes environmental pollution, especially for the aquatic body. This paper discusses the conditions and awareness for batik wastewater treatment in the batik industry on household and small-to-medium scales in Plered District, Cirebon, Indonesia. It examines the pollutant load of batik wastewater in the area, the respondent's knowledge about wastewater processing systems, wastewater impact on the environment, and the need for education about batik wastewater treatment plants (WWTPs). The examination of wastewater samples showed that batik wastewater did not meet the waste quality standards and potentially harmed the environment. The respondents generally use synthetic dyes, and were unaware of its impact on the surrounding environment. Keyword: batik, WWTPs, batik production process, dye, wastewater impact  ABSTRAK Sejak ditetapkannya batik sebagai warisan budaya dunia oleh United Nations Educational, Scientific and Cultural Organization, minat masyarakat terhadap batik dan industri batik semakin meningkat. Namun permasalahan muncul ketika pengembangan industri batik tidak dibarengi dengan pengolahan air limbah batik yang sesuai dengan baku mutu air limbah. Oleh karena itu menyebabkan pencemaran lingkungan, terutama untuk badan air. Tulisan ini membahas tentang kondisi dan kesadaran pengolahan air limbah batik pada industri batik skala rumah tangga dan kecil-menengah di Kecamatan Plered, Cirebon, Indonesia. Kajian ini mengkaji beban polutan air limbah batik di wilayah tersebut, pengetahuan responden tentang sistem pengolahan air limbah, dampak air limbah terhadap lingkungan, dan perlunya penyuluhan tentang Instalasi Pengolahan Air Limbah (IPAL) batik. Pemeriksaan sampel air limbah menunjukkan bahwa air limbah batik tidak memenuhi baku mutu limbah dan berpotensi merusak lingkungan. Responden umumnya menggunakan pewarna sintetis, dan tidak mengetahui dampaknya terhadap lingkungan sekitar. Kata kunci: COD, elektrokoagulasi, elektroda aluminium, air limbah tahu, monopolar.      
Co-Authors Ahmad Nuruddin Bambang Sunendar P Benu, Didi Prasetyo Damar Rastri Adhika Diyah, Nazuwatussya’ Ekawati, Estiyanti Erna Febriyanti Fry Voni Steky Muhammad Reza Ratuannisa, Tyar Rino Rakhmata Mukti Veinardi Suendo Viny Veronika Tanuwijaya Viny Veronika Tanuwijaya Yulia, Elfi