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All Journal Jurnal Teknik Kimia USU FLUIDA Jurnal Difusi Jurnal Teknik Kimia USU Industrial Research Workshop and National Seminar Jurnal Teknik Kimia dan Lingkungan Journal of Green Science and Technology
Suminar, Dian Ratna
Jurusan Teknik Kimia, Politeknik Negeri Bandung
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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POLBAN Chemical Engineering Community Empowerment at SMPN 15 Bandung Supporting Circular Economy Lidya Risang Ayu; Dianty Rosirda Dewi Kurnia; Rispiandi; Dian Ratna Suminar; Rony Pasonang Sihombing
Jurnal Difusi Vol. 9 No. 1 (2026): Jurnal Difusi
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Bandung

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Abstract

School waste management is a critical issue in Indonesia as it has not been prioritized effectively. Students generate approximately 25–100 grams of waste per day, potentially affecting environmental quality and public health. To address this issue, the Indonesian Ministry of Education and Culture introduced the Adiwiyata program in 2015 to encourage environmentally conscious schools. As part of the Tri Dharma of Higher Education, community service activities support knowledge transfer between universities and society to strengthen this program. This activity was conducted at SMPN 15 Bandung through demonstrations and counseling involving students and teachers, emphasizing circular economy principles and environmental empowerment. Ecoprint innovation introduced eco-friendly totebag coloring using natural plant pigments. Ecocraft activities promoted recycling through keychain production to increase material value. Additionally, ecofood innovation highlighted the utilization of watermelon rind, containing water, fiber, and bioactive compounds, as a value-added food product to reduce waste and improve economic potential.
Pengaruh Kondisi Operasi Terhadap Kualitas Aluminium Stearat dalam Reaktor Batch Dian Ratna Suminar; Rezza Lingga Permana; Yashinta Amellia; Mukhtar Ghozali; Robby Sudarman; Rony Pasonang Sihombing
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.22678

Abstract

Aluminum stearate has the same potential as aluminum soap as a lubricant additive that can be developed towards standardization of commercial products. The research stages consist of: (1) Making sodium soap through saponification reaction (stearic acid and NaOH), (2) Replacing sodium metal with aluminum metal through trans-saponification reaction, (3) Purifying the product by washing with distilled water, (4) Separation and drying of the product using a Buchner funnel and oven at 100 oC for 3 hours, (5) Analytical test of aluminum stearate product: testing melting point, water content, ash content, free fatty acid content, quantitative content using AAS spectrophotometer, and solubility test. The results of the study showed that aluminum stearate can be made through 2 reaction stages, namely saponification and trans-saponification in the form of a white powder with a melting point of 115.7 oC, ash content of 13.93%, maximum free fatty acid content of 0.9372%, and insoluble in water and chloroform; partially soluble in n-hexane and toluene waste; and soluble in paraffin, methanol, and nitric acid.
Effectiveness Of Activated Carbon Of Reed (Imperata Cylindrica) As Methyl Orange Bioadsorbent with Batch Adsorption Method Dian Ratna Suminar; Dicky Harianto; Najmi Fauziah; Dea Tri Febrian; Luthfiana Kharisma; Tifa Paramitha
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10655

Abstract

The use of synthetic textile dyes causes environmental problems, namely the waste produced is still colored and difficult to degrade. Methyl orange is a synthetic dye in the textile industry which has low solubility in water, is difficult to degrade, has the potential to be carcinogenic and is toxic. To overcome this, adsorption can be carried out using activated carbon from reeds. This research aims to find out how active carbon of reeds is absorbed in methyl orange using the batch method with Langmuir isotherm analysis. Research methods include pretreatment of reeds, manufacture and activation of reeds carbon, testing the characteristics of activated carbon, adsorption process, and analysis of adsorption results using a UV-Vis spectrophotometer. The research was carried out by varying the concentration of methyl orange solution, adsorption time, and mass of activated carbon used. From the research, optimum conditions were obtained for the methyl orange adsorption process using reed activated carbon for 120 minutes with an activated carbon mass of 0.3 grams, a final concentration of 7.328 ppm was obtained with an initial concentration of 10 ppm, and a % adsorption of 26.72%.
Co-Authors Ade Yanti Nurfaidah Amellia, Yashinta Andrijanto, Eko Anindita, Faradila Annisaa Fitri Wulandari Asri Dwi Saffanah Dea Tri Febrian Destri Muliastri Dheana Putri Lestari Dianty Rosirda Dewi Kurnia Dicky Harianto Fajriati, Ramadhana Suci Ghozali, Mukhtar I Wayah Adithama Nugraha Lidya Risang Ayu Lingga Permana, Rezza Luthfiana Kharisma Magfira Ayunda Salsabilla Mukhtar Ghozali Mukhtar Ghozali Najmi Fauziah Nelson Saksono Nelson Saksono Ngatin, Agustinus Nurcahyo Nurcahyo Nurcahyo, Nurcahyo Oki Putra Paqih Purnama Alam Paramitha, Tifa Rezza Lingga Permana Rheisya Talitha Azzahra Rifki Ardiansyah Rispiandi Robby Sudarman Rusdan Fadila Setyaningrum, Sinta Sihombing, Rony Pasonang Triyoga Meiditama Putra Yashinta Amellia