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All Journal Reaktor Eksergi: Chemical Engineering Journal CHEMPUBLISH JOURNAL Konversi Info-Teknik Jurnal Teknologi Agro-Industri Makara Journal of Science
Yuli Ristianingsih
Chemical Engineering Department, Universitas Pembangunan Nasional Veteran Yogyakarta
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Journal : Eksergi: Chemical Engineering Journal

 1 
Uji Aktivitas Karbon Aktif Tongkol Jagung Terimpregnasi Fe2O3 sebagai Biosorben Limbah Warna Metilen Blue Fauzan Irfandy; Yuli Ristianingsih; Alit Istiani
Eksergi Vol 18, No 2 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v0i0.4536

Abstract

Methylene blue is one of dying waste that causes harmful effect both enviromental and public health risks. A method to overcome the problem is to adsorb it with the activated carbon. Apart from that, corn cob is potential biomass with can convert to activated carbon. The aim of this research is to syntethic and to modify corn cob activated carbon with iron oxide. It is expected to increase the afinity of methylene blue to the activated carbon surface. The modification is done by wet impregnation and the effectiveness of the impregnated corn cob activated carbon is studied by analyse the persen removal of methylene blue in every interval time. The result show that in the concentration range of Fe load impregnation between 1%-3% which has been used, the corn cob activated carbon with concentration of Fe load 2% has the most optimum ability in methylene blue adsorption with the adsorption capacity 44,9%. Moreover, the effect pH shows that in acidic condition the adsorption of methylen blue is better than in netral condition
PENGARUH JENIS ASAM DAN SUHU EKSTRAKSI TERHADAP KARAKTERISTIK PEKTIN DARI KULIT PISANG KEPOK yuli ristianingsih; Indriana Lestari; Wibiana Wulan Nandari
Eksergi Vol 18, No 2 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v18i2.5400

Abstract

Pectin is structurally and functionally the most complex polysaccharide in plant cell walls. Pectin is widely used as an adhesive and emulsifier in the food, pharmaceutical industry and also as an adsorbent in waste water treatment. This research used banana peels as a raw material. The purpose of this study was to study the effect of temperature and solvent (acetic acid and hydrochloric acid) on the characteristics of pectin (ash content, methoxyl and galacturonic content). This research was carried out in a stirred tank reactor for 90 minutes with various types of solvents (hydrochloric acid and acetic acid) and extraction temperatures (60, 70, 80 and 90) 0C. Based on the research, it was found that the optimum pectin yield with 0.25 N HCl at a temperature of 800C was 24.93%. The characteristics of pectin which include galacturonic acid, methoxyl content, ash content and equivalent weight at an extraction temperature of 800C with a concentration of 0.25 N HCl were 79,56%; 2.65; 6,72% and 3846
Adsorption Equilibrium of Methylene Blue By Activated Carbon From Post-Anthesis Male Flower Palm Oil Waste Yuli Ristianingsih; Indriana Lestari; Alit Istiani
Eksergi Vol 19, No 3 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i3.8055

Abstract

Methylene blue (MB) is wastewater from the textile industry. This dye is difficult to degrade naturally because it has a benzene group in its chemical chain. There are several ways to reduce waste, one of the economical ways is by using adsorption. In this study, MB was adsorbed using activated carbon from post-anthesis male flower palm oil (PAMF) waste which was activated using potassium hydroxide (KOH). The adsorption process was carried out at various temperatures (30, 40, and 50℃). The results showed that the addition of a KOH activator could increase the sorption capacity of methylene blue by 25.64%. The optimum temperature is suitable for the adsorption process of methylene blue with activated carbon of PAMF waste activated by KOH at a temperature of 30℃ with an adsorption capacity of 58.4793%. The adsorption equilibrium mechanism was studied using two types of adsorption isotherm models, namely the Langmuir and Freundlich models. Based on the data obtained, the MB adsorption process on activated carbon was compatible with the Freundlich model an R2 of 0.9557.
Studi Isoterm Adsorbsi dan Termodinamika Pada Proses Penyisihan Ion Fe (III) Menggunakan Pektin dari Kulit Pisang Lestari, Indriana; Ristianingsih, Yuli; Istiani, Alit; Anasstasia, Titi Tiara
Eksergi Vol 20, No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.10033

Abstract

Adsorben berupa pektin berhasil diekstraksi dari kulit pisang menggunakan larutan asam kuat dan telah digunakan untuk menyisihkan ion Fe3+ dalam air. Pengaruh berbagai parameter terhadap proses adsorbsi, seperti waktu kontak, pH larutan, dosis adsorben, dan temperatur adsorbsi diinvestigasi dalam suatu sistem batch. Konsentrasi ion Fe3+ dalam larutan air diukur menggunakan Atomic Absorption Spectrometry . Efisiensi adsorbsi terbaik diperoleh pada waktu kontak selama 4 jam, pH larutan 2, dosis adsorben sebesar 3 g, dan temperatur 20oC. Mekanisme proses adsorbsi dan perubahan energi bebas Gibbs, entalpi, serta entropi telah dievalusi. Model isoterm Freundlich dan Temkin paling sesuai untuk menggambarkan mekanisme adsorbsi ion Fe3+ pada pektin dengan R2 berturut-turut 0,9871 dan 0,9591. Data parameter termodinamika membuktikan bahwa adsorpsi ion Fe3+ bersifat eksotermis dan berlangsung secara tidak spontan pada rentang temperatur 20 hingga 60ᵒC. Penelitian ini menunjukkan bahwa kulit pisang dapat dimanfaatkan sebagai adsorben murah yang menjanjikan untuk menghilangkan ion Fe3+ dalam air.
Studi Isoterm Adsorbsi dan Termodinamika Pada Proses Penyisihan Ion Fe (III) Menggunakan Pektin dari Kulit Pisang Lestari, Indriana; Ristianingsih, Yuli; Istiani, Alit; Anasstasia, Titi Tiara
Eksergi Vol 20 No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.10033

Abstract

Adsorben berupa pektin berhasil diekstraksi dari kulit pisang menggunakan larutan asam kuat dan telah digunakan untuk menyisihkan ion Fe3+ dalam air. Pengaruh berbagai parameter terhadap proses adsorbsi, seperti waktu kontak, pH larutan, dosis adsorben, dan temperatur adsorbsi diinvestigasi dalam suatu sistem batch. Konsentrasi ion Fe3+ dalam larutan air diukur menggunakan Atomic Absorption Spectrometry . Efisiensi adsorbsi terbaik diperoleh pada waktu kontak selama 4 jam, pH larutan 2, dosis adsorben sebesar 3 g, dan temperatur 20oC. Mekanisme proses adsorbsi dan perubahan energi bebas Gibbs, entalpi, serta entropi telah dievalusi. Model isoterm Freundlich dan Temkin paling sesuai untuk menggambarkan mekanisme adsorbsi ion Fe3+ pada pektin dengan R2 berturut-turut 0,9871 dan 0,9591. Data parameter termodinamika membuktikan bahwa adsorpsi ion Fe3+ bersifat eksotermis dan berlangsung secara tidak spontan pada rentang temperatur 20 hingga 60ᵒC. Penelitian ini menunjukkan bahwa kulit pisang dapat dimanfaatkan sebagai adsorben murah yang menjanjikan untuk menghilangkan ion Fe3+ dalam air.
Co-Authors Abubakar Tuhuloula Aditya Poetra Anasstasia, Titi Tiara Annisa Fitriani Annisa Fitriani Annisa Fitriani, Annisa Annissa Millenia Ramadhani Arief Budiman Ayuning Ulfa Ayuning Ulfa, Ayuning Bella Santa Rossi Bunga Pertiwi Dian Sylvana Ansari Dian Sylvana Ansari, Dian Sylvana Fakhrizal Fakhrizal Fakhrizal Fakhrizal, Fakhrizal Fariz Maulana Akbar Fauzan Irfandy Fauzan Irfandy Fradita Wanda Sari Gusti Indah Hayati Hayati, Gusti Indah Hernadin, Ivan Aldino Hero Islami I Putu Andika Putra I Putu Andika Putra, I Putu Andika Indriana Lestari Indriana Lestari Iryanti Fatyasari Nata, Iryanti Fatyasari Islami, Hero Isna Syauqiah Istiani, Alit Lestari, Indriana Maria Natalia Maria Natalia Marini Yosi Febrida Muhammad Aulia Fadhil Muhammad Sarwani Nelli Angraeni Nelli Angreani Nelli Angreani, Nelli Nurul Hidayah Paryanti Paryanti Pertiwi, Bunga Primata Mardina Rachmi Syafitri K.S Rachmi Syafitri K.S, Rachmi Rizqi Fauzi Rizqi Fauzi, Rizqi Sarwani, Muhammad Sutijan Sutijan Timotius, Daniel Wibiana Wulan Nandari