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All Journal Majalah Forum Teknik UGM Jurnal Rekayasa Proses Bumi Lestari CHEMICA Jurnal Teknik Kimia Majalah Geografi Indonesia Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan JURNAL KONVERSI Indonesian Journal of Chemistry Jurnal Rekayasa Proses Jurnal Teknik Kimia Indonesia Prosiding SNAST

Edia Rahayuningsih

Department Of Chemical Engineering, Universitas Gadjah Mada

Author-ID : 257556

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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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PENURUNAN LOGAM Hg DALAM AIR MENGGUNAKAN SISTEM SUB-SURFACE FLOW CONSTRUCTED WETLAND (SSF-CW) : STUDI STABILITAS SISTEM Rikhanatul Firdausy Puspitasari; Agus Prasetya; Edia Rahayuningsih
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

High rates of mercury contamination were found in traditional gold mining areas. This problem might occur due to the use of amalgamation process in gold extraction process done in traditional gold mining areas by dissolving the gold-bearing rocks with mercury (Hg). The use of mercury in the gold mining activity has contaminated the water with Hg which might lead to serious health problems. This research was done by discharging the wastewater contaminated by Hg to enter a system called the Sub-Surface Flow Constructed Wetland (SSF-SW). The system employed a mixture of soil and the fibers of water hyacinth as the media which media was also planted with Echinodorus palaefolius L. The research was done by flowing the wastewater containing HgCl2 at 8.59 mg/L. The experiments applied flow rate at 6.3 L/hour and pH between 6-7 in room temperature. Samples were collected at hour 0; 3.5; 7; 10.5 every day. The SSF-CW system was continually run for 10.5 hours and 13.5 hour batch. The result of this research showed the efficiency of Hg removal reached 92.798%. The percentages of Hg accumulation in Echinodorus palaefolius L. were found at 65.96% in the roots, 18.75% in the stems, and 15.29% in the leaves. This research found that the SSF-CW offers a stable system to reduce the mercury levels as shown in the growth of the plant and the total Hg removal efficiency. Plants with Hg exposure have distinct patterns of chlorosis. Some leaves turning yellow and die, others start with new growth. In addition, the growth of Echinodorus palaefolius L. was also influenced by the amount of nutrients in the soil. The rate of metal transfer from the roots to the buds of mexican sword plants was found at 0.236. This research found that the SSF-CW offers a stable system to reduce the mercury levels as shown in the growth of the plant and the total Hg removal efficiency. Plants with Hg exposure have distinct patterns of chlorosis. Some leaves turning yellow and die, others start with new growth. In addition, the growth of Echinodorus palaefolius L. was also influenced by the amount of nutrients in the soil.

Kinetika Reaksi pada Pembuatan Glifosat dari N-PMIDA (Neophosphonomethyl Iminodiacetic Acid) dan H2O2 dengan Katalisator Pd/Al2O3 Irmawaty Sinaga; Edia Rahayuningsih; I Made Bendiyasa
Jurnal Rekayasa Proses Vol 3, No 2 (2009)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.566

Kebutuhan glyphosate di Indonesia meningkat sebanyak 0,75% per tahun. Saat ini, Indonesia mengimpor bahan ini dari Cina. Untuk mengurangi jumlah glyphosate impor, dibutuhkan glyphosate hasil produksi lokal. Penelitian ini bertujuan untuk mencapai kecepatan reaksi primer dalam memproduksi glyphosate dari neophosphonomethyl iminodiacetic acid (NPMIDA) dan hidrogen peroksida (H2O2), dan kecepatan reaksi sekunder AMPA pada variasi rasio reaktan dan suhu. Katalisator yang digunakan adalah palladium pada alumina (Pd/Al2O3). Lima gram NPMIDA dimasukkan ke dalam sebuah labu leher tiga 500 mL, dan 85 mL akuades ditambahkan ke dalamnya. Kemudian, 1 mL H2O2 ditambahkan ke dalam labu tersebut setiap 20 menit. Produk dari reaksi di saring dengan penyaringan vakum dan direaksikan dengan 130 mL etanol. Pemisahan glyphosate dilakukan dengan menyaring dan mencucinya dengan etanol dan dietil eter. Kemurnian produk glyphosate dianalisa menggunakan spektrometer UV/Vis. Kata kunci: glisin, oksidasi, katalisator logam mulia The need of glyphosate in Indonesia is increasing by about 0.75% annually. Nowadays, Indonesia imports the compound from China. In order to decrease the amount of imported glyphosate, it is necessary to produce it locally. This research aims at achieving primary reaction rate of producing glyphosate from neophosphonomethyl iminodiacetic Acid (NPMIDA) and hydrogen peroxide (H2O2), and secondary reaction rate of aminomethylphosphonic acid (AMPA) at various reactant ratios and temperatures. Palladium supported alumina (Pd/Al2O3) was used as catalyst. Five grams of NPMIDA was added into a-500 mL three neck flask, and 85 mL aquadest was poured into it. Then, 1 mL H2O2 was added into the three neck flask every 20 minutes.. The product was vacuum-filtered and reacted with 130 mL ethanol. Separation of glyphosate was performed by filtering and washing it with ethanol and diethyl ether. The purity of glyphosate product was analyzed using UV/Vis spectrometer. Keywords: glycine, oxidation, noble metal catalyst

Penurunan Logam Hg dalam Air Menggunakan Sistem Sub-Surface Flow Constructed Wetland: Studi Efektivitas Rikhanatul Firdausy Puspitasari; Agus Prasetya; Edia Rahayuningsih
Jurnal Rekayasa Proses Vol 13, No 1 (2019)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

A B S T R A C THigh amount of Mercury contamination is commonly found in traditional gold mining areas. This problem might occur due to the use of amalgamation process in traditional gold extraction process by dissolving the gold-bearing rocks with mercury (Hg). The utilization of mercury in gold mining activity has contaminated the water with Hg which might lead to serious health problems. This research was carried out by discharging the Hg-contaminated wastewater to enter a system called the Sub-Surface Flow Constructed Wetland (SSF-SW). The system employed a mixture of soil and the fibers of water hyacinth as the media on which Echinodorus palaefolius L. was planted. The wastewater containing HgCl2 at 8.59 mg/L was flown. The flow rate and pH were set to 6.3 L/hour and 6-7 pH at room temperature. Samples were collected at 0; 3.5; 7; 10.5 hours every day. The SSF-CW system was continually run for 10.5 hours and 13.5hour batch. The result of this research showed that the efficiency of Hg removal reached 92.79%. The results showed that the SSF-CW offers a stable system to reduce the mercury levels as shown in the growth of the plant and the total Hg removal efficiency. Plants with Hg exposure have distinct patterns of chlorosis. Some leaves turning yellow and die, others start with new growth. In addition, the growth of Echinodorus palaefolius L. was also influenced by the amount of nutrients in the soil.Keywords: Echinodorus palaefolius L., mercury, sub-surface flow constructed wetland A B S T R A KPencemaran merkuri banyak ditemukan pada penambangan emas tradisional. Pada umumnya proses yang diterapkan dalam penambangan emas tradisional dalam ekstraksi emas adalah proses amalgamasi, yaitu dengan cara mencampur bijih emas dengan merkuri (Hg). Aktivitas penambangan dengan memanfaatkan Hg menyebabkan tercemarnya air dengan Hg yang dapat membahayakan kesehatan. Penelitian ini dilakukan dengan cara mengalirkan air limbah Hg ke dalam sistem Sub-Surface Flow Constructed Wetland (SSF-CW). Media yang digunakan berupa campuran tanah dan serat eceng gondok serta ditanami dengan Echinodorus palaefolius L. Penelitian dilakukan dengan mengalirkan air limbah HgCl2 berkonsentrasi 8,59 mg/L. Percobaan menggunakan laju alir 6,3 L/jam dengan pH sekitar 6-7 pada suhu ruangan. Pengambilan sampel dilakukan pada jam ke 0; 3,5; 7 dan 10,5 pada setiap harinya. Operasi sistem SSF-CW dijalankan 10,5 jam kontinu dan 13,5 jam batch. Hasil penelitian menunjukkan efisiensi penurunan Hg sebesar 92,79%. Penelitian menunjukkan bahwa sistem SSF-CW cukup stabil. Kestabilan sistem SSF-CW dalam menurunkan kadar Hg dapat dilihat dari pertumbuhan tanaman dan total penurunan yang diperoleh. Tanaman yang terpapar Hg terlihat bercak klorosis. Beberapa daun menguning dan mati, sebagian lain tumbuh tunas baru. Pertumbuhaan Echinodorus palaefolius L. tidak lepas dari pengaruh unsur hara yang terdapat di dalam tanah.Kata kunci: Echinodorus palaefolius L., merkuri, sub-surface flow constructed wetland

Preservation of Natural Colorant Extract of Jalawe Fruit Peel (Terminalia bellirica) in Water-Based Solution Edia Rahayuningsih; Ayub Wijayanto; Putri Nurfitasari
Indonesian Journal of Chemistry Vol 16, No 3 (2016)
Publisher : Universitas Gadjah Mada

The general objective of this study is to preserve natural colorant extract of jalawe fruit peel in water-based solution during storing. The specific objectives in this research are finding suitable type and amount of antimicrobial compound to prevent biological degradation of the natural colorant jalawe extract, as well as determining the colorant half-life by evaluating its degradation rate. The colorant extract solution was added to a reactor followed by addition of an antimicrobial compound. Samples were taken at certain periods of time and they were then centrifuged to separate the flock from the mixture. The amounts of colorant compound in the solution and microbes in the flock were analyzed using a gravimetric method. The results showed that solutions of formaldehyde in water and chitosan in acetic acid could inhibit the degradation of jalawe extract. The most effective concentrations of formaldehyde and chitosan in the jalawe extract were 0.015 and 0.125%, respectively, with respect to total volume of the extract. The half-life of jalawe extract in a water based solution with the addition of formaldehyde and chitosan was 140 and 180 days respectively, while that without any addition of the antimicrobial compounds was 25 days.

Optimization Model on the Effect of Clove Oil, Formaldehyde, and Chitosan Added to Batik Fabric Colored with Gambier (Uncaria gambir Roxb): Antifungal Properties and Stability Edia Rahayuningsih; Felix Arie Setiawan; Conny Julanda Ayanie; Ambrosius Aditya Antoko; Yosephine Intan Ayuningtyas; Himawan Bayu Petrus
Indonesian Journal of Chemistry Vol 20, No 1 (2020)
Publisher : Universitas Gadjah Mada

Triggered by the concept of sustainability, the use of natural dyes in batik fabric processing has increased recently. To inhibit fungus growth on batik fabric colored with natural dyes, either clove oil or formaldehyde was added as an antifungal agent. To increase the stability of the interaction between the antifungal agent and the batik fabric, chitosan was used as a crosslinker. A modified version of the standard tests American Association of Textile Chemists and Colorists (AATCC) 30 and Response Surface Methodology (RSM) was applied as the characterization method. The results showed that the growth percentage of fungi in Batik treated with either clove oil or formaldehyde was much lower than that in the control sample. Growth of Aspergillus niger could be prevented by about 32% using clove oil and 94% using formaldehyde. The optimal condition was obtained with 1% chitosan as a crosslinking reagent, 15.91 ppm of formaldehyde, and 60-min immersion time, with absorbance intensity of formaldehyde crosslinking solution and fungus growth areas being 0.159 and 2.47%, respectively.

Optimasi Aplikasi Pelapisan Nanopartikel Seng Oksida pada Kain Katun-Indigo dengan Response Surface Methodology Renung Reningtyas; Edia Rahayuningsih; Yuni Kusumastuti; Indriana Kartini
Eksergi Vol 20, No 2 (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.v20i2.9877

The use of nanomaterial as a finishing agent in the textile industry continues to be developed. Nanoparticle zinc oxide (ZnONP) has anti-UV properties so that it can be used to protect the color of the fabric from fading. Constraints of using nanomaterial as a functionalization agent on fabric are the process of application and also its poor adhesion. This research aims to optimize ZnONP coating on cotton-indigo fabric so that ZnONP can be maximized adsorbed with good durability. Optimization is carried out by the Response Surface Methodology (RSM) method, with the independent variables are: ZnoNP Dispersion volume, the number of coating, and the method of coating (with and without sonication assisted). The response variable is the adsorbed ZnONP in fabric sample after the washing process. The number of coating and sonication-assisted coating gives significant results in increasing the number of adsorbed ZnONP.

Co-Authors Agus Prasetya Ahmad Tawfiequrrahman Yuliansyah Ai Siti Fatimah Ambrosius Aditya Ambrosius Aditya Antoko Aswati Mindaryani Ayub Wijayanto Boma Wikan Tyoso Bostang Radjagukguk Bostang Radjagukguk Conny Julanda Ayanie Conny Julanda Ayanie Evitasari, Rachma Tia Felix Arie Setiawan Himawan Bayu Petrus I Made Bendiyasa Indriana Kartini Irmawaty Sinaga Mukti Mukti Putri Nurfitasari Renung Reningtyas Rikhanatul Firdausy Puspitasari Rikhanatul Firdausy Puspitasari Rizal I. Rosyid S Supranto Tjahyo Nugroho Adji Visi Asriningtyas Wahyudi Budi Sediawan Wiratni Budhijanto Yosephine I. Ayuningtyas Yosephine Intan Ayuningtyas Yosephine Intan Ayuningtyas Yuni Kusumastuti Zakiah Awalia J S Dahlan

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