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All Journal EKSAKTA: Journal of Sciences and Data Analysis IJCER (International Journal of Chemistry Education Research) Journal of Aquaculture Science International Journal of Applied Business and Information Systems IJCR (Indonesian Journal of Chemical Research) Jurnal Pijar MIPA
Mai Anugrahwati
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Islam Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Materials Science & Nanotechnology Mathematics Physics

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Pengaruh Senyawa Kimia Dalam Limbah Penyulingan Minyak Atsiri Terhadap Aktivitas E.coli Anugrahwati, Mai; Wicaksono, Wiyogo Prio; Nurlestari, Rizqy
Journal of Aquaculture Science Vol 2, No 1 (2017): Journal of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.255 KB) | DOI: 10.31093/joas.v2i1.17

Abstract

Effect of chemical compounds in the wastes of essential oil distillation including lime leaves, lemongrass leaves, ylang-ylang flower, and coriander seed on the activity of Escherichia coli has been performed. In this research, observation was done by using microbial fuel cell (using E.coli) with two compartments were connected by nafion membrane and zinc plats were used as electrodes which were connected by copper wire and multimeter. Energy production from the cell was shown from the generated current due to the E.coli’s oxidation activity to the substrates (distillation wastes). Results from the research exhibited that chemical compounds in the lime leaves positively affected to the bacterial activity with the generated current present up to 20 µA. It is also observed that mass variation of the substrates significantly affected the current generation. Chemical compounds in the three other wastes were found to be not as effective as lime leaves because from the analysis of their methanol extracts by GC-MS indicated that these contained antibacterial compounds such as octadecanoic acid and rosifoliol. Conclusion from the research was not all of wastes from essential oil distillation have a potency to be used as substrates in the microbial fuel cell as some of these chemicals had an antibacterial property which negatively affected the E.coli bacterial activity in the cell. Keywords : microbial fuel cell, Escherichia coli, waste of essential oil distillation.
Adsorption Study of Methylene Blue and Methyl Orange Using Green Shell (Perna Viridis) Febi Indah Fajarwati; Nadya Ika Yandini; Mai Anugrahwati; Amri Setyawati
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss1.art14

Abstract

Green shell is generally disposed of and become environmental contaminants. In this study, the green shell was used as material to adsorb dyes residue: methylene blue and methyl oranges. Green shell waste from seafood was prepared by removing the dirt then dried at room temperature. It was followed by roughly crushing before being placed in the furnace at temperatures of 300, 500, 700 and 900 °C. The selected adsorbents were sieved at 200 mesh. The adsorbents were characterized by FTIR and SEM-EDX to evaluate their functional groups and morphology. Furthermore, the adsorption process was evaluated by determining the kinetic adsorption models. The results of the FTIR characterization showed the vibration of Ca(OH)2 bone at a wave number of 3400 cm-1 and morphological analysis by SEM showed a homogeneous surface. Adsorption kinetics results obtained from the variation of time with the initial adsorbate concentration showed the kinetic model of both methylene blue and methyl orange adsorption onto the adsorbent followed a pseudo-second order.
Effect of Chemical Compounds in Wastes from Essential Oil Distillation on the Activity of E.coli Mai Anugrahwati; Wiyogo Prio Wicaksono; Rizqy Nurlestari
Journal of Aquaculture Science Vol 2 No 1 (2017): Journal of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v2i1.17

Abstract

Effect of chemical compounds in the wastes of essential oil distillation including lime leaves, lemongrass leaves, ylang-ylang flower, and coriander seed on the activity of Escherichia coli has been performed. In this research, observation was done by using microbial fuel cell (using E.coli) with two compartments were connected by nafion membrane and zinc plats were used as electrodes which were connected by copper wire and multimeter. Energy production from the cell was shown from the generated current due to the E.coli's oxidation activity to the substrates (distillation wastes). Results from the research exhibited that chemical compounds in the lime leaves positively affected to the bacterial activity with the generated current present up to 20 µA. It is also observed that mass variation of the substrates significantly affected the current generation. Chemical compounds in the three other wastes were found to be not as effective as lime leaves because from the analysis of their methanol extracts by GC-MS indicated that these contained antibacterial compounds such as octadecanoic acid and rosifoliol. Conclusion from the research was not all of wastes from essential oil distillation have a potency to be used as substrates in the microbial fuel cell as some of these chemicals had an antibacterial property which negatively affected the E.coli bacterial activity in the cell. Keywords : microbial fuel cell, Escherichia coli, waste of essential oil distillation.
Building Model of Flood Cases in Central Java Province using Geographically Weighted Regression (GWR) Tuti Purwaningsih; Citra Saktian Prajaningrum; Mai Anugrahwati
International Journal of Applied Business and Information Systems Vol. 2 No. 2 (2018)
Publisher : Association for Scientific Computing Electrical and Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (668.082 KB) | DOI: 10.31763/ijabis.v2i2.168

Abstract

Indonesia is one of the countries hit by many disasters. During the last five years the disaster increased in the last year, namely in 2016. In terms of the types of disasters, most were floods. The flood disaster has the highest incidence rate in Central Java Province. Flood is a natural phenomenon where there is excess water which is not accommodated by drainage in an area. To be able to identify the risk of flooding that affects humans and their environment, it is necessary to know the causes. The causes of flooding can come from natural and non-natural factors. Seeing the high incidence of flooding in Central Java, the authors drew attention to research whether the factors that influence flooding in the province and how to model it by looking at the spatial effects in it using Geographically Weighted Regression (GWR) analysis. The results showed that the incidence of flooding using GWR analysis had four significant variables, namely rainfall, rainy days, humidity and area. From the model obtained, it has R2 of 56%, and has as many as six models of variables that are significant for each region.
Characteristic comparison of cornstarch-based bioplastics using kaolin, microcrystalline cellulose and chitosan as fillers Mai Anugrahwati; Meilani Dwi Putri Nasution; Febi Indah Fajarwati
Jurnal Pijar Mipa Vol. 17 No. 1 (2022): January 2022
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.848 KB) | DOI: 10.29303/jpm.v17i1.3304

Abstract

In the study, the basic material for making bioplastics was corn starch with the addition of kaolin, microcrystalline cellulose, and chitosan as filler variations, as well glycerol as a plasticizer. The method used was the blending method. The characterization included the absorption test for water resistance, biodegradation test, tensile and elongation strength test, and functional group analysis using FTIR. Among fillers, the best bioplastic characteristic bioplastic was obtained with filler kaolin with the water absorption value of 88.62%, a tensile strength value of 1.44 x10-3 MPa, and the elongation strength value of 5.04%. Nearly 80% of the material was degraded in 15 days. Spectra of FTIR showed the appearance of some functional groups from starch, filler, and plasticizer, which meant that the process of bioplastic manufacturing was physical mixing.
The Implementation of Pyrolisis of Waste Material to Bio-Oil in The KKN Course Lutfia Isna Ardhayanti; Mai Anugrahwati; Rico Nurillahi; Ahmad Saeful; Khuswatun Khasanah; Wati Retno Diah
IJCER (International Journal of Chemistry Education Research) VOLUME 2 ISSUE 2, AUGUST 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcer.vol2.iss2.art2

Abstract

Kuliah Kerja Nyata (KKN) is one kind of university contribution to community. Through KKN, student also learn how to apply their knowledge and contribute it to community need. In Universitas Islam Indonesia (UII) there are two kind of KKN which are Reguler and Pembelajaran Pemberdayaan Masyarakat (PPM), which differentiate from the topic used. KKN PPM already has major topic that obtained from village destination need. The problem from KKN PPM is limitation time for student to learn about major topic before socialize to community like in KKN UII 57 unit 310-315 which has pyrolisis method as their major topic. Not all the sudent that include in unit 310-315, which come from different study, understand about pyrolisis. To settle this problem, experimental method was choose as learning method used, which help student understand about pyrolisis in limitation time. The effectiveness of this method was observed by observation, interview and questioner. The result show that expertimental method give good result. The student understand basic concept of pyrolisis process that needed in limitation time, eventhough they did not understand anything about pyrolisis method before.
ADSORPTION STUDY OF MAGNETIC CARBON COMPOSITE FROM SALACCA ZALACCA PEEL AND IRON OXIDE TO REDUCE CHEMICAL OXYGEN DEMAND (COD) LEVELS IN LAUNDRY WASTE Mai Anugrahwati; Febi Indah Fajarwati; Rika Awalin Safitri
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) Volume 5, ISSUE 2, 2020
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664.642 KB) | DOI: 10.20885/ijcer.vol5.iss2.art3

Abstract

Dalam penelitian inidilakukan penelitian terkait sintesis komposit karbon magnetik yang digunakan sebagai adsorben limbah laundry. Komposit ini dibentuk dari perpaduan antara karbon aktif yang berasal dari kulit salak (dalam penelitian ini disebut KASMG) dan besi oksida. Parameter yang dipelajari dalam peneliti ini meliputi karakterisasi adsorben dengan SEM-EDXdan uji adsorpsi dengan variasi massa adsorbensertavariasi waktu kontak. Hasil penelitian menunjukkan bahwa komposit karbon magnetik berhasil disintesis dan SEM-EDX menunjukkan adanya besi oksida padapermukaan karbon aktif. KASMG memiliki kemampuan untuk mengadsorp zat organik dalam limbah dimana kemampuan ini bertambah seiring dengan meningkatnya massa adsorben yang digunakan dengan waktu kontak optimum 15 menit.
Adsorpsi Pb(II) dari Air dengan Karbon Aktif dari Kulit Salak Pondoh: Kinetika dan Isoterm Adsorbsi Mai Anugrahwati; Febi Indah Fajarwati; Rika Awalin Safitri
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) Volume 6, ISSUE 1, 2021
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (848.927 KB) | DOI: 10.20885/ijcr.vol6.iss1.art1

Abstract

Dalam penelitian ini kulit salak pondoh disintesis menjadi karbon aktif sebagai adsorben ion Pb2+. Proses perubahan ini melibatkan metode karbonisasi dan aktivasi yang terjangkau menggunakan KOH. Material adsorben yang diperoleh selanjutnya dikarakterisasi dengan FTIR dan digunakan pada kajian kinetika dan isotherm adsorbsi pada larutan yang mengandung Pb2+. Hasil karakterisasi menunjukkan gugus fungsi yang mungkin terlibat dalam adsorpsi seperti O-H. Pada aplikasi adsorpsi, penentuan konsentrasi Pb2+ dianalisis menggunakan Spektrofotometri Serapan Atom (SSA). Kondisi waktu optimum adsorpsi dalam penelitian ini adalah 15 menit dengan kapasitas adsorpsi mencapai 90% dimana  kinetika adsorbsi mengikuti pseudo orde dua sedangkan isotherm  adsorpsinya sesuai dengan persamaan isoterm Langmuir.
Kinetics study of copper (Cu) and chromium (Cr) adsorption using green mussel shells (Perna viridis) adsorbent Febi Indah Fajarwati; Asfiya Mahanani; Mai Anugrahwati
Jurnal Pijar Mipa Vol. 18 No. 1 (2023): January 2023
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v18i1.4613

Abstract

Research has been carried out on making green mussel shell adsorbents to absorb Cu and Cr metals. The study of making green mussel shell adsorbents was carried out by thermal activation using a furnace. The results of the activated adsorbent were characterized using FTIR and SEM-EDX. Furthermore, the adsorbent was used to absorb Cu and Cr metal by using several variations, namely variations in the temperature of the adsorbent activation, adsorbent weight, pH, and contact time, and knowing the kinetic model by determining the reaction order. The results obtained from the characterization of green mussel shells contain elements of Ca, about 67.56% at an activation temperature of 500 °C and 67.34% at an activation temperature of 900 °C. The optimum conditions for Cu metal adsorption by green shell adsorbent were obtained at an activation temperature of 500 °C, using an adsorbent of 1 gram under pH 10 and a contact time of 40 minutes. Whereas for Cr metal absorption, the activation temperature was 900 °C, the mass used was 1.5 grams with pH 7 and the contact time was 40 minutes. The adsorption kinetics model of green mussel shells adsorbent on Cu and Cr metals followed pseudo-second-order.
Co-Authors Ahmad Saeful Amri Setyawati Asfiya Mahanani Awalin Safitri, Rika Citra Saktian Prajaningrum Fajarwati, Febi Indah Febi Indah Fajarwati Indah Fajarwati, Febi Khuswatun Khasanah Lutfia Isna Ardhayanti Meilani Dwi Putri Nasution Nadya Ika Yandini Nurlestari, Rizqy Rico Nurillahi Rika Awalin Safitri Rizqy Nurlestari Safitri, Rika Awalin Tuti Purwaningsih Wati Retno Diah Wiyogo Prio Wicaksono