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KAJIAN ADSORPSI Ag(S2O3)23- DALAM LIMBAH FOTOGRAFI PADA ADSORBEN KITIN DAN ASAM HUMAT TERIMOBILISASI PADA KITIN Khoerunnisa, Fitri; Santosa, Sri Juari; Kunarti, Eko Sri
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 9, No 2 (2007): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v9i2.327

This work was started with isolation of humic acid from peat soil and chitin from crab shell, immobilization of humic acid on chitin, and characterization of adsorbents of C and HAC. Optimum condition was studied by interacting the adsorbents with Ag(S2O3)23- in a synthetic solution on variousÂ of pH from 2 to 10. Adsorption rate was studied by interacting the adsorbent with Ag(S2O3)23- in the synthetic solution on various time from 2 to 120 minutes. The determination of the energy and the capacity of adsorption were studied by interacting the adsorbent with Ag(S2O3)23- on various initial concentration from 2 to 75 ppm. Moreover, the mechanism of adsorption was studied by applying a sequential desorption using H2O, Na2EDTA 0.1 M, KSCN 0.5 M, and KOH 1 M. The adsorption of Ag(S2O3)23- in photography wastewater on C and on HAC were studied at the same condition as obtained for the synthetic solution. The result showed that pH 2 was the optimum adsorption condition for Ag(S2O3)23- in the synthetic solution on both C and HAC adsorbents. Ag(S2O3)23- in the synthetic solution was chemically adsorbed on C and on HAC, involving energy adsorption of 22.74â23.30 kJ/mole, respectively. Adsorption of Ag(S2O3)23- on C was faster than that on HAC with the rate constants for adsorbent C and HAC were 73 x 10-4 and 46 x 10-4 minute-1, respectively. Adsorption capacity of Ag(S2O3)23- on C and on HAC were 2.107 x 10-4 and 1.818 x 10-4 mole/g, respectively. The amount of Ag(S2O3)23- in photography wastewater that was adsorbed on C and on HAC were 13.52 and 12.47 mg/L, respectively. The hydrogen bonding and ion exchange were the dominant mechanism of adsorption.Key words: Ag(S2O3)23-, adsorption, chitin, immobilization, humic acid.

SINTESIS KALIKS[4]RESORSINARENA DARI MINYAK KAYUMANIS DAN PENGGUNAANNYA UNTUK EKSTRAKSI FASA PADAT LOGAM BERAT HG(II) DAN PB(II) Sardjono, Ratnaningsih E.; Dwiyanti, Gebi; Aisyah, Siti; Khoerunnisa, Fitri
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 12, No 1 (2008): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v12i1.318

Sintesis C-sinamal kaliks[4]resorsinarena (CSKR) dari minyak kayumanis dan penggunanannya untuk ekstraksi fasa padat logam berat Pb(II) dan Hg(II) telah dilakukan. CSKR diperoleh sebanyak 75% sebagai produk reaksi resorsinol dan sinamaldehida pada 77oC selama 24 jam. Isolasi sinamaldehida dari minyak kayumanis melalui metode bisulfit menghasilkan sinamaldehida sebanyak 79% dengan kemurnian 99,5%. Ekstraksi fasa padat Pb(II) dan Hg(II) oleh CSKR dilakukan dalam sistem batch pada berbagai pH, waktu interaksi, dan konsentrasi logam. Ekstraksi fasa padat Pb(II) berlangsung optimum pada pH 4, waktu interaksi 180 menit, dan konsentrasi awal 6,6 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Langmuir, serta memberikan kapasitas ekstraksi sebesar 1,986 ïmol/g atau 37,2%. Sementara itu, ekstraksi fasa padat Hg(II) berlangsung optimum pada pH 5, waktu interaksi 180 menit, dan konsentrasi awal 0,36 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Freundlich, serta memberikan kapasitas ekstraksi sebesar 0,71 ïmol/g atau 79,1%.Kata kunci :Â Ekstraksi Fasa Padat, Kaliks[4]resorsinarena, Minyak Kayumanis, Hg(II), Pb(II)Â Â

SINTESIS KALIKS[4]RESORSINARENA DARI MINYAK KAYUMANIS DAN PENGGUNAANNYA UNTUK EKSTRAKSI FASA PADAT LOGAM BERAT HG(II) DAN PB(II) Sardjono, Ratnaningsih E.; Dwiyanti, Gebi; Aisyah, Siti; Khoerunnisa, Fitri
Jurnal Pengajaran MIPA Vol 12, No 2 (2008): JPMIPA: Volume 12, Issue 2, 2008
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v12i2.35776

Sintesis C-sinamal kaliks[4]resorsinarena (CSKR) dari minyak kayumanis dan penggunanannya untuk ekstraksi fasa padat logam berat Pb(II) dan Hg(II) telah dilakukan. CSKR diperoleh sebanyak 75% sebagai produk reaksi resorsinol dan sinamaldehida pada 77oC selama 24 jam. Isolasi sinamaldehida dari minyak kayumanis melalui metode bisulfit menghasilkan sinamaldehida sebanyak 79% dengan kemurnian 99,5%. Ekstraksi fasa padat Pb(II) dan Hg(II) oleh CSKR dilakukan dalam sistem batch pada berbagai pH, waktu interaksi, dan konsentrasi logam. Ekstraksi fasa padat Pb(II) berlangsung optimum pada pH 4, waktu interaksi 180 menit, dan konsentrasi awal 6,6 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Langmuir, serta memberikan kapasitas ekstraksi sebesar 1,986 ïmol/g atau 37,2%. Sementara itu, ekstraksi fasa padat Hg(II) berlangsung optimum pada pH 5, waktu interaksi 180 menit, dan konsentrasi awal 0,36 mg/L, mengikuti model kinetika pseudo orde dua, mengikuti model isoterm Freundlich, serta memberikan kapasitas ekstraksi sebesar 0,71 ïmol/g atau 79,1%.

KAJIAN ADSORPSI Ag(S2O3)2 3- DALAM LIMBAH FOTOGRAFI PADA ADSORBEN KITIN DAN ASAM HUMAT TERIMOBILISASI PADA KITIN Khoerunnisa, Fitri; Santosa, Sri Juari; Kunarti, Eko Sri
Jurnal Pengajaran MIPA Vol 9, No 2 (2007): JPMIPA: Volume 9, Issue 2, 2007
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v9i2.35754

This work was started with isolation of humic acid from peat soil and chitin from crab shell, immobilization of humic acid on chitin, and characterization of adsorbents of C and HAC. Optimum condition was studied by interacting the adsorbents with Ag(S2O3)2 3- in a synthetic solution on various of pH from 2 to 10. Adsorption rate was studied by interacting the adsorbent with Ag(S2O3)2 3- in the synthetic solution on various time from 2 to 120 minutes. The determination of the energy and the capacity of adsorption were studied by interacting the adsorbent with Ag(S2O3)2 3- on various initial concentration from 2 to 75 ppm. Moreover, the mechanism of adsorption was studied by applying a sequential desorption using H2O, Na2EDTA 0.1 M, KSCN 0.5 M, and KOH 1 M. The adsorption of Ag(S2O3)2 3- in photography wastewater on C and on HAC were studied at the same condition as obtained for the synthetic solution. The result showed that pH 2 was the optimum adsorption condition for Ag(S2O3)2 3- in the synthetic solution on both C and HAC adsorbents. Ag(S2O3)2 3- in the synthetic solution was chemically adsorbed on C and on HAC, involving energy adsorption of 22.74â€“23.30 kJ/mole, respectively. Adsorption of Ag(S2O3)2 3- on C was faster than that on HAC with the rate constants for adsorbent C and HAC were 73 x 10-4 and 46 x 10-4 minute-1 , respectively. Adsorption capacity of Ag(S2O3)2 3- on C and on HAC were 2.107 x 10-4 and 1.818 x 10-4 mole/g, respectively. The amount of Ag(S2O3)2 3- in photography wastewater that was adsorbed on C and on HAC were 13.52 and 12.47 mg/L, respectively. The hydrogen bonding and ion exchange were the dominant mechanism of adsorption.

BIODEGRADASI SIFAT TOKSIK LOGAM BERAT KROM DALAM LIMBAH CAIR INDUSTRI Nahadi, Nahadi; Hernani, Hernani; Khoerunnisa, Fitri
Jurnal Pengajaran MIPA Vol 6, No 2 (2005): JPMIPA: Volume 6, Issue 2, 2005
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v6i2.34995

Telah dilakukan penelitian degradasi sifat toksik logam berat krom oleh bakteri melalui rekasi enzimatik yang mengubah krom(VI) toksik menjadi krom(III) yang kurang toksik. Penelitian dilakukan dengan memvariasikan pengaruh beberapa parameter terhadap reaksi enzimatik ini yaitu; jumlah bakteri, tingkat keasaman dan konsentrasi krom(VI).Untuk menentukan konsentrasi krom(VI) yang tereduksi menjadi krom(III) digunakan teknik spektrofotometri UV-Vis. Jumlah krom(VI) yang tereduksi menjadi krom(III) ditentukan dengan menghitung selisih antara jumlah krom(VI) sebelum dan sesudah proses transformasi.Hasil analisis menunjukkan bahwa efektivitas transformasi krom(VI) menjadi krom(III) dipengaruhi oleh parameter-parameter di atas. Transformasi krom(VI) menjadi krom(III)Â sangat dipengaruhi oleh pH larutan. Kondisi keasaman optimum untuk terjadinya transformasi krom(VI) menjadi krom(III) adalah pada pH = 7.Â Proses transformasi iniÂ meningkat secara linear sebagai fungsi konsentrasi awal, dengan konsentrasi maksimum 30 ppm. Transformasi ini juga berlangsung efektif pada jumlah bakteri satu ose. Tingkat transformasi pada kondisi optimum mencapai 88,4%.

Geothermal: From Education to a New Solution for Renewable Energy Fauziah, Naila Raima; Maoludin, Surya Alfin; Ramadhan, Wildan Septi; Wafi, Wulanda; Khoerunnisa, Fitri; Winarno, Nanang
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Fossil energy is still the main contributor in Indonesia. In fact, based on a study it is stated that fossil fuels will only last 50-70 years. For this reason, it is necessary to increase the role of geothermal energy as renewable energy. Geothermal energy is very good if it is developed into a new and renewable energy source because it has a good impact on the environment. Geothermal energy also does not damage the local conditions such as mining activities so that biodiversity is preserved. Then, the operation period of the Geothermal Power Generation (known as PLTP) can be more than 30 years and does not require fuel. Geothermal energy is environmentally friendly, and its potential impact on pollution is minimal. Thus, geothermal energy is the right solution to overcome dependence on fossil energy that is not renewable and is expected to run out in the near future.

Eco Cooler for Cooler House without Electricity for Educational Purposes Antonio, Alvito; Hasanah, Maulidah; Damayanti, Novita; Devina, Oryza Aprilia; Khoerunnisa, Fitri; Winarno, Nanang
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

The earth's temperature from 1981 to February 2021 has relatively increased. The increase in temperature on earth has made many people choose to use air conditioning so that the temperature in their homes is not too cold. The energy demand from air conditioning worldwide will be three times as much by 2050. Bangladesh has created a system called the Eco-Cooler as an alternative to lowering room temperature without using large electrical energy so as to save energy and costs. The eco-cooler can reduce temperatures from 1-3ËšC in a room with a size of 4.2 Ã— 4.2 Ã— 3.3 m3 using an Eco-cooler with a bottle diameter of 6 cm and a board area of 48 Ã— 48 cm2. This can be a good educational point for being applied in Indonesia. The advantage of using the Eco-Cooler is that it is easy to maintain, easy to use, the air is more humid, and it saves energy.

The Efficient Implementation of Hybrid Power Plants in Indonesia Perdiansyah, Farhan; Fitriana, Eka Tiara Nur; Aziema, Nur; Maharani, Permata Putri; Khoerunnisa, Fitri; Winarno, Nanang
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

The energy crisis is a serious issue that all countries around the world are dealing with, particularly the energy sources used to generate electricity. There are numerous alternative energy sources available in nature, such as solar energy, wind energy, and so on. Wind and solar energy as hybrid energy sources are thought to be promising in electric generation technology. Hybrid Power Plants can also be used to address the issue of limited electrical energy supply in Indonesia's remote areas. The purpose of this study is to describe the effectiveness of the hybrid power plants implementation in Indonesia. The study was conducted using the narrative literature review method. It can be inferred that the purpose of developing this hybrid technology, among others, is to obtain more efficient electrical energy generation by combining the advantages of two or more types of power generation systems that work in an integrated manner as a compact system. The produced electric energy can be stored in the battery. In terms of use, the produced direct current (DC) is converted into alternating current (AC) using the inverter system prior to distribution to consumers. Therefore, this hybrid power plant is suitable to be implemented in Indonesia.

Synthesis and Characterization of Calcium Oxide Nanoparticles and Their Application in the Adsorption of Indigo Carmine Maharani, Brigitta Stacia; Khoerunnisa, Fitri; Anwar, Budiman; Hendrawan, Hendrawan; Hamidah, Ida; Nurhayati, Mita; Sanjaya, Eli Hendrik
Jurnal Kartika Kimia Vol 7 No 1 (2024): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v7i1.253

This research aims to determine the optimum conditions for the synthesis of CaO nanoparticles using the coprecipitation method, determine the characteristics of the CaO nanoparticles synthesized, and determine the effect of the performance of CaO nanoparticles as an adsorbent for indigo carmine dyes. CaO nanoparticles were successfully synthesized using the coprecipitation method at the optimum conditions of 1 M NaOH concentration and formation temperature of 400+200℃ with the highest % yield reaching 74.56%. The successful formation of CaO nanoparticles was proven by the appearance of a 2-theta diffraction peak of 23.12°; 39.2°; 57.9°; and 67.2° which is identical to the lattice structure of CaO with hkl indices (200), (311), (422) and (600) and a crystal size of up to 4.96 nm. SEM images support the formation of CaO nanoparticles with an average particle size of 98.1 nm and a varying size distribution. The IR spectrum of the formation of CaO nanoparticles with the appearance of Ca-O peaks at wavelengths of 3640, 1400, 860, and 791 cm-1. The adsorption capacity of indigo carmine on CaO nanoparticles was greatest at an adsorbent dose of 10 mg, adsorbate concentration of 100 ppm and a contact time of 50 minutes. The most appropriate adsorption isotherm model and adsorption kinetics model was the Koble-Corrigan model and the pseudo second order model, respectively.

A Systematic Review: Chitosan/ Poly (vinyl alcohol) based Hydrogel composites for Drug Delivery Material Annifah, Riri Uswatun; Kadarohman, Asep; Khoerunnisa, Fitri; Nurhayati, Mita; Hendrawan, Hendrawan; Anwar, Budiman
Jurnal Kartika Kimia Vol 7 No 1 (2024): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v7i1.254

This review article aims to systematically describe the synthesis methods, characterization, and performances of CS/PVA based hydrogel composites as drug delivery materials. The literature review was conducted through ScienceDirect and Google Scholar, where the article selection is based on Scopus index in the Q1 and Q2 categories within the past 5 years. The synthesis of CS/PVA hydrogel was performed using various methods, including crosslinking, freeze-thaw, and sol-gel. The synthesis methods of hydrogel composites included crosslinking, freeze-thaw, and sol-gel. Characterization of hydrogel composites was conducted using FTIR spectroscopy, SEM, and swelling ratio measurement. CS/PVA-based hydrogel composites as drug delivery materials have been successfully synthesized using crosslinker, freeze-thaw and sol-gel methods. FTIR spectra indicated that drug was successfully loaded into CS/PVA based hydrogel composite matrix, involving the hydrogen bonding as predominant mechanism of interaction between precursors and drug functionalities. The best swelling capacity was obtained in the CS/PVA/Tetracycline based hydrogel composites, up to 949%. The SEM images indicated the homogeneous morphological structure and surface of hydrogel composites. The CS/PVA/Tetracycline based hydrogel composites exhibited the largest cumulative drug release of 99.44%. The drugs loaded CS/PVA hydrogel composites are promising as a drug delivery material.

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