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All Journal Jurnal Pendidikan Vokasi INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni International Journal of Renewable Energy Development Jurnal Penelitian Pendidikan Matematika dan Sains Matematika dan Sains Science and Technology Indonesia Indonesian Journal of Chemistry Communications in Science and Technology Martabe : Jurnal Pengabdian Kepada Masyarakat Kumawula: Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmu Hukum KYADIREN Jurnal Abdi: Media Pengabdian Kepada Masyarakat Sains dan Matematika PROFICIO: Jurnal Pengabdian Masyarakat International Journal of Science and Society (IJSOC) Abimanyu: Journal of Community Engagement Jurnal Pijar MIPA International Journal of Islamic Education, Research and Multiculturalism (IJIERM) Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) Molekul: Jurnal Ilmiah Kimia Journal of Engineering and Technological Sciences
Nita Kusumawati
Jurusan Kimia FMIPA Unesa
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Journal : Matematika dan Sains

 1 
UJI KESTABILAN KALIUM FERAT Nur Hayati, ; Nita Kusumawati, ; Bertha Yonata,
Matematika dan Sains Vol 16, No 1 (2009)
Publisher : Matematika dan Sains

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Abstract

The synthesis of potassium ferrate and the optimazion as green chemistry degradator had been studied. The purpose of research was to study the influence of pH and reaction time to potassium ferrate stability. This research was started by synthesis and characterization of potassium ferrate. Some parameters influencing degradation process by ferrate ion, such as pH and molar reaction time have been studied, and the decomposition result was quantization by spectrophotometry UV-Vis. Based on the XRD spectra, it was found that the solid phase potassium ferrate had a tetrahedral structure with a space group of D2h(Pnma). The potassium ferrate solution had a maximum stability at pH 9-10. Decomposition result of ferrate indicated that kinetic constant was stable at spanning time 24-72 hours.2h(Pnma). The potassium ferrate solution had a maximum stability at pH 9-10. Decomposition result of ferrate indicated that kinetic constant was stable at spanning time 24-72 hours.
PEMBUATAN DAN PEMANFAATAN KALIUM FERRAT DALAM PENGOLAHAN LIMBAH ZAT PEWARNA PROCIAN RED MX 8B Yani Ekwandi Wibowo, ; Nita Kusumawati,
Matematika dan Sains Vol 16, No 2 (2009)
Publisher : Matematika dan Sains

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The purpose of this research is to investigate the degradation of procion red MX 8B contain pH effect and molar ratio to degradation it using pottasium ferrate. Synthesis and characterization of pottasium ferrate were performed before it was reacted with procian red MX 8B. The aqueous stability of pottasium ferrate at various pH values and some parameters which influenced the degradation process such as pH and molar ratio of dye:Fe(VI) have been studied. The progress of reaction was followed by UV-Vis spectrophotometry. The aqueous reaction of ferrate with procian red MX 8B was also investigated with a molar ratio of dye:Fe(VI) in the range of 1:1 – 1:5. The results showed that pottasium ferrate solution had a maximum stability at pH 9-10. The optimal pH for degradation of procian red MX 8B was 9.2 and molar ratio dye:Fe(VI) was 1:1. At this pH and molar ratio dye:Fe(VI) approximately 96.5% were degraded after 30 minutes. Degradation process of procian red MX 8B using pottasium ferrate was marked by the shifting of the wave lenght which it has shifted from 545 nm to 296.2 nm.
STUDI PENGARUH TEKANAN OPERASI DAN KOMPOSISI BAHAN PENYUSUN TERHADAP PERMEABILITAS MEMBRAN ULTRAFILTRASI UNTUK Nita Kusumawati,
Matematika dan Sains Vol 17, No 1 (2010)
Publisher : Matematika dan Sains

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Detergent is a kind of liquid waste who can give a dangerous effect to environment. The increasing of detergent uses can make eutrofication effect that can block the sunsine dan decrease O2 in the water. A conventional Detergent waste treatment that have been doing all this time, such as aeration, adsorption with active carbon or bentonite and coagulation with salt of carbonate and sulfate give unstatisfied result cause of small reduction power and high operational cost. Because of that, membrane technology hoped can be alternative technology which is easier and cheaper for detergent separation. In this experiment, the ultrafiltration membrane is made of chitosan that was dissolved in formic acid with variation composition of chitosan 1-3 gram in 100 mL of solvent which after that the membrane was applicated to "dead-end" machine to testing membrane permeability in operational pressure 1-3 atm.. The result of experiments showed that increasing of operational pressure make the membrane permeability ascent. But, in the other side, increasing of chitosan composition make this ultrafiltration membrane permeability descent. The optimum conditions was obtained when membrane with chitosan composition 3 gram was applicated in operational pressure 3 atm, which is the value of fluks (permeability) reach out for 30,80 L/m2 day.2 in the water. A conventional Detergent waste treatment that have been doing all this time, such as aeration, adsorption with active carbon or bentonite and coagulation with salt of carbonate and sulfate give unstatisfied result cause of small reduction power and high operational cost. Because of that, membrane technology hoped can be alternative technology which is easier and cheaper for detergent separation. In this experiment, the ultrafiltration membrane is made of chitosan that was dissolved in formic acid with variation composition of chitosan 1-3 gram in 100 mL of solvent which after that the membrane was applicated to "dead-end" machine to testing membrane permeability in operational pressure 1-3 atm.. The result of experiments showed that increasing of operational pressure make the membrane permeability ascent. But, in the other side, increasing of chitosan composition make this ultrafiltration membrane permeability descent. The optimum conditions was obtained when membrane with chitosan composition 3 gram was applicated in operational pressure 3 atm, which is the value of fluks (permeability) reach out for 30,80 L/m2 day.
PEMBUATAN DAN UJI KEMAMPUAN MEMBRAN KOMPOSIT KITOSAN-PVA UNTUK PEMISAHAN ZAT WARNA RHODAMIN-B Elvina Rossa, ; Nita Kusumawati,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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The aims of research were to know physical characteristic and performance of the chitosan-PVA composite membrane in separating rhodamin-B color with various PVA concentrations and operational pressure. The physical characteristic of membrane tested were tensil strength, stroke, morphology, and porous size. Membrane performance measured were flux value and rejection. Results showed that membrane had high load and high stroke at high concentration of PVA. Load value and stroke value obtained were 0.680-5.646 kgf and 1-9.25%, respectively. Result of SEM analysis showed that membrane produced was microfiltration membrane with porous size of 0.1-1.6 µm. The best flux value was resulted by R-1 membrane at pressure of 5 kg/cm2 namely 27.575 L/m2.hour. While the highest rejection coeficient value was resulted by membrane R-5 at pressure of 1 kg/cm2 namely 91.136%. The rejection coeficient value increased with increasing of PVA concentration, while it decreased with increasing of operational pressure.2 namely 27.575 L/m2.hour. While the highest rejection coeficient value was resulted by membrane R-5 at pressure of 1 kg/cm2 namely 91.136%. The rejection coeficient value increased with increasing of PVA concentration, while it decreased with increasing of operational pressure.
Co-Authors A'yun, Qurrota Ach. Yasin Al Hafidl, Achmad Naufal Ashabul Kahfi Ashabul Kahfi, Ashabul Asrul Bahar Auliya, AR. Sella Berlian, Binar Bertha Yonata Cahyani, Sinta Anjas Dewi Saputri, Ratih Dina Kartika Maharani Dzulkarnain, Shod Abdurrachman Elvina Rossa Erina Rahmadyanti Estiningtyas, Indri Wasa Fachrirakarsie, Fadlurachman Faizal Fatma Listiandari, Intan Gina Noor Djalilah Hafidha, Qonita Arky Hapsari, Veronica Lita Hasanah Jusman, Nur Hery Widijanto I GUST MADE SANJAYA Indah, Novita K. Isyrak, Luthfiyah Iwan Permadi Khafidlah, Ianatul Kurniawan, Muhammad Ridho Hafid Mahanani Tri Asri Maria Monica Sianita Maria Monica Sianita Basukiwardojo MEDA WAHINI Monica, Maria Mugiyanto, Agus Nabila, Mutiara Azfa Nafisatus Zakiyah Naulia, Kaila Nuniek Herdyastuti Nur Hayati Nur Hayati Nurrohman Sidiq, Muhammad Nurzulla, Weka Firda Rizki OCKTAVIANI, YOVI Perdana, Senja Salzanabila Putri Phra Harini, Novitasari Dian Pinto, Floriana A. Pirim Setiarso Prahara, Mirwa Adi Prima Retno Wikandari Putri, Marinda Mayliansarisyah Putri, Sovranita Ramadhani Setiawan Rahayu, Nunik Tri Rahmawati, Khofifatul Ramadanti, Awanda Halida Restuti, Hermasari Rhamdiyah, Fastabiqul Khairati Rinaningsih Riska Nur Safitri, Riska Nur Rita Ismawati Rudi Setiawan, Ahmad Rus, Ridwan Che Rusmini Rusmini Safitri, Rizka Dwi Samik Samik Sanjaya, IGM Sari Edi Cahyaningrum Setiawan, Ferdiansyah Sinta Anjas Cahyani Sri Handajani Supari Muslim Supari Muslim Sutoyo, Suyatno Titik Taufikurohmah TRIMAYANTO, SIGIT Yani Ekwandi Wibowo Yulianto, Egy Henry Zakiyah, Nafisatus