1. Published Collections: Recent submissions

Now showing items 61-80 of 277

Sintesis C-TiO2 Nanotube Array untuk Produksi Hidrogen dari Larutan Gliserol

Ratnawati, Ratnawati; Desela, Tania; Slamet, Slamet (Asosiasi Pendidikan Tinggi Teknik Kimia Indonesia, 2012)

Kebutuhan hidrogen (H2) sebagai energi alternatif dari sumber terbarukan semakin meningkat, sementara teknologi dan kondisi optimum proses produksinya masih banyak diteliti untuk meningkatkan efisiensinya. Sintesis TiO2 ...
Batch electrocoagulation system using aluminum and stainless steel 316 plates for hospital wastewater treatment

R Muttaqin; Ratnawati, Ratnawati; Slamet, Slamet (IOP Publishing, 2021)

Hospital wastewater is one of the most dangerous types of pollution that contaminates rivers due to the presence of pharmaceutical compounds and dyes. Antibiotic ciprofloxacin and methylene blue dyes, a hospital wastewater ...
Synthesis of TiO2 Nanotube Arrays by Sonication Aided Anodization and Its Application for Hydrogen Generation from Aqueous Glycerol Solution

Ratnawati, Ratnawati; Gunlazuardi, Jarnuzi; Slamet, Slamet (EDP Sciences, 2015)

The sonication aided anodization in the TiO2 Nanotube Arrays (TNTA) formation and its performance for photocatalytic hydrogen generation from glycerol–water solution (10 v%) has been examined. TNTA were prepared by ...
Effect of Anodization Time and Temperature on the Morphology of TiO2Nanotube Arrays for Photocatalytic Hydrogen Production from Glycerol Solution

Ratnawati, Ratnawati; Gunlazuardi, Jarnuzi; Slamet, Slamet (Proceeding the Regional Conference on Chemical Engineering, 2014-12-02)

Effect of anodization time and temperature on the morphology of TiO2 nanotube arrays (TNTAs) photocatalyst and its application for H2 production from glycerol-water solution has been investigated.The TNTAs were synthesized ...
Adsorption of Phenol and Iron in Wastewater Using a Mixture of Active Carbon and Zeolite Modified with Chitosan

Ratnawati, Ratnawati; R Hidayat; M C Ariwirdana; K Sunandar; Wahyudin, Wahyudin (JURNAL SAINS MATERI INDONESIA (JUSAMI), 2022-10)

Phenol (C6H5OH) and iron (Fe2+) contained in electroplating industrial wastewater are toxic even at small concentrations. One of the effective methods to remove these compounds is adsorption because the method is easy ...
Upaya Penurunan Nilai COD pada Limbah Tekstil dan Batik dengan Penambahan NaOCl

Yoshi, Linda Aliffia; Idat, Jessica Ambarwati; Maulidyananda, Galuh; Ratnawati, Ratnawati (Al-Ard: Jurnal Teknik Lingkungan, 2020-09)

Batik and textile production produces liquid waste with a COD content above the environmental quality standard between 2,000-12,000 ppm. Efforts to reduce the value of COD are helped by the addition of NaOCl. This study ...
THE EFFECT OF MILLING TIME AND PERCENTAGE OF DISPERSING AGENT ON THE CHARACTERISTIC OF SOLVENT-BASED BLACK PAINT FROM CARBON BLACK PIGMENT

Ratnawati, Ratnawati; Noveriarto, Joko; Handayani, Aniek Sri; Purwaningsih, Is S.; Hendrawan, Iyus (Jurnal Sains Materi Indonesia, 2020-07-10)

THE EFFECT OF MILLING TIME AND PERCENTAGE OF DISPERSING AGENT ON THE CHARACTERISTIC OF SOLVENT-BASED BLACK PAINT FROM CARBON BLACK PIGMEN. The need for black paint made from carbon black pigment increasing year by year ...
Zinc Removal from ZnO Industrial Wastewater by Hydroxide Precipitation and Coagulation Methods: The Role of pH and Coagulant Dose

Ratnawati, Ratnawati; Christwardana, Marcelinus (Jurnal Riset Teknologi Pencegahan Pencemaran Industri-BBTPPI, 2020)

Liquid waste from the ZnO industry must be treated to meet the quality standards of wastewater into water bodies, according to the Minister of Environment Regulations No.5, 2014. It still contains 79 mg/L of Zn metal, ...
Pengaruh pH dan Dosis NaOCl terhadap Penurunan Kadar COD dan Klor Bebas pada Pengolahan Limbah Cair

Ratnawati, Ratnawati; Yosh, Linda Aliffia; Wibawa, Surya Aji (Jurnal Rekayasa Kimia dan Lingkungan, 2018-08-18)

Limbah cair dari produksi monomer vinil klorida mengandung Chemical Oxygen Demand (COD) yang tinggi yaitu sekitar 1000 ppm dan Biological Oxygen Demand (BOD) sekitar 500 ppm. Sedangkan nilai standar mutu air buangan ke ...
PENGARUH WAKTU DAN KECEPATAN PENGADUKAN TERHADAP KARAKTERISTIK PRODUK WHITE COLORANT DARI TITANIUM DIOKSIDA

Ratnawati, Ratnawati; Yoshi, Linda Alifia; Zaenal K.; Andri Y. (Jurnal Sains Materi Indonesia, 2018-02-05)

PENGARUH WAKTU DAN KECEPATAN PENGADUKAN TERHADAP KARAKTERISTIK PRODUK WHITE COLORANT DARI TITANIUM DIOKSIDA. White Colorant adalah bahan baku utama dalam proses pembuatan cat di depo yang dibuat dari pigment TiO2 . ...
POTENSI TITANIA NANOTUBE ARRAY DAN APLIKASINYA DALAM PRODUKSI HIDROGEN DAN PENGOLAHAN LIMBAH

Ratnawat, Ratnawat; Slamet, Slamet (Departemen Teknik Kimia, Universitas Indonesia, 2012-10-23)

Titania (TiO2) merupakan salah satu material fotokatalis yang banyak diteliti dewasa ini kerena mempunyai banyak keunggulan dan aplikasi. Secara umum TiO2 masih memiliki kelemahan karena luas permukaannya yang rendah, ...
Degradation of methylene blue-ciprofloxacin and hydrogen production simultaneously using combination of electrocoagulation and photocatalytic process with Fe-TiNTAs

Muttaqin, Raharjo; Pratiwi, Reno; Ratnawati, Ratnawati; Dewi, Eniya L.; Ibadurrohman, M.; Slamet, Slamet (Elsevier Ltd on behalf of Hydrogen Energy Publications LLC, 2022)

The study reported in this paper combines the electrocoagulation and photocatalysis for the simultaneous degradation of methylene blue dyes (MB)-antibiotic ciprofloxacin (CP) and production of hydrogen. The pollutant ...
Photocatalytic Performance of CdS/(Pt-TiO2)-Pumice for E. Coli Disinfection in Drinking Water

Ratnawati, Ratnawati; Hartanto, Singgih; Husnil, Yuli Amalia; Ratri, Christin Rina (Blue Eyes Intelligence Engineering & Sciences Publication, 2020-01)

Photocatalytic removal of E. coli pathogen bacteria existing in drinking water was studied in this paper. CdS/(Pt-TiO2) nanocomposite was produced by depositing Pt/CdS on TiO2 nanoparticles with chemical reduction ...
Effect of NaBF4 addition on the anodic synthesis of TiO2 nanotube arrays photocatalyst for production of hydrogen from glycerolewater solution

Ratnawati, Ratnawati; Gunlazuardi, Jarnuzi (Hydrogen Energy Publications, 2014-09-05)

Addition of NaBF4 during anodic synthesis of TiO2 nanotube arrays (TNTAs) photocatalyst and its application for generating hydrogen from glycerolewater solution has been investigated. The TNTAs were synthesized by anodic ...
Development of titania nanotube arrays: The roles of water content and annealing atmosphere

Ratnawati, Ratnawati; Gunlazuardi, Jarnuzi; Slamet, Slamet (Elsevier, 2015)

The effect of water content in the electrolyte solution during annealing process in the synthesis and modification of titania nanotube arrays (TNTAs) by anodic oxidation process has been investigated. Variations in ...
A Comparative Study of Pt Depositing Methods (Chemical Reduction vs Photo-Assisted Deposition) onto TiO2 Nanoparticles for Hydrogen Photo-Production

Ratnawati, Ratnawati; Slamet, Slamet; Wongso, Viona; Gunlazuardi, Jarnuzi; Ibadurrohman, Muhammad (ITB Institute for Research and Community Services, 2022)

In this paper, we report a comparative study on two methods (chemical reduction and photo-assisted deposition) of incorporating Pt onto TiO2 nanoparticles (TNP) for H2 generation. The phase structure of the photocatalysts was ...
Simultaneous Decolorization of Tartrazine and Production of H2 in a Combined Electrocoagulation and Photocatalytic Processes using CuO-TiO2 Nanotube Arrays: Literature Review and Experiment

Slamet, Slamet; Pelawi, Laily Fitri; Ibadurrohman, Muhammad; Yudianti, Rike; Ratnawati, Ratnawati (Indonesian Journal of Science & Technology, 2022-10-11)

We reported the simultaneous decolorization of tartrazine and H2 production via electrocoagulation and photocatalysis using CuO-doped TiO2 nanotube arrays (TNTA) composites. Tartrazine was removed by the combination ...
Enhancing Hydrogen Generation using CdS-modified TiO2 Nanotube Arrays in 2,4,6-Trichlorophenol as a Hole Scavenger

Ratnawati, Ratnawati; Slamet, Slamet; Toya, Farah Diba; Kuntolaksono, Satrio (Int. Journal of Renewable Energy Development, 2022)

Nowadays, the lack of renewable energy such as hydrogen, and other environmental issues are problems that must be resolved. 2,4,6-Trichlorophenol (2,4,6-TCP) is classified as a recalcitrant pollutant due to its carcinogenic ...
Degradation of Phenol in Pharmaceutical Wastewater using TiO2/Pumice and O3/Active Carbon

Ratnawati, Ratnawati; Enjarlis, Enjarlis; Husnil, Yuli Amalia; Christwardana, Marcelinus; Slamet, Slamet (Bulletin of Chemical Reaction Engineering & Catalysis, 2020)

Phenol is a toxic organic compound that detectable in the pharmaceutical wastewater, and therefore it should be eliminated. This study aims to degrade phenol in the pharmaceutical wastewater treatment using Advanced ...
VISIBLE LIGHT INDUCED PHOTOCATALYSIS ON CDS-MODIFIED TiO2 FOR TEXTILE WASTEWATER TREATMENT

Ratnawati, Ratnawati; Husnil, Yuli Amalia; Hartanto, Singgih; Purwiardi, Ibrahim.I. (International Journal of Advances in Science Engineering and Technology, 2019-10)

- CdS-modified TiO2 (CdS-TiO2) has been studied via hydrothermal method for visible-light-driven textile waste degradation. FESEM, TEM, XRD and UV-Vis DRS were used to characterize the as-prepared samples. The ...

Now showing items 61-80 of 277

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