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Similarity - Development of titania nanotube arrays: The roles of water content and annealing atmosphere

Ratnawati, Ratnawati (2023-02-06)

Ratnawati, Ratnawati (2023-02-05)

Similarity - Degradation of Phenol in Pharmaceutical Wastewater using TiO2/Pumice and O3/Active Carbo

Ratnawati, Ratnawati (2023-02-03)

Similarity - VISIBLE LIGHT INDUCED PHOTOCATALYSIS ON CDSMODIFIED TiO2 FOR TEXTILE WASTEWATER TREATMENT

Ratnawati, Ratnawati (2023-02-03)

SYNTHESIS CDS/PT-TI02 WITH ENHANCED ITS PERFORMANCE FOR PHOTOCATALYTIC DEGRADATION OF PALM WASTEWATER TREATMENT

Ratnawati, Ratnawati (NOVA, 2020)

Combination of Ozonation and Photocatalysis for Pharmaceutical Wastewater Treatment

Ratnawati, Ratnawati; Enjarlis, Enjarlis; Slamet, Slamet (AIP Publishing, 2017)

The chemical oxygen demand (COD) and phenol removal from pharmaceutical wastewater were investigated using configuration of two circulation batch reactors in a series with ozonation and photocatalytic processes. The ...

Photocatalytic Decomposition of Glycerol Solution on TiO2 Nanotube Arrays (TNTA) doped with C and N to Produce Hydrogen

Ratnawati, Ratnawati; Gunlazuardi, Jarnuzi; Slamet, Slamet (Trans Tech Publications, 2017)

Carbon and Nitrogen-doped TNTA were synthesized by in-situ anodic oxidation of Ti using glycerol containing NH4F followed by annealing with 20% H2/Argon at 500 oC. Variation water content in the electrolyte solution (25 ...

Pengaruh Proses Ozonasi, Adsorpsi don Advance Oxidation Process (O3/GAC dqn O3/H2O2) Pada Pengolahan Limbah lndustri Farmasi

Enjarlis, Enjarlis; Ratnawati, Ratnawati; Slamet, Slamet (APTEKINDO, 2015)

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, ...

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