11 results for "Tifa Paramitha"

The Effect of Concentration of Citric Acid Solution on Extraction of Pectin from Watermelon Albedo

Tifa Paramitha; Tika Paramitha

Kovalen: Jurnal Riset Kimia, Vol. 7 No. 3 · 2021 · Indonesian · DOAJ

Watermelon albedo or the white flesh of watermelon rind contains pectin with high enough content. In this study was conducted the extraction of pectin from watermelon albedo by the liquid-solid extraction method. The citric acid solution was used as a solvent with concentrations varied by 4%, 7%…

Pengaruh Waktu Hidrotermal terhadap Karakteristik Zeolite Socony Mobile-5 (ZSM-5) Tanpa Template Menggunakan Reaktor Autoclave

Mukhtar Ghozali; Gamaliel Tanaka; Muhammad Misbahussalam et al.

Kovalen: Jurnal Riset Kimia, Vol. 7 No. 3 · 2021 · Indonesian · DOAJ

ZSM-5 is a synthetic zeolite which has a complex production process and is affected by operating conditions, such as temperature and time. In this study, synthesized ZSM-5 without template by hydrothermal method. An autoclave reactor was used for the hydrothermal process. The aim of this study was…

Sintesis dan Karakterisasi Semikonduktor TiO2 Doping Magnesium dengan Metode Hidrotermal

Tika Paramitha; Khoirunnisa Utami; Yuki Martha Anggraini et al.

Kovalen: Jurnal Riset Kimia, Vol. 9 No. 1 · 2023 · Indonesian · DOAJ

Semiconductors are materials that range between insulators and conductors in terms of conductivity value. Titanium Dioxide (TiO2) is a semiconductor that is widely applied to various things. TiO2 has the benefits, such as being environmentally stable and inexpensive. TiO2 is photoactive in the…

Tofu Liquid Waste Treatment Using Effective Volume of Anaerobic Sequencing Batch Reactor (ASBR)

Herawati Budiastuti; Anissa Nurul Rachmawati; Delliana Agustin et al.

Kovalen: Jurnal Riset Kimia, Vol. 10 No. 1 · 2024 · Indonesian · DOAJ

The tofu industry produces liquid waste containing high organic compounds. Organic compounds in liquid waste can threaten aquatic ecosystems if discharged directly into water bodies. One of the most effective wastewater treatment systems is the treatment using Anaerobic Sequencing Batch Reactor…

Utilization of Natural Zeolite Impregnated with Fe for Decolorization of Methylene Blue

Tifa Paramitha; Bunga Aulia; Tarisha Aulia Azzahra et al.

Indonesian Journal of Chemical Research, Vol. 13 No. 3 · 2026 · English · DOAJ

Wastewater containing methylene blue, discharged into rivers, significantly impacts water quality due to its resistance to natural degradation. This study investigated the treatment of methylene blue using the photo-Fenton method, employing UV light to generate hydroxyl radicals (•OH) through the…

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Delaminasi Perekat Polivinil Asetat Berbasis Air Satu Komponen untuk Aplikasi Kayu Keras Ulin dan Merbau

Retno Indarti; Agustinus Ngatin; Robby Sudarman et al.

Kovalen: Jurnal Riset Kimia, Vol. 8 No. 2 · 2022 · Indonesian · DOAJ

Water-based adhesive was one of the most important media for bonding substrates to one another because of their environmental friendly character. Previously, in the application of hardwood adhesives such as Ulin and Merbau, the type of adhesive used was a two-component system. For this reason, a…

Studi Awal Sintesis ZnO/SiO2 dengan Silika dari Limbah Padat Geothermal dan Uji Performansinya dalam Penghilangan Metilen Biru

Tifa Paramitha; Joko Suryadi; Rahma Ardelia Raissa et al.

Kovalen: Jurnal Riset Kimia, Vol. 9 No. 3 · 2023 · Indonesian · DOAJ

Industrial development impacts environmental problems, such as the emergence of wastewater containing methylene blue. In this research, SiO2 was composited with ZnO to remove methylene blue. The steps of this study include SiO2 extraction from geothermal solid waste, ZnO/SiO2 synthesis, and…

Evaluasi dan Modifikasi Alat Penukar Ion dengan Penambahan Kolom Adsorpsi Karbon Aktif untuk Menurunkan Kesadahan

Endang Kusumawati; Retno Dwi Jayanti; Lestari Herlianti Putri et al.

Kovalen: Jurnal Riset Kimia, Vol. 10 No. 1 · 2024 · Indonesian · DOAJ

Ion exchange is one of the water treatment methods used to reduce hardness. To improve the performance of the ion exchange columns, modification can be done by adding an activated carbon column placed after the ion exchange column to adsorb ions that were not exchanged by the resin so that the…

KARAKTERISASI SILIKA DARI ABU AMPAS TEBU

Tifa Paramitha; Tri Reksa Saputra; Amelia Nur Aliah et al.

Kovalen: Jurnal Riset Kimia, Vol. 5 No. 3 · 2019 · Indonesian · DOAJ

Silica has been successfully extracted from sugarcane bagasse ash by using alkali method. Extraction was carried out using sodium hydroxide solution to obtain sodium silicate solution and solid residue. Then, hydrochloric acid solution was added to sodium silicate solution until pH of solution was…

The Effect of Solvent-to-Coffee Ratio on Caffeine Content in Ethyl Acetate Extracts of Arabica Gayo Coffee Beans

Bambang Soeswanto; Rony Pasonang Sihombing; Joko Suryadi et al.

Kovalen: Jurnal Riset Kimia, Vol. 9 No. 3 · 2023 · Indonesian · DOAJ

This paper studies the optimal ratio that gives the highest caffeine amount and improves the efficiency and quality of extraction from Arabica Gayo coffee beans. No previous studies have explored the best ratio of Gayo Arabica coffee beans to ethyl acetate solvent for extracting caffeine. The paper…