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Transpor Ion Logam Cu(II) Menggunakan Minyak Kelapa (Cocos nucifera L.) Sebagai Membran Cair Melalui Teknik Membran Cair Fasa Ruah Refinel; Olly Norita, Tetra; Shofiyah , Anwar
Jurnal Kimia Unand Vol. 13 No. 2 (2024): November 2024
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.13.2.1-7.2024

Abstract

Increasing industrial activities throughout the world produce a large amount of waste, including materials that contain heavy metal ions. One of the heavy metals found in industrial waste is copper ion Cu(II). Liquid membrane technology using vegetable oil as the membrane phase can be an environmentally friendly alternative metal transportation process. Transport of Cu(II) ions was carried out using bulk li-quid membrane technology using coconut oil as the phase membrane. According to the Minister of Health Regulation No. 492/menkes/per/IV/2010 concerning Drinking Water Quality Requirements, the threshold limit of Cu(II) ions in waters is 2 mg/L. Many ways have been done to separate heavy metal ions from this industrial waste. In this study, the transport of Cu(II) ions through coconut oil membrane and as the receiving phase of ethylenediaminetetraacetic (EDTA) has been carried out. The optimization results obtained, namely the source phase of Cu(II) metal ions pH 4 with a concentration of 3.147 x 10-4 M, the receiving phase of EDTA solution pH 7 with a concentration of 0.06 M, 200 rpm stirring speed, obtained the transport of Cu(II) metal ions to the receiving phase, namely, 23.44% with a transport time of 1 hour. Furthermore, the test was carried out with the same optimum conditions using HCl as the receiving phase, and the percentage value of Cu(II) metal ions in the receiving phase was 25%, from using the EDTA receiving phase.
Transpor Cd(II) Menggunakan Membran Cair Minyak Jagung Dengan Teknik Membran Cair Fasa Ruah Refinel; Olly Norita Tetra; Mega Silvia
Jurnal Kimia Unand Vol. 12 No. 1 (2023): May 2023
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.12.1.14-18.2023

Abstract

The transport of Cd(II) has been carried out by means of a bulk phase liquid membrane technique with vegetable oil as an environmentally friendly membrane phase. The transport process consisted of 65 mL of Cd(II) solution as the source phase, 50 mL of corn oil as the membrane phase and 120 mL of EDTA solution as the receiving phase. The experimental technique used a magnetic stirrer at a speed of 200 rpm with an equilibrium time of 15 minutes. The concentration of Cd(II) transported to the source and receiving phase was determined by Atomic Absorption Spectroscopy(AAS) at a wavelength of 228.63 nm. It was found that the optimum conditions for Cd(II) transport were at a concentration of 2.8 ppm with pH 6 as the source phase, EDTA concentration of 0.05 M with pH 4 as the receiving phase, stirring speed of 200 rpm, transport time of 120 minutes and equilibrium time of 15 minutes, the amount of Cd(II) transported to the receiving phase reached 19.37% while the remaining in the source phase was 38.54%.
Optimalisasi Proses Transportasi Anilin Menggunakan Membran Minyak Nabati dalam Teknik Membran Cair Refinel; Emil Salim; Ikhsan Gusti Rilma
Jurnal Kimia Unand Vol. 12 No. 2 (2023): November 2023
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.12.2.13-18.2023

Abstract

Aniline transport using a supported liquid membrane technique has been carried out in the separation of aniline from aqueous solutions. The aniline transport process used vegetable oil as a liquid membrane and ceramics as a support material. The concentration aniline was determined using an UltraViolet-Visible (UV-Vis) Spectrophotometer at a wavelength of 230 nm. Optimal conditions found that a good type of liquid membrane was olive oil, a pH value of 3 in the source phase, the concentration of aniline 12 x 10-5 M, the concentration of HCl 1.0 M, and a stirring time of 90 minutes. Under optimum conditions, the percentage of aniline in the receiving phase was 36.19% and source phase was 1.48%. HCl is not able to attract all the molecules that are in the membrane phase. The receiving compound which has a strong affinity will provide a large amount of transport for the aniline transport process.
Electrocoagulation of Rhodamine B Dye Using Zinc Electrodes Refinel; Sari, Berliana Mayang; Emriadi
Jurnal Kimia Unand Vol. 14 No. 2 (2025): November 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.2.32-35.2025

Abstract

The textile wastewater containing Rhodamine B is difficult to degrade naturally and poses serious environmental threats. This study evaluated the effectiveness of electrocoagulation using zinc electrodes for Rhodamine B removal. Variables analyzed were concentration, pH, time, voltage, and electrode distance. Removal efficiency was measured using UV-Vis spectrophotometry at λ 545 nm, while FTIR characterization confirmed molecular changes. The optimum condition was obtained at 75 min, pH 6, 5 V, and 1 cm electrode distance, resulting in 98.68 % removal efficiency. FTIR spectra supported the successful removal of Rhodamine B. This demonstrates that electrocoagulation with zinc electrodes is an effective and eco-friendly method for textile wastewater treatment.
Co-Authors Emil Salim Emriadi Ikhsan Gusti Rilma Mega Silvia Olly Norita Tetra Olly Norita, Tetra Sari, Berliana Mayang Shofiyah , Anwar