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All Journal VALENSI Jurnal Penelitian Hasil Hutan ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Penelitian Hasil Hutan Helium: Journal of Science and Applied Chemistry
Ani Iryani
Universitas Pakuan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Energy Environmental Science Materials Science & Nanotechnology

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Journal : VALENSI

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Photocatalytic Degradation of Paraquat Dichloride using TiO2-Fe Nano Powder under Visible and Sunlight Irradiation Linda J Kusumawardani; Yulian Syahputri; Ani Iryani
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 6, No. 1, May 2020
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1011.355 KB) | DOI: 10.15408/jkv.v6i1.13625

Abstract

Paraquat dichloride, is an active herbicide with the chemical formula [(C6H7N2)]Cl2, and in the last decade became the most widely used agricultural pesticide in Indonesia. It has an important role in oil palm plantations but recently appeared many problems and caused environmental pollution. In this research, the photodegradation of paraquat herbicide using TiO2-Fe nanopowder was investigated. The TiO2-Fe catalyst was prepared by the sol-gel method and characterized using XRD and DRS. The characterization results showed that Fe as a dopant on TiO2 produced a small crystal size. This condition can increase the performance of photocatalysis from the area of UV to visible light. Degradation of paraquat dichloride is carried out under visible and sunlight irradiation to significantly increase photocatalytic activity. Decreasing of paraquat content was observed for every 15 minutes and measured by spectrophotometer UV-Vis. The addition of 0.5 gram of TiO2-Fe catalyst to 50 mL of sample solution increased the degradation percent by 98.4% for 75 minutes with a concentration of Fe3+ 10% (w/w). These results indicate that the presence of Fe dopants on TiO2 can increase the photocatalytic activity of nano TiO2 particles from UV light to visible light.
Photocatalytic Degradation of Phenol Using TiO2-Fe Under H2O2 Presence by Visible and Sunlight Irradiation Linda J Kusumawardani; Ani Iryani
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 2, November 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i2.20766

Abstract

Phenol is one of the essential organic pollutants released into the environment because of its high stability and toxicity. It is harmful to organisms, environment, and posing a serious threat to human health at low concentration. This research investigated the photocatalytic degradation process of phenol using a TiO2-Fe catalyst under visible light irradiation and additional H2O2. The effect of various conditions process was applied, including different catalyst doses (0.2, 0.4, 0.6, and 0.8 g/L), pH (3, 6, 8, and 11), irradiation times (60, 90, 120, 150, and 210 minutes) and the presence of H2O2. The degradation process was studied at an initial concentration of phenol 5 mg/L. This study has been decreasing phenol content (90.51%) with catalyst doses 0.6 g/ L sample solution, pH solution 11, reaction time 210 minutes and H2O2 concentration 30%. This final phenol concentration after photodegradation under halogen light was 0.18 mg/L, while sunlight irradiation was 0.11 mg/L. This result is below government regulation as per Permen LH RI No. 5/2014 i.e. 0.5 mg/L. Therefore, this process possible to remove phenol in aqueous such as industrial wastewater or other resources.
Co-Authors Afifah Nur Ismawati Agus Taufiq Angelica Paramasari Cellia Christiana Batubara Dessy Nur Indryastuti Diana Widiastuti Dimas Apryandi Darma Putra Djoko Hartanto Esya Juniar Hadi Nur Hery Widijanto Intan Wulandari Linda Jati Kusumawadani Linda Jati Kusumawardani Lisna Efiyanti Mardi Santoso Muhammad Fathurrahman Muhammad Fathurrahman Nela Rahmatisari Novitri Hastuti Poedji Hastuti Sherin Nurhafidza Ahmad Shinta Safitri Siti Kholisoh Siti Warnasih Sutanto Sutanto Usep Suhendar Uswatun Hasanah Yulian Syahputri