The Use of Rice Husk Silica in Modified Zinc Oxide Photocatalysts to Reduce Chromium Concentration
Abstract
Rice husk ash contains approximately 90-98% dry weight of silica and they have been reported to have several advantages compared to mineral silica. One of these is its application as a filler in ZnO photocatalysts using the sol-gel method. This study was, therefore, conducted to determine the effect of adding rice husk silica to increase the ability of ZnO/SiO2 photocatalyst to reduce chromium concentration. Meanwhile, a previous effort has been made to degrade methylene blue dyes by 89%. This current research involved preparing rice husk charcoal using pyrolysis tubes after which they were extracted to produce silica while ZnO/SiO2 composites were made at a 95/5, 90/10, and 85/15 (w/w) ratio and composite activity test was conducted to determine its ability to reduce chromium concentration from practicum discharge. The SEM-EDS results showed the formation of SiO2 composites in ZnO while 82.6% decrease in total chromium concentration from waste was obtained after 2 hours irradiation with 95/5 composites using ultraviolet radiation.
Keywords
References
Eddy DR, Na’ani LA, Rustaman, Solihudin. 2019. Fotokatalisis komposit silika sekam padi modifikasi seng oksida untuk menurunkan konsentrasi kromium(VI). Chimica et Natura Acta. 7(3): 132-137.
Eddy DR, Noviyanti AR, Solihudin, Ishmayana S, Tjokronegoro R. 2018, Rice Husk for Photocatalytic Composite Material Fabrication, Book title: Visible-Light Photocatalysis of Carbon-based Materials. ISBN 978-953-51-5612-3.19-28.
Fatimah S, Haris A. 2014. Pengaruh dopan zink oksida pada TiO2 terhadap penurunan kadar limbah fenol dan Cr(VI) secara simultan dengan metode fotokatalisis. Jurnal Kimia Sains dan Aplikasi. 17(3): 86–89.
Guisnet M, Gilson JP. 2002. Zeolites for Cleaner Technologies. London(UK): Imperial College Press.
Handayani PA, Nurjanah E, Rengga WDP. 2015. Pemanfaatan limbah sekam padi menjadi silika gel. Jurnal Bahan Alam Terbarukan. 4(2): 55-59.
Ismunadji M. 1998. Padi. Buku Edisi I. Bogor (ID): Badan Penelitian dan Pengembangan Pertanian, Bogor.
Naimah S, Ermawati, R. 2011. Efektifitas fotokatalis nano TiO2 yang dikompositkan dengan material karbon aktif dan precipitated calcium carbonat dalam menurunkan logam chrom dari limbah industri elektroplating. Jurnal Sains Materi Indonesia Indonesian Journal of Materials Science. 14(1): 17 – 21.
Putro AL, Prasetyoko D. 2007. Abu sekam padi sebagai sumber silika pada sintesis zeolit ZMS-% tanpa menggunakan templat organik. Akta Kimindo. 1: 33-36.
Rakhmawaty D, Ernawati EE, Noviyanti AR, Lubis RA, Tjokronegoro R. 2016. Pembuatan fotokatalis seng oksida termodifikasi silika sekam padi. Jurnal Material dan Energi Indonesia. 6(2): 18–23.
Riyani K, Setyaningtyas T, Soleh A. 2016. Fotoreduksi logam krom(VI) menggunakan fotokatalis lapis tipis TiO2-MM mesopori dengan bantuan lampu tungsten. Prosiding Seminar Nasional Teknik Kimia “Kejuangan” ISSN 1693-4393: 1-5.
Slamet, Syakur R, Danumulyo W. 2003. Pengolahan limbah logam berat chromium(VI) dengan fotokatalis TiO2. Makara Teknologi. 7(1): 27-32.
Soeswanto B, Lintang N. 2011. Pemanfaatan limbah abu sekam padi menjadi natrium silikat. Jurnal Fluida. 7(1): 18-22.
Soltani RDC, Khoramabadi GS, Godini H, Noorimotlagh Z. 2015. The application of ZnO/SiO2 nanocomposite for the photocatalytic degradation of a textile dye in aqueous solutions incomparison with pure ZnO nanoparticles. Desalination and Water Treatment. 56(9): 2551-2558.
DOI: 10.15408/jkv.v6i1.12324
Refbacks
- There are currently no refbacks.
Copyright (c) 2020 Diana Rakhmawaty Eddy
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
