Analisis Penggunaan Katalis Seng Oksida (ZnO) Pada Proses Fotokatalis Dengan Sinar Uva Untuk Menurunkan Bakteri Escherichia Coli

lkawati, Afida (2007) Analisis Penggunaan Katalis Seng Oksida (ZnO) Pada Proses Fotokatalis Dengan Sinar Uva Untuk Menurunkan Bakteri Escherichia Coli. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bakteri *Escherichia coli* (E. coli) merupakan bioindikator keberadaan mikroorganisme patogen lainnya dan berdasarkan Keputusan Menteri Kesehatan RI No. 907/MENKES/SK/V/2002, nilai konsentrasi *E. coli* dalam air minum harus nihil. Proses desinfeksi dengan klorinasi memiliki efek samping yang dapat membahayakan kesehatan manusia, yaitu terbentuknya trihalometan (THM). Oleh karena itu dikembangkan alternatif pengolahan yang lain, dengan pemaparan sinar ultraviolet dan penambahan fotokatalis ZnO pada sistem pengolahan air minum dengan tujuan mempercepat penurunan jumlah *E. coli* dalam air. Dalam penelitian ini digunakan proses fotokatalis dengan katalis seng oksida (ZnO) menggunakan variasi diameter butiran ZnO dan beban permukaan. Air sampel yang digunakan mengandung *E. coli* yang dilarutkan dalam air pengencer. Waktu pemaparan sinar ultraviolet A yang berasal dari lampu jenis *black light* 20 W selama 65–90 menit dengan diameter butiran 300 µm, 600 µm, 850 µm serta beban permukaan 3,7 cm³/cm².menit; 2,2 cm³/cm².menit; 1,375 cm³/cm².menit. Hasil penelitian menunjukkan bahwa penggunaan sinar ultraviolet dengan penambahan fotokatalis ZnO memengaruhi penurunan *E. coli*. Semakin kecil diameter dan beban permukaan yang digunakan maka semakin besar pula penurunan *E. coli* yang didapat. Berdasarkan penelitian yang telah dilakukan, didapatkan diameter dan beban permukaan yang dapat menurunkan *E. coli* dalam air adalah 300 µm dan 1,375 cm³/cm².menit.
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*Escherichia coli* (E. coli) bacteria is a bioindicator of other pathogenic microorganisms present and based on Keputusan Menteri Kesehatan RI No. 907/MENKES/SK/VII/2002, the concentration of E. coli in drinking water must be zero. Disinfection using chlorine substance produces trihalomethane (THM) and results in a side effect that is harmful to human health. That’s why alternative disinfection methods have been developed, using ultraviolet light and photocatalyst ZnO to increase the reduction of the E. coli concentration in the water. This research has used a photocatalysis process with zinc oxide (ZnO) photocatalyst using the size variation of ZnO catalyst and flow rate variation. The water samples that were used contained E. coli. The time of exposure to ultraviolet light A, with the power of the black light lamp being 20 watts, was between 65–90 minutes. The size variations are 300 µm, 600 µm, 850 µm and flow rate variations are 3.7 cm³/cm².minute; 2.2 cm³/cm².minute; 1.375 cm³/cm².minute. The result of the research showed that the use of an ultraviolet lamp with the addition of catalyst ZnO influenced the reduction of E. coli. The higher result of the E. coli reduction is affected by the smaller size of catalyst ZnO and higher flow rate. The conclusion based on this research is the highest reduction of E. coli at a size of 300 µm of catalyst ZnO and a flow rate of 1.375 cm³/cm².

Item Type:	Thesis (Other)
Additional Information:	RSL 628.166 Ika a
Uncontrolled Keywords:	E. coli, fotokatalis, sinar ultraviolet, seng oksida, E. col~ photocatalyst, uhraviolet light, zinc oxide.
Subjects:	Q Science > QD Chemistry > QD716 Photocatalysis. T Technology > TD Environmental technology. Sanitary engineering > TD430 Water--Purification.
Divisions:	Faculty of Civil Engineering and Planning > Environment Engineering > 25201-(S1) Undergraduate Thesis
Depositing User:	magang .
Date Deposited:	23 Oct 2026 04:11
Last Modified:	23 Oct 2026 04:11
URI:	http://repository.its.ac.id/id/eprint/145821

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