Pengaruh Ion Hg(II) Terhadap Efektivitas Fotoreduksi Ion Cu(II) Terkatalisis TiO2 dalam Limbah Cair Industri Kerajinan Perak di Desa Ungga Kec. Praya Lombok Tengah

Husnul Hatimah

Abstract


In this study a study of the effect of TiO2 photocatalysts and Hg (II) ions in the
wastewater of the silver industry in Ungga Village, Kec. PrayaKab. Central
Lombok to the effectiveness of Cu (II) photoreduction which is catalyzed by
TiO2. The photoreduction process is carried out by irradiating liquid waste
containing Cu (II) and Hg (II) ions without or by adding TiO2 photocatalyst
powder in a closed reactor equipped with UV light. The condition of the
photoreduction process is 50 mL of silver waste containing Cu (II) and Hg (II)
with a reaction time of 24 hours and a mass of TiO2 20 mg at 10 ppm Cu (II) ion
concentration. Photoreduction results are determined based on the difference in
the concentration of Cu (II) ions with the concentration of residual Cu (II) ions
in silver waste without the addition of TiO2 photocatalysts. Furthermore, the
data obtained compared to the results of Cu (II) photoreduction catalyzed by
pure TiO2 laboratory scale. The amount of metal in the mixture was determined
by the Atomic Absorption Spectrophotometry (AAS) method. The results showed
that in silver handicrafts containing Cu (II) and Hg (II) ions the addition of TiO2
can increase the effectiveness of Cu (II) photoreduction from 6.57% to 33.38%,
which begins with the adsorption process. Hg (II) in silver handicraft waste
causes inter-metal reduction competition so that it can reduce the effectiveness of
Cu (II) ion photoreduction catalyzed by TiO2 by 9.84% when compared to the
percentage of Cu (II) ion Ti2O scale scale laboratory testing.

Keywords


Cu (II), Hg (II), Photoreduction, TiO2

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DOI: https://doi.org/10.33394/hjkk.v6i1.1602

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