DEGRADATION OF HUMIC ACID BY FLOATING PHOTOCATALYST TiO2/Cu-ARECA FIBER
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The photocatalyst method is effective in degrading humic acid into O2 and H2 compounds
that are more environmentally friendly. The photocatalysis process involves light and
semiconductors such as TiO2 to accelerate the reaction rate. Therefore, modification of TiO2
is needed to shift light absorption to visible light by using Cu2+ doping and areca fiber. XRD
characterization shows that Merck's TiO2 has shifted at 2θ, indicating that Cu has entered
the TiO2 structure, and several peaks have reduced in intensity after being embedded with
areca fiber, indicating that TiO2/Cu has successfully attached to areca fiber. FTIR results
show that TiO2/Cu has been attached to the areca fiber, which is marked by shifting and
weakening the intensity of the Ti-O-Cu wave number absorption. The test results show that
TiO2/Cu embedded in areca fiber had higher degradation activity than TiO2/Cu without
embedded, with a percent degradation of 54% for 180 minutes of irradiation. These results
prove that TiO2/Cu floated to the surface of the solution can optimize irradiation so that it
is effective in the degradation process.
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