The presence of nondegradable organic compounds and xenobiotic chemicals in water is a great concern for the general public\nbecause of their polar properties and toxicity. For instance, trichloroethylene (TCE) is a widely used solvent in the chemical\nindustry, and it is also a contaminant of soil, surface water, and groundwater. Recent studies on new treatment technologies have\nshown that photocatalyst-based advanced oxidation processes are appropriate for removing these polar and toxic compounds from\nwater. The objective of this study was to remove TCE from water using novel nano-ZnO-laponite porous balls prepared from\nphotocatalyst ZnO with nanoscale laponite. These nano-ZnO-laponite porous balls have a porosity of approximately 20%. A lower\ninitial concentration of TCE resulted in high removal efficiency. Moreover, the removal efficiency increased with increasing pH\nin the photocatalytic degradation experiments employing UVC light with nano-ZnO-laponite. The optimal dosage of nano-ZnOlaponite\nwas 30 g and the use of UVC light resulted in a higher removal efficiency than that achieved with UVA light. In addition,\nthe removal efficiency of TCE significantly increased with increasing light intensity.We think that TCE�s removal in water by using\nporous ball of nano-ZnO and nanoclay composite is a result of degradation from hydroxide by photons of nano-ZnO and physical\nabsorption in nanoclay.
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