THE DEVELOPMENT OF ENVIRONMENTALLY FRIENDLY PAVEMENT USING TITANIUM DIOXIDE (TiO2) FOR REDUCTION OF NITROGEN OXIDES GAS (NOx)

• Main Author: Made Bayu, I
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/32083
• Institution: Institut Teknologi Bandung

<p align="justify">Motor vehicle emissions such as nitrogen oxides (NOx) include nitric oxide (NO) and nitrogen dioxide (NO2) are important air pollutants, because its have significant harm to human health and play an important role of being precursor of another dangerous pollutants such as formation of photochemical smog. The photocatalytic process using ultraviolet (UV) light and semiconductor particles is a promising alternative of NOx abatement. Pavement coated titanium dioxide (TiO2) anatase with content pure of 98.82% at 0.02 g/cm2 in the photoreactor exposed to UV light intensity 52.2 ?W/cm² which flowed NOx at concentration of 534.754 ?g/m3- 1224.641 ?g/m3 within 6 hours, 12 hours, 18 hours and 24 hours. Nitrate ion (NO3 -) and nitrite ion (NO3 -) are formed by the photocatalytic pavement surface which is diluted with distilled water then measured by ion chromatography. The rate average value of nitrate and nitrite formation on the first exposure amounted to 0.341 mg/m2/jam while the second exposure was 0.317 mg/m2/jam . In general , the regeneration has a positive impact due to the second exposure still has nitrate and nitrite as result of photocatalytic processes which numbers are not too much different. This indicates that after regeneration , TiO2 particles can return to work despite the photocatalytic effect caused not better than exposure I.<p align="justify">