Kinetics and mechanisms of UV-photodegradation of chlorinated organics in the gas phase

Evaluation of a solar/UV annular pilot scale reactor for 24h continuous photocatalytic oxidation of n-decane

“…Photocatalytic oxidation processes (PCO) have been proven to be very promising for the purification of air from trace amounts of volatile organic compounds (VOCs) when compared to conventional techniques (e.g., adsorption or air stripping processes) [1][2][3][4]. It provides three significant advantages: low operation temperature, chemical additives-free, and oxidation into innocuous or easily neutralized by-products (usually CO 2 , H 2 O, and mineral acids) [1][2][3][4].…”

“…It provides three significant advantages: low operation temperature, chemical additives-free, and oxidation into innocuous or easily neutralized by-products (usually CO 2 , H 2 O, and mineral acids) [1][2][3][4]. In 1997, the Air Pollution Prevention and Control Division of the National Risk Management Research Laboratory of the U.S. Environmental Protection Agency (EPA) reported the cost effectiveness of PCO as an air cleaner technology [5].…”

“…Although there is already a wide range of research studies related to the possibility of using sunlight on the gas-phase degradation of VOCs, almost all are meant for the photodegradation assessment of pure-targeted VOCs in small lab-scale devices [1][2][3]. Furthermore, the little experimentation performed in pilot plants has up to now been one of the main reasons for the absence of real applications in this field.…”

Photodegradation of chloroform in aqueous solution: Impact of montmorillonite KSF particles

“…2, in the absence of KSF the degradation of chloroform under UV irradiation is negligible. This indicates that chloroform cannot be degraded by direct photolysis under irradiation at 365 nm [16]. In the presence of KSF, the degradation of chloroform in the dark control up to 10 h was negligible, while the photodegradation efficiency of chloroform was 54% after 10 h of irradiation.…”

Contaminação de águas por BTXs e processos utilizados na remediação de sítios contaminados

“…Em geral, a fotodegradação em fase gasosa é mais atrativa que em fase líquida, devido à baixa absorção UV pelo ar, à presença de oxigênio e à ausência de seqüestradores de radicais, como os íons carbonato e bicarbonato 47 . Wang et al 48 avaliaram a eficiência da luz ultravioleta e do processo UV/H 2 O 2 na degradação de poluentes orgânicos em efluentes.…”