ABSTRACT
Nowadays, the increased agro-industrial activities and the inability of traditional wastewater treatment plants (WWTPs) to eliminate recalcitrant organic contaminants are raising a potential worldwide risk for the environment. Among the various advanced water treatment technologies that are lately proposed for addressing this challenge, the development and optimization of an innovative hybrid photocatalytic nanofiltration reactor (PNFR) prototype emerges as a prominent solution that achieves synergistic beneficial effects between the photocatalytic degradation activity and size exclusion capacity for micropollutant molecules. Both these features can be contemporarily endued to a multitude of membrane monoliths. The physicochemical and the photoinduced decontamination properties of the titania materials were firstly determined in the powder form, and subsequently, the structural and morphological characterization of the obtained titania-modified membrane monoliths were accomplished. The PNFR unit can operate at high water recovery and low pressures, exhibiting promising removal efficiencies against Acetamiprid (ACT) and Thiabendazole (TBZ) pesticides and achieving the recycling of 15 m3/day of real agro-wastewater. The obtained results are very encouraging, demonstrating the integration of titania photocatalysts in a photocatalytic membrane reactor as a feasible technological solution for the purification of agricultural wastewater.
ABSTRACT
Se determinó la frecuencia de infección por Chlamydia trachomatis (Ct) y los factores asociados a la infección en 100 mujeres, que acudieron a pesquisa de cáncer de cuello uterino en la Clínica de la Sociedad Anticancerosa de Maracay de Abril a Junio de 2008. La muestra de hisopado endocervical se analizó mediante reacción en cadena de la polimerasa para Ct y Neisseria gonorrohoeae (Ng). Se identificó ADN de Ct en 18% de las mujeres no se detectó ADN de Ng en ninguna de ellas. Entre los factores asociados a la infección sólo se encontró significación estadística entre la infección por Ct y episodios previos de infecciones del tracto urogenital, no se halló relación entre la infección por Ct y el resultado de la citología cervical. La frecuencia de Ct es elevada en relación con la población estudiada, adicionalmente, los resultados sugieren la necesidad de revisar las actividades orientadas a educar acerca de las medidas preventivas de las Infecciones de Transmisión Sexual.
The frequency of infection was determined by Chlamydia trachomatis (Ct) and associated factors in 100 women, whom underwent a search of cervical uterine cancer in the Clinic Anticancer Society of Maracay from Abril to June of 2008. Specimens were collected by endocervical swab. Ct and Neisseria gonorrhoeae (Ng) were tested by Polymerase Reaction Chain (PCR). Ct DNA was found in18% of the women, Ng DNA was not detected any of them, among associated factors to Ct infection only was statistical significant previously episodes of urogenital infections, was not relation between Ct infection and cervical cytology result. The frequency of Ct was elevated in relation to the studied population, additionally; the results suggest the necessity to review the oriented activities to educate about the preventive measures of Sexually Transmitted Infections.
