A novel and effective system was developed for the complete treatment of NOx from flue gases. The system consisted of photocatalytic or ozone oxidation of NOx, followed by scrubbing and biological denitrification. Maximum photocatalytic oxidation of NOx was achieved while using powdered TiO2 at a catalytic loading rate of 10 g/h, relative humidity of 50%, and a space time of 10 s. The used cata...

The broad-ranging provisions in Title IV of The Clean Air Act Amendments of 1990 (P.L. 101-549) raise myriad implementation issues, particularly with respect to the system of tradeable "allowances." This system provides an economic mechanism by which emitters of sulfur dioxide (SO2) can determine the most cost-effective way to meet reduction requirements. Issues include the role of States, part...

AERMOD was used to model the air dispersion of point and major line emissions of PM2.5 in Halifax and Pictou, NOX in Halifax and SO2 in Halifax, Sydney and Port Hawkesbury, Nova Scotia, Canada. Emission inventory data for 2004 were used in simulations within four, 50 km x 50 km, domains over annual, monthly and 1–hour averaging periods. Annual averaged surface concentration maps are reported...

On the basis of the reported air quality index (API) and air pollutant monitoring data provided by the Guangzhou Environment Monitoring Stations over the last twenty-five years, the characteristics of air quality, prominent pollutants, and variation of the average annual concentrations of SO2, NO2, total suspended particulate (TSP), fine particulates (PM10), CO and dustfall in Guangzhou City we...

An ab initio study of the adsorption processes on NOx compounds on (110) SnO2 surface is presented with the aim of providing theoretical hints for the development of improved NOx gas sensors. From first principles calculations (DFT-GGA approximation), the most relevant NO and NO2 adsorption processes are analyzed by means of the estimation of their adsorption energies. The resulting values and ...

The aim of this study is to examine levels, temporal changes and interactions major air pollutants with meteorological variables in Ankara, Turkey. level namely PM10, PM2.5, SO2, NO, NO2, NOX, O3, CO was evaluated monthly, seasonally, annually during 2019. statistical relationship between ambient temperature, relative humidity pressure examined discussed. concentrations started rise the morning...

Air dispersion modeling system (ADMS)-urban was used as air dispersion tool to model the atmospheric pollutants composition over Lagos air shed. The model runs with single point source showing the variation of concentrations of air pollutants (NO2, NOx, O3, and SO2) with ambient air dispersion over the city of Lagos, Nigeria. This city is located in the coastal area, and is highly congested wit...

Problem statement: The reduction in ambient air pollution is a universal goal-particularly in urban areas, the lack of resources often necessitates identification and prioritization of sources of air pollutants. Efficient planning and effective management of environmental pollutants is thus important for optimum utilization of limited resources. Approach: This study examined seven years of data...

Estimates of Asian emissions of air pollutants and carbonaceous aerosols and their mid-term projections have been changing significantly in the last years. The remote sensing community has shown that increase in NOx in Central East Asia is much stronger than any of the emission inventories or projections indicated so far. A number of studies reviewing older estimates appeared. Here, we review t...