the effect of hydraulic retention time in a range from 1.0-5.5 days was evaluated in a laboratoryscaleanaerobic fixed bed reactor packed with a hybrid material composed of tire rubber and zeolite. underthese conditions, cod removal efficiencies varied from 28.3% to 82.1%, respectively. over the more than 6months of operation, no clogging was observed. the results obtained demonstrated that this...

the main objective of a research program, whose output is presented here, has been to estimate “ventilation coefficients”, a critical parameter in determining air pollution concentration near the surface ground which signifies the ability for natural ventilation of an air shed in an urban or rural area. relevant measured data from the city of tehran has been used to calibrate and further de...

Poverty and lack of development are critical contributing factors to environmental hazards that affect the health of many hundreds of millions of people worldwide, particularly at the household level. Too often in too much of the world, however, the industrial and commercial development that helps reduce poverty has resulted in ambient environmental degradation and threats to human health as we...

the effect of hydraulic retention time in a range from 1.0-5.5 days was evaluated in a laboratoryscaleanaerobic fixed bed reactor packed with a hybrid material composed of tire rubber and zeolite. underthese conditions, cod removal efficiencies varied from 28.3% to 82.1%, respectively. over the more than 6months of operation, no clogging was observed. the results obtained demonstrated that this...

the current study reports some interesting growth of novel in2o3 nanostructures using ambient-controlled chemical vapor deposition technique in the presence of a strongly reducing hydrazine ambient. the experiments are systematically carried out by keeping either of the carrier gas flow rate or the source temperature constant, and varying the other. for each of the depositions, the growth is st...

We consider an inspection game between an arbitrary number of polluting rms and an agency who can choose to monitor ambient pollution. We obtain an equilibrium where all rms comply with the same probability and where the inspection agency inspects all rms individually if ambient pollution exceeds an endogenous threshold. If the ne for noncompliance is high enough, the agency's costs are lower t...