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the black smoke
Aiming at the characteristics of carbon black, a new method of controlling the black smoke from the industrial coal-burning ceramic kilns by wetting was brought forward.
      
The older the tested vehicles, the higher the NOx concentrations emitted, however, there was no obvious correlation between the age of the tested diesel vehicles and the black smoke reflectivity.
      
In addition, if the make and engine displacement volume of the tested diesel vehicles are not taken into consideration, then the correlation between the black smoke reflectivity and nitrogen oxides emission weakens.
      
For many years measurements of particles in the UK atmosphere have been carried out using the black smoke method.
      
For reasons which were sound at the time, airborne particulate matter in the UK atmosphere has traditionally been measured by the Black Smoke method.
      
However, similar to the aethalometer, a site-specific calibration is required to estimate mass concentrations from the black smoke monitor.
      
It seems that the black smoke and odor problems have disappeared behind newly emerging emission problems such as acid gases, Hg, dioxins and so on.
      
Similar to the aethalometer method, one can not directly correlate the black smoke readings to mass concentrations.
      
There is no evidence that reduced sulfur levels have any influence on the carbonaceous portion of PM and on the black smoke.
      
The black smoke data collected at the background location and the two heavy traffic locations as distinguished in the foregoing section are applied.
      
The black smoke belched out by the factories do pollute the environment and we are not aware how this problem can be solved.
      
What often appears to be the most significant adverse impact of burning is the black smoke released to the atmosphere.
      
When there is no wind, the black smoke just sits there and it contaminates the mountain goats' food.
      
 

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