Controlling of gaseous pollutants, Biology

The gaseous pollutants can be controlled through the techniques of combustion, absorption adsorption and cold trapping.

(a)   Combustion: Though combustion is a major cause of is pollution but it helps in controlling pollution by converting hazardous pollutants like volatile organic compounds (VOC) and other gaseous hydrocarbons to CO2 and H2O.                                            If pollutants are organic in nature flame combustion is employed. Catalytic combustion is employed where low operating temperature is required.

(b)   Absorption/adsorption: Gaseous effluents are allowed to pass through scrubbers. This technique can be wet or dry. Some of solvents used for wet scrubbing are NaOH, Na2SO3, Ca (OH)2

For dry Scrubbing activated carbon is used which attracts gases and vapour to its surface.

(c)    Cold trapping: All pollutants from air stream may be removed by cold trapping i.e. freezing them (gases or vapors) in collectors maintained at a low temperature. Fractionation is achieved by using bath (00C) and last collector at a liquid nitrogen.

 

 

Posted Date: 7/12/2012 2:06:42 AM | Location : United States







Related Discussions:- Controlling of gaseous pollutants, Assignment Help, Ask Question on Controlling of gaseous pollutants, Get Answer, Expert's Help, Controlling of gaseous pollutants Discussions

Write discussion on Controlling of gaseous pollutants
Your posts are moderated
Related Questions
Tricuspid Annuloplasty :  Tricuspid valve is evaluated by digital palpation before connecting the patient to cardio pulmonary by pass. Functional regurgitation can be repaire

Explain Endoskeleton in detail. Supporting structures of the skeleton surrounded by the body tissues. As a consequence, there is living tissue on all sides of endoskeletal stru

Procedure for Test the Presence of Sugar in Honey? 1. Mix 5 grams of honey with 5 ml ether in a mortar and pestle. 2. Decant off the ether extract into an evaporating dish.


Q. What are twins? Genetically what are the two types of twins that can be generated? Twins are at the same time generated (within the mother's uterus) offspring. Twins classif

Q. Amphibian identity card. How are amphibians characterized according to examples of representing beings, basic morphology, circulation, skin, nitrogen waste, respiration, thermal

DIFFERENCES BETWEEN MITOSIS AND MEIOSIS    EVENTS  MITOSIS  MEIOSIS  Occurrence  In all the body cells including

Diagnosis Clinical signs: In most of the cases in initial stages like bacterial infections there is leucocytosis with neutrophilia, which at later stages of the disease may c

What are the uses of formycin B? Formycin B is a drug used to demolish of intestinal parasites.

Phosphorylation is the addition of the phosphate monoester to a macromolecule, catalyzed by a particular kinase enzyme. With respect to the proteins, particular amino acid side ch