how is colloid chemistry applied in purification of industrial smoke?
437537
Since smoke is a colloid, I suppose any modification of that smoke would involve colloid chemistry.
425555
this depends on what you analysis is for.\n\nI presume you are using HCl and HNO3 (this mixture is aqua regia, and is an old mixture used by alchemists to dissolve metals) which would produce a solution containing metals contained in the flyash. This is the safest method.\n\nFurther analysis for getting rid of organics and further getting to the metals (flyash is made of coal) is also dangerous, as it uses H3PO4 and HNO3, this combination if heated is explosive so should be done by experienced chemists.\n\nNow... if you want to analyise the actual organic components in flyash then this beocmes more difficult as you now are dealing with highly complex organic structures... you should be careful with acid as it could destroy a lot of the flyash molecules. Such analysis is complicated, requiring many steps.
696442
It would depend on what the nature is of the unwanted impurities. One could use chemical separation or distillation.  Distillation would be the easiest.
36519
You might want to use triethylene glycol instead of glycerol (glycerine) with water.  If you make the glycerol smoke too thick, it will leave a sticky film on everything.  You can further mix the triethylene glycol with propylene glycol to create thicker, heavier, billowing or just whispy.  Range the percentage of the glycol from 10 to 75% with the water.\n\nif you are going to use glycerol, make sure you do not get the one with sorbitol or any other additive.\nUse destilled de-ionized water if possible.\n\nFor added bonus add food coloring to the mixture before putting it in the fog machine.  If you have multiple fog machines you can create various effects, blue smoke that hovers, neon yellow that billows on the floor and so on...  \n\nYou can add water based aromas to like sandalwood, but test it through your machine first.  Some scorches the scent and does not smell pleasant.\n\nThe higher percentage of glycol the thicker the smoke.
676013
The proper answer is with HEPA filters. Air purifiers are only as good as the engineering before the manufacturing process. Air conditioning has no viable way to eliminate the toxic contamination(hidden in odors). \n\nTo rid yourself from the damaging effects of toxic paint fumes, you will need to have MSAH filters in combination with HEPA. But, you will rid yourself of possible lung damage.
904148
I'm sorry, your question has me baffled.  \n\nWhat type of "protective action" are you referring to,and what type of colloids?\n\nColloids are simply mixtures of one phase of a substance within another phase of another substance.\n\nColloids typically have a very high surface area, so can be used to adsorb contaminants.  This would give them a protective action of sorts, but this depends on the colloid and the setting.
182902
Specifically, water binds to the mixture, and blocks free oxygen from reaching the material to be oxidized-its a simple smothering reaction, and is why water is effective for putting out fires.  Salt is also effective, but is reduced by the relatively large size of the particles which allows some oxygen in.  There is no specific inhibition of the oxidization reaction other than this-water is neutral to this reaction, except as a space inhibitor.
195474
A number of stages is necessary:\n\n1. Filtration - To remove particles, can be any filter.\n2. Odor removal - Use charcoal\n3. Ultraviolet treatment - To kill most germs\n4. Reverse osmosis
199880
dugout, one hitter, and a stick of gum is the best so far.\n\nSome maintenance guys showed me a trick one time:\n\nThey would go into the filter room of a ventilation system in the 12 story building that we worked in.  They would light the joint at the door, then step inside.  Unless you were standing in the circle, you couldn't tell something was burning. You couldn't see or smell the smoke.... I don't understand the physics of it, but it really worked.
290908
http://www.eacochem.com/lc_aluminumcleaning.shtml
814399
Pure silica sand will be unaffected by hydrogen peroxide. Salt (NaCl) will be dissolved in the H2O2-solution.\n\nIf you take sand from the garden or similar sources, the sand will have impurities (bacteria, decomposed organic matter, up to short fragments of roots) which will react with the H2O2 - large particles will be bleached, smaller ones will be oxidized and dissolved. H2O2-solution is used to free sediment samples of organic "glues" which prevent sieving. Depending on the degree of organic contamination, concentrations between 5 and 25% are used. Too strong solutions meeting lots of organic material will heat up, foam up and create a mess that can bleach skin and attack surfaces and organs (eyes, other tissue). Thinning with cold water usually slows down the foaming.
880924
air and unburned particles
971031
use mouth wash, tic tac or whatever just use a lot, some axe spray or tag. cologne would be really effective. clear eyes definitly. hand sanitizer. the smell of smoke isnt that hard to take care of if you know how to take care if it. just blow the smoke in a different direction from yourself.
812877
I don't think it should be.\nBetter to say "chemical a was poured into beaker b and the result was the production of smoke.....etc" than, "I put chemical a into beaker b and I saw smoke come out"
596272
Floccinaucinihilipilification
283474
Naphtha is a solvent with bad effects on the environment.  \nHydropyrolysis or destructive steam gasification is an industrial process used to convert hazardous waste like naphtha into a safer material for disposal.  Hydro (water-based) pyro (burning) lysis is a process where water or steam is used in the presence of heat (a thermal process) for destroying hazardous or toxic waste or converting hazardous or toxic waste into an environmentally safe substance.
897167
I think what you are asking about is called an electrostatic precipitator.  You can buy them at Radio Shack or from The Sharper Image.  There are also large industrial sized versions that work with smoke stacks on large factories to reduce the amount of ash that is discharged.\n\nThat will make for a nice science project.  Please be careful, though, because these devices operate at a very high voltage.