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You will discover 5 varieties of air purifiers that cover the whole house. There is the High Efficiency Particulate Accumulation or HEPA for short. It removes 99.97% of particles from the air and needs and powerful blower. It uses woven glass particles and these particles are formed into a filter that has a really huge surface location. The second kind of purifier may be the electronic purifier. It removes 95% of dust and about 85% of microscopic particles. It works by drawing particles inward by fan and then charges them having a high voltage wire. Yet another charge then attracts the particle as they pass. The third kind if purifier may be the self-charging electrostatic purifier. This kind of purifier blocks about 10% - 35% of particles in the air. It works by making use of synthetic fibers that make static charge to attract particles. The fourth sort of purifier is the ultra-violet light purifier. There is no technique utilised to establish it rate of removal even though most units in this class have limited effectiveness of killing bacteria and mold. This purifier works by sterilizing air that passes UV lamps via blowing air. The fifth sort of purifier is the ozone-ionizer. It works in two actions to clean the air. The ozone (naturally occurring gas) purifies the air by oxidation. The ozone then penetrates into the molecules of the pollutant. The second step is ionization. The particle in the air is charged with negative ions and these charges attach to the particles forcing them to drop out of the air.
Suggestions needed on how to separate activated carbon from wood chips containing gold in gold mining?
I need a process whereby I will be able to separate activated carbon from wood chips, both containing gold. It must be a process whereby I can extract the gold from each product separately without destroying either product by burning it. The wood chips will be leached-out gold and the activated carbon will be illuted extraction. The process must be able to handle large tonnages of the mixed product. Your input into this matter would be greatly appreciated.
From your question it sounds like the gold is finely divided. I which case I will avoid the obvious - mechanical separation with rifflers and sluices.
The main way folks extract low levels of finely divided gold out of soil is through cyanide leaching. They build big mounds (hundreds of feet high) of soil on a watertight membrane. They drip the cyanide liquid on top and let it drain through the soil. They pull the solution at the bottom collecting pound. Run it through a deionizing resin bed. Then when the bed gets loaded up with gold ions, they smelt the whole bed in a reducing environment. Everything is burned away except the metals.
Then they have to refine that mixed metal, to gain the pure gold.
http://en.wikipedia.org/wiki/Gold_extraction
Now your problem with keeping the wood and coal… At the end of this extraction process you have cyanide-contaminated soil. The way you treat this soil is with roasting, to burn up the cyanide and leaving mostly clean soil.
You said you want to keep the wood and coal, obviously destructive incineration is not the option you want. But this means you are going to have some toxic sawdust on your hands.
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