albertlee Posted May 10, 2004 Posted May 10, 2004 Does any body know any sufficient/easy method to do such except applying evaporation & condensation or distillation? Any body? Apreciate the responds......... Albert
YT2095 Posted May 11, 2004 Posted May 11, 2004 well you may electrolise the water, that will provide you with your 2 parts Hydrogen and 1 part Oxygen, but it`s an awefull waste of electricity! but then there are certain biological processes that maybe employed, both plant and animal that will give a drinkable fluid from saline, but it takes a long time to get significant quantities en mass. black sand beds in shallow water and polyprop sheeting framed over it into troughs are your best bet, let nature do the rest for you )
albertlee Posted May 12, 2004 Author Posted May 12, 2004 Well, thx to the responds...... some of methods are sufficient, but not easy.......... I have think of a method.... but i need some suggestion... pour the seawater (about 200cc) in a big beaker...... Use a big sponge to fill the top of the beaker...leaving no spaces to let the steam out...... but still leaves a certain distance from the seawater to the sponge....... use a bunsen to heat the beaker..... when the water is gone, leaving the remaining salt at the bottom........ take the sponge carefully out of the top of the beaker..... then squeeze the sponge in another beaker....... I think it is going to work.... but still.... Any suggestion? Albert
YT2095 Posted May 12, 2004 Posted May 12, 2004 Does any body know any sufficient/easy method to do such except applying evaporation & condensation or distillation? I thought according to this, distilation or evaporation was disallowed? and yet your above post is exactly that? I`m confused? )
aommaster Posted May 12, 2004 Posted May 12, 2004 to add on to that, all you are doing is collecting the condensed water in a sponge. Exactly what you said not to do!
hierarch Posted May 12, 2004 Posted May 12, 2004 Well' date=' thx to the responds...... pour the seawater (about 200cc) in a big beaker...... Use a big sponge to fill the top of the beaker...leaving no spaces to let the steam out...... but still leaves a certain distance from the seawater to the sponge....... use a bunsen to heat the beaker..... when the water is gone, leaving the remaining salt at the bottom........ take the sponge carefully out of the top of the beaker..... then squeeze the sponge in another beaker....... I think it is going to work.... but still.... [i']Any suggestion?[/i] Albert In fact, it is a form of evaporation using sponge to collect condensed water. Distillation is more efficient than it.
albertlee Posted May 13, 2004 Author Posted May 13, 2004 Here is another method I can think of... the black bold line indicates the aluminium foil the blue part indicates the salt water the red arrow indicates the heat from the bunsen the steam will be rised up to the aluminium foil where it cools down and goes down along the aluminium foil and being collected in the basin........ will this method work? any body?
Sayonara Posted May 13, 2004 Posted May 13, 2004 That's just evaporation/condensation, which you ruled out in the first post. It will work very well, but it's not the most energy-efficient method.
Dave Posted May 13, 2004 Posted May 13, 2004 Should do, but it's still using the method of condensation (on the aluminium foil).
albertlee Posted May 13, 2004 Author Posted May 13, 2004 every body, it is still same theory, but my chemistry teacher wants us not to use scientific equipment like condenser, to do it... I have to think another way of traping the steam and in order to condense it........ any way, thx for the suggestions........ Albert
Dave Posted May 13, 2004 Posted May 13, 2004 As far as I can see you're not using a scientific condenser, just a piece of alumnium foil (unless I'm being particularlly stupid today, which could be the case considering how I'm not understanding any of my analysis ).
albertlee Posted May 15, 2004 Author Posted May 15, 2004 Here is another example comming up by another member in my group....... The apparatus on top of the beaker with salt water is aluminium shaped thing with a special "mouth" where the evaporate water can drop into the small beaker.................. Will this method work better than the previous method? Albert
albertlee Posted May 16, 2004 Author Posted May 16, 2004 So can any one give the reasons of both method?
albertlee Posted May 16, 2004 Author Posted May 16, 2004 Any body? I think my question is a little bit too vague.... What i realy mean is can any one compare both methods on which one is better while giving reasons? Albert
YT2095 Posted May 16, 2004 Posted May 16, 2004 are you trying to say that want to purify sea water so that it`s drinkable, but you can NOT use any Lab equipment? and by Lab equipment I mean Quickfit condensers glass tubing etc... but the beaker and bunsen is ok. the rest must be just ordinary things anyone could make?
felinlasv Posted May 16, 2004 Posted May 16, 2004 Well, you can evaporate the water, which will leave the salt and other compounds out of your condense, but I don't know if that's enough to make it pure enough to drink..
YT2095 Posted May 16, 2004 Posted May 16, 2004 it will be 100% pure water perfectly safe, well unless there`s air contaminants, but done as basic, I`de drink it anyday!
albertlee Posted May 16, 2004 Author Posted May 16, 2004 Well guys.......... Did u see the two pictures in my thread? they are the two methods by my group given, and What I ask is that which one is faster to evaporate and condense the salt water and traping the steam more efficiently? ANy body? Albert
YT2095 Posted May 16, 2004 Posted May 16, 2004 I`de go with post #9, it has a greater surface cooling area
aman Posted May 16, 2004 Posted May 16, 2004 An easy way to purify sea water is to be at a place where the temperature is well below freezing. and spray the water over a distance. The first Ice crystals that form and fall close are the least salty and the farthest crystals are concentrated salty slush. Scrape up the fresh crystals and melt them for fresh water. The method has been used successfuly in the past. Just aman
albertlee Posted May 24, 2004 Author Posted May 24, 2004 for my method in post no.9,many people like YT2095 suggest this method would be better than my previous one...... but doubtfully, my chemistry teacher says that it wont work as the heat is also heating the basin........but what I think is, that center would be the hottest, it goes like a convection........When the heat finally evaporate all the water into steam, the steam is still trapped in the aluminium, and cools down along the side, because again the center is the hottest, it goes like a convection.....finally, the water steam is liquid in the basin........... Any idea on the comparison of my theory and my teacher's quote on the method in reality? Apreciate for furthur responds.... Albert
albertlee Posted May 25, 2004 Author Posted May 25, 2004 any body have suggestions/helps to My previous Message? apreciate albertlee
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