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The drinking water is very heavily chlorinated in my city. I tried brita and a few other pitcher type filters. They remove some chlorine, but not all.

Do you know any device (for less than $500.00 ) to remove chlorine from drinking water?

You can place it in an open large mouthed container and let it evaporate out or try a PUR filter. If you want to get it all out, you'll need a reverse osmosis system and they may run more than 500.

2006-12-10 20:46:52 by kenneth h

A brief overview of drinking water, home treatment systems, and bottled water. keywords: drinking water fluoride chlorine mineral bottled ...

I'm told I can purify and prepare drinking water for long term storage by adding a little chlorine bleach. Anybody know how much chlorine bleach needs to be added to a gallon of fresh water?

For 1 gallon of water, 1 tablespoon is WAY too much.

First, make sure that you boil the water to kill any bacteria. Then add 2 drops of chlorine bleach for every gallon. Seal, and let sit 30 minutes before drinking.

2007-08-24 13:45:18 by trucktrout

Price: $23.99 $18.98

5 Micron Rating, recommended for use with city and well water supplies
For use with Culligan models US-550, US-600, RO-3000 and RO-3500
NSF Certified

Chlorine is widely used to disinfect drinking water. But there is some evidence to link exposure to chloromethane in drinking water with a higher risk of miscarriage during pregnancy.

but the use of chlorine in drinking water is credited with saving millions of lives due to the control of waterborne infectious disease.

now how would you guys reconcile the benefits obtained from the chlorination of drinking water with the evidence of the potential for adverse effects from chlorination?

A lot depends on the source of the water. Riverine water that's been through a lot of sewer plants upstream seems to have the chloromethane and trihalomethanes more abundantly than those further upstream.

Seems to me the risks of infectuous disease from untreated drinking water outweigh the risks for a few from the chloromethanes. The few can drink bottle water if they're concerned.

2008-01-31 21:40:44 by nesarnikhat

Price: $9.95 $9.95

or other chemicals; how do they affect drinking water in terms of ability to drink

Chlorination of drinking water eliminated typhoid, cholera, and dysentery that were commonly carried in drinking water when chlorination was introduced in the early 1900's.

However, there are some negative effects:
I quote:
"... the July [1992] issue of the American Journal of Public Health, researchers found that people who regularly drink tap water containing high levels of chlorinated hydrocarbons have a greater risk of developing bladder and rectal cancers than people who drink unchlorinated water. The study estimates that about 9% of all bladder and 18% of all rectal cancer cases are associated with long-term consumption of these hydrocarbons. This amounts to over 20,000 new cases each year."
http://www.chem.duke.edu/~jds/cruise_che m/water/watinorg.html

European water treatment has largely shifted to ozone and filtration, and they have found it works. Plus the chlorine residuals are about 10 times less than in US water.

Another negative effect of chlorination is that it can create what are known as trihalomethanes. One example of a trihalomethane is chloroform, which causes an allergic reaction in about 10% of the population. Chloroform, or trichloromethane can cause liver and kidney damage. Fortunately the concentrations are monitored and are generally quite low. One trihalomethane, known as dibromochloromethane is associated with cancer risk of one per million at 0.6 micrograms per liter. That's about the same as 6 parts per billion. The cancer risk of this is only one per million, but that concentration is barely measureable, and most people ingest large quantities of drinking water daily, so it is not as insignificant as it may seem.

Bromine is also sometimes used, either in addition to chlorine, or as a substitute. This is the source of what I believe are the worst hazards, such as dibromochloromethane.

Another chemical that is added to drinking water is fluorine. Fluorine is added in much smaller concentrations than chlorine, and does substitute for some of the chlorine so it actually will reduce the amount of chlorination. You probably get quite a bit of fluorine in your toothpaste, as there is almost no toothpaste on the market today that does not contain fluoride. There are some potential negative health effects of fluoridation, however, there is lots of evidence that in the concentrations in most drinking water that it is beneficial more than harmful. Fluoridation is added in about 60% of US public drinking water.
http://www.cancer.gov/cancertopics/facts heet/Risk/fluoridated-water

If you are concerned about your drinking water I suggest you use an activated carbon type filter and filter both drinking and cooking water. Not all activated carbon filters are created equal. Here is a source that explains what they will remove and what they won't remove:
http://www.ext.nodak.edu/extpubs/h2oqual /watsys/ae1029w.htm

Drinking bottled water does not mean you have avoided this problem. Bottled water is regulated in the US by the FDA, and must generally comply with the same standards as public drinking water. In many cases it is better because reverse osmosis, or distillation has removed any potential contaminants. One trade-off is that water in plastic bottles will absorb small quantities of phthalates. Studies that showed that phthalates caused cancer in rats were generally dismissed as not being relevant to humans. They are also known to be broken down in the body within one or two days, so do not pose a risk of bioaccumulation. I quote:
"The CDC report is, in all, very good news because the trace levels of phthalates found are within EPA safety levels and therefore should not pose a concern for human health."
http://www.phthalates.org/yourhealth/hum an_exposure.asp

2006-03-05 08:38:34 by cricketroxx

Although elemental chlorine, Cl2, is added to drinking water supplies primarily to kill microorganisms, another beneficial reaction that also takes place removes sulfides (which would impart unpleasant odors or tastes to the water). For example, the noxious-smelling gas hydrogen sulfide (its odor resembles that of rotten eggs) is removed from water by chlorine by the following reaction.
H2S(aq) + Cl2(aq)= HCl(aq) + S8(s) (unbalanced)
What mass of sulfur is removed from the water when 90. L of water containing 1.5 10-5 g of H2S per liter is treated with 1.0 g of Cl2(g)?

First balence the reaction:
8H2S(aq) + 8Cl2(aq)= 16HCl(aq) + S8(s)
So one mole of H2S would react with one mole of Cl2.
Second find the molar masses:
S8: 8*32.065 g/mol
H2S: 34.082 g/mol
Cl2: 70.906 g/mol
Total H2S in water is: 90*1.5e-5 g = 0.00135 g.
1.0g of Cl2 to react with 0.00135 g of H2S, clearly H2S is the limiting reactant, hence the mass of sulfur removed is:
0.00135g *(32.065/34.082) = 0.00127 g

2008-01-07 14:29:01 by sg s