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Is there an intermediate step that involves chloroform in the creation of bromoform, or are they independent reactions? What exactly is the source of the methane? Details please- my public drinking ef="/Faucet-Filters/faucet-water-filter/">water was just announced as being in excess of the standards!!!

Dear carbonates,

I don't know if your Q has purely informative caracter or if it includes also an educational parameter(this would be wonderful in my opinion).
Anyway, I think that the most valid information can be found in the site of
USDA www.usda.gov
www.panna.org
www.epa.gov
I have just visited the consumer's section. It is possible also to send them a question.
There is also a consumer confidence report, on water quality,published in the following site:
www.osan.af.mi/PublicAffairs/water%20quality/Suwon%20AB%20Drinking%20Water.doc
Table 1. shows the contaminant groups misured in a sample of water of a certain area. The substance you are asking about has been found also. In order to facilitate the discourse, I refer that thrihalomethane is the general name of a category of water contaminants and include chloroform and bromoform. Likely source of contaminant:by-products of drinking water chlorination.
This is a big problem:BY-PRODUCTS
Bromoform is produced primarily by algae in the oceans.
I found a good overview of these pollutants in the site
of the Australian government
www.npi.gov.au/database/substance-info/profiles/23.html
Let me say this and then I leave.
In the site
http://hyperion.gsfc.nasa.gov/Public/Mod elling
under the title: A simulation of bromoform's contribution to stratosferic bromine, explains why we have to limit these gases emissions and adopt a sustainable model, otherwise the overall equilibrium in earth is danger.
Bromine can destroy ozone and brominated gases like bromoform, dibromomethane halons and methylbromide can react and release their bromine in the atmosphere.
You can also check out the Montreal protocol following these links.

WOW! Good question! I like pollution issues and I came back after a small internet research.


Katerina

2006-02-07 08:10:33 by carbonates

www.good.is/ Celebrate World Water Day! Animation amp; Design by Chris Weller Produced by Max Joseph Music by Jovian

Do you know if disinfection comes BEFORE filtration or AFTER? THX (please only answer if you know)

Drinking water pre-treatment
1. Pumping and containment - The majority of water must be pumped from its source or directed into pipes or holding tanks. To avoid adding contaminants to the water, this physical infrastructure must be made from appropriate materials and constructed so that accidental contamination does not occur.
2. Screening - The first step in purifying surface water is to remove large debris such as sticks, leaves, trash and other large particles which may interfere with subsequent purification steps. Most deep groundwater does not need screening before other purification steps.
3. Storage - Water from rivers may also be stored in bankside reservoirs for periods between a few days and many months to allow natural biological purification to take place. This is especially important if treatment is by slow sand filters. Storage reservoirs also provide a buffer against short periods of drought or to allow water supply to be maintained during transitory pollution incidents in the source river.
4. Pre-conditioning - Many waters rich in hardness salts are treated with soda-ash (Sodium carbonate) to precipitate calcium carbonate out utilising the common ion effect.
5. Pre-chlorination - In many plants the incoming water was chlorinated to minimise the growth of fouling organisms on the pipe-work and tanks. Because of the potential adverse quality effects , this has largely been discontinued.

2007-12-20 15:32:11 by quizzing_princess_25

Price: $11.95 $6.26

Particle blend removes more than 99.9 percent of cryptosporidium and Giardia
Weighs less than 1 ounce; use in conjunction with treatment drops or tablets for best results
Single unit filters up to 20 gallons of water; improves tastes and eliminates odors

2009-08-03 04:55:39 by gayatri s

Price: $175.00

System comes equipped with everything needed for installation
Valve-in Head shuts water off automatically for easy filter changes - no tools needed
High end ceramic valve Euro style faucet for easy filling of glasses, pitchers, and coffee pots

like the treatments they do so we can have water to drink and do everyday life routine.
and i need some pics please and graphics

Here you find a list of water treatments.

some of the contents of the wiki

1.1 Removal of large objects from influent sewage
1.2 Sedimentation
1.3 Secondary treatment
1.3.1 Activated sludge
1.3.2 Surface-aerated basins
1.3.3 Fluidized bed reactors
1.3.4 Filter beds (oxidising beds)
1.3.5 Biological aerated filters
1.3.6 Membrane bioreactors
1.3.7 Secondary sedimentation
1.3.8 Rotating biological contactors
1.4 Tertiary treatment
1.4.1 Filtration
1.4.2 Lagooning
1.4.3 Constructed wetlands
1.4.4 Nutrient removal
1.4.4.1 Nitrogen removal
1.4.4.2 Phosphorus removal
1.4.5 Disinfection
2 Package plants and batch reactors
3 Sludge treatment and disposal

3.1 Anaerobic digestion
3.2 Aerobic digestion
3.3 Composting
3.4 Thermal depolymerization
3.5 Sludge disposal

4 Treatment in the receiving environment
5 Sewage treatment in developing countries

5.1 Benefits of wastewater treatment compared to benefits of sewage collection in developing countries

The full article can be found here.

http://en.wikipedia.org/wiki/Sewage_trea tment

Another list

http://ga.water.usgs.gov/edu/wwvisit.htm l

Wow here are loads of images.

http://images.google.co.uk/images?hl=en& amp;client=firefox-a&rls=org.mozilla :en-US:official&hs=mHl&q=water+t reatment+facility.&um=1&ie=UTF-8 &sa=X&oi=image_result_group& resnum=1&ct=title&gbv=1&ei=P pCYSOn6LJGA0wTZueT4Dw

2008-08-05 10:17:54 by jennifer f

It is found out that more than 60% of the diseases are water born. If the pure safe drinking water is provided to all in the world most of the health problems are solved. Do you have any other solution?

Yes Of course, water is said to be the best liquid which supports human body 100% and allergic free. there are water therapy in the western countries, it is slowly getting popularise in India also. it is nothing but daily morning empty stomach we have to drink 5 glasses of water, in a day we have to drink avg. of 5 ltrs. water, it gives natural tan to our skin, kidney functions well, good appetite will be there, you feel fresh the whole day.

2008-06-05 19:59:17 by padman