User Tag List

Informational! Informational!:  0
Likes Likes:  0
Page 1 of 2 12 LastLast
Results 1 to 8 of 9

Thread: TDS and carbonic acid.

  1. #1
    Taliesin-DS's Avatar
    Join Date
    May 2009
    Location
    wezep, the netherlands
    Posts
    895
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    TDS and carbonic acid.

    I just went over the water quality report of my water supplier and checked the numbers.
    It's tested at our local pumping station.
    The conductivity is 23,8 mS/m wich i calculated is about 152 TDS.
    In the list of dissolved stuff is says Waterstofcarbonaat 107 ppm (which is carbonic acid).
    What i can find about this acid is that it gets picked up when you measure conductivity.
    What i understand about this is according to these numbers, 107 out of 152 of my waters TDS is harmless co2, which leaves me with 45 TDS.
    Am i right about that ?

    Edit: typo in topic title, but can't edit it.

  2. #2
    herenorthere's Avatar
    Join Date
    Feb 2003
    Location
    almost Hartford
    Posts
    3,785
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It isn't exactly right, but it's probably close enough. Each ion has a different effect on conductance and the conversion of conductance to dissolved solids estimate assumes a "typical" water chemistry. But that's a question for a geochemistry exam, not anything you need to worry about.

    Does the report also list hardness or results for things like Ca, Na and Cl? Knowing those is more worthwhile than knowing a TDS number which was estimated from a conductance measurement.
    Bruce in CT

    Madness is something rare in individuals — but in groups, parties, peoples, ages it is the rule. Friedrich Nietzsche

  3. #3
    Taliesin-DS's Avatar
    Join Date
    May 2009
    Location
    wezep, the netherlands
    Posts
    895
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Ca 38.6
    Na 11.4
    Cloride 12
    Sulfate 17
    Total hardness in D 6

    some other stuff in smaller amounts: (in microgram/liter)
    K 1.2
    Fe <0.01
    Mn <0.005
    Al <2
    Sb <1
    Ba 0
    B <10
    Cd <0.10
    Cr 0.702
    Cu <5
    Hg <0.02
    Pb <0.5
    Ni 1.34
    Se <1
    Zn 0
    Cyanide <2
    Fluoride 0.05

    NH4 <0.03
    NO2 <0.01
    NO3 9.5
    C 21

    pH 7.88
    Temperature 10 c
    The water comes from rainwater that falls on a big hill with a pine forest on top, it's a nature reserve.
    After that the water seeps down through 100 meters of sand to the bottom of the hill were it's pumped up as tapwater.

    Edit: at the other side of the same big hill theres a small peat bog with 2 species of dews and 1 ping species growing in the same water.
    Last edited by Taliesin-DS; 06-09-2010 at 09:42 AM.

  4. #4
    herenorthere's Avatar
    Join Date
    Feb 2003
    Location
    almost Hartford
    Posts
    3,785
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Assuming those are reported as ppm, they add up to 100+, but that isn't bad. The NO3 is almost to the US limit of 10 (which is widely violated in agricultural regions) and the Cr and Ni are surprisingly high. Are you in a mining/smelting area?
    Bruce in CT

    Madness is something rare in individuals — but in groups, parties, peoples, ages it is the rule. Friedrich Nietzsche

  5. #5
    Eats genetically engineered tomatoes Sig's Avatar
    Join Date
    Mar 2010
    Location
    Michigan -- If you don’t like the weather, blink!
    Posts
    900
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Too much nitrate would probably be one of the worst things in the water for cps, as that's a steady source of nitrogen.
    Formerly known as Silenceisgod!

  6. #6
    Taliesin-DS's Avatar
    Join Date
    May 2009
    Location
    wezep, the netherlands
    Posts
    895
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There hasn't been any mining here ever, there are the water is from used to be a dedicious forest in the middle ages.
    The trees have been chopped down for wood, a lot of it was used for brick production further downstream.
    After that the land dried out and became a big desert with sandstorms.
    To stop that they planted lots of pines and nothing has happened there since.
    10 to 20 miles from here there is some industry, a big paper factory wich has been shut down for years and an Akzo Nobel chemical factory, maybe that's the source of the nickel and chrome, but i wouldn't know :P
    The big hill i was talking about is about 50 by 150 km and is made of sand deposited there in the last iceage.
    There is virtually no industry or large towns on that hill itself.
    Only a little agriculture, most of it is woods, and a large military area were they train with artillery.

  7. #7
    herenorthere's Avatar
    Join Date
    Feb 2003
    Location
    almost Hartford
    Posts
    3,785
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I was just curious - the Cr and Ni re-awakened my dormant geology and geochemistry background. I think those amounts of Cr and Ni might be a concern in a public drinking water source here, but it would depend on the form of the Cr. A military area is a plausible source for just about any kind of contaminant and those levels aren't unheard of in nature.

    As for whether such water is OK for CPs, it's probably fine for Neps but a little too "salty" for Sarrs, etc. I don't know if the NO3 is high enough to be a problem for plants not expecting it.
    Bruce in CT

    Madness is something rare in individuals — but in groups, parties, peoples, ages it is the rule. Friedrich Nietzsche

  8. #8
    Taliesin-DS's Avatar
    Join Date
    May 2009
    Location
    wezep, the netherlands
    Posts
    895
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    A lot of ppl fertilize their cp's, doesn't that add a lot more NO3 then just 10ppm in water?

    Edit:totally read the report wrong XD
    Everything from Al to fluoride isnt in mg/l, but in microgram/liter...

Page 1 of 2 12 LastLast

Similar Threads

  1. Gibberellic Acid
    By Crissytal in forum General Discussions
    Replies: 7
    Last Post: 04-02-2009, 02:30 PM
  2. Is an acid test REALLY enough?
    By Clint in forum Greenhouses, Terrariums and Bog Gardens
    Replies: 10
    Last Post: 07-09-2008, 09:59 AM
  3. Gibberellic acid
    By Amateur_Expert in forum Venus Flytrap (Dionaea ) Care Information & Tips
    Replies: 9
    Last Post: 08-12-2004, 07:56 AM
  4. Giberillic Acid
    By Shauntell in forum Sundews (Drosera), Byblis, Drosophyllum
    Replies: 4
    Last Post: 08-26-2002, 10:30 PM
  5. GA3/Gibberellic Acid
    By Pyro in forum General Discussions
    Replies: 8
    Last Post: 02-26-2002, 12:20 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •