Multiple-Contaminant Private Well Water TreatmentMultiple-Contaminant Private Well Water Treatment...
Transcript of Multiple-Contaminant Private Well Water TreatmentMultiple-Contaminant Private Well Water Treatment...
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Multiple-Contaminant Private Well Water Treatment
Arsenic, Radionuclides, and More
Steve Spayd, PhD, MPH, PG Research Scientist - Hydrogeologist
New Jersey Geological and Water Survey New Jersey Department of Environmental Protection
PO Box 420 Trenton, New Jersey 08625
email: [email protected]
phone: 609-633-1039
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Contributing Authors:
Jenny Goodman, Bureau of Environmental Radiation, NJDEP
Zoltan Szabo, NJ Water Science Center, USGS
Judy Louis, Office of Science, NJDEP
David Grammer, Radata Inc
Videography: Ted Pallis, NJDEP
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Multiple Contaminants in Well Water
• Arsenic (As3 and As5) • Manganese • Iron • Gross Alpha • Radium • Uranium • Radon and Radon Progeny • Sulfur and Iron Bacteria • Boron, Lithium, Sodium, and Sulfate
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http://www.state.nj.us/dep/pwta/Arsenic_Treatment.pdf
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Point-of-Use Treatment for Drinking and Cooking Water at a Single Tap
One study suggests that Whole House (POE) water treatment
provides more effective reduction of arsenic exposure from well
water than does POU.
• Skin Absorption • POU Non Compliance
(Drinking from Untreated Taps)
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Whole House Water Treatment is Best
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Whole House Arsenic Water Treatment
Worker
Tank
Safety
Tank
Pre-Filter
Just Arsenic 100 ug/L
Sample Taps
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Whole House Arsenic Water Treatment
Worker
Tank
Safety
Tank
Arsenic Adsorption
Worker Tank
Arsenic Adsorption
Safety Tank
Water Meter
Pre-Filter
Sample Tap
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As3, Fe, Mn, S – Phase 1
Raw Water Quality: As=48, Fe=1200, Mn=42 ug/L
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As3, Fe, Mn, S – Phase 2
Raw Water Quality: As3/As=48/48, Fe=1200, Mn=42 ug/L
10/49*
1/5 *
<0.5 * 52/55* * As3/Total As
at sample taps
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As3, Fe, Mn, S, Iron Bacteria
Raw Water Quality: As3/As=80/80, Fe=1170, Mn=216 ug/L
<0.5/40 <0.5/3.5 * As3/Total As at sample taps
<0.5/<0.5
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Worker
Tank
Safety
Tank
ChlorineInjectionStorage
Tank
Water Storage
Tank
Softener
Chlorine Mixing Tank
BackwashingSediment
Filter
ArsenicWorker
Tank
Pre-Filter
GranularActivatedCarbon
Water Meter
ArsenicSafety Tank
Chlorine Injection
Pump
As3, Fe, Mn, S, Iron Bacteria
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As, Fe, Mn, U, Ra, Rn - Phase 1 Problem Set-UP (BIRM Tank became radioactive)
Raw Water Quality: As=26, Fe=190, Mn=3, U=650 ug/L, Gross Alpha=800, Ra224=30, Ra226=26, Ra228=3, Rn=90,000 pCi/L
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Consider investing in a Micro R/hr Meter
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400* 300* 325* 1900*
Raw Water Quality: As=26, Fe=190, Mn=3, U=650 ug/L, Gross Alpha=800, Ra224=30, Ra226=26, Ra228=3, Rn=90,000 pCi/L
* Micro R/hr
As, Fe, Mn, U, Ra, Rn - Phase 1 Problem Set-UP (BIRM Tank became radioactive)
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June 2009: Radium: 1,200 pCi/g Uranium: 68 pCi/g July 2010: Ra226: 1,617 pCi/g Ra228: 53 pCi/g U234: 43 pCi/g U238: 31 pCi/g
BIRM Media Analysis After Water Exposure
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BIRM Micro R/hr Readings
0
50
100
150
200
250
300
350
400
450
500
5/2/2010 8/10/2010 11/18/2010 2/26/2011 6/6/2011 9/14/2011 12/23/2011 4/1/2012 7/10/2012
Mic
ro R
/Hou
r
Date
Micro R/Hour in Disconnected Tank of BIRM After Exposure to Radium, Uranium, and Radon
Radium 3
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Do not use with water that contains radium.
Using this media with water that contains radium may create
technologically enhanced naturally occurring radioactive materials that
may be a hazard.
Other Manganese Oxide medias are likely to be affected by radium similar to what we have seen with the BIRM.
NJDEP is also seeing elevated radium in Greensand
used with water containing radium.
Warning labels may be needed for this type of media.
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As, Fe, Mn, U, Ra, Rn – Phase 2
Raw Water Quality: As=26, Fe=190, Mn=3, U=650 ug/L, Gross Alpha=800, Ra224=30, Ra226=26, Ra228=3, Rn=90,000 pCi/L
90* 220* 150* 80*
* Micro R/hr
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Video Presentation Click outside the text box on this page to start a two-minute video showing measurements of MicroR/hr readings on water treatment system tanks. You may be asked to “Trust” this file. After “Trusting” re-click the page to start the video. Depending on your computer’s speed, allow up to one minute for video to start. After the video, advance the slide presentation using the down arrow.
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USGS Staff Collaborating With Raw Water Sampling
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Ra, Rn, U, Mn
Raw Water Quality: As <1, Fe=ND, Mn=50, U=5 ug/L, Gross Alpha=50-112, Ra224=3, Ra226=16, Ra228=3, Rn=3,400-5500 pCi/L
Total Ra = 21 pCi/L
20* 1,000* 50*
* Micro R/hr
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Radon (3,400-5,500)
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What’s Wrong with this Picture?
The treatment system to remove
radon is too close to the living space.
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Ra, Rn, U, Mn
Raw Water Quality: As <1, Fe=ND, Mn=50, U=5 ug/L, Gross Alpha=50-112, Ra224=3, Ra226=16, Ra228=3, Rn=3,400-5,500 pCi/L
Total Ra = 21 pCi/L
77*
16-20* 3* 7* * Gross Alpha
at sample taps
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# Protons
92
91
90
88
86
84
83
82
Base from USGS
Seeking Source of Unaccounted for Gross Alpha
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Along with Arsenic, Iron, and Manganese: Sodium, Lithium, and Boron The last two are very difficult to treat.
May be Found in a Well Near You
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Take Home Messages
• Characterize the water (As, Fe, Mn, Gross Alpha, Ra, U, Radon).
• For As, Fe, and Mn, use oxidation systems (Chlorine, Air, and/or MnO2 media) for more efficient and cost effective treatment, BUT not in the presence of Radium.
• If Radium is present, remove it first with a cation water softener.
• If there is Radon in the water, keep GAC away from living areas or use aeration to remove the Radon.
• Look out for unaccounted for Gross Alpha.
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Multiple-Contaminant Private Well Water Treatment
Arsenic, Radionuclides, and More
Steve Spayd, PhD, MPH, PG Research Scientist - Hydrogeologist
New Jersey Geological and Water Survey New Jersey Department of Environmental Protection
PO Box 420 Trenton, New Jersey 08625
email: [email protected]
phone: 609-633-1039