characteristics of wind-blown dust from arizona mining operations
DESCRIPTION
Characteristics of Wind-Blown Dust from Arizona Mining Operations. Presented by Paul Rheinheimer A.E. Sáez , E.A. Betterton, J. Csavina , A. Wonaschutz , W. Conant, B. Barbaris , A. Landázuri , K. Rine , A. Campillo Research Supported by NIEHS Superfund Research Program. - PowerPoint PPT PresentationTRANSCRIPT
Characteristics of Wind-Blown Dust from Arizona Mining Operations
Presented by Paul RheinheimerA.E. Sáez, E.A. Betterton, J. Csavina, A. Wonaschutz, W. Conant, B. Barbaris, A. Landázuri, K. Rine, A. Campillo Research Supported by NIEHS Superfund Research Program
NASA Space Grant Symposium, 2010
SITES IN FOCUS
Iron King – Inactive mine Inactive smelter
Hayden – Active mineSmelter
PARTICLE SIZES AND RESPIRATORY EFFECTS
Three particle sizes: Coarse
Mechanically generated
Accumulation Fine
Smelting operations
EQUIPMENT Total Suspended Particles Sampler
24 hour sampling timeMeasures PM10
MOUDI – Micro-Orifice Uniform-Deposit ImpactorMultiple day sampling timeMeasures particles over a range of particle sizes (18 μm to 0.054 μm)
PARTICLE MEASUREMENT EQUIPMENT Ion Chromatography
Measures concentrations of water soluble ionsCations: Na+, NH3
+, K+, Mg2+, Ca2+
Anions: Acetate, Formate, Cl-, NO3-, SO4
2-
Inductively Coupled Plasma – Mass SpectrometryMeasures metal and metalloid concentrationsFocus on Arsenic (As), Cadmium (Cd), and Lead
(Pb)
189.96.23.11.81.00.550.320.180.10.054
AF0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
2
4
6
8
10
12
14As Cd Pb
Cutpoint Diameter (μm)
Ave
rage
Con
cent
ratio
n (n
g m
-3)
Ave
rage
Pb
Con
cent
ratio
n (n
g m
-3)
Average concentration over the months of December, January, & February of 2009
AZ HAPS: (Chronic) guidance levels for Arsenic
189.96.23.11.81.00.550.320.180.10.054AF0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
As Cd Pb
Cutpoint Diameter (μm)
Ave
rage
Con
cent
ratio
n (n
g m
-3)
Ave
rage
Pb
Con
cent
ratio
n (n
g m
-3)
AZ HAPS: (Chronic) guidance levels for Arsenic
Average concentration of heavy metals over an annual period (2009)
ANNUAL WIND SPEED & DIRECTION:HAYDEN-WINKLEMAN WIND ROSE
Mine tailings: (Coarse particles)
Smelter: (Fine particles)
CONCLUSIONS & FUTURE WORK
Arsenic found in accumulation mode in concentrations above Arizona HAPS guideline
Lead also found in high concentrations in area
Solve issue of complex topography and its effect on modeling
Move MOUDI to new locations to assess new backgrounds and sources
Study effects metal concentrations have on local population
THANK YOU Dr. Eric Betterton – Department of
Atmospheric Sciences
NIEHS Superfund Research Program
Brian Barbaris – Department of Chemical & Environmental Engineering
Susan Brew – NASA Space Grant
Kyle Rine – Department of Physics
QUESTIONS?