surface area grain size relations
Download
Skip this Video
Download Presentation
Surface Area/Grain Size Relations

Loading in 2 Seconds...

play fullscreen
1 / 18

Surface Area/Grain Size Relations - PowerPoint PPT Presentation


  • 86 Views
  • Uploaded on

Surface Area/Grain Size Relations. Figure 2.2.8.1, page 31; Horowitz, A.J., 1991. A Primer on Sediment Trace Element Chemistry, 2 nd edition, Lewis Publishers, Chelsea, Michigan. Forstner, U, and Witmann, GTW. Figure 39a and b. page 127. Metal Pollution in the

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Surface Area/Grain Size Relations' - rose-ellison


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
surface area grain size relations
Surface Area/Grain Size Relations

Figure 2.2.8.1, page 31; Horowitz, A.J., 1991. A Primer on Sediment

Trace Element Chemistry, 2nd edition, Lewis Publishers, Chelsea, Michigan.

slide2

Forstner, U, and Witmann, GTW. Figure 39a and b. page 127. Metal Pollution in the

Aquatic Environment; Springer Verlag, Berlin.

changes in surface area as a function of grain size
Changes in Surface Area as aFunction of Grain Size

Table from Horowitz, 1991; data from Jackson, 1979

influence of grain mineralogy on surface area
Influence of Grain Mineralogy on Surface Area

Table from Horowitz, 1991; data fromForstner and Wittmann, 1981

influence of coatings on surface area
Influence of Coatings on Surface Area
  • Sand-sized and Larger seds.: grain coatings composed of carbonates, Fe & Mn oxides and hydroxides, and organic matter are rough in comparison to surface of the underlying particles.
    • Coatings may comprise <5% by weight, but account for significant portion of the total surface area.
  • Silt and clays sized particles: coatings fill in surface irregularities. Also, cement grains together, creating larger agglomerated grains. Combination of processes reduces surface area.

Based on Horowitz and Elrick, 1987

grain size vs concentration
Grain Size vs. Concentration
  • Semi-systematic increase in concentration with finer-grained material
  • Decrease in conc. In finest fraction due to coatings, composition, and agglomeration of grains
  • Increase in fine sand due to dentrital minerals. Also to influx of metal enriched sediments from pollutant sources.

Forstner, U, and Witmann, GTW. Figure 36. page 123. Metal Pollution in the

Aquatic Environment; Springer Verlag, Berlin.

grain size vs concentration1
Grain Size vs. Concentration

Data from Forstner and Wittman, 1979

slide8

Concentration vs. Quantity of Fine Sediment

  • Sizes Frequently Used
  • 16 μm
  • 62.5 μm
  • 63 μm
  • 125 μm

Data from deGroot et al., 1982

metals per unit mass
Metals per unit Mass
  • Some deposits may contain so little fine-grained material that the bulk of the metal contaminant per unit mass is found in the sand-sized fraction.
slide12

Reno

Fallon

Lahontan

Reservoir

Virginia

i

l

M

e

City

x

C

i

a

95

Fort

S

n

y

o

Table

n

Churchill

15

Six Mile

Mtn.

11

18

Canyon Fan

14

13

16

17

9

10

Mineral

7C

12

Canyon

7D

Gaging

Station

Gold Canyon

7B

7

6

Dayton

5

4

Pyramid

3

Lake

2B

Canyon

(Brunswick)

Carson

2

City

T

Carson

1B

r

u

Playa

c

k

e

Stillwater

e

1

R

Wildlife

.

.

R

Refuge

n

o

s

r

a

C

395

0

.

R

Gaging

Lahontan

e

e

k

c

station

Carson

Reservoir

u

r

Lake

T

.

.

R

Lake

n

o

Carson River

s

Tahoe

r

a

C

Watershed Boundary

Carson

City

k

r

o

F

E

a

t

s

s

t

e

0

1

2

3

4

5

W

Miles

F

F

o

0

1

2

3

4

Km

o

r

r

k

k

SIERRA NEVADA

Nevada

California

slide15

Reno

Fallon

Lahontan

Reservoir

Virginia

i

l

M

e

City

x

C

i

a

95

Fort

S

n

y

o

Table

n

Churchill

15

Six Mile

Mtn.

11

18

Canyon Fan

14

13

16

17

9

10

Mineral

7C

12

Canyon

7D

Gaging

Station

Gold Canyon

7B

7

6

Dayton

5

4

Pyramid

3

Lake

2B

Canyon

(Brunswick)

Carson

2

City

T

Carson

1B

r

u

Playa

c

k

e

Stillwater

e

1

R

Wildlife

.

.

R

Refuge

n

o

s

r

a

C

395

0

.

R

Gaging

Lahontan

e

e

k

c

station

Carson

Reservoir

u

r

Lake

T

.

.

R

Lake

n

o

Carson River

s

Tahoe

r

a

C

Watershed Boundary

Carson

City

k

r

o

F

E

a

t

s

s

t

e

0

1

2

3

4

5

W

Miles

F

F

o

0

1

2

3

4

Km

o

r

r

k

k

SIERRA NEVADA

Nevada

California

slide18

Fractional Contributions

of Selected Metals in

Suspended Sediments

(modified from Horowitz et al., 1990)

ad