Geoscience Reference
In-Depth Information
Mn
Fe
Post-remediation
sediment - rich in algal
material.
Concentration
(
µ
g /g)
Concentration
(
µ
g /g)
3000
0
150,000
0
Water
Column
0
0
Post-
remediation.
0.1
0.1
Sediment
Column
Metal-rich glass grains
input during site clean-up
0.2
0.2
Pre-
remediation.
0.3
0.3
Cu
Zn
Concentration
(
µ
g /g)
Concentration
(
µ
g /g)
0
8000
30,000
0
0
0
0.1
0.1
Pre-remediation
sediment - rich in
contaminant grains.
0.2
0.2
0.3
0.3
Case Fig. 6.3(b)
Sediment profile from the Salford Quays showing the record of the remediation of the water column. Note the presence of high metal concentrations at
12-17 cm depth, caused by the presence of anthropogenic metal-rich glass grains. Pre-remediation sediment is composed of mixed-origin detrital grains (natural clay and quartz grains,
metal-rich anthropogenic grains). Post-remediation sediment is composed of autochthonous clays and algal material derived from the overlying water column. (From data published in
Taylor et al. 2003.)
