Human health risk assessment of heavy metals in soils and ...
assessment of heavy metals and cyanide levels in honiara ...
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μ
μ
μg/g μ/g μ
μ μ
μ μ μ
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the
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β
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)
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Reference site (FS)
Metapona L/S (FS)
Metapona U/S (FS)
Tinahula L/S (FS)
Metapona R/M (FS)
Tinahula U/S (FS)
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4.03
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(μg/g)
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g)
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(μ
(μ
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μ μ μ
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μ μg/g μ
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μg/g μg/g μ
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0%10%20%30%40%50%60%70%80%90%
100%
Drainage Adjacentright
Adjacentleft
Upperzone
Taiwanesefarm
Adjacenttop
BurnsCreekfarm
Lowerzone
CustomGarden
Rice farm Ref
exchangeable reducible oxidizable residual
0%10%20%30%40%50%60%70%80%90%
100%
exchageable reducible oxidizable residual
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0%10%20%30%40%50%60%70%80%90%
100%
residual oxidizable reducible exchangeable
0%10%20%30%40%50%60%70%80%90%
100%
% C
u in
ext
ract
ed fr
actio
ns
Soil sampling stations
Cu sequential fractionation
Exchangeable Reducible Oxidizable Residual
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0%10%20%30%40%50%60%70%80%90%
100%
Exchangeable reducible oxidizable resdual
0%10%20%30%40%50%60%70%80%90%
100%
residual oxidizable reducible exchangeable
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0%10%20%30%40%50%60%70%80%90%
100%
residual oxidizable reducible exchangeable
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
CustomGarden
Rice farm Taiwanesefarm
Lowerzone
Drainage Adjacenttop
Upperzone
Adjacemtleft
Adjacentright
BurnsCreekfarm
Ref
exchangeable reducible oxidizable residual
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μ μ
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μ
μ μ
μ
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μ μ
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μ μ
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μ μ
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μ μ
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Rehman
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.
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0%10%20%30%40%50%60%70%80%90%
100%
exchangeable fraction reducible fraction oxidizable fraction residual fraction
0%10%20%30%40%50%60%70%80%90%
100%
exchangeable reducible oxidizable residual
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0%10%20%30%40%50%60%70%80%90%
100%
exchangeable reducible oxidizable residual
0%10%20%30%40%50%60%70%80%90%
100%
residual fraction oxidizable fraction reducible fraction exchangeable fraction
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0%10%20%30%40%50%60%70%80%90%
100%
residual fraction oxidizable fraction reducible fraction exchangeable fraction
0%10%20%30%40%50%60%70%80%90%
100%
% P
b ex
trac
ted
fract
ions
Sediment sampling stations
Lead sequential fractionation
exchangeable reducible oxidizable residual
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0%10%20%30%40%50%60%70%80%90%
100%%
Mn
extr
acte
d fra
ctio
ns
Sediment sampling stations
Mn sequential fractionation
exchangeable reducible oxidizable residual
0%10%20%30%40%50%60%70%80%90%
100%
% Z
n ex
trac
ted
frac
tions
Sediment sampling stations
Zn sequential fractionation
exchangeable reducible oxidizable residual
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μ
μ
μ
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μ
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μ
μ
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)
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μ μ
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7.63
9.128.91
7.827.92
7.72
7.61
8.718.047.838.14
7.627.948.247.52
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μ μ μ
μ μ
μ μ
μ
μ
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0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Tinahula Bridge S1Tinahula Bridge S2Tinahula Bridge S3Tinahula Bridge S4
Tinahula mid-streamTinahula L/stream
Tinahula R/conjunctionSavohio R/conjunction
Savohio R/U/streamMetapona R/S1
Metapona BridgeMetapona River mouth
Marine S1Marine S2Marine S3Reference
exchangeable reducible oxidizable residual
0% 20% 40% 60% 80% 100%
Tinahula Bridge S1Tinahula Bridge S2Tinahula Bridge S3Tinahula Bridge S4
Tinahula mid-streamTinahula L/stream
Tinahula R/conjunctionSavohio R/conjunction
Savohio R/U/streamMetapona R/S1
Metapona BridgeMetapona River mouth
Marine S1Marine S2Marine S3Reference
exchangeable reducible oxidizable residual
157
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Tinahula Bridge S1Tinahula Bridge S2Tinahula Bridge S3Tinahula Bridge S4
Tinahula mid-streamTinahula L/stream
Tinahula R/conjunctionSavohio R/conjunction
Savohio R/U/streamMetapona R/S1
Metapona BridgeMetapona River mouth
Marine S1Marine S2Marine S3Reference
exchangeable reducible oxidizable residual
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Tinahula Bridge S1Tinahula Bridge S2Tinahula Bridge S3Tinahula Bridge S4
Tinahula mid-streamTinahula L/stream
Tinahula R/conjunctionSavohio R/conjunction
Savohio R/U/streamMetapona R/S1
Metapona BridgeMetapona River mouth
Marine S1Marine S2Marine S3Reference
exchangeable reducible oxidizable residual
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0% 20% 40% 60% 80% 100%
Tinahula Bridge S1Tinahula Bridge S2Tinahula Bridge S3Tinahula Bridge S4
Tinahula mid-streamTinahula L/stream
Tinahula R/conjunctionSavohio R/conjunction
Savohio R/U/streamMetapona R/S1
Metapona BridgeMetapona River mouth
Marine S1Marine S2Marine S3Reference
exchangeable reducible oxidizable residual
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μ
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0 5000 10000 15000 20000 25000
Lower zone
Adjacent left
Adjacent right
Adjacent top
Upper zone
Drainage
Custom garden
Rice farm
Burns creek farm
Tawainese farm
Ref
levels of metals (μg/g)
Sam
plin
g sta
tions
Concentrations of metals in soils around the dumpsite and its environ farms
Cu Pb Cr Cd As Mn Fe Zn
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0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000
H/C Market
H/F village
H/C Hospital
Mataniko R/mouth
Lunga R/mouth
Bahai
Ranadi/I/ area
H/Point C/ Wharf
Mamana Wata
Mataniko U/S
Kukum area
H/Iron B/Sound
H/M/ School
Ref: H/R. Beach
Levels of metals (μg/g)
Sam
plin
g sta
tions
Concentration of metals in Honiara Harbor sediments
Cu Pb Cr Cd Mn Fe Zn As
249
Concentrations of metals in riverine sediments around Gold Ridge mine
0 200 400 600 800 1000 1200
Tinahula Bridge S1Tinahula Bridge S2Tinahula Bridge S3Tinahula Bridge S4
Tinahula mid streamTinahula L/stream
Tinahula R/conjunctionSavohio R/conjunction
Savohio R/U/streamMetapona R/S1
Metapona BridgeMetapona River Mouth
Marine S1Marine S2Marine S3Reference
Cu Pb Cd Cr As
250
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