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[email protected]/2013
Accumulated Organic Content
Sinking velocity and travel time for spherical particles in
nonturbulent freshwater (after von Engelhardt
1973, Littke et al. 1997a)
Correlation between
marine organic
carbon
content and
sedimentation rate
sediments
deposited in normal open-
ocean environments (field A),
upwelling high-productivity
areas (field A’) and anoxic
environments (field B)
Allochthonous Organic Matter
Autochtonous
Alochthonous
Organic Matter
accumulate organic matter from
the (mainly planktonic) productivity in the
overlying water column
• redeposition of marine sediments after
erosion
• turbidity current by which sediment is
suspended in the near-bottom water
column and then settles again
Turbidity currents may expose the organic
matter to an oxygen rich water mass causing
further degradation during resettling
The redeposited allochthonous sediment will
differ only very little in age from the underlying
autochthonous sediment
Organic Carbon
pore-water DOC
concentrations generally
increase with depth
In anoxic sediments :
sulfate reduction
dominates and benthic
macrofaunal processes
(i.e., bioturbation
and/or bioirrigation)
are insignificant
Pore-water DOC concentrations versus depth in bioturbated
and/or bioirigated
Organic Nitrogen
Organic Phosphorus
Dissolved Transport Index (DTI)
Rasio antara konsentrasi materi teruspensi dengan
transport totalnya
Makin tinggi DTI makin besar komposisi elemen terlarut
%100
x
partikeliteradsorpskimiaelementerlarutkimiaelemen
terlarutkimiaelemenDTI
Kapasitas Adsorbsi
Banyaknya zat terlarut yang teradsorpsi oleh setiap gram
adsorben pada keadaan jenuh
%100
partikeliteradsorpskimiaelementerlarutkimiaelemen
partikeliteradsorpskimiaelemenadsorpsiKapasitas
• Jelaskan fate bahan organik C, N, P di sedimen (lengkapi dengan diagram/skema bila perlu)
• Bila ada data sbb, hitung nilai DTI dan kapasitas adsorpsi. Jelaskan maknanya
TUGAS
St1 St2 St3 St4 St1 St2 St3 St4
Silikat N Kjendhal
saring 17.96 14.425 5.595 5.391 saring 1.024 1.118 0.605 0.733
tdk
saring17.874 15.417 7.098 5.888
tdk
saring2.033 1.343 0.775 0.541
PO4 Total P
saring 0.157 0.188 0.097 0.081 saring 0.42 0.188 0.446 0.171
tdk
saring0.02 0.853 0.109 0.026
tdk
saring 0.134 0.108 0.167 0.19
