Coupled mobilization of dissolved organic matter and metals (Cu and Zn) in soil columns

Details Coupled mobilization of dissolved organic matter and metals (Cu and Zn) in soil columns Coupled mobilization of dissolved organic matter and metals (Cu and Zn) in soil columns

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007gecoa..71.3407z&link_type=abstract

Geochimica et Cosmochimica Acta, Volume 71, Issue 14, p. 3407-3418.

Other

1

Scientific paper

Dissolved organic carbon (DOC) is a key component involved in metal displacement in soils. In this study, we investigated the concentration profiles of soil-borne DOC, Cu and Zn at various irrigation rates with synthetic rain water under quasi steady-state conditions, using repacked soil columns with a metal-polluted topsoil and two unpolluted subsoils. Soil solution was collected using suction cups installed at centimeter intervals over depth. In the topsoil the concentrations of DOC, dissolved metals (Zn and Cu), major cations (Ca2+ and Mg2+) and anions (NO3- and SO42-) increased with depth. In the subsoil, the Cu and Zn concentrations dropped to background levels within 2 cm. All compounds were much faster mobilized in the first 4 cm than in the rest of the topsoil. DOC and Cu concentrations were higher at higher flow rates for a given depth, whereas the concentrations of the other ions decreased with increasing flow rate. The decomposition of soil organic matter resulted in the formation of DOC, SO42-, and NO3- and was the main driver of the system. Regression analysis indicated that Cu mobilization was governed by DOC, whereas Zn mobilization was primarily determined by Ca and to a lesser extent by DOC. Labile Zn and Cu2+ concentrations were well predicted by the NICA-Donnan model. The results highlight the value of high-resolution in-situ measurements of DOC and metal mobilization in soil profiles.

Affiliated with

Also associated with

No associations

Rating

Coupled mobilization of dissolved organic matter and metals (Cu and Zn) in soil columns does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coupled mobilization of dissolved organic matter and metals (Cu and Zn) in soil columns, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupled mobilization of dissolved organic matter and metals (Cu and Zn) in soil columns will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1663104