Colloid-Facilitated Metal Transport in Peat Filters
Artikel i vetenskaplig tidskrift, 2010
The effect of colloids on metal retention in peat columns was studied, with the focus on colloids from two sources-organic matter leached from peat, and introduced organic and hydrous ferric oxide (HFO) colloids. A significant fraction of metals was found to be associated with peat-produced organic colloids; however the concentrations of organic colloids leached are low (trace concentrations) and temporal and have a limited effect on the efficiency of peat filters. In contrast, the presence of organic and HFO colloids in the input water causes a significant decrease in the performance of peat filters. Organic colloids were identified as the main vector of cadmium, copper, nickel, and zinc, while lead is transported by both organic and HFO colloids. The colloidal distribution of metals obtained in this study has important implications for the mobility of trace metals in porous media. The occurrence of colloids in the input waters and their characteristics must be considered when designing water treatment facilities.
humic-acid
iron oxide
aquatic colloids
peat
colloid
sorption
organic-matter
adsorption
runoff
size fractionation
metal
transport
field-flow fractionation
trace-elements
ultrafiltration
landfill leachate
Författare
Yuliya Kalmykova
FRIST kompetenscentrum
Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik
Sebastien Rauch
Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik
Ann-Margret Hvitt Strömvall
Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik
FRIST kompetenscentrum
Greg Morrison
Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik
Björn Stolpe
Göteborgs universitet
Martin Hassellöv
Göteborgs universitet
Water Environment Research
1061-4303 (ISSN) 15547531 (eISSN)
Vol. 82 6 506-511Ämneskategorier (SSIF 2011)
Kemi
DOI
10.2175/106143009X12529484815430