THE ROLE OF HUMIC-ACID ON SULFATE RETENTION AND RELEASE IN A PODZOL

Authors
COURCHESNE F GOBRAN GR DUFRESNE A
Citation
F. Courchesne et al., THE ROLE OF HUMIC-ACID ON SULFATE RETENTION AND RELEASE IN A PODZOL, Water, air and soil pollution, 85(3), 1995, pp. 1813-1818
Citations number
9
Categorie Soggetti
Environmental Sciences","Water Resources
Journal title
Water, air and soil pollution → ACNP
ISSN journal
00496979
Volume
85
Issue
3
Year of publication
1995
Pages
1813 - 1818
Database
ISI
SICI code
0049-6979(1995)85:3<1813:TROHOS>2.0.ZU;2-X
Abstract
Sequential leaching experiments were performed to evaluate the effects of humic acid (HA) and pH on SO4 retention and release in a Swedish p odzolic B-horizon. Results showed that the presence of HA reduced SO4 retention and that HA was released when SO4 was retained. Increasing H A concentration increased the rate of SO4 release. The ability of HA t o compete with SO4 increased with pH. More than 40% of total sorbed SO 4 was irreversibly retained.