Reactive trace element enrichment in a highly modified, tidally inundated acid sulfate soil wetland: East Trinity, Australia |
| |
Authors: | Annabelle F. Keene Scott G. Johnston Richard T. Bush Edward D. Burton Leigh A. Sullivan |
| |
Affiliation: | Southern Cross GeoScience, Southern Cross University, P.O. Box 157, Lismore NSW 2480, Australia |
| |
Abstract: | This study examines the abundance of trace elements in surface sediments of a former acid sulfate soil (ASS) wetland subjected to marine tidal inundation. Sediment properties of this highly modified study site are compared with those of an adjacent unmodified, intertidal mangrove forest. Whilst some trace elements (Al, Cd, Mn, Ni and Zn) were clearly depleted due to mobilisation and leaching in the previous oxic-acidic phase, other trace elements (As and Cr) displayed significant enrichment in the tidally inundated ASS. Many trace elements were strongly associated with the reactive Fe and acid volatile sulfide (AVS) fractions, suggesting that trace elements may be adsorbed to abundant reactive Fe phases or sequestered as sulfide minerals. These findings provide an important understanding of the fate and mobility of reactive iron, AVS and trace elements during tidal remediation of a formerly acidified Great Barrier Reef (GBR) catchment. |
| |
Keywords: | Acid sulfate soils Reactive iron Acid volatile sulfides Tidal inundation Wetland East Trinity |
本文献已被 ScienceDirect 等数据库收录! |
|