Assessment of Cu stabilisation in a contaminated soil from a wood preservative treatment site using the PlantTox test
Copper was main metal contaminant (2600μg·g 1) limiting plant growth in the topsoil of a barren area at a wood treatment site. Stabilisation of Cu is a relevant soil remediation option, especially in the purpose to further use phytostabilisation and to restore plant community with a high biodiversity. Therefore, soil amendments were either singly or in combination mixed into this high Cu contaminated soil. Their effectiveness at reducing root exposure to Cu and promoting plant growth was assessed using the PlantTox test with Phaseolus vulgaris. Amendments with organic matter (OM) or increasing pH were the most efficient for Cu stabilisation whereas amendments with phosphates or decreasing pH were not effective. Most efficient treatments immobilised Cu up to 99％ and restored plant growth. Less efficient treatments increased Cu in soil solution (4. 5 times), peroxidase activity in bean roots due to oxidative stress, and chlorophyll densities in leaves due to their small development. For Cu stabilisation in such contaminated soil, Ca oxide, Thomas basic slags, and OM singly or in combination with zerovatent iron grit were recommended to be tested in field experiment.
Aided phytostabilisation Phaseolus vulgafis L. oxidative stress soil amendment soil solution
C. Bes M. Mench
UMR BIOGECO INRA 1202, Ecology of Communities, University of Bordeaux 1, Bat B8, RdC Est, avenue des Facultes, F-33405 Talence, France
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
950-951
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）