Jones Sarah, Bardos R Paul, Kidd Petra S, Mench Michel, de Leij Frans, Hutchings Tony, Cundy Andrew, Joyce Chris, Soja Gerhard, Friesl-Hanl Wolfgang, Herzig Rolf, Menger Pierre
r3 Environmental Technology UK Ltd, H9 TOB1, University of Reading Whiteknights Campus, Reading, UK.
Instituto de Investigaciones Agrobiológicas de Galicia (IIAG), Consejo Superior de Investigaciones Científicas (CSIC), Santiago de Compostela, 15706, Spain.
J Environ Manage. 2016 Apr 15;171:101-112. doi: 10.1016/j.jenvman.2016.01.024. Epub 2016 Feb 2.
Contamination of soil with trace elements, such as Cu, is an important risk management issue. A pot experiment was conducted to determine the effects of three biochars and compost on plant growth and the immobilisation of Cu in a contaminated soil from a site formerly used for wood preservation. To assess Cu mobility, amended soils were analysed using leaching tests pre- and post-incubation, and post-growth. Amended and unamended soils were planted with sunflower, and the resulting plant material was assessed for yield and Cu concentration. All amendments significantly reduced leachable Cu compared to the unamended soil, however, the greatest reductions in leachable Cu were associated with the higher biochar application rate. The greatest improvements in plant yields were obtained with the higher application rate of biochar in combination with compost. The results suggest joint biochar and compost amendment reduces Cu mobility and can support biomass production on Cu-contaminated soils.
土壤被铜等微量元素污染是一个重要的风险管理问题。进行了一项盆栽试验，以确定三种生物炭和堆肥对植物生长以及铜在一个曾用于木材防腐场地的污染土壤中的固定作用的影响。为评估铜的迁移性，在培养前后以及生长后使用淋溶试验对改良土壤进行分析。改良和未改良的土壤都种植了向日葵，并对收获的植物材料进行产量和铜浓度评估。与未改良土壤相比，所有改良措施都显著降低了可淋溶铜，但可淋溶铜的最大降幅与较高的生物炭施用量有关。生物炭施用量较高并与堆肥结合时，植物产量得到了最大程度的提高。结果表明，联合使用生物炭和堆肥进行改良可降低铜的迁移性，并能促进铜污染土壤上的生物质生产。
