Abstract
The effects of changes in environmental temperatures on the immobilization or removal of potentially toxic elements (PTE) in polluted soils are often poorly understood, although both are widely studied in the context of phytostabilization. A formulation of halloysite-compost amendments (HCA) was developed and applied for assisted phytostabilization at two external temperature regimes. PTEs contaminated soils were cultivated with perennial ryegrass and native soil microbiome under greenhouse conditions and then transferred to freeze-thaw conditions (FTC). The decrease in PTEs in soils undergoing phytostabilization following both temperature treatments was characterized by a combination of sequential extraction and atomic absorption measurements. The soil microbiome was characterized by high-throughput sequencing. In a relative comparison, the greatest decrease in the content of all different PTEs in HCA-enriched soil was highest in FTC. Furthermore, under the influence of FTC, in a relative comparison between two HCA-enriched soils and two unenriched soils, the content of all PTEs decreased more sharply in the HCA-enriched series than in the unenriched series.
Presenters
Maja RadziemskaProfessor, Institute of Environmental Engineering, Warsaw University of Life Sciences - SGGW, Poland Barbara Klik
Assistant Professor, Institute of Environmental Engineering, Warsaw University fo Life Sciences, Mazowieckie, Poland
Details
Presentation Type
Theme
Technical, Political, and Social Responses
KEYWORDS
PTE Immobilization, PTE removal, Phytostabilization Temperatures, Amendment-base stabilization, Rhizosphere-base stabilization
