Life cycle exposure of plants considerably affects root uptake of PCBs: Role of growth strategies and dissolved/particulate organic carbon variability
| Autor: | Antonio Di Guardo, Elisa Terzaghi, Elisabetta Zanardini, Cristiana Morosini, Simone Anelli, Stefano Armiraglio, Giuseppe Raspa |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Environmental Engineering
Perennial plant Health Toxicology and Mutagenesis Greenhouse Ecological realism Environmental fate models Food chain transfer RCF Risk assessment Root concentration factor Animals Carbon Life Cycle Stages Plant Roots Soil Polychlorinated Biphenyls Soil Pollutants Food chain Dissolved organic carbon Environmental Chemistry Waste Management and Disposal Particulate organic carbon Contamination Pollution Soil contamination Environmental chemistry Root uptake Environmental science |
| Popis: | Plant roots can accumulate organic chemicals, including PCBs, and this could be relevant in spreading chemicals through the food chain. To estimate such uptake, several equations are available in the literature, mostly developed in lab conditions, to obtain the root concentration factor (RCF). Here, a long-term (18 months) greenhouse experiment, using an aged, contaminated soil, was performed to reproduce root uptake in field-like conditions and to account for the ecological variability of exposure during the entire life cycle. Specific growth strategies (i.e., annual vs. perennial), root development (e.g., timing of root production and decaying), and soil parameters (e.g., dissolved organic carbon (DOC), and the particulate organic carbon (POC)) may interfere with the uptake of contaminants into the roots of plants. In this study, we investigate the effects of these factors on the RCF, obtained for 79 PCBs. New predictive equations were calculated for 5 different plants species at four different growth times (from few months to 1.5 years) and stages (growing vs maturity). The relationships highlighted a species-specific and time-dependent accumulation of PCB in plants roots, with higher RCFs in summer than in fall for some species, and the relevant influence of DOC and POC in affecting root uptake. |
| Databáze: | OpenAIRE |
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