Back to Search
Start Over
Phytotoxicity assays with hydroxyapatite nanoparticles lead the way to recover firing range soils
- Source :
- The Science of the total environment. 690
- Publication Year :
- 2019
-
Abstract
- Shooting activities is an important source of Pb in contaminated soils. Lead accumulates in superficial soil horizons because of its low mobility, favouring its uptake by plants and representing a high transference risk to the trophic chain. A combination of phytoremediation with nanoremediation techniques can be used to recover firing range soils and decrease the mobility, bioavailability and toxicity of Pb. This study examines in depth the changes in Pb behaviour in firing range soils by adding hydroxyapatite nanoparticles (HANPs). These nanoparticles (NPs) may immobilise Pb and improve the quality of these areas. The use of HANPs and the Pb effects were assessed in three different species (Sinapis alba L., Lactuca sativa L. and Festuca ovina L.), focusing on their germination and early growth, through phytotoxicity assays. Single extractions with CaCl2 (0.01 M) in soils treated with HANPs show that these NPs retained Pb and reduced highly its availability and mobility. HR-TEM and TOF-SIMS were used to determine the interactions between HANPs and Pb, as well as with soil components. According to TOF-SIMS and HR-TEM/EDS analysis, Pb was mainly retained by HANPs but also associated lightly to organic matter, Fe compounds and silicates. Phytotoxicity assays exposed that S. alba, L. sativa and F. ovina were able to germinate and develop in the firing range soils despite the high available Pb contents before adding HANPs. After adding HANPs, Pb retention increased, favouring the germination and the growth of roots in the three species. These results suggest that HANPs can be used to decrease the availability and the toxicity of Pb without negative effects in the species growth. Accordingly, the combination of phytoremediation and nanoremediation techniques can be a great tool to stabilise these soils, avoiding the Pb transfer to nearby areas and its entry in the trophic chain.
- Subjects :
- Environmental Engineering
010504 meteorology & atmospheric sciences
010501 environmental sciences
01 natural sciences
Soil
Environmental Chemistry
Soil Pollutants
Organic matter
Nanoremediation
Waste Management and Disposal
Environmental Restoration and Remediation
0105 earth and related environmental sciences
chemistry.chemical_classification
biology
Plants
biology.organism_classification
Pollution
Phytoremediation
Durapatite
chemistry
Lead
Germination
Environmental chemistry
Soil water
Soil horizon
Nanoparticles
Festuca ovina
Phytotoxicity
Biological Assay
Weapons
Subjects
Details
- ISSN :
- 18791026
- Volume :
- 690
- Database :
- OpenAIRE
- Journal :
- The Science of the total environment
- Accession number :
- edsair.doi.dedup.....454a845b4f86b3b144c4f159c45e60f5