| RRC ID |
53486
|
| Author |
Fajardo C, Gil-Díaz M, Costa G, Alonso J, Guerrero AM, Nande M, Lobo MC, Martín M.
|
| Title |
Residual impact of aged nZVI on heavy metal-polluted soils.
|
| Journal |
Sci Total Environ
|
| Abstract |
In the present study, the residual toxicity and impact of aged nZVI after a leaching experiment on heavy metal (Pb, Zn) polluted soils was evaluated. No negative effects on physico-chemical soil properties were observed after aged nZVI exposure. The application of nZVI to soil produced a significant increase in Fe availability. The impact on soil biodiversity was assessed by fluorescence in situ hybridization (FISH). A significant effect of nZVI application on microbial structure has been recorded in the Pb-polluted soil nZVI-treated. Soil bacteria molecular response, evaluated by RT-qPCR using exposure biomarkers (pykA, katB) showed a decrease in the cellular activity (pykA) due to enhanced intracellular oxidative stress (katB). Moreover, ecotoxicological standardised test on Caenorhabditis elegans (C. elegans) showed a decrease in the growth endpoint in the Pb-polluted soil, and particularly in the nZVI-treated. A different pattern has been observed in Zn-polluted soils: no changes in soil biodiversity, an increase in biological activity and a significant decrease of Zn toxicity on C. elegans growth were observed after aged nZVI exposure. The results reported indicated that the pollutant and its nZVI interaction should be considered to design soil nanoremediation strategies to immobilise heavy metals.
|
| Volume |
535
|
| Pages |
79-84
|
| Published |
2015-12-1
|
| DOI |
10.1016/j.scitotenv.2015.03.067
|
| PII |
S0048-9697(15)00342-3
|
| PMID |
25863574
|
| MeSH |
Animals
Caenorhabditis elegans
Environmental Monitoring
Environmental Restoration and Remediation / methods*
Iron
Metal Nanoparticles / analysis*
Metal Nanoparticles / toxicity
Metals, Heavy / analysis
Metals, Heavy / chemistry
Soil Microbiology
Soil Pollutants / analysis*
Soil Pollutants / chemistry
Soil Pollutants / toxicity
|
| IF |
5.589
|
| Times Cited |
35
|
| Resource |
| C.elegans |
NA |
