Immobilization of Potentially Toxic Elements in Contaminated Soils Using Thermally Treated Natural Zeolite
| Autor: | Anamaria Iulia Török, Oana Cadar, Zamfira Dinca, Erika Andrea Levei, Marin Senila, Florin Todor |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Technology
Amendment Fraction (chemistry) 02 engineering and technology 010501 environmental sciences complex mixtures 01 natural sciences Article soil natural zeolite General Materials Science Zeolite 0105 earth and related environmental sciences toxic elements Microscopy QC120-168.85 Contaminated soils Chemistry QH201-278.5 Extraction (chemistry) Contamination Engineering (General). Civil engineering (General) 021001 nanoscience & nanotechnology Soil contamination TK1-9971 Bioavailability Descriptive and experimental mechanics Environmental chemistry immobilization Electrical engineering. Electronics. Nuclear engineering TA1-2040 0210 nano-technology thermal treatment |
| Zdroj: | Materials, Vol 14, Iss 3777, p 3777 (2021) Materials Volume 14 Issue 14 |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14143777 |
| Popis: | Rehabilitation of contaminated soils is a complex and time-consuming procedure. One of the most cost-effective and easy-to-use soil remediation approaches is the use of amendments that stabilize the potential toxic elements (PTE) in soil by reducing their mobility and bioavailability. The stabilization of Cu, Pb, Zn, Cd, Co, Cr, Ni in a contaminated soil using 5% and 10% amendment with thermally treated natural zeolite was investigated using a sequential extraction procedure, contamination and environmental risk factors. The results showed that after amendment, the PTE concentration decreased in the exchangeable and reducible fractions and increased in the oxidizable and residual fractions. The highest immobilization effect, consisting in the decrease of exchangeable fractions with 69% was obtained in case of 10% zeolite amendment and 90 days of equilibration time for Pb also, more than half of the mobile fraction was immobilized in case of Zn, Cu, and Co and about one third in case of Ni, Cr, and Cd. Generally, the immobilization effect of the 5% and 10% amendment is comparable, but a higher equilibration time enhanced the immobilization effect, especially in the case of Cd, Co, Cu, Pb, and Zn. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|