Cadmium retention and distribution in contaminated soil: effects and interactions of soil properties, contamination level, aging time and in situ immobilization agents
| Autor: | Antonije Onjia, Jelena Markovic, Marija Z. Šljivić-Ivanović, Mihajlo Jović, Katarina Trivunac, Aleksandar Popović, Ivana Smičiklas |
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| Rok vydání: | 2018 |
| Předmět: |
Time Factors
Speciation Health Toxicology and Mutagenesis Biological Availability Environmental pollution 010501 environmental sciences complex mixtures 01 natural sciences Phosphates Calcium Hydroxide Soil Soil pH Cation-exchange capacity Animals Soil Pollutants Fertilizers Environmental Restoration and Remediation 0105 earth and related environmental sciences 2. Zero hunger Chemistry Public Health Environmental and Occupational Health Soil classification 04 agricultural and veterinary sciences General Medicine Soil types Contamination Soil type Contamination levels Pollution Soil contamination 13. Climate action Aging time Environmental chemistry Chemical immobilization Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Cadmium |
| Zdroj: | Ecotoxicology and Environmental Safety |
| ISSN: | 1090-2414 |
| Popis: | As soil cadmium (Cd) contamination becomes a serious concern and one of the significant environmental pollution issues all over the world, knowledge of the basic chemistry, origin, inputs, sources, quantity, chemical forms, reactions, as well as the fate and transport of Cd in different types of soil is crucial for better understanding Cd bioavailability, health risks and remedial options. This study aimed to increase the current knowledge on the complex interdependence between the factors affecting behavior, transport and fate of Cd in the soil and to test and compare the performance of the stabilization agents in different soil types. Soils demonstrated various sorption affinity and capacity for Cd accumulation, which proved to be positively correlated with soil pH and the cation exchange capacity (CEC). With increasing levels of contamination, sequential extraction analysis showed the highest increase of relative Cd amounts in the exchangeable fraction regardless of the soil properties, suggesting that added Cd is principally associated with the easily accessible and mobile fraction. For different initial Cd concentrations and soil types, Cd sorption reached the quasi-equilibrium within 24 h of contact. Prolonged aging (two months) influenced the natural stabilization of Cd in all types of soil, but only at low contamination level. The application of both, conventional (slaked lime Ca(OH) 2 ) and alternative phosphate-rich (annealed bovine bones B 400 ) amendments, resulted in Cd relocation and reduction of exchangeable Cd content. Although the effect was smaller when apatite amendment was utilized, observed re-distribution of Cd to more stable soil fractions is preferable for achieving long-term stabilization. Cd concentrations extracted in exchangeable and acid soluble fractions after the treatments of contaminated soil samples suggest that the practical applicability of in situ immobilization depends on the soil properties and the level of contamination, as well as that effect, should be monitored for the possible re-mobilization of Cd. Supplementary material: [http://cherry.chem.bg.ac.rs/handle/123456789/2876] |
| Databáze: | OpenAIRE |
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