Chromium Removal Using Soil Loaded with Green Iron Nanoparticles
Autor: | Nymphodora Papassiopi, D. Dermatas, Thanasis Mpouras, Christiana Mystrioti |
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Rok vydání: | 2020 |
Předmět: |
Chromium
Soil test Environmental remediation Iron Health Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences Toxicology 01 natural sciences Soil chemistry.chemical_compound Hexavalent chromium Environmental Restoration and Remediation 0105 earth and related environmental sciences Detection limit Chromate conversion coating Chemistry 04 agricultural and veterinary sciences General Medicine Pollution Permeable reactive barrier Environmental chemistry 040103 agronomy & agriculture Nanoparticles 0401 agriculture forestry and fisheries Calcareous Water Pollutants Chemical |
Zdroj: | Bulletin of Environmental Contamination and Toxicology. 106:453-457 |
ISSN: | 1432-0800 0007-4861 |
DOI: | 10.1007/s00128-020-02969-9 |
Popis: | Chromate is considered as a serious environmental problem due its toxicity. Iron nanoparticles produced by green tea polyphenols (GT-nZVI) is a powerful reductant, which can effectively reduce Cr(VI) to Cr(III). Nano ZVI suspension was initially conceived ideal for direct injection in the contaminated aquifers. However GT-nZVI presents limited mobility in calcareous aquifers. For this reason the incorporation of nanoiron in a permeable reactive barrier was investigated as an alternative mode of GT-nZVI application. Namely an amount of soil was loaded with nZVI (0.40 mmol/g of soil) and was evaluated for Cr(VI) removal by conducting batch and column tests. Batch tests were carried out by mixing soil samples, loaded with different levels of nZVI from 0.04 to 0.40 mmol per gram, with contaminated groundwater (GW) containing 1300 ppb Cr(VI). Cr(VI) concentration dropped below detection limit within 1 day using the highest nZVI dose. Soil pre-loaded with nZVI (S-nZVI) presented also high efficiency for chromates remediation, when tested under flow conditions by conducting column tests. |
Databáze: | OpenAIRE |
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