Soluble organic substances extracted from compost as amendments for Fenton-like oxidation of contaminated sites
| Autor: | Daniela Zingaretti, Renato Baciocchi, Francesco Lombardi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Chlorophenol
Pollutant Environmental Engineering Settore ICAR/03 - Ingegneria Sanitaria-Ambientale Environmental remediation Compost Metal ions in aqueous solution Amendment 02 engineering and technology 010501 environmental sciences engineering.material 021001 nanoscience & nanotechnology complex mixtures 01 natural sciences Pollution chemistry.chemical_compound chemistry Environmental chemistry engineering Environmental Chemistry Chelation 0210 nano-technology Waste Management and Disposal 0105 earth and related environmental sciences Stabilizer (chemistry) |
| Zdroj: | Science of The Total Environment. :1366-1374 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2017.11.178 |
| Popis: | The Fenton process is a well known treatment that proved to be effective for the remediation of sites contaminated by a wide range of organic pollutants. Its application to soil-water systems typically requires the addition of a stabilizer, in order to increase the H2O2 lifetime and thus the radius of influence of the treatment, and a chelating agent, aimed to extract and maintain in solution the iron present in the soil. However, as the use of these compounds has been debated for their environmental impact, efforts have been placed to test new "greener" amendments. Namely, in line with the concept of circular economy introduced by the European Council, in this study we have tested the use of humic acids extracted from compost as amendment in a Fenton-like process. These substances are of potential interest as can form complexes with metal ions and act as sorbents for hydrophobic organic compounds. Fenton-like lab-scale tests with the extracted humic acids were performed on a soil-water system artificially contaminated by chlorophenol. The obtained results were compared with those achieved applying commercial humic acids or traditional amendments (i.e. KH2PO4 or EDTA) used as reference. The humic acids extracted from compost allowed to achieve a H2O2 lifetime close to the one obtained with traditional stabilizing agent; besides, humic acids proved also effective in removing chlorophenol, with performance close to the one achieved using a traditional chelating agent. These findings hence suggest that the use of the humic acids extracted from wastes in a Fenton-like process could allow to replace at the same time the H2O2 stabilizer and the chelating agent. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect