Abstract
In this study, the degradation of humic acid (HA) extracted from soil in aqueous solution was carried out using the Fenton reaction and a microbiological technique. The Fenton reaction produced hydroxyl radicals (•OH) from the catalytic decomposition of hydrogen peroxide (H 2O 2) by the soluble ferrous ion (Fe 2+) for use in the destruction of organic pollutants. At pH 3.0, the ratios of HA and H 2O 2 of 1:560 and the H2O2 and Fe 2+ ratios of 5:1 showed the maximum percentage of HA removal. Thus, the optimal ratio of HA:H 2O 2:Fe 2+ for HA removal appeared to be 1:560:112. However, the highest HA removal per gram of soil was 30% after 3 h when using a ratio of humic acid to reagents (H 2O 2 and Fe 2+) of 1:11200:2240. The comparative evaluation of two microorganisms Pseudomonas fluorescens and Lactococcus lactis for the degradation of HA indicated the highest removal of about 28% when using Lactococcus lactis as a single culture for soil samples within 20 d.
| Original language | English |
|---|---|
| Pages (from-to) | 1069-1078 |
| Number of pages | 10 |
| Journal | Kasetsart Journal - Natural Science |
| Volume | 44 |
| Issue number | 6 |
| Publication status | Published - Nov 2010 |
Keywords
- Fenton reaction
- Humic acid
- Lactococcus lactis
- Pseudomonas fluorescens
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