|
Degradation of Humic acid from aqueous solution by Fenton reaction and microbiological technique |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Thassawathas Suchaiya 2. Prapakorn Krongthong 3. Nuttawan Yoswathana 4. Woranart Jonglertjunya |
| Title | Degradation of Humic acid from aqueous solution by Fenton reaction and microbiological technique |
| Publisher | Faculty of Engineering, Khon Kaen Univeristy |
| Publication Year | 2553 |
| Journal Title | KKU Engineering Journal |
| Journal Vol. | 37 |
| Journal No. | 3 |
| Page no. | 247-255 |
| Keyword | Humic acid, Fenton reaction,Pseudomonas fluorescens, Lactococcus lactis |
| ISSN | 0125-8273 |
| Abstract | Humic substances (HS) are the components in soils, sediments, and waters (ground and surface water) and they are formed by the decay of plant, animal and microbial cell. The presence of humic substances may result in the formation of trihalomethanes (THMs) during the chlorination process in drinking water supplies. THMs are identified as a human carcinogen compound by the US Environmental Protection Agency (US EPA). The degradation of humic acid (HA) from synthetic humic acid solutions was carried out by Fenton reaction and microbiological technique. The Fenton reaction is the formation of hydroxyl radicals (}OH) from the catalytic decomposition of hydrogen peroxide (H2O2) by soluble ferrous ion (Fe2+). The hydroxyl radicals (}OH) is a strong oxidizing agent for the destruction of organic pollutants. At pH 3.0 of Fenton solution showed the maximum percentage of HA solution removal from the humic acid solution. The optimal ratio of HA:H2O2:Fe2+ for extracted HA solution appeared to be 1:560:140 giving the maximum HA removal of 66 % at reaction time of 180 minutes. The two microorganisms; Pseudomonas fluorescens (P. fluorescens) andLactococcus lactis (L. lactis) were evaluated for degradation of HA. The highest HA removal from solution was observed when P. fluorescens was used as a single culture, with 33% efficiency within 27 days treatment. |
