| Title |
The Biodegradations of Synthetic Surfactants , Shampoos , Fatty - Acids and Soaps in Water |
| Authors |
정용 ; 이자경 ; 최윤호 ( Yong Chung ; Ja Kyoung Lee ; Yoon Ho Choi ) |
| Abstract |
This study were conducted to compare the biodegradability of synthetic surfactants(8 kinds), shampoos(total 12 kinds - foregins; 3, homes;9) and the fatty acids soaps(8 kinds). The biodegradation of anionic surfactants was tested by aeiation method which was inclosed bubbling and shaking methods for activated sludge cultivation and the quantities of surfactants were analysed by MBAS(Methylene Blue Active Substances) method. The biodegradation of soaps was determined by using analysis of the fatty acids derivations with p-BPB which was detected with HPLC/UV. SLS(Sodium Laury Sulfate), ALS(Ammonium Laury Sulfate), natural SLES(Sodium Laury Ether Sulfate), SCI(Sodium Cocoyl Isothionate), acyl N-methyl sodium taurate(natural synthetic surfactants) were degradated more than 99% after 24 hrs. The components of the synthetic surfactants(petroleum or natural palm oil sources) significantly affected to the initial biodegradation rates of shampoos. The biodegradabilities of the fatty acid and soaps were differently depended upon the water hardness : soft water ; l2 hrs, hard water ; 18 hrs for 99% biodegradations. But natural SLS was degradated to 99% whithin 9 hrs. |