| Title |
A Study on Recovery of Anionic Surfactant in Effluent Discharged by Soil Washing Treatment |
| Authors |
최상일 ( Choe Sang Il ) ; 공준 ( Gong Jun ) ; 조장환 ( Jo Jang Hwan ) |
| Keywords |
Soil Washing; Washing Effluent; Anionic Surfactant; Sodium Dodecyl Sulfate; Surfactant Recovery |
| Abstract |
Monovalent sodium, divalent calcium and trivalent aluminum cations were used to recycle 0.0694M sodium dodecyl sulfate based on stoichiometric level. The calcium and aluminum dodecyl sulfate precipitate has a very low solubility in water and can not be directly recycled to the surfactant based separation. It must be transformed to the monovalent salt before it can be redissolved in water for recycle. Therefore, sodium carbonate solution was added to a slurry of the precipitated calcium and aluminum dodecyl sulfate for optimizing applied sodium carbonate. The washing test was performed to compare recycled anionic surfactants to the original amount. As diesels desorted from diesel containing soil have a sensitive effect on the precipitation of surfactant by hydrophobic affinity, the experiment was also conducted to determine the application range of diesel and minimize recycle loss of anionic surfactant. |