Dechlorination of chloro-organics from E-1 effluents by sonolysis
- North Carolina State Univ., Raleigh, NC (United States)
Degradation of chloro-organics in bleach plant E-1 effluents by ultrasound sonication was investigated to evaluate the effects of ultrasonic treatment on the dechlorination. On sonolysis, ca. 65 mol% of 4-chlorophenol at concentration of 10{sup -4} M in aqueous solution was decomposed and ca. 35 mol% of chlorine in the substrate was released as chloride ions (Cl{sup -}) at the reaction time of 80 min at room temperature under the atmospheric pressure. By contrast, the decomposition rates were appreciably low at the concentrations of 10{sup -3} M and 10{sup -2} M. The kinetics for the disappearance of 1 follows the first-order law. However, it is dependent of the initial concentration. The addition of hydrogen peroxide, does not affect appreciably the kinetics for the disappearance of 1. On sonolysis, polychlorinated oxylignins (PCOLs) isolated from E-1 effluent were appreciably dechlorinated. The high relative mass PCOL released larger amounts of chloride ions than the low relative mass PCOL. The sonolysis resulted only in small decrease in the relative mass of PCOLs, indicating that no significant degradation of PCOLs occurred except for the release of chloride ions.
- OSTI ID:
- 370074
- Report Number(s):
- CONF-960376-; TRN: 96:003805-0125
- Resource Relation:
- Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of 211th ACS national meeting; PB: 2284 p.
- Country of Publication:
- United States
- Language:
- English
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