Effective treatment of nitrogen-containing pollutants in industrial wastewater and sludge has become an important environmental issue.The typical nitrogen-containing compound quinoline was employed to explore the enhanced degradation effects of active alcohols(methanol,ethylene glycol,and glycerol)during supercritical water oxidation(SCWO)of quinoline.The influences of reaction parameters on degradation of carbon and nitrogen in quinoline were studied.The SCWO reaction path of quinoline was analyzed.The results show that the XTOC and XTN for SCWO of 1.125％wt quinoline with 800 mmol·L-1 methanol were,respectively,95.9％and 62.7％at pressure of 25 MPa,oxidation coefficient of 1.5,and reaction temperature of 450 ℃,whereas only 71.6％and 56.2％were attained in the pure quinoline reaction.Increasing the reaction temperature and oxidation coefficient can improve the kinetic effect of methanol.In addition,the comparison of the enhanced degradation effects of methanol,ethylene glycol,and glycerol indicates that,due to the superior kinetic and thermal effects of polyols,the order of three alcohols'promotion effects on quinoline oxidation was CH3OH＜(CH2OH)2＜C3H8O3.Finally,SCWO of quinoline was initiated by ring opening of the pyridine ring,and conducted hydroxylation,bond breaking and ring opening reactions.
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