The effects of additional oxidants,such as NaNO3,Na2S2O3,KC1O4,and K2Cr2O7,on the supercrit-ical water oxidation(SCWO)of tributyl phosphate(TBP)were studied.The coupling of an ionic oxidant with SCWO can effectively enhance the oxidative degradation ability of the system,thus increasing its organic-matter-removal efficiency at a reduced reaction temperature.Moreover,the addition of NaNO3,KC1O4,or K2Cr2O7 could improve this efficiency at a reaction temperature of 500℃compared with that of the original system at 550℃.Additionally,based on the conditions adopted in this study,the addition of either of these oxidants could reduce the final total organic carbon(TOC)of the effluent from～500 to＜100 ppm.Concurrently,the ionic oxidants could effec-tively improve the processing capacity of the SCWO sys-tem to reduce the scale of the equipment,as well as the amount of produced wastewater.Compared with KC1O4 and Na2S2O3,the addition of 10 mmol/L NaNO3 and K2Cr2O7 to the organic feed could increase the processing capacity of the system from 4 to 10％while maintaining the TOC removal at＞99％.The effects of the ionic oxidants on the gas products,including CO2,CO,H2,and CH4,as well as other organic gases,have also been studied.Among these gas products,CO2 accounted for the main gas product with a proportion of more than half.At＜500℃,tem-perature significantly affected the as products(CO,H2,CH4,and other organic gases).However,the gas product was mainly CO2 when the temperature was increased to≥500℃.This study initially revealed the enhancement effect of ionic oxidants on SCWO,which still requires further research.

Qiang Qin;Xiao-Bin Xia;Shi-Bin Li;Shuai Wang;Hong-Jun Ma

Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China

核技术（英文版）

[1]Qiang Qin;Xiao-Bin Xia;Shi-Bin Li;Shuai Wang;Hong-Jun Ma-.Effects of oxidants on the degradation of tributyl phosphate under supercritical water oxidation conditions)[J].核技术（英文版）,2022(03):160-171

KC1O4,supercrit

Effects,oxidants,degradation,tributyl,phosphate,under,supercritical,oxidation,conditions,effects,additional,such,NaNO3,Na2S2O3,K2Cr2O7,SCWO,TBP,were,studied,coupling,ionic,effectively,oxidative,ability,system,thus,increasing,its,organic,matter,removal,efficiency,reduced,reaction,temperature,Moreover,could,improve,this,compared,that,original,Additionally,adopted,study,either,these,final,total,carbon,TOC,effluent,from,ppm,Concurrently,processing,capacity,scale,equipment,well,amount,produced,wastewater,Compared,feed,while,maintaining,products,including,H2,CH4,other,gases,have,also,been,Among,accounted,proportion,more,than,half,At,significantly,affected,However,mainly,when,increased,This,initially,revealed,enhancement,which,still,requires,further,research

0.410563