微波-吸波介质处理焦化废水中低环PAHs
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摘要
以焦化废水中低环PAHs为研究对象,通过微波和吸波介质协同作用分析微波加热时间、不同种类和质量的吸波介质对焦化废水中各低环PAHs处理效果的影响。结果表明,微波加热时间在6～9 min时各低环PAHs去除效果最理想,二环PAHs最高去除率为59%,三环PAHs去除率为70%。在微波作用下,黑碳化硅作为吸波介质对低环PAHs去除效果最好。黑碳化硅质量为5 g时,低环PAHs总去除率为40%,二环PAHs最高去除率为40%,三环PAHs去除率为50%,四环PAHs质量分数很少,基本保持不变。
Taking low-ring PAHs contained in coking wastewater as study object,the effects of microwave heating time and different kinds and qualities of wave-absorbing mediums on the treatment efficiency of low-ring PAHs in coking wastewater are analyzed through the synergistic action of microwave and wave absorbing medium. It is shown that when microwave heating time is in the range of 6-9 minutes,the excellent removal efficiency of low-ring PAHs can be achieved,with the highest removal rate of 59% for bi-cyclic PAHs and a removal rate of 70% for tri-cyclic PAHs.Under microwave irradiation,black silicon carbide as a wave absorbing medium gives the best removal effect of low-ring PAHs.The total removal rate of low-ring PAHs can reach 40%,the highest removal rate of bicyclic PAHs is 40%,the removal rate of tricyclic PAHs is 50%,and the content of tetracyclic PAHs is very small and remains basically unchanged when the mass of black silicon carbide is 5 g.
Taking low-ring PAHs contained in coking wastewater as study object,the effects of microwave heating time and different kinds and qualities of wave-absorbing mediums on the treatment efficiency of low-ring PAHs in coking wastewater are analyzed through the synergistic action of microwave and wave absorbing medium. It is shown that when microwave heating time is in the range of 6-9 minutes,the excellent removal efficiency of low-ring PAHs can be achieved,with the highest removal rate of 59% for bi-cyclic PAHs and a removal rate of 70% for tri-cyclic PAHs.Under microwave irradiation,black silicon carbide as a wave absorbing medium gives the best removal effect of low-ring PAHs.The total removal rate of low-ring PAHs can reach 40%,the highest removal rate of bicyclic PAHs is 40%,the removal rate of tricyclic PAHs is 50%,and the content of tetracyclic PAHs is very small and remains basically unchanged when the mass of black silicon carbide is 5 g.
引文
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[3]杨发忠,颜阳,张泽志,等.多环芳烃研究进展[J].云南化工,2005,2:44-48.
[4]王菲.多环芳烃污染土壤的微生物修复对微生物种群的影响[D].青岛:中国海洋大学,2010.
[5]Wei C,Bandowe B A,Han Y,et al. Polycyclic aromatic hydrocarbons(PAHs)and their derivatives(alkyl-PAHs,oxygenated-PAHs,nitrated-PAHs and azaarenes)in urban road dusts from Xi'an,Central China[J].Chemosphere,2015,134:512-520.
[6]王薛平.上海市地表水体中多环芳烃与多氯联苯的环境行为与风险研究[D].上海:华东师范大学,2017.
[7]石焱,赵鑫,冯英英,等.微波-吸波介质处理炼焦烟气中五环多环芳烃[J].现代化工,2017,37(12):76-78,80.
[8]Liu Zuohua,Tao Changyuan,Liu Renlong,et al.Study on treatment of landfill leachate aided by microwave fenton process[J]. Piezoelectrics and Acoustooptics,2007,29(3):344-349.
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[10]Vitthal L Gole,Gole V L,Gogate P R.Intensification of glycerolysis reaction of higher free fatty acid containing sustainable feedstock using microwave irradiation[J].Fuel Processing Technology,2014,118:110-116.