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.