考察了高温热解法制备的氮锰共掺生物炭协同过硫酸盐降解水中新兴污染物安塞蜜的效能与机制。表征结果表明,氮锰共掺生物炭具有良好的比表面积与孔径结构。实验结果表明,氮锰共掺生物炭协同过硫酸盐能够显著提升水中安塞蜜的降解率,表现出更高的降解效能;在催化剂投加质量浓度为2.5 g/L、过硫酸盐浓度为8 mmol/L及不改变初始溶液pH的条件下,120 min时对安塞蜜的去除率高达94.17%。降解反应以硫酸根自由基为主导自由基。氮锰共掺生物炭具有良好的活化性能和回收利用率。

The efficacy and mechanism of nitrogen/manganese co-doped biochar,which is prepared via high-temperature pyrolysis,together with persulfate for the synergistic degradation of acesulfame-K,an emerging pollutant,in water are investigated.Characterization results show that the nitrogen-manganese co-doped biochar has good specific surface area and pore size structure.It is shown by experimental results that the nitrogen-manganese co-doped biochar together with persulfate can significantly enhance the degradation rate of acesulfame-K in water.The removal rate of acesulfame-K reaches as high as 94.17% in 120 min under the conditions that the dosage of catalyst is 2.5 g·L^-1,the concentration of persulfate is 8 mmol·L^-1 and the pH of the initial solution remains unchanged.The degradation reaction is characterized by taking sulfate radicals as the dominant radicals.Nitrogen-manganese co-doped biochar has good activation performance and recycling rate.