Abstract：Microwave-enhanced persulfate (PS) oxidation using activated carbon (AC) as catalyst was originally applied to disposal landfill leachate. The comparison of different process was studied and so as to the effects of pH、dosage of AC、PS dosage、microwave power and radiation time. The obtained results showed that the rates of COD and NH4+-N removal increased with the increase of AC dosage、 PS dosage(S2O82-:12COD0)、 microwave (MW) power and radiation time. The effect of pH value on COD removal was unconspicuous while NH4+-N removal got better efficiency under alkaline condition. The optimal condition was that: AC dosage =10g/L, S2O82-:12COD0 =1.2, pH =9, microwave power =500W and radiation time =10min. Under the optimal condition, the rates of COD and NH4+-N removal were 78.2% and 67.2% respectively, and the biodegradability (BOD5/COD) of the landfill leachate increased to 0.38. The results of comparison experiments showed that the rates of COD and NH4+-N removal in the process of MW-AC-PS were remarkable higher than the other treatments. There might be certain cooperation actions in MW-AC-PS system during the degradation of COD and NH4+-N and thermal effects of MW played a key role. When AC was used for the fourth time, the efficiencies of COD and NH4+-N removal were 61.2% and 46.1% respectively.
李娜, 李小明, 杨麒, 柳娴, 伍秀琼. 微波/活性炭强化过硫酸盐氧化处理垃圾渗滤液研究[J]. 中国环境科学, 2014, 34(1): 91-96.
LI Na, LI Xiao-Ming, YANG Qi, LIU Xian, WU Xiu-Qiong. Landfill leachate treatment by microwave-enhanced persulfate oxidation process using activated carbon as catalyst. . CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(1): 91-96.
