School of Geosciences and Resources, China University of Geosciences (Beijing), Beijing 100083, People's Republic of China.
Environ Technol. 2013 Sep-Oct;34(17-20):2853-8. doi: 10.1080/09593330.2013.795986.
Landfill leachate is posing an ever-greater environmental hazard. Recently, a process for purification combining activated carbon, microwave (MW) and Fenton oxidation has drawn much attention. In this study, the effectiveness of this process for the pretreatment of an old-age landfill leachate was tested. The effects of various parameters were investigated and the optimal condition included as follows: MW energy density, 6 W/mL; MW power, 300 W; radiation time, 8 min; H2O2 dosage, 0.1 mol/L; Fe(2+)-EDTA dosage, 0.02 mol/L; granular activated carbon (GAC) dosage, 6 g/L. Within the present experimental condition applied, the chemical oxygen demand (COD) removal reached 56.5%, and the ratio of 5-day biochemical oxygen demand to chemical oxygen demand (BOD5/COD) was enhanced from 0.122 to 0.462. Comparing with GAC, MW and Fenton alone or the combinations of any two of them, MW/Fenton/GAC displayed superior treatment efficiency. The MW/Fenton/GAC process is believed to be a promising pretreatment technology for biorefractory old-age landfill leachate.
垃圾渗滤液造成的环境危害日益严重。最近，一种将活性炭、微波（MW）和芬顿氧化相结合的净化工艺引起了广泛关注。本研究测试了该工艺对老龄垃圾渗滤液预处理的效果。考察了各种参数的影响，优化条件为：MW 能密度 6 W/mL；MW 功率 300 W；辐照时间 8 min；H2O2 用量 0.1 mol/L；Fe(2+)-EDTA 用量 0.02 mol/L；颗粒活性炭（GAC）用量 6 g/L。在应用的实验条件下，COD 去除率达到 56.5%，5 日生化需氧量与化学需氧量的比值（BOD5/COD）从 0.122 提高到 0.462。与单独使用 GAC、MW 和芬顿相比，或它们两两组合相比，MW/Fenton/GAC 表现出更高的处理效率。MW/Fenton/GAC 工艺被认为是一种有前途的生物难降解老龄垃圾渗滤液预处理技术。
