Can we use constructed wetland for treating leachate of landfill?

Hello everyone we are facing problem of Landfill leachates since rainy season. Ground water may get contaminated as a result of this. We need to fix the problem before the severity increases. What can be done to stop the problem? Can we use constructed wetland for treating leachate of landfill? what are design specifications and general consideration? Does any one has worked in this area? I have asked many doubts in one question but your inputs are really important to me. Cheers Jose.