Studies on surface complexation modeling of Zn on soil and soil mixtures as a proposed liner material for waste containment facilities

The main aim of this paper is to model the behavior of red soil and black cotton soil along with lime mixture to sorption of zinc at different range of pH. Visual minteq version 3.0 was used, it was found that the model predicted the behavior accurately and this was compared with an experimental work done earlier. Surface complexation played an important role in the sorption process which gave a new impetus on the reactions taking place at various pH ranges. As most of the landfill leachates have a pH range of 3 to 8. It was concluded that this model generated data will help the landfill designers to take informed decision in dealing with hazardous waste.