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Influence of the Starting Materials and Sintering Conditions on Composition of a Macroporous Adsorbent as Permeable Reactive Barrier  

Chung, Doug-Young (Dept. of Agricultural Chemistry Chungnam National University)
Lee, Bong-Han (SEWA ViSION Co. Ltd.)
Jung, Jae-H. (SEWA ViSION Co. Ltd.)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.42, no.4, 2009 , pp. 239-248 More about this Journal
Abstract
In this investigation, we observed surface morphology and porosity of a macroporous adsorbent made of Na-bentonite and Ca-bentonite as structure formation materials and grounded waste paper as macropore forming material for the development of a permeable reactive barrier to remove heavy metals in groundwater. Therefore, we selected minerals having higher cation exchange capacity among 2:1 clay minerals and other industrial minerals because sintering can significantly influence cation exchange capacity, resulting in drastic decrease in removal of heavy metals. The results showed that the increasing sintering temperature drastically decreased CEC by less than 10 % of the indigenous CEC carried by the selected minerals. One axial compressibility test results showed that the highest value was obtained from 5% newspaper waste pulp for both structure formation materials of Na-bentonite and Ca-bentonite although there were not much difference in bulk density among treatments. The pore formation influenced by sintering temperature and period contributes removal of heavy metals passing through the sintered macroporous media having different water retention capacity.
Keywords
Sintering; Macroporous; Adsorbent; Permeable; Reactive barrier;
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