A NATURAL ZEOLITE PERMEABLE REACTIVE BARRIER TO TREAT HEAVY-METAL CONTAMINATED WATERS IN ANTARCTICA Kinetic and Fixed-bed Studies
on exchange characteristics of Cu2þ on the natural zeolite clinoptilolite at 2 and 228C are presented to facilitate the development of a permeable reactive barrier (PRB) to treat heavy-metal contaminated waters in Antarctica. A one-dimensional mass transfer trans-port model describing non-equilibriu...
| Main Authors: | , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.600.637 http://www.pfpc.unimelb.edu.au/people/cvs/gws_publications/110.pdf |
| Summary: | on exchange characteristics of Cu2þ on the natural zeolite clinoptilolite at 2 and 228C are presented to facilitate the development of a permeable reactive barrier (PRB) to treat heavy-metal contaminated waters in Antarctica. A one-dimensional mass transfer trans-port model describing non-equilibrium sorption of Cu2þ in fixed-bed flow reveals that satur-ation capacities are independent of flow rate, but mass transfer coefficients increase with water velocity. Clinoptilolite capacity in fixed-beds is approximately 50 % the capacity in equivalent batch systems, and mass transfer coefficients are between two and eight times batch-estimated values. Fixed-bed performance is significantly reduced at cold temperature, with breakthrough points and saturation capacities at 28C between 60 and 65 % less than oper-ation at 228C. The detrimental effects of cold temperature on fixed-bed performance will have significant implications for the design of a natural zeolite PRB to treat heavy-metal contami-nated waters in Antarctica or other cold regions. |
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