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KMID : 1024519980070040559
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Journal of the Environmental Sciences
1998 Volume.7 No. 4 p.559 ~ p.564
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A Study on the Factors Affecting Pb[2+] Removal by Activated Sludge
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Kim Dong-Seog
Kim Mi-Kyung
Suh Jung-Ho
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Abstract
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The effects of temperature, initial concentration and initial sludge concentration on the initial removal rate and maximal removal amounts in activated sludge, respectively, were investigated. The removal of in activated sludge was proved to be temperature-dependent process. The initial removal rate increased from 187.5 to 261.4 mg /g sludge dry weight min, in response to the promoted temperature from 1 to 6, while the maximal removal amount (78.5 mg /g sludge dry weight) occurred at 30t . As the initial concentration increased from 36 to 228 mg /L at the constant temperature of 30C and initial sludge concentration of 1.5 g sludge dry weight/L, the time to reach an equilibrium state was almost independent of the initial concentration and the equilibrium /removal amount was increased Irom 41.9 to 73.6 mg /g sludge dry weight. On the contrary, the equilbrium emoval amount was decreased from 87.7 to 65.3 mg /g sludge dry weight as the in- crease of initial sludge concentration from 0.22 to 1.76 g sludge dry weight/L.
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KEYWORD
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activated sludge, temperature, biosorption, bioaccumulation, Langmuir isotherm, Freundlich isotherm
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