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| Characteristics of Cu(Ⅱ) removal in wastewater by new fly ash ceramisite and its adsorption isotherm simulation |
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| Abstract: |
| A new kind of fly ash ceramsite was made with fly ash and bentonite. This paper studied the characteristics
of the new fly ash ceramsite on the removal of Cu (Ⅱ) in wastewater and its adsorption isotherm simulation. The results
showed that adsorption was the main process of Cu(Ⅱ) removal. The adsorption effect of Cu (Ⅱ) was related to the amount
of ceramic, temperature and oscillation. Better removal of Cu (Ⅱ) could be attained with the larger amount of fly ash
ceremsite, appropriate temperature and oscillation. The Cu (Ⅱ) removal rate could reach 100% with the pH4.5, 25℃, 150
r/min and 2.00 g ceramsite, when the wastewater was 50 mL and the concentration was 100 mg/L, while the removal rate of
two kinds of ordinary ceramsites was only 14.6% and 6.3% under the same conditions. The Cu (Ⅱ) removal rate of the
ceramsite adsorption column could reach 90% above for 4 times continuously. The maximum adsorption capacity of Cu (Ⅱ)
was 2.78 mg/g. The adsorption process accorded with Langmuir adsorption isotherm, rather than Freundlich adsorption
isotherm. |
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