Study on Adsorption of Formaldehyde in Water by Modified Activated Carbon from Shell of Camellia oleifera

doi:10.14088/j.cnki.issn0439-8114.2018.01.012

Abstract

Abstract: Using potassium carbonate as activating agent, activated carbon from shell of Camellia oleifera were prepared according to the different experimental conditions,which were used to adsorb formaldehyde in water to explore the activation temperature,reagent concentration,adsorption time,initial concentration of formaldehyde on adsorption effect. And the adsorption thermodynamics and kinetics were analyzed. The results showed that the adsorption effect of activated carbon from shell of Camellia oleifera on formaldehyde was the best when activating the temperature of 750 ℃ and potassium carbonate concentration of 250 g/L. The adsorption process reached equilibrium in 210 min,which was in accordance with the quasi two stage kinetic model. Adsorption process was in line with the Langmuir isotherm model,the actual maximum adsorption amount of formaldehyde could reach 3.79 mg/g. Under the optimum experimental conditions,the removal rate of 0.1 g of the activated carbon modified on 4 mg/L of formaldehyde was 90.5%,and the adsorption efficiency was good.

Key words: shell of Camellia oleifera Abel, potassium carbonate, formaldehyde, adsorption isotherm, adsorption kinetics

CLC Number:

LIU Xue-mei, CHEN Jia-wei, MA Chuang. Study on Adsorption of Formaldehyde in Water by Modified Activated Carbon from Shell of Camellia oleifera[J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(1): 47-50.

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