Inorganic Chemicals Industry >
Study on adsorption characteristics of multi-pore calcium carbonate made from egg shell powder for Congo red
Received date: 2021-01-26
Online published: 2021-08-11
By using waste egg shell as raw material and sodium dodecyl sulfate as template,porous calcium carbonate particles were prepared by template method,and their apparent morphology was analyzed by scanning electron microscope.Porous cal-cium carbonate particles were used to study the adsorption of Congo red,the optimal adsorption conditions were as follows：at room temperature,porous calcium carbonate content of 0.15 g,25 mL of Congo red solution with mass concentration of 300 mg/L,adsorption time of 7 h,and under this condition the adsorption rate was about 93%.The adsorption isothermal model and kine-tic model showed that the adsorption of porous calcium carbonate to Congo red belonged to monolayer adsorption,and the ad-sorption kinetics was in line with the quasi-second-order kinetics.Infrared spectrum analysis showed that the adsorption of Congo red by porous calcium carbonate was mainly physical adsorption.
Key words： egg shell; porous calcium carbonate; Congo red; adsorption characteristics
Yanmeng Chen , Chunni He , Ting Pan , Yongshi Wang , Moji Meng , Junfeng Lan . Study on adsorption characteristics of multi-pore calcium carbonate made from egg shell powder for Congo red[J]. Inorganic Chemicals Industry, 2021 , 53(8) : 91 -95 . DOI: 10.19964/j.issn.1006-4990.2021-0061
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