Response surface method for the optimization of the adsorption F- conditions by hydrotalcite-like compounds

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China Rural Water and Hydropower ›› 2018 ›› (12) : 82-86.

Response surface method for the optimization of the adsorption F- conditions by hydrotalcite-like compounds

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Abstract

The optimum adsorption conditions of F-removal by Mg/Al/Fe hydrotalcite (MLT) were studied. The Plackett-Burman experiment was used to select the main affecting factors of the F-removal rate. The Box-Behnken experiment in response surface method was used to optimize the design and get a regression model. The optimum adsorption conditions obtained from the model are as follows: calcination temperature 542.22°C, MLT dosage 17.11g/L, reaction time 235.11min. Under the conditions, F-removal rate is 99.39%, which was only 0.14% different from the predicted value, indicating the practicality of the model. Using MLT to treat actual groundwater, the treated F-concentration can meet Class III requirements of the groundwater quality standard, indicating that the hydrotalcite-like compound has good application value, and the MLT adsorption process conforms to the pseudo-second-order kinetics.

Key words

MgAl/Fe hydrotalcite-like compounds / adsorption of fluoride ion / response surface method / kinetic

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. Response surface method for the optimization of the adsorption F- conditions by hydrotalcite-like compounds. China Rural Water and Hydropower. 2018, 0(12): 82-86

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Funding

Project funded by Shanxi Applied Basic Research Program
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