Optimization of Preparation Process Conditions for Sodium Ion Adsorbent Based on Box-Behnken Response Surface Methodology

Abstract

Abstract: Red mud contains a certain amount of sodium ion, which has a great impact on red mud’s application performance. In this study, an adsorbent was prepared to separate sodium ion, and the Box-Behnken program in the response surface methodology of the Design-Expert software was used to optimize the preparation conditions of the adsorbent. The appropriate range of three factors including calcination temperature, calcination time and Al content was determined by single factor experiment with sodium ion removal rate as the evaluation index. On this basis, though the Box-Behnken center combined test, the response surface analysis was carried out with the sodium ion removal rate as the response value, and the preparation process conditions were optimized. The result shows that the optimal preparation conditions are calcination temperature of 400 ℃, calcination time of 5 h, and Al content of 40%. Under these conditions, the sodium ion removal rate is 95.30%, which provides a method for the separation of sodium ions in red mud.

Key words: response surface methodology, red mud, sodium ion, adsorbent, process optimization, separation

CLC Number:

XIONG Mengxue, YANG Min, CHEN Qianlin. Optimization of Preparation Process Conditions for Sodium Ion Adsorbent Based on Box-Behnken Response Surface Methodology[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2360-2367.

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