Optimization of Research on the Extraction of Humic Acid from Lignite Using Response Surface Methodology

Pu Rong Wang; Hui Xin Dai; Guo Yin Xu; Bing Liang Xu

doi:10.4028/www.scientific.net/AMR.588-589.75

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 588-589Optimization of Research on the Extraction of...

Optimization of Research on the Extraction of Humic Acid from Lignite Using Response Surface Methodology

Abstract:

Extraction of humic acid from lignite is an efficient method of comprehensive utilization of resource. Based on the trial test, the main factors such as extracting time, concentration of alkaline solution and extracting temperature, which were chosen as parameters to access their effects on extracting rate and identify the optimal conditions by using RSM. Box-behnken central composite design and advanced mathematics were applied to achieve the mathematical model that could predict the response (extraction rate). The results showed that the best technological conditions could be obtained， when extracting time was 82.32min, temperature was 65.83°C and the concentration of sodium hydroxide was 0.94mol/L. Prediction model showed that the maximum extracting rate was 89.19% and the actual experiment obtained a similar result.

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Periodical:

Advanced Materials Research (Volumes 588-589)

Pages:

75-79

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.588-589.75

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Online since:

November 2012

Authors:

Pu Rong Wang, Hui Xin Dai, Guo Yin Xu, Bing Liang Xu

Keywords:

Extraction, Humic Acid (HA), Lignite, Response Surface Methodology (RSM)

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