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Silica analysis in bamboo black liquor by ICP-AES with the assistance of microwave digestion

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Abstract

Herein, a facile and reliable approach for the determination of silica content in bamboo lignocellulosic waste liquid (black liquor) by inductively coupled plasma atomic emission spectrometry (ICP-AES) in combination with microwave digestion was demonstrated. The results showed that black liquor samples pretreated in a microwave-assisted digestion system with the digestion solution contaning HNO3, H2O2, and HF (volume ratio 10 : 4 : 1) resulted in the conversion of silicides into reactive silica. The resulant samples after the digestion were suitable for the silica analysis by ICP-AES. The ICP-AES results showed that the silica element could be readily determined with high accuracy (recovery was as high as 94.7–102.4%). This approach would enable a rapid analysis of the silica content in a non-wood lignocellulosic waste liquid, thus providing an approach for the comprehensive utilization of the spent liquid resource in a more efficient way.

Graphical abstract: Silica analysis in bamboo black liquor by ICP-AES with the assistance of microwave digestion

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Publication details

The article was received on 14 Feb 2017, accepted on 26 Jun 2017 and first published on 25 Jul 2017


Article type: Paper
DOI: 10.1039/C7NJ00545H
Citation: New J. Chem., 2017, Advance Article
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    Silica analysis in bamboo black liquor by ICP-AES with the assistance of microwave digestion

    W. Zhang, Y. Xu, C. Duan and D. Zhang, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ00545H

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