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Ammoniation Modification of Lignin and Its Adsorption Properties for Malachite Green
Received:May 29, 2023  
DOI：10.11980/j.issn.0254-508X.2023.12.009
Key Words:lignin  ammonization modification  mannich reaction  adsorption
Fund Project:济南市高校“20条”自主培养创新团队项目（202228073）；齐鲁工业大学科教产项目（2022JBZ01-05）；德州中试基地项目（2022DZZS003）。
Author NameAffiliationPostcode
SONG Changyong State Key Lab of Biobased Material and Green Papermaking， Faculty of Light Industry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nanShandong Province， 250353 250353
GAO Chao State Key Lab of Biobased Material and Green Papermaking， Faculty of Light Industry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nanShandong Province， 250353 250353
LIU Zhongming State Key Lab of Biobased Material and Green Papermaking， Faculty of Light Industry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nanShandong Province， 250353 250353
WANG Shoujuan State Key Lab of Biobased Material and Green Papermaking， Faculty of Light Industry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nanShandong Province， 250353 250353
KONG Fangong* State Key Lab of Biobased Material and Green Papermaking， Faculty of Light Industry， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nanShandong Province， 250353 250353
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Abstract:The ammoniated lignin adsorbent was prepared by direct and indirect methods， respectively， with lignin and polyvinylamine as raw materials to effectively remove malachite green dye from wastewater. Mutiple analytical technigues were used to analyze and detect the adsorbent. The adsorption effect and mechanism in the malachite green solution were analized. The results showed that ammoniated oxidized lignin prepared by indirect method had good adsorption performance for malachite green compared with direct ammoniated lignin due to its more functional groups. When pH value was 5， the temperature was 55 ℃， the adsorption time was 100 min， and the adsorption amount was 1 g/L， the optimal removal rate of dye achieved 96.5%. The adsorption process of malachite green was in accordance with the pseudo-second-order kinetics， and the adsorption behavior was consistent with the Langmuir adsorption isotherms.
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