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Chemcial Industry and Engineering 2023, Vol. 40 Issue (5) :117-122    DOI: 10.13353/j.issn.1004.9533.20210803
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Dynamic adsorption of N-methyl-D-glucosamine-cross-linked chitosan boron chelating resin particles in the fixed bed
WU Jichen1, MA Yongli1, WU Qiang1, LIU Mingyan1,2
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
2. State Key Laboratory of Chemical Engineering (Tianjin University), Tianjin 300350, China

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Abstract Boron extraction from salt lake brine, seawater, geothermal water and other solutions has important resource value. Adsorption method is one of the main methods for extracting boron from low concentration solution, and its key step is to develop boron adsorbents with excellent performance. At present, there are many studies on new boron adsorbents, but there are few studies on industrial applications. In order to overcome the bottleneck problems of particle powder, small size, difficult recovery, circulating utilization and industrial application of adsorbents, a new adsorbent with large particle size was prepared by grafting N-methyl-D-glucosamine with more o-hydroxy functional groups onto the surface of cross-linked chitosan. The effects of initial concentration and flow rate of boric acid solution, packing height of adsorbent and diameter ratio of fixed bed on the performance of adsorbent were studied by dynamic adsorption experiments. The results show that under certain experimental conditions, the dynamic adsorption separation effect of boron increases with the increase of initial concentration, height diameter ratio and the decrease of solution flow rate. Compared with the influence of bed height diameter ratio, the changes of initial concentration and solution flow rate have greater influence on the removal rate of boron; The dynamic adsorption performance was better when the height diameter ratio was 4, the initial concentration was 100 mL·min-1 and the solution flow rate was 5 mL·min-1.
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Articles by authors
WU Jichen
MA Yongli
WU Qiang
LIU Mingyan
Keywordsdynamic adsorption   adsorbent   fixed bed   boron     
Received 2021-08-16;
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WU Jichen, MA Yongli, WU Qiang, LIU Mingyan.Dynamic adsorption of N-methyl-D-glucosamine-cross-linked chitosan boron chelating resin particles in the fixed bed[J]  Chemcial Industry and Engineering, 2023,V40(5): 117-122
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