甲基葡糖胺-壳聚糖硼螯合树脂吸附剂的动态吸附

摘要从盐湖卤水、海水、地热水等溶液提硼具有重要价值。吸附法是低浓度溶液提硼除杂的主要方法之一,其关键是吸附剂的研发。目前新型硼吸附剂的研究较多。但是,由于合成的吸附剂多呈粉体,粒径小,回收和循环使用困难,成功应用者很少。为此,对合成的较大粒径的新型甲基葡糖胺-壳聚糖硼螯合树脂吸附剂进行了固定床动态吸附脱硼工程应用问题研究,考察了含硼溶液的初始浓度、流速、吸附剂填充高度和固定床直径比等参数对动态吸附剂特性的影响。结果表明,硼的动态吸附效果随初始浓度和吸附柱填充高径比的增大、溶液流速的减小而增大;相比于高径比的影响,初始浓度和溶液流速的变化对硼吸附率影响较大;在高径比为4、初始浓度100 mg·L^-1、溶液流速5 mL·min^-1时,硼的动态吸附性能较优。

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	吴纪辰
	马永丽
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	刘明言

关键词：动态吸附吸附剂固定床硼

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.

Keywords： dynamic adsorption adsorbent fixed bed boron

Received 2021-08-16;

Fund:天津大学-海南大学自主创新基金(2021XZC-0079)。

Corresponding Authors: 马永丽,讲师,E-mail:mayl@tju.edu.cn。 Email: mayl@tju.edu.cn

About author: 吴纪辰(1997-),男,硕士研究生,研究方向为化学工艺。

引用本文:

吴纪辰, 马永丽, 吴强, 刘明言.甲基葡糖胺-壳聚糖硼螯合树脂吸附剂的动态吸附[J]. 化学工业与工程, 2023,40(5): 117-122

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, 2023,40(5): 117-122

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