壳聚糖及木屑改性壳聚糖对阴离子和阳离子染料的吸附/解吸性能研究

IF 0.8 Q4 MATERIALS SCIENCE, BIOMATERIALS

Progress on Chemistry and Application of Chitin and its Derivatives Pub Date : 2023-09-30 DOI:10.15259/pcacd.28.002

Urszula Filipkowska, Tomasz Jóźwiak

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引用次数: 0

摘要

我们探索了壳聚糖以珠子和山毛榉木屑固定在壳聚糖中的多种用途，以去除阴离子(活性黄85和活性蓝5)和阳离子(碱性紫10和碱性绿4)染料。对于这两种阴离子染料，随着下一个吸附/脱附循环的进行，在吸附剂中积累的染料量增加，导致脱附效率降低。可能的吸附/解吸循环次数受所有活性位点占据的调节。我们观察到阳离子染料的相反趋势:吸附和解吸后在吸附剂中积累的电荷随着后续循环而减少。尽管与总吸附容量相比，吸附剂的累积电荷较低，但不可能进一步吸附和解吸染料。结果表明，两种吸附剂均可进行6 ~ 7次吸附/解吸循环，但解吸效率随循环次数的增加而降低。

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REUSABILITY OF CHITOSAN AND SAWDUST-MODIFIED CHITOSAN FOR ADSORPTION/DESORPTION OF ANIONIC AND CATIONIC DYES

We explored the multiple uses of chitosan in the form of beads and beech sawdust immobilised in chitosan to remove anionic (Reactive Yellow 85 and Reactive Blue 5) and cationic (Basic Violet 10 and Basic Green 4) dyes. For both anionic dyes, with the next adsorption/desorption cycle, the amount of dye accumulated in the adsorbent increased, which resulted in a decrease in the desorption efficiency. The number of possible adsorption/desorption cycles was regulated by the occupation of all active sites. We observed the opposite trend for the cationic dyes: the charge accumulated in the adsorbent after both adsorption and desorption decreased with subsequent cycles. Despite the low accumulated charge compared with the total adsorption capacity of the adsorbents, it was impossible to further adsorb and desorb the dye. The results demonstrated that for both adsorbents tested, it was possible to carry out 6–7 adsorption/desorption cycles, but the desorption efficiency decreased with each cycle.

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来源期刊

Progress on Chemistry and Application of Chitin and its Derivatives MATERIALS SCIENCE, BIOMATERIALS-

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： Progress in the Chemistry and Application of Chitin and its Derivatives is an annual journal focused on all aspects of production, modification, enzymology and application of chitin and its many derivatives, including chitosan. The journal publishes full-length papers as well as invited reviews. To be considered, papers must present original research that has not been published or accepted for publication elsewhere. The language of the journal will be English.