One-pot green approach for rapid and effective anionic dye remediation: encapsulation within alginate nanocapsules

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-04-10 DOI:10.1002/jctb.7653

Erol Alver, Deniz Doğan, Humeyra Mert, Ayşegül Ülkü Metin

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引用次数: 0

Abstract

BACKGROUND

The encapsulation technique was applied to efficiently eliminate Congo red (CR) from aqueous solutions. During the ionotropic gelation between calcium (Ca²⁺) ions and alginate (AL), CR was effectively entrapped within the AL nanocapsules in a one-step process. Suitable conditions for efficient CR removal via encapsulation were revealed by the systematic optimization of parameters including pH, time and stirring speed, etc.

RESULTS

According to the experimental observations, the stirring rate and temperature were found to have an insignificant effect on the encapsulation of CR molecules. When the pH value of the medium was 3, the highest level of encapsulation efficiency was achieved in a period of 15 min. At a preliminary CR concentration of 2000 mg L⁻¹ and pH 3, the encapsulation efficiency was calculated at ≈98.9%, with an encapsulation capacity of 2800 mg dye g⁻¹ AL. The zeta potential values of AL and CR/AL nanocapsules were determined to be +7.05 eV and −14.9 eV, respectively, and the results showed that the particles tended to agglomerate. TEM micrographs also showed that the nanocapsules were nanosized and agglomerated. Soil and UV degradation studies showed that the dye-entrapped nanocapsules degraded remarkably. These results highlighted the great potential of encapsulation for dye removal in economical and practical applications.

CONCLUSION

Encapsulation was confirmed to be an economical and practical technique for effectively eliminating CR from aqueous solutions. Under UV light irradiation, the dye molecules entrapped within alginate nanocapsules displayed photodegradation. © 2024 Society of Chemical Industry (SCI).

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快速有效地修复阴离子染料的单锅绿色方法：封装在海藻酸盐纳米胶囊中

背景应用封装技术可有效消除水溶液中的刚果红（CR）。在 Ca2+ 离子与海藻酸盐（AL）之间的离子凝胶化过程中，CR 被一步法有效地包裹在 AL 纳米胶囊中。通过对 pH 值、时间、转速等参数进行系统优化，揭示了通过封装有效去除 CR 的合适条件。当培养基的 pH 值为 3 时，15 分钟内的封装效率最高。当 CR 的初步浓度为 2000 mg/L 和 pH 值为 3 时，计算得出的封装效率约为 98.9%，封装容量为 2800 mg 染料/g AL。经测定，AL 和 CR/AL 纳米胶囊的 zeta 电位值分别为 +7.05 eV 和 -14.9 eV。TEM 显微照片也显示，纳米胶囊具有纳米尺寸和团聚的特点。土壤和紫外线降解研究表明，包裹染料的纳米胶囊降解明显。这些结果充分显示了封装技术在经济和实际应用方面去除染料的潜力。在紫外光照射下，海藻酸盐纳米胶囊中包裹的染料分子会发生光降解。本文受版权保护。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.