BACKGROUNDThe encapsulation technique was applied to efficiently eliminate the Congo red (CR) from aqueous solutions. During the ionotropic gelation between 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, rpm, etc.ResultsAccording 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 and a pH value of 3, the encapsulation efficiency was calculated to be about 98.9%, with an encapsulation capacity of 2800 mg dye/g AL. The zeta potential values of AL and CR/AL nanocapsules were determined to be +7.05 eV and ‐14.9 eV and the results showed that the particles tended to agglomerate. TEM micrographs also showed that the nanopasscules were nanosized and agglomerated. Soil and UV degradation studies showed that the dye‐entrapped nanocapsules were noted to degrade remarkably. These results seriously highlighted the potential of encapsulation for dye removal in terms of the economical and practical applications.ConclusionEncapsulation was confirmed to be an economical and practical technique for effectively eliminating Congo red from aqueous solutions. Under UV light irradiation, the dye molecules entrapped within alginate nanocapsules displayed photodegradation.This article is protected by copyright. All rights reserved.

中文翻译：

---

快速有效修复阴离子染料的一锅式绿色方法：封装在海藻酸盐纳米胶囊中

背景技术采用包封技术可有效去除水溶液中的刚果红(CR)。在 Ca 离子交变胶凝过程中2+离子和藻酸盐（AL），CR在一步过程中被有效地捕获在AL纳米胶囊内。通过对pH、时间、转速等参数的系统优化，揭示了通过包封有效去除CR的合适条件。结果根据实验观察，搅拌速率和温度对CR分子的包封影响不显着。当培养基的pH值为3时，15分钟内包封率达到最高水平。在CR初步浓度为2000 mg/L、pH值为3时，计算包封率约为98.9%，包封量为2800 mg染料/g AL。 AL和CR/AL纳米胶囊的zeta电位值测定为+7.05 eV和‐14.9 eV，结果表明颗粒倾向于团聚。 TEM 显微照片还显示纳米粒子是纳米尺寸的并且是团聚的。土壤和紫外线降解研究表明，包埋染料的纳米胶囊会显着降解。这些结果严重凸显了胶囊化去除染料在经济和实际应用方面的潜力。结论胶囊化被证实是一种经济实用的技术，可有效去除水溶液中的刚果红。在紫外光照射下，包裹在海藻酸盐纳米胶囊内的染料分子表现出光降解作用。本文受版权保护。版权所有。