Eco-Friendly Synthesis of Copper Nanoparticles from Fiber of Trapa natans L. Shells and Their Impregnation Onto Polyamide-12 for Environmental Applications

ABSTRACT

In this study, copper nanoparticles were synthesized from Trapa natans L. shells and loaded within polyamide-12 for use as an adsorbent. The synthesized nanocomposite was used for the first time to remove toxic methyl orange and brilliant green dye molecules from synthetic aqueous solutions. In order to characterize the plant-based nanocomposite, its functional groups, surface texture, elemental composition, structure, surface area, and crystallinity were determined. Adsorption efficiency was found to be affected by factors like pH (2–10), time (5–240 min.), and temperature (288–308 K). It was at pH 6 that the adsorbent reached the point of zero charge. During the adsorption process, electrostatic attraction played an influential role. Adsorption isotherms and kinetics data were well-fitted by Langmuir isotherms and pseudo-second-order models, respectively. A maximum adsorption capacity of 166.60 mg/gm was calculated for 93.90% methyl orange removal and 55.24 mg/gm for 97.30% brilliant green removal. The adsorption process was endothermic, spontaneous, and physical. The rapid desorption of dye molecules confirms the potential, and practicality of the nanocomposite as a promising adsorbent for decolorizing colored wastewater on an industrial scale.

摘要

在本研究中，从Trapa natans L.壳中合成了铜纳米颗粒，并将其负载在聚酰胺-12中用作吸附剂. 合成的纳米复合材料首次用于去除合成水溶液中有毒的甲基橙和亮绿色染料分子. 为了表征植物基纳米复合材料，测定了其官能团、表面结构、元素组成、结构、表面积和结晶度. 发现吸附效率受pH（2-10）、时间（5-240分钟）和温度（288-308K）等因素的影响. 吸附剂在pH值为6时达到零电荷点. 在吸附过程中，静电吸引起了重要作用. 吸附等温线和动力学数据分别用Langmuir等温线和拟二阶模型很好地拟合. 对于93.90%的甲基橙去除率和97.30%的亮绿色去除率，计算出的最大吸附量分别为166.60 mg/gm和55.24 mg/gm. 吸附过程是吸热的、自发的和物理的. 染料分子的快速解吸证实了纳米复合材料作为一种有前途的吸附剂在工业规模上脱色有色废水的潜力和实用性.

KEYWORDS:

• Trapa natans L. fibers
• Copper oxide nanoparticles
• Polyamide-12
• Green synthesis
• Adsorption
• Characterization

关键词:

• 纤维
• 氧化铜纳米粒子
• 聚酰胺-12
• 绿色合成
• 吸附
• 刻画

Highlights

• Copper nanoparticles were synthesized using Trapa natans L. shells.

• In order to impregnate the nanoparticles, PA-12 was used.

• The rapid desorption of dye molecules confirms the adsorptive potential of the synthesized nanocomposite.

• As a result of its excellent adsorption capacity toward MO and BG, the material is both feasible and practical.

• PA-12 can also be used to make nanocomposites that can treat water in houses.

• The synthesized nanocomposite has stability of 52.57 and 48.63% for BG and MO.

Acknowledgment

The authors would like to thank the Deanship of Scientific Research at Majmaah University for supporting this work under Project No. R-2023-474.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/15440478.2023.2224976

Additional information

Funding

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.