一种可有效吸附汞离子的新型卟啉多孔有机聚合物

IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Journal of Polymers and the Environment Pub Date : 2024-07-02 DOI:10.1007/s10924-024-03312-7
Azam Helmi Zare, Mostafa Khajeh, Ali Reza Oveisi, Saba Daliran, Mansour Ghaffari-Moghaddam
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摘要

在此,我们合成了一种新型卟啉基多孔有机聚合物(PPOP),它是一种有效的生物吸附剂,能够快速分离和测量水中的汞(II)离子。对合成的生物基吸附剂进行了多种技术分析,包括 PXRD(呈现无定形网络)、FT-IR、SEM(球形 250-1000 纳米颗粒)、EDS、BET 和 TG/DTG(热稳定性高达 500 °C)。研究并优化了吸附过程中的实验参数,包括样品的 pH 值、吸附和解吸的时间、吸附剂的质量以及洗脱液的类型和体积。实验数据由 Freundlich 和 Langmuir 等温线模型方程进行评估,结果表明 Langmuir 模型更适合汞离子的吸附。PPOP 的吸附容量最高,仅在五分钟内就达到了 384.6 毫克/克。吸附效率的提高主要归因于 PPOP 与 Hg(II)离子之间的静电和配位相互作用的综合效应。此外,PPOP 的检出限(LOD)值为 2.1 ng L-1。最后,所制备的吸附剂被用于萃取环境中各种水样中的汞(II)离子,回收率高达 91%。
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A New Porphyrin-Porous Organic Polymer for Effective Adsorption of Mercury Ions

Herein, we synthesized a new type of porphyrin-based porous organic polymer (PPOP) as an effective bio-inspired adsorbent capable of rapidly separating and measuring Hg(II) ions from the water. The synthesized bio-based adsorbent was analyzed by several techniques including PXRD (presented an amorphous network), FT-IR, SEM (spherical 250–1000 nm nanoparticles), EDS, BET, and TG/DTG (high thermal stability up to 500 °C). The experimental parameters in the procedure of adsorption including pH of the samples, times for adsorption and desorption, the sorbent mass, and also, the type and volume of eluent were examined and optimized. The experimental data were evaluated by Freundlich and Langmuir isotherm model equations and the results showed that the Langmuir model exhibited a better fit for mercury ions adsorption. PPOP exhibited the highest capacity for adsorption at 384.6 mg/g within only five minutes. The enhanced efficiency for adsorption can be mainly attributed to the combination effect of the electrostatic and coordination interactions between PPOP and Hg(II) ions. In addition, PPOP showed an excellent limit of detection (LOD) value of 2.1 ng L− 1. Finally, the prepared adsorbent was employed for the extraction of Hg(II) ions in various water samples from the environment, achieving recoveries up to 91%.

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来源期刊
Journal of Polymers and the Environment
Journal of Polymers and the Environment 工程技术-高分子科学
CiteScore
9.50
自引率
7.50%
发文量
297
审稿时长
9 months
期刊介绍: The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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