用淀粉丙烯酸酯和八臂（3-硫丙基）立方硅氧烷水凝胶去除水中Cd2+和Pb2+重金属离子

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-09-29 DOI:10.1016/j.psep.2025.107954

Ahmed Makki Sadaa Almohammed, Negar Etminani-Esfahani, Abbas Rahmati

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引用次数: 0

摘要

关于地球环境最严重的问题之一是由有毒金属离子引起的水污染。吸附法是主要的处理方法。以淀粉丙烯酸酯为交联剂，以八臂（3-硫丙基）立方硅氧烷为交联剂，制备了含巯基官能团的环保型水凝胶。采用FTIR、FESEM、EDX和TGA技术对淀粉丙烯酸酯和八臂（3-硫丙基）立方硅氧烷（(StA)x-OTCSS）水凝胶的性质进行了表征。考虑了影响StA-OTCSS水凝胶对Pb2+和Cd2+吸附能力的各种因素。在初始浓度为200 ppm时，对这两种离子的最大吸附量分别为381.30和366.80 mg/g。此外，实验表明，在最佳条件下，StA-OTCSS水凝胶在60 min内吸附铅和镉。观察了水凝胶吸附各金属的Langmuir等温线，动力学模型的拟一阶（PFO）最符合实验数据。热力学研究表明，金属吸附处于吸热自发模式。此外，制备的水凝胶的性能不受其他离子存在的影响。因此，所制备的水凝胶可以从水介质中提取有毒金属。

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Removal of Cd2+ and Pb2+ heavy metal ions from aqueous water using starch acrylate and octa-armed (3-thiolpropyl) cubic silsesquioxane hydrogel

One of the most serious problems concerning the environment of our planet is water pollution caused by toxic metal ions. Adsorption is the leading method of treatment. Environmentally friendly hydrogels were formed from starch acrylate and octa-armed (3-thiolpropyl) cubic silsesquioxane as a cross-linker, containing a thiol functional group. The properties of starch acrylate and octa-armed (3-thiolpropyl) cubic silsesquioxane ((StA)_x-OTCSS) hydrogel were characterized by FTIR, FESEM, EDX, and TGA techniques. All effective factors on the adsorption capacity of StA-OTCSS hydrogel at Pb²⁺ and Cd²⁺ absorption were considered. The maximum adsorption capacities for these ions were 381.30 and 366.80 mg/g, respectively, at an initial concentration of 200 ppm. Moreover, experiments showed that under optimal conditions, StA-OTCSS hydrogel absorbed lead and cadmium within 60 min. The Langmuir isotherm for the adsorption of each metal by hydrogel was observed, and the pseudo-first-order (PFO) of the kinetic model best fitted the experimental data. Thermodynamic studies indicate that metal adsorptions are in an endothermic and spontaneous mode. Further, the performance of the prepared hydrogel was unaltered by the presence of other ions. Therefore, the prepared hydrogel can extract toxic metals from the aqueous media.

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.