Sui Yixin, Gao Shuaibing, Qi Jiaxiang, Abliz Shawket, Chai Linlin
Key Laboratory of Oil and Gas Fine Chemicals of Ministry of Education, School of Chemical Engineering, Xinjiang University, Urumqi 830017, China.
Polymers (Basel). 2025 Jan 17;17(2):229. doi: 10.3390/polym17020229.
Lead (Pb) is classified as a prevalent metallic pollutant, significantly impacting the ecological environment, especially human health. Consequently, it is crucial to develop adsorbent materials that are environmentally friendly, cost-effective, and which possess high selectivity. This study aims to fabricate a Pb(II)-imprinted acrylonitrile-co-acrylic acid composite material by using modified sand particles as the carrier, and then to investigate its properties. Through pretreatment of sand particles, acrylonitrile and acrylic acid were polymerized on the surface of modified sand particles, and Pb(II) served as a template ion for imprinting. A variety of characterization methods were used to verify the composite material and conduct an analysis of its morphology, chemical composition, and pore characteristics. The adsorption efficiency of this composite material for Pb(II) is comprehensively explored, with the process involving adsorption kinetics, adsorption isotherms, selective adsorption, and reuse experiments. Through static adsorption experiments, multiple elements influencing the adsorption ability of the composite material towards Pb(II) are investigated. It was demonstrated by the results that the composite material prepared possesses a rich pore structure and excellent Pb(II) recognition ability. The investigation on adsorption kinetics is in line with the quasi-first-order and quasi-second-order kinetic models, while the adsorption isotherm, obeys the Langmuir model. The ideal adsorption conditions were pH = 7, with the adsorption reaching equilibrium within 105 min. Even when multiple interfering ions were present, it still had high selectivity for Pb(II). The composite material showed an adsorption saturation capability reaching 41.83 mg·g, considerably surpassing the non-imprinted counterpart. After being reused eight times, the composite material can still maintain an adsorption efficiency for Pb(II) that is above 79% and demonstrates high potential in the practical application environment.
铅（Pb）被归类为一种普遍存在的金属污染物，对生态环境尤其是人类健康产生重大影响。因此，开发环境友好、成本效益高且具有高选择性的吸附材料至关重要。本研究旨在以改性砂粒为载体，制备一种铅（II）印迹丙烯腈 - 丙烯酸复合材料，然后研究其性能。通过对砂粒进行预处理，使丙烯腈和丙烯酸在改性砂粒表面聚合，铅（II）作为模板离子进行印迹。采用多种表征方法对复合材料进行验证，并对其形态、化学成分和孔隙特性进行分析。全面探究了该复合材料对铅（II）的吸附效率，包括吸附动力学、吸附等温线、选择性吸附和重复使用实验。通过静态吸附实验，研究了影响复合材料对铅（II）吸附能力的多种因素。结果表明，所制备的复合材料具有丰富的孔隙结构和优异的铅（II）识别能力。吸附动力学研究符合准一级和准二级动力学模型，吸附等温线符合朗缪尔模型。理想的吸附条件为pH = 7，吸附在105分钟内达到平衡。即使存在多种干扰离子，它对铅（II）仍具有高选择性。该复合材料的吸附饱和容量达到41.83 mg·g，大大超过非印迹材料。重复使用八次后，该复合材料对铅（II）的吸附效率仍能保持在79%以上，在实际应用环境中显示出巨大潜力。
