Adel Marzouk, El Naggar Ahmed M A, Bakry Ahmed, Hilal Maher H, El-Zahhar Adel A, Taha Mohamed H, Marey A
Aluminum Sulphate Company of Egypt Egypt.
Egyptian Petroleum Research Institute (EPRI) Nasr City Cairo Egypt
RSC Adv. 2023 Aug 23;13(36):25334-25349. doi: 10.1039/d3ra03794k. eCollection 2023 Aug 21.
Effluent water from different industries is considered one of the most serious environmental pollutants due to its non-safe disposal. Therefore, proper treatment methods for such wastewater are strongly stimulated for its potential reuse in industries or agriculture. This study introduces a composite fabricated doping of polystyrene with nanoparticles of cobalt hydroxide as a novel adsorbent for dye and heavy metal decontamination from wastewater. The adsorbent fabrication involves the preparation of polystyrene high-internal phase emulation (HIPE) polymerization followed by its intercalation with particles of alkali cobalt. The chemical composition and structural properties of the synthesized composite were confirmed by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and energy-dispersive X-ray spectroscopy (EDX). Moreover, scanning electron microscopy (SEM) and N adsorption-desorption surface area analysis were performed to identify the surface and morphological characteristics of the composite. Then, the ability of this structure toward the removal of methylene blue dye (MB) and heavy metal (iron iii) species from waste aqueous solutions was investigated. Successful elimination for both MB and Fe(iii) was achieved by the presented composite. Elevated adsorption capacities of 75.2 and 112.3 mg g, toward MB and Fe(iii) respectively, were detected for the presented polymer-metal hydroxide composite. The increased values of the composite are attributed to the presence of both organic and inorganic functional groups within its structure. Kinetic and isotherm studies for the removal of both cationic species revealed that adsorption processes fit the pseudo-second-order kinetic model and Langmuir isotherm model. Additionally, thermodynamics measurements indicated that the adsorption process of methylene blue and Fe ions is feasible, spontaneous, physisorption, and endothermic.
由于不同行业的废水处置不安全，其被视为最严重的环境污染物之一。因此，强烈鼓励采用适当的处理方法来处理此类废水，以便其在工业或农业中实现潜在的再利用。本研究介绍了一种由聚苯乙烯与氢氧化钴纳米颗粒复合制成的新型吸附剂，用于去除废水中的染料和重金属。吸附剂的制备包括聚苯乙烯高内相乳液（HIPE）聚合的制备，随后将其与碱式钴颗粒进行插层。通过X射线衍射（XRD）、傅里叶变换红外（FTIR）光谱和能量色散X射线光谱（EDX）对合成复合材料的化学成分和结构性质进行了确认。此外，还进行了扫描电子显微镜（SEM）和N吸附-脱附表面积分析，以确定复合材料的表面和形态特征。然后，研究了该结构从废水溶液中去除亚甲基蓝染料（MB）和重金属（铁离子）的能力。所提出的复合材料成功地实现了对MB和Fe（iii）的去除。对于所提出的聚合物-金属氢氧化物复合材料，检测到对MB和Fe（iii）的吸附容量分别提高到75.2和112.3 mg/g。复合材料吸附容量增加的值归因于其结构中有机和无机官能团的存在。对两种阳离子物种去除的动力学和等温线研究表明，吸附过程符合准二级动力学模型和朗缪尔等温线模型。此外，热力学测量表明，亚甲基蓝和铁离子的吸附过程是可行的、自发的、物理吸附的且是吸热的。
