Department of Environmental Health Engineering, School of Health, Ardabil University of Medical Sciences, Ardabil, 56189-85991, Iran; Students Research Committee, Faculty of Health, Ardabil University of Medical Sciences, Ardabil, 56189-85991, Iran.
Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, United Kingdom.
Chemosphere. 2022 Jan;287(Pt 1):132114. doi: 10.1016/j.chemosphere.2021.132114. Epub 2021 Aug 31.
The adsorption techniques are extensively used in dyes, metronidazole, aniline, wastewater treatment methods to remove certain pollutants. Furfural is organic in nature, considered a pollutant having a toxic effect on humans and their environment and especially aquatic species. Due to distinct characteristics of the adsorption technique, this technique can be utilized to adsorb furfural efficiently. As an environmentally friendly technique, the pomegranate peel was used to synthesized activated carbon and nanostructure of zerovalent iron impregnated on the synthesized activated carbon. The physicochemical and crystallinity characterization was done using Fourier transmission infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and Field emission scanning electron microscopy (FESEM). The nanoparticles are porous in structure having 821.74 m/g specified surface area. The maximum amount of the adsorbent pores in the range of 3.08 nm shows the microporous structure and enhancement in adsorption capacity. The effects of increment in concentration of adsorbent, pH, reaction contact time and adsorbent dose, isothermal and kinetic behaviour were investigated. At the UV wavelength of 227 nm furfural adsorption was detected. The separation of the furfural from the aqueous solution was calculated at the 1 h reaction time at the composite dosage of 4 g/L, 250 mg/L adsorbent concentration and pH kept at 7. The 81.87% is the maximum removal attained by the nanocomposite in comparison to the activated carbon is 62.06%. Furfural adsorption was also analyzed by using the equations of isothermal and kinetics models. The adsorption process analysis depends on the Freundlich isotherm and Intra-particle diffusion than the other models. The maximum adsorbent of the composite was determined by the Langmuir model which is 222.22 mg/g. The furfural removal enhances as the adsorbent dose enhances. The developed zerovalent iron nanoparticles incorporated on activated carbon (AC/nZVI) from pomegranate peel extract are feasible as an efficient and inexpensive adsorbent to eliminate furfural from a liquid solution.
吸附技术广泛应用于染料、甲硝唑、苯胺、废水处理方法中，以去除某些污染物。糠醛在性质上是有机的，被认为是一种对人类及其环境，特别是水生生物具有毒性的污染物。由于吸附技术的独特特点，该技术可以有效地吸附糠醛。作为一种环保技术，石榴皮被用来合成活性炭，并将零价铁纳米颗粒浸渍在合成的活性炭上。使用傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、BET 和场发射扫描电子显微镜（FESEM）进行了物理化学和结晶度表征。纳米颗粒具有多孔结构，比表面积为 821.74 m/g。吸附剂孔的最大数量在 3.08nm 范围内，显示出微孔结构和吸附能力的增强。研究了吸附剂浓度、pH 值、反应接触时间和吸附剂剂量、等温线和动力学行为的增加的影响。在 227nm 的紫外波长下检测到糠醛的吸附。在复合材料剂量为 4g/L、吸附剂浓度为 250mg/L、pH 值保持在 7 的条件下，在 1h 反应时间内，从水溶液中分离糠醛。纳米复合材料的最大去除率为 81.87%，而活性炭的最大去除率为 62.06%。还通过使用等温线和动力学模型对糠醛的吸附进行了分析。吸附过程分析取决于 Freundlich 等温线和内扩散，而不是其他模型。通过 Langmuir 模型确定了复合材料的最大吸附剂，为 222.22mg/g。随着吸附剂剂量的增加，糠醛的去除率提高。从石榴皮提取物中开发的负载零价铁纳米颗粒的活性炭（AC/nZVI）作为一种从液体溶液中去除糠醛的高效、廉价吸附剂是可行的。
