Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Vanak Square, Mollasadra Ave, P.O. Box 19945-546, Tehran, Iran.
Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, 16846-13114 Tehran, Iran.
J Contam Hydrol. 2023 May;256:104193. doi: 10.1016/j.jconhyd.2023.104193. Epub 2023 Apr 28.
Increasing population growth and rapid expansion of the industrialization of the world society have caused severe environmental pollution to the planet. This study was carried out in order to investigate the synthesis of biopolymeric texture nano adsorbent based on the Lentinan (LENT), Poly Vinyl Alcohol (PVA) and Iron Oxide nanoparticles for the removal of environmental pollutants. The spherical structural morphology of FeO@LENT/PVA nanocomposite has been determined by FE-SEM analyses. According to the obtained results from FTIR analyses, all absorption bands of the FeO, LENT, and PVA, had been existed in nanocomposite and approved the successful formation of it. From EDS analysis, it has been revealed that 57.21 wt% Fe, 17.56 wt% C and 25.23 wt% O. Also, the XRD pattern of the nanocomposite, approved the presence of polymeric and magnetic parts with card no. JCPDS, 01-075-0033. The BET analysis has defined specific surface area (47 m/g) and total pore volume (0.15 cm/g). Moreover, high heterogeneity and structural stability of the fabricated FeO@LENT/PVA nanocomposite have been proven by TGA. Besides, VSM analysis measured great magnetic property of the nanocomposite (48 emu/g). Also, the FeO@LENT/PVA nanocomposite potential for effective removal of malathion (MA), Diazinon (DA), and Diclofenac (DF) from watery solution has studied by an experiment based on the efficacy of adsorbent dosage, pH, and temperature. The adsorption kinetics of three pollutants had investigated using pseudo-first-order (PFO), pseudo-second-order (PSO) and intra-particle diffusion (IPD) velocity equations, the results showed that the kinetics followed PSO velocity equations. Also, the Langmuir, Freundlich, Dubbin-Radushkevich (D-R) and Temkin isotherm models had investigated, and the adsorption isotherm was adopted from the Langmuir model. The results demonstrated that in the presence of FeO@LENT/PVA nanocomposite, at the optimal conditions (contact time = 180 min, pH = 5, nanocomposite dosage = 0.20 g/L and temperature of 298 K) the maximum adsorption capacity of MA, DF, and DA were 101.57, 153.28, and 102.75 mg/g, respectively. The antibacterial features of the FeO@LENT/PVA nanocomposite, had evaluated by Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria, but the result did not show any antibacterial activity.
人口增长的增加和世界社会工业化的快速扩张，给地球造成了严重的环境污染。本研究旨在制备基于香菇多糖（LENT）、聚乙烯醇（PVA）和氧化铁纳米粒子的生物聚合纹理纳米吸附剂，用于去除环境污染物。FE-SEM 分析确定了 FeO@LENT/PVA 纳米复合材料的球形结构形态。根据 FTIR 分析的结果，FeO、LENT 和 PVA 的所有吸收带均存在于纳米复合材料中，并证实了其成功形成。从 EDS 分析中可以看出，FeO@LENT/PVA 纳米复合材料中存在 57.21wt%Fe、17.56wt%C 和 25.23wt%O。此外，XRD 图谱证实了该纳米复合材料中聚合物和磁性部分的存在，卡片号为 JCPDS 01-075-0033。BET 分析定义了比表面积（47m/g）和总孔体积（0.15cm/g）。此外，TGA 证明了制备的 FeO@LENT/PVA 纳米复合材料具有高的异质性和结构稳定性。此外，通过 VSM 分析测量了纳米复合材料的优异磁性（48emu/g）。此外，研究了 FeO@LENT/PVA 纳米复合材料从水溶液中有效去除马拉硫磷（MA）、二嗪农（DA）和双氯芬酸（DF）的潜力，通过吸附剂用量、pH 值和温度的有效性实验进行研究。通过准一级（PFO）、准二级（PSO）和内扩散（IPD）速率方程研究了三种污染物的吸附动力学，结果表明动力学遵循 PSO 速率方程。此外，还研究了 Langmuir、Freundlich、Dubbin-Radushkevich（D-R）和 Temkin 等温模型，吸附等温线采用 Langmuir 模型。结果表明，在 FeO@LENT/PVA 纳米复合材料的存在下，在最佳条件下（接触时间=180min、pH=5、纳米复合材料用量=0.20g/L 和 298K 温度），MA、DF 和 DA 的最大吸附容量分别为 101.57、153.28 和 102.75mg/g。通过大肠杆菌（E. coli）和金黄色葡萄球菌（S. aureus）细菌评估了 FeO@LENT/PVA 纳米复合材料的抗菌特性，但结果未显示任何抗菌活性。
