Research Laboratory of Environmental Remediation, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran.
Research Laboratory of Environmental Remediation, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran.
J Environ Manage. 2020 Jan 15;254:109802. doi: 10.1016/j.jenvman.2019.109802. Epub 2019 Nov 12.
In the present study, the potential of Azolla filiculoides (A. filiculoides) was first investigated for degradation of Phenazopyridine (PhP), an analgesic drug. The effects of main variables such as initial pharmaceutical concentration, amount of plant, and pH were studied on the efficiency of the biological process. It was observed that A. filiculoides was able to remove pharmaceuticals from contaminated water up to 85.90% during 48 h. Then, the electro-Fenton (EF) method was applied for further removal of PhP yielding a removal rate of about 98.72% under optimum conditions during 2 h. The effects of variables including the current, amount of catalyst, and pH were also studied in this phase. Also, the probability of adsorption was investigated during this step. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis were performed for the used magnetite nanoparticles, total organic carbon (TOC) were performed to investigate PhP removal efficiency during the reaction time and Gas chromatography-mass spectrometry (GC-MS) were performed to analyze degradation byproducts of PhP. Based on the results, it was found that a combination of these bioremediation and electrochemical removal steps were capable of PhP removal from contaminated water. Therefore, this approach may be effective for phytoremediation of pharmaceutical-contaminated aquatic ecosystems.
在本研究中，首次研究了满江红（A. filiculoides）对匹那吡啶（PhP）的潜在降解能力，匹那吡啶是一种止痛药物。研究了初始药物浓度、植物用量和 pH 等主要变量对生物过程效率的影响。结果表明，满江红在 48 小时内能够将受污染水中的药物去除高达 85.90%。然后，应用电芬顿（EF）法进一步去除 PhP，在 2 小时内的最佳条件下，去除率约为 98.72%。在此阶段还研究了变量，包括电流、催化剂用量和 pH 的影响。还研究了在此步骤中吸附的可能性。进行了扫描电子显微镜（SEM）和 X 射线衍射（XRD）分析，用于使用的磁铁矿纳米粒子，进行总有机碳（TOC）分析以研究反应时间内 PhP 的去除效率，进行气相色谱-质谱（GC-MS）分析以分析 PhP 的降解产物。根据结果发现，这些生物修复和电化学去除步骤的结合能够从受污染的水中去除 PhP。因此，这种方法可能对受药物污染的水生生态系统的植物修复有效。
