Purpose

Pharmaceutical contaminants, including antibiotics, present in the environment, especially water resources, are a main concern for human and environmental health due to their stability and non-degradability. Accordingly, the purpose of this study was to investigate the photocatalytic removal of penicillin G antibiotic from simulated wastewater using a photocatalytic process [UV/ZnO] in an isotherm and kinetic study.

Methods

In the current research, the ZnO nanoparticles [ZnO NPs] were initially characterized by scanning electron microscope [SEM] and X-ray diffraction [XRD]. Then, its efficiency was investigated in the photocatalytic degradation process of penicillin G. The evaluated parameters in the adsorption process penicillin G antibiotic were pH [1,2,3,4,5], penicillin G concentration [10–30 mgL⁻¹], NP dosage [0.5–4.5 gL⁻¹] and contact time [5 to 200 min]. Then, the effect of pH [3, 5, 7, 9, 11, and], penicillin G concentration [10–30 mgL⁻¹], NP dosage [0.01–1.5 gL⁻¹] and contact time [5 to 200 min] in the photocatalytic degradation (UV/ZnO) was studied. The residual penicillin G concentration was measured using a spectrophotometery at a wavelength of 283 nm.

Results

The results indicated that the penicillin G removal efficiency of photocatalytic process [UV/ZnO] using ZnO was 74.65% at the concentration of 10 mgL⁻¹, the pH value of 5, the ZnO NP dosage of 0.1 gL⁻¹ and the contact time of 180 min, as well as the kinetics of degradation followed the pseudo-first-order kinetic model.

Conclusion

It can be concluded that the use of this process is appropriate an effective for the removal of the antibiotic pollutants.

中文翻译：

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UV/ZnO 工艺光催化降解模拟废水中的青霉素 G：等温线和动力学研究。

目的

药物污染物，包括抗生素，存在于环境中，尤其是水资源中，由于其稳定性和不可降解性，是人类和环境健康的主要问题。因此，本研究的目的是在等温线和动力学研究中使用光催化过程 [UV/ZnO] 从模拟废水中光催化去除青霉素 G 抗生素。

方法

在目前的研究中，ZnO 纳米颗粒 [ZnO NPs] 最初是通过扫描电子显微镜 [SEM] 和 X 射线衍射 [XRD] 表征的。然后，对其在青霉素 G 光催化降解过程中的效率进行了研究。青霉素 G 抗生素吸附过程中的评价参数为 pH [1,2,3,4,5]，青霉素 G 浓度 [10–30 mgL ^-1 ] , NP 剂量 [0.5–4.5 gL ^-1 ] 和接触时间 [5 到 200 分钟]。然后，pH [3, 5, 7, 9, 11, and], 青霉素 G 浓度 [10–30 mgL ^-1 ], NP 剂量 [0.01–1.5 gL ^-1] 和光催化降解 (UV/ZnO) 中的接触时间 [5 至 200 分钟] 进行了研究。使用分光光度计在 283 nm 波长处测量残留的青霉素 G 浓度。

结果

^{结果表明，在浓度为10 mgL -1}、pH值为5、ZnO NP用量为0.1 gL ^-1和接触时间时，使用ZnO的光催化过程[UV/ZnO]的青霉素G去除率为74.65%。180 分钟，以及降解动力学遵循准一级动力学模型。

结论

可以得出结论，该工艺的使用对于去除抗生素污染物是合适的和有效的。