Department of Environmental Health Engineering, Iranshahr University of Medical Sciences, Iranshahr, Iran.
Department of Environmental Health Engineering, Gonabad University of Medical Sciences, Gonabad, Iran.
J Environ Manage. 2018 Jun 1;215:316-323. doi: 10.1016/j.jenvman.2018.03.038.
We used Heat Activated of Persulfate (HAP) to decompose Penicillin G (PEN G) in aqueous solution. The effect of pH (3-11), temperature (313-353 K), and initial concentration of Sodium Persulfate (SPS) (0.05-0.5 mM) on the decomposition level of PEN G were investigated. The residue of PEN G was determined by spectrophotometry at the wavelength of 290 nm. Also, the Chemical Oxygen Demand (COD) was measured in each experiment. The Total Organic Carbon (TOC) analysis was utilized for surveying the mineralization of PEN G. In addition, based on Arrhenius equation, the activation energy of PEN G decomposition was calculated. The results indicated that the maximum PEN G removal rate was obtained at pH 5 and by increasing the doses of SPS from 0.05 to 0.5 mM, the PEN G decomposition was enhanced. It was found that an increase in temperature is accompanied by an increase in removal efficiency of PEN G. The activation energy of the studied process was determined to be 94.8 kJ mol, suggesting that a moderate activation energy is required for PEN G decomposition. The TOC measurements indicate that the HAP can efficiently mineralize PEN G. Besides, the presence of the scavengers significantly suppressed the HAP process to remove the PEN G. Overall, the results of this study demonstrate that using HAP process can be a suitable method for decomposing of PEN G in aqueous solutions.
我们使用热活化过硫酸盐（HAP）来分解水溶液中的青霉素 G（PEN G）。研究了 pH 值（3-11）、温度（313-353 K）和过硫酸钠（SPS）初始浓度（0.05-0.5 mM）对 PEN G 分解水平的影响。通过在 290nm 波长处分光光度法测定 PEN G 的残留量。此外，还在每个实验中测量了化学需氧量（COD）。总有机碳（TOC）分析用于调查 PEN G 的矿化情况。此外，基于阿仑尼乌斯方程，计算了 PEN G 分解的活化能。结果表明，在 pH 5 时 PEN G 的去除率最高，并且随着 SPS 剂量从 0.05 增加到 0.5 mM，PEN G 的分解得到了增强。发现升高温度会伴随着 PEN G 去除效率的提高。研究过程的活化能确定为 94.8 kJ/mol，表明 PEN G 分解需要适度的活化能。TOC 测量表明 HAP 可以有效地矿化 PEN G。此外，清除剂的存在显著抑制了 HAP 过程去除 PEN G。总的来说，这项研究的结果表明，使用 HAP 工艺可以是一种在水溶液中分解 PEN G 的合适方法。
