The Coupling Use of Weak Magnetic Field and Fe0/H2O2 Process for Bisphenol a Abatement: Influence of Reaction Conditions and Mechanisms
The Coupling Use of Weak Magnetic Field and Fe0/H2O2 Process for Bisphenol a Abatement: Influence of Reaction Conditions and Mechanisms
复制标题
弱磁场与 Fe-0/H2O2 工艺耦合消除双酚 A：反应条件和机制的影响
DOI：
10.3390/w13131724
复制
发表时间：
2021-07-01
期刊：
影响因子：
3.4
通讯作者：
Zhang, Jian
中科院分区：
文献类型：
--
作者：
Liang, Liping;Xi, Fenfen;Zhang, Jian
系统研究了非均相类Fenton过程（零价铁（Fe-0）/H2 O2）与弱磁场（MWF）耦合去除双酚A（BPA）的效果。虽然Fe-0/H2 O2和WMF-Fe-0/H2 O2工艺对pH值都很敏感，但在pH值为3.0-6.0的范围内，WMF对BPA的去除效果显著，提高了0.5-9.5倍。Fe-0的表征证实了WMF在促进Fe-0的腐蚀中的作用。自由基，而不是铁中间体，负责双酚A降解。由于Cl-作为背景离子的存在及其对HO中心点的反应性，反应性氯物质（RCS，即，Cl-中心点和Cl-2（中心点））的产生，并大大有助于BPA的降解。此外，类似的降解BPA的37%和54%归因于RCS在2和100 mM的Cl的存在下，分别。然而，在WMF-Fe-0/H2 O2工艺中，在2 mM Cl-存在下检测到1.9 mg/L的ClO 3-。HCO_3 ~-通过转化RCS，可显著减少ClO_3 ~-的产生。ClO 3-的浓度下降了74%和82%，分别与剂量为1和10 mM的HCO 3-。本研究结果表明，WMF-Fe-0/H2 O2工艺是一种很有前途的去除BPA的方法。
The coupling use of the heterogeneous Fenton-like process (zero-valent iron (Fe-0)/H2O2) and weak magnetic field (MWF) for bisphenol A (BPA) abatement was systematically investigated in this study. Though both the Fe-0/H2O2 and WMF-Fe-0/H2O2 processes are sensitive to pH, WMF remarkably enhanced BPA removal under the pH range of 3.0-6.0 by 0.5-9.5 times. The characterization of Fe-0 confirmed the role of WMF in promoting the corrosion of Fe-0. Radicals, rather than Fe intermediates, were responsible for BPA degradation. Due to the presence of Cl- as the background ions and its reactivity towards HO center dot, reactive chlorine species (RCS, i.e., Cl-center dot and Cl-2(center dot)) were produced and considerably contributed to BPA degradation. In addition, similar to 37% and 54% of degraded BPA was ascribed to RCS in the presence of 2 and 100 mM of Cl, respectively. However, 1.9 mg/L of ClO3- was detected in the presence of 2 mM of Cl- in the WMF-Fe-0/H2O2 process. HCO3- could diminish ClO3- generation significantly through transforming RCS. The concentration of ClO3- decreased by 74% and 82% with dosing 1 and 10 mM HCO3-, respectively. The results of this study suggest that the WMF-Fe-0/H2O2 process is a promising approach for BPA removal.