改性超滤膜（PVDF-PVP-TiO2-FeCl3）过滤-光催化系统中磺胺嘧啶的去除：参数优化和饮用水干扰。,Environmental Science and Pollution Research

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改性超滤膜（PVDF-PVP-TiO2-FeCl3）过滤-光催化系统中磺胺嘧啶的去除：参数优化和饮用水干扰。
Environmental Science and Pollution Research Pub Date : 2020-08-15 , DOI: 10.1007/s11356-020-10426-7
Anran Zhou _{1,

2} , Yonglei Wang ₂ , Shaohua Sun ₁ , Xiaodong Xin ₁ , Mingquan Wang ₁ , Qinghua Zhao ₁ , Huanhuan Zhu ₃ , Ruibao Jia ₁

Affiliation

向TiO2中添加Fe3 +是抑制光生电子和空穴再结合从而提高TiO2光催化活性的有效方法之一。评估了PVDF-PVP-TiO2-FeCl3（PPTFe）膜过滤-光催化系统对水中痕量磺胺嘧啶（SD）去除的影响。建立了一个两因素四级实验，以优化16种自制的改性膜。然后在七个测试（SEM，EDS，膜纯水通量，接触角，孔隙率，平均孔径，ATR-FTIR）中表征了最佳膜，从而得出了最佳比例（具有1.2 wt％TiO2和0.8 wt％的PPTFe膜） FeCl3）。与原始膜相比，PPTFe膜的孔数，孔径，渗透性和亲水性均得到增强。去除效率（92。通过PPTFe膜过滤-光催化系统研究了63％的SD。根据拟一级动力学模型确定系统去除SD的反应速率（0.0214 min-1）。还对PPTFe膜过滤-光催化系统的膜类型，pH值和水质参数（Cl-，SO42-，NO3-，HA）的去除性能进行了深入研究。结果表明，酸性条件（pH = 3）有利于SD的去除，Cl-，SO42-和HA的存在可以抑制SD的去除，而NO3-的存在不受影响。此外，该系统很好地显示了实际水体中SD的去除率。最后，提出了可能的光催化降解机理。根据伪一级动力学模型确定系统的去除SD的0214 min-1）。还对PPTFe膜过滤-光催化系统的膜类型，pH值和水质参数（Cl-，SO42-，NO3-，HA）的去除性能进行了深入研究。结果表明，酸性条件（pH = 3）有利于SD的去除，Cl-，SO42-和HA的存在可以抑制SD的去除，而NO3-的存在不受影响。此外，该系统很好地显示了实际水体中SD的去除率。最后，提出了可能的光催化降解机理。根据伪一级动力学模型确定系统的去除SD的0214 min-1）。还对PPTFe膜过滤-光催化系统的膜类型，pH值和水质参数（Cl-，SO42-，NO3-，HA）的去除性能进行了深入研究。结果表明，酸性条件（pH = 3）有利于SD的去除，Cl-，SO42-和HA的存在可以抑制SD的去除，而NO3-的存在不受影响。此外，该系统很好地显示了实际水体中SD的去除率。最后，提出了可能的光催化降解机理。还对PPTFe膜过滤-光催化系统上的NO3-，HA）进行了深入研究。结果表明，酸性条件（pH = 3）有利于SD的去除，Cl-，SO42-和HA的存在可以抑制SD的去除，而NO3-的存在不受影响。此外，该系统很好地显示了实际水体中SD的去除率。最后，提出了可能的光催化降解机理。还对PPTFe膜过滤-光催化系统上的NO3-，HA）进行了深入研究。结果表明，酸性条件（pH = 3）有利于SD的去除，Cl-，SO42-和HA的存在可以抑制SD的去除，而NO3-的存在不受影响。此外，该系统很好地显示了实际水体中SD的去除率。最后，提出了可能的光催化降解机理。

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Removal of sulfadiazine in a modified ultrafiltration membrane (PVDF-PVP-TiO2-FeCl3) filtration-photocatalysis system: parameters optimizing and interferences of drinking water.

The addition of Fe3+ to TiO2 is one of the effective methods to inhibit the recombination of photogenerated electrons and holes and thus improve the photocatalytic activity of TiO2. The effect of PVDF-PVP-TiO2-FeCl3 (PPTFe) membrane filtration-photocatalytic system on the removal of trace concentration of sulfadiazine (SD) in water was evaluated. A two-factor four-level experiment was established to optimize 16 self-made modified membranes. The optimal membrane was then characterized in seven tests (SEM, EDS, membrane pure water flux, contact angle, porosity, mean pore size, ATR-FTIR), resulting in the optimal ratio (PPTFe membrane with 1.2 wt%TiO2 and 0.8 wt%FeCl3). Compared with the original membrane, the pore number, pore size, permeability, and hydrophilicity of the PPTFe membrane were all enhanced. The removal efficiency (92.63%) of SD by PPTFe membrane filtration-photocatalysis system was investigated. The reaction rate (0.0214 min-1) of the removal SD of the system was determined according to the pseudo-first-order kinetic model. The removal performance of membrane type, pH, and water quality parameters (Cl-, SO42-, NO3-, HA) on PPTFe membrane filtration-photocatalytic system were also made a deep inquiry. The results reflected that acidic conditions (pH = 3) were beneficial to SD removal, the presence of Cl-, SO42-, and HA could inhibit SD removal, while the existence of NO3- was unaffected. Furthermore, the removal rate of SD in the actual water body was displayed well in this system. Finally, the possible photocatalytic degradation mechanism was proposed.Graphical abstract.

更新日期：2020-08-15

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