Department of Chemistry, Faculty of Sciences, University of Guilan, Rasht, Iran.
Department of Water and Environmental Engineering, Caspian Sea Basin Research Center, University of Guilan, Rasht, Iran.
Environ Sci Pollut Res Int. 2021 Oct;28(40):56449-56472. doi: 10.1007/s11356-021-14085-0. Epub 2021 May 31.
In this study, we investigated the efficiency of photocatalytic degradation and chemical oxygen demand (COD) reduction from woodchips industry wastewater using α-FeO@TiO@SOH. A magnetic α-FeO@TiO@SOH was prepared as a heterogeneous photo-Fenton catalyst. The Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), and elemental mapping (MAP) analyses were performed to determine the structure and morphology of synthesized photocatalysts. The response surface methodology (RSM) was used to optimize the photo-Fenton process based on a Box-Behnken design (BBD). The parameters such as catalyst dosage, HO dosage, pH, and contact time on photocatalytic degradation and the reduction of COD were studied. The maximum photocatalytic degradation of 93.75% and COD reduction of 86.54% were achieved at a dosage of the catalyst of 1 g L, HO dosage of 40 mg L, and a pH of 3.5 at 45 min. The kinetics of the photo-Fenton process was studied for the woodchips wastewater treatment under optimum conditions. The pseudo-second-order kinetic model for photocatalytic degradation and COD reduction was obtained. The results indicated that a α-FeO@TiO@SOH could be used as an effective heterogeneous photocatalyst for the treatment of woodchips industry wastewater. Preparation and application of α-FeO@TiO@SOH for photocatalytic degradation and COD reduction of woodchips industry wastewater.
在这项研究中，我们使用α-FeO@TiO@SOH 研究了木屑工业废水的光催化降解和化学需氧量（COD）降低的效率。制备了磁性α-FeO@TiO@SOH 作为非均相光芬顿催化剂。进行了傅里叶变换红外（FT-IR）、X 射线衍射（XRD）、BET、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱（EDX）和元素映射（MAP）分析，以确定合成光催化剂的结构和形态。使用响应面法（RSM）基于 Box-Behnken 设计（BBD）优化光芬顿工艺。研究了催化剂用量、HO 用量、pH 值和接触时间对光催化降解和 COD 降低的影响。在催化剂用量为 1 g L、HO 用量为 40 mg L、pH 值为 3.5 的条件下，最大光催化降解率为 93.75%，COD 去除率为 86.54%，达到 45 分钟。在最佳条件下研究了木材废水处理的光芬顿过程动力学。获得了光催化降解和 COD 还原的准二级动力学模型。结果表明，α-FeO@TiO@SOH 可作为处理木屑工业废水的有效非均相光催化剂。α-FeO@TiO@SOH 的制备及其在木屑工业废水光催化降解和 COD 降低中的应用。
