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Effects of graphite particles/Fe3+ on the properties of anoxic activated sludge.
Chemosphere ( IF 8.1 ) Pub Date : 2020-04-02 , DOI: 10.1016/j.chemosphere.2020.126638 Mingshuang Zhang 1 , Lanhe Zhang 2 , Shulei Tian 3 , Xiaoyu Zhang 4 , Jingbo Guo 5 , Xiaohui Guan 1 , Ping Xu 1
Chemosphere ( IF 8.1 ) Pub Date : 2020-04-02 , DOI: 10.1016/j.chemosphere.2020.126638 Mingshuang Zhang 1 , Lanhe Zhang 2 , Shulei Tian 3 , Xiaoyu Zhang 4 , Jingbo Guo 5 , Xiaohui Guan 1 , Ping Xu 1
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In order to improve the sludge flocculation, the combination of graphite particles/Fe3+ was used to change the sludge properties and accelerate the electron transfer rate. The effects of Fe3+ on the properties of graphite particles were investigated and the synergistic effects of graphite particles/Fe3+ on the sludge properties were analyzed using N2-adsorption/desorption, scanning electron microscopy-X-ray energy dispersive analysis (SEM-EDX), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The results showed that the operation time affected the specific surface area and pore size of graphite particles. The addition of Fe3+ reduced the specific surface area and increased the pore size of graphite particles, but it did not change the crystal structure of the graphite particles and the group structure of the sludge. Under the function of graphite particles/Fe3+, Zeta potential were improved and the relative hydrophobicity of the sludge was weakened. The contact angle was slightly lowered and flocculation ability (FA) was increased. Therefore, graphite particles/Fe3+ played an important role in the charge transfer and bioflocculation improvement.
中文翻译：
石墨颗粒/ Fe3 +对缺氧活性污泥性能的影响。
为了改善污泥的絮凝效果，使用了石墨颗粒/ Fe3 +的组合物来改变污泥的性质并加快电子的传递速度。研究了Fe3 +对石墨颗粒性能的影响，并利用N2-吸附/解吸，扫描电子显微镜-X射线能量色散分析（SEM-EDX）分析了石墨颗粒/ Fe3 +对污泥性能的协同作用， X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）。结果表明，操作时间影响石墨颗粒的比表面积和孔径。Fe 3+的添加减少了比表面积并增加了石墨颗粒的孔径，但是并没有改变石墨颗粒的晶体结构和污泥的基团结构。在石墨颗粒/ Fe3 +的作用下，Zeta电位得到提高，污泥的相对疏水性减弱。接触角略微降低，絮凝能力（FA）提高。因此，石墨颗粒/ Fe3 +在电荷转移和生物絮凝改善中起着重要作用。
更新日期：2020-04-03
中文翻译：
石墨颗粒/ Fe3 +对缺氧活性污泥性能的影响。
为了改善污泥的絮凝效果，使用了石墨颗粒/ Fe3 +的组合物来改变污泥的性质并加快电子的传递速度。研究了Fe3 +对石墨颗粒性能的影响，并利用N2-吸附/解吸，扫描电子显微镜-X射线能量色散分析（SEM-EDX）分析了石墨颗粒/ Fe3 +对污泥性能的协同作用， X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）。结果表明，操作时间影响石墨颗粒的比表面积和孔径。Fe 3+的添加减少了比表面积并增加了石墨颗粒的孔径，但是并没有改变石墨颗粒的晶体结构和污泥的基团结构。在石墨颗粒/ Fe3 +的作用下，Zeta电位得到提高，污泥的相对疏水性减弱。接触角略微降低，絮凝能力（FA）提高。因此，石墨颗粒/ Fe3 +在电荷转移和生物絮凝改善中起着重要作用。
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