聚合氯化铝在后续混凝絮凝过程中对高岭土凝聚的作用。
The role of polyaluminum chloride in kaolinite aggregation in the sequent coagulation and flocculation process.
作者信息
Liang Long, Tan Jiakun, Peng Yaoli, Xia Wencheng, Xie Guangyuan
机构信息
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China; National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, China.
出版信息
J Colloid Interface Sci. 2016 Apr 15;468:57-61. doi: 10.1016/j.jcis.2016.01.039. Epub 2016 Jan 21.
The role of polyaluminum chloride (PAC) in kaolinite aggregation is studied in this paper by the aggregation of kaolinite with the single and combined use of PAC and polyethylene oxide (PEO). The sequent coagulation and flocculation pattern with the combined use of PAC and PEO shows higher aggregation efficiency than that with the single use of PAC or PEO. In the sequent coagulation and flocculation pattern, the settling velocity and the Zeta potential of kaolinite steadily increase with the PAC concentration, which indicates that the role of PAC is to render the interaction between kaolinite and PEO rather than charge neutralization. This conclusion is supported by the X-ray photoelectron spectroscopy analysis, which shows steady increase of Al-OH group on kaolinite with the PAC concentration.
本文通过高岭土与聚合氯化铝（PAC）单独及与聚环氧乙烷（PEO）联合使用时的凝聚情况，研究了PAC在高岭土聚集中的作用。PAC与PEO联合使用时的连续凝聚和絮凝模式显示出比单独使用PAC或PEO更高的聚集效率。在连续凝聚和絮凝模式中，高岭土的沉降速度和zeta电位随PAC浓度稳步增加，这表明PAC的作用是增强高岭土与PEO之间的相互作用，而非电荷中和。X射线光电子能谱分析支持了这一结论，该分析表明高岭土上的Al-OH基团随PAC浓度稳步增加。
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