title: The role of polyaluminum chloride in kaolinite aggregation in the sequent coagulation and flocculation process.
abstract: 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.
authors.affiliation: School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Long
authors.initials: L
authors.lastname: Liang
authors.affiliation: School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Jiakun
authors.initials: J
authors.lastname: Tan
authors.affiliation: 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.
authors.forename: Yaoli
authors.initials: Y
authors.lastname: Peng
authors.affiliation: 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.
authors.forename: Wencheng
authors.initials: W
authors.lastname: Xia
authors.affiliation: 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. Electronic address: xieguangyuan1962@sina.com.
authors.forename: Guangyuan
authors.initials: G
authors.lastname: Xie
keywords: Aggregation; Coagulant; Kaolinite; Polyaluminum chloride; Polyethylene oxide