Optimizing the Flocculation Effect of Cationic Polyacrylamide Prepared with UV-Initiated Polymerization by Response Surface Methodology
Chaochen Fu,
Zhengan Zhang,
Yuying Li,
Lin Li,
Hongtian Wang,
Shaobo Liu,
Xia Hua,
Bailian Li
Affiliations
Chaochen Fu
School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
Zhengan Zhang
International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, School of Water Resources and Environment Engineering, Nanyang Normal University, Nanyang 473061, China
Yuying Li
International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, School of Water Resources and Environment Engineering, Nanyang Normal University, Nanyang 473061, China
Lin Li
International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, School of Water Resources and Environment Engineering, Nanyang Normal University, Nanyang 473061, China
Hongtian Wang
International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, School of Water Resources and Environment Engineering, Nanyang Normal University, Nanyang 473061, China
Shaobo Liu
International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, School of Water Resources and Environment Engineering, Nanyang Normal University, Nanyang 473061, China
Xia Hua
Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd., Chengdu 611100, China
Bailian Li
International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, School of Water Resources and Environment Engineering, Nanyang Normal University, Nanyang 473061, China
Cationic polyacrylamide (CPAM) is a commonly used flocculant for water treatment. Factors that affect the flocculation effect and can be controlled manually include the type and dosage of CPAM, wastewater pH, stirring time and settling time, and their reasonable setting is critical to the flocculation effect of CPAM. In this paper, the optimal flocculation conditions of a novel CPAM were studied. First, single-factor tests were conducted to preliminarily explore the optimal range of factors that influence CPAM flocculation, and then response surface methodology (RSM) tests were performed to accurately determine the optimums of the influencing factors. The results showed that the flocculation effect was better when the intrinsic viscosity was larger or the cationic degree of CPAM was higher. The CPAM dosage, wastewater pH and stirring time significantly impacted the flocculation effect, and inflection points were observed. A model that could guide CPAM-8.14-40.2 flocculation was obtained by RSM tests. The model optimization showed that the optimal flocculation conditions of CPAM-8.14-40.2 for treating wastewater prepared with kaolin were as follows: the CPAM dosage, wastewater pH and stirring time were 5.83 mg·L−1, 7.28, and 5.95 min, respectively, and the turbidity of the treated wastewater was reduced to 6.24 NTU.
