Citation: Bo Guo, Sen Zhang, Xing Xu, Baoyu Gao, Qian Li, Qinyan Yue. An enhanced coagulation using ferric chloride and poly-ferric chloride coagulant assisted by polyamidine: Performance and mechanisms[J]. Chinese Chemical Letters, ;2023, 34(12): 108379. doi: 10.1016/j.cclet.2023.108379 shu

An enhanced coagulation using ferric chloride and poly-ferric chloride coagulant assisted by polyamidine: Performance and mechanisms

Bo Guo ^{a, b} ,
Sen Zhang ^a ,
Xing Xu ^b ,
Baoyu Gao ^{b, *,} ,
Qian Li ^b ,
Qinyan Yue ^b

a.
Shandong Institute of Metrology, Ji'nan 250014, China
b.
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Ji'nan 250100, China

baoyugao_sdu@aliyun.com

bygao@sdu.edu.cn

Received Date: 31 October 2022
Revised Date: 27 February 2023
Accepted Date: 23 March 2023
Available Online: 24 March 2023

Figures(5)

The deterioration of water caused by industrial production is a thorny problem. Solving the problem cogently through innovative coagulationstrategies has been recognized of important practical significance. In this work, a simple enhanced coagulation by using ferric chloride (FC) and poly-ferric chloride (PFC) coupled with polyamidine (PA) were tried to remove the toxic organics. The results shown that PA addition could obviously enhance coagulation performances of the iron-based coagulants. The synergic coagulation process and mechanism were studied and discussed in detail based on the coagulation behaviors, flocs properties, removal efficiency and zeta potentials. FC and PFC remove organics mainly through charge neutralization and adsorption-bridging, resulting in a good purification performance. While PA with a higher charge density showed better purification performance due to enhanced charge neutralization. It is worth mentioning that the addition of PA could make the coagulants adapt to a wider pH range, and remove the toxic organics more effectively. That is to say, the practical adaptability of the coagulant was enhanced. This work thus provides a simple strategy to effectively purify wastewater and further improve the water safety.
- Coagulation performance,
- Polyamidine,
- Ferric chloride,
- Poly-ferric chloride
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