A microblock structure type of anionic flocculant for hematite wastewater treatment: template copolymerization mechanism
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RESEARCH ARTICLE
A microblock structure type of anionic flocculant for hematite wastewater treatment: template copolymerization mechanism and enhanced flocculation effect Li Feng 1
&
Xuhao Li 1 & Zizeng Wang 1 & Bingzhi Liu 1 & Yuning Chen 1 & Huaili Zheng 2
Received: 1 June 2020 / Accepted: 24 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this study, a novel anionic template polymer (TPAS) with microblock structure was prepared by ultraviolet light (UV)–assisted template copolymerization (UV-TP). Acrylamide (AM) and sodium styrene sulfonate (SSS) were selected as monomers and polypropylene ammonium chloride (PAAC) was chosen as the template. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), nuclear magnetic resonance hydrogen spectroscopy (1H NMR), and thermogravimetry/differential scanning calorimetry (TG/DSC) were used to characterize the polymer chemical structure. The results showed that the attractive anionic microblock structure was formed in TPAS. Besides, the association constant (KM) and template reaction kinetics analysis results indicated that the polymerization reaction followed I (ZIP) template copolymerization mechanism. It proved the microblock structure formation again. The anionic microblock structure in TPAM could greatly improve the ability of charge neutralization, electrical patching, and bridging. After the hematite wastewater was conditioned by TPAS with this novel anionic microblock structure, the generated hematite flocs had larger particle size and denser structure. It was favorable for the reduction of turbidity, and the turbidity removal rate could reach 97.8%. TPAS showed excellent flocculation performance for hematite wastewater and had a broad market application prospect. Keywords Anionic polymer . Ultraviolet light . Template technology . Flocculation . Hematite wastewater
Introduction So far this year, the rapid construction of mining and processing plants in China has greatly promoted the development of industrialization. Meanwhile, a large amount of mining Responsible editor: Santiago V. Luis Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-10620-7) contains supplementary material, which is available to authorized users. * Li Feng [email protected] * Bingzhi Liu [email protected] 1
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
2
Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
industrial wastewater is produced during this process, and it has a high turbidity for a lot of suspended solids in it. The mining industrial wastewater is discharged into the water body without meeting standard treatment values, which seriously damages and pollutes the water environment and further threatens human health (Cengiz et al. 2009). Hematite wastewater, as
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