Hydrophobically Modified Polyacrylamide Synthesis and Application in Water Treatment

Liu, Yi; Zheng, Huaili; Li, Dai; Li, Fengting; Zhu, Guocheng; Guan, Qingqing; Sun, Yongjun; Tang, Xiaomin

doi:10.14233/ajchem.2014.16860

Cited by 9 publications

(5 citation statements)

References 60 publications

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“…Based on the available literature and the results of the laboratory synthesis process [ 34 , 35 , 36 , 37 , 38 , 39 ], the following six factors were selected as significant parameters for investigating the grafting efficiency of glutathione: temperature, stirring rate, polyacrylamide/glutathione mass ratio (P/G), reaction time, initial pH, and formaldehyde concentration. Since the grafted polyacrylamide–glutathione contains sulfhydryl groups capable of chelating cadmium ions, these parameters will directly impact the cadmium ion removal efficiency of the final product.…”

Section: Discussionmentioning

confidence: 99%

Preparation of Heavy Metal Trapping Flocculant Polyacrylamide–Glutathione and Its Application for Cadmium Removal from Water

et al. 2023

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In this study, a heavy metal trapping gel with multiple ligand groups was prepared for the first time using response surface methodology. The gel was produced by condensing and grafting glutathione as a grafting monomer onto the main polyacrylamide chain, based on the Mannich reaction mechanism with formaldehyde. FTIR, SEM, TG-DSC, and zeta potentials were used to characterize the gel. The results demonstrated that the gel was morphologically folded and porous, with a net-like structure, which enhanced its net trapping and sweeping abilities, and that glutathione was used to provide sulfhydryl groups to boost the metal trapping ability of polyacrylamide. Coagulation experiments showed that the highest efficiency of the removal of Cd ions from water samples was achieved when the concentration of polyacrylamide–glutathione was 84.48 mgL−1, the concentration of Cd was 10.0 mgL−1, the initial turbidity was 10.40 NTU, and the initial pH was 9.0. Furthermore, the presence of two cations, Cu and Zn, had an inhibitory effect on the removal of Cd ions. In addition, analysis of the zeta potential revealed the flocculation of polyacrylamide–glutathione. The flocculation mechanism of glutathione is mainly chelation, adsorption bridging, and netting sweeping.

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Section: Discussionmentioning

confidence: 99%

Preparation of Heavy Metal Trapping Flocculant Polyacrylamide–Glutathione and Its Application for Cadmium Removal from Water

et al. 2023

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“…Due to the randomness of this process, hydrophobic micro blocks are randomly distributed in the polymer chain. Considering the influence of hydrophobic monomers on polymer solubility and the polymerization inhibition of surfactants, the proportion of each component should be strictly controlled to obtain the best supramolecular aggregates [ 113 , 114 ].…”

Section: How To Fabricate Supramolecular Polymers?mentioning

confidence: 99%

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

et al. 2022

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High molecular polymers have been widely studied and applied in the field of enhanced oil recovery (EOR). At present, the focus of research has been changed to the design of polymer networks with unique properties such as anti-temperature and anti-salinity, good injection and so on. Supramolecular polymers have high viscoelasticity as well as excellent temperature, salt resistance and injection properties. Can supramolecular polymers become another material choice for polymer flooding to enhance oil recovery? The present review aims to systematically introduce supramolecular polymers, including its design strategy, interactions and rheological properties, and address three main concerns: (1) Why choose supramolecular polymers? (2) How do we synthesize and characterize supramolecular polymers in the field of oilfield chemistry? (3) What has been the application progress of supramolecular polymers in improving oil recovery? The introduction of a supramolecular interaction system provides a new idea for polymer flooding and opens up a new research direction to improve oil recovery. Aiming at the “reversible dynamic” supramolecular polymers, the supramolecular polymers are compared with the conventional covalent macromolecular polymer networks, and the challenges and future research directions of supramolecular polymers in EOR are discussed. Finally, the author’s viewpoints and perspectives in this emerging field are discussed.

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“…It can aggregate the colloidal substances and particulate matters suspended in the liquid to form larger flocs, and then promote the settlement of these particles from the stable suspension (Salehizadeh et al 2018). As the core of flocculation, flocculants' characteristics directly determine the efficiency of water Responsible Editor: Angeles Blanco treatment (Liao et al 2014). According to the chemical composition, the flocculant can be divided into inorganic coagulants and organic flocculants.…”

Section: Introductionmentioning

confidence: 99%

Biopolymer-based flocculants: a review of recent technologies

Jiang

Li²,

Tang

et al. 2021

Environ Sci Pollut Res

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Biopolymer-based flocculants have become a potential substitute for inorganic coagulants and synthetic organic flocculants due to their wide natural reserves, environmental friendliness, easy natural degradation, and high material safety. In recent years, with more and more attention to clean technologies, a lot of researches on the modification and application of biopolymer-based flocculants have been carried out. The present paper reviews the latest important information about the base materials of biopolymer-based flocculants, including chitosan, starch, cellulose, and lignin etc. This review also highlights the various modification methods of these base materials according to reaction types in detail. Via the recent researches, the flocculation mechanisms of biopolymer-based flocculants, such as adsorption, bridging, charge neutralization, net trapping, and sweeping, as well as, some other special mechanisms are comprehensively summarized. This paper also focuses on the water treatment conditions, the removal efficiency, and advantages of biopolymer-based flocculants in applications. Further, this review sheds light on the future perspectives of biopolymer-based flocculants, which may make progress in the sources of base materials, modification processes, multi-function, and deepening application researches. We believe that this review can guide the further researches and developments of biopolymer-based flocculants in the future, to develop them with a higher efficiency, a lower cost, more safety, and multi-function for more diversified applications.

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Hydrophobically Modified Polyacrylamide Synthesis and Application in Water Treatment

Cited by 9 publications

References 60 publications

Preparation of Heavy Metal Trapping Flocculant Polyacrylamide–Glutathione and Its Application for Cadmium Removal from Water

Preparation of Heavy Metal Trapping Flocculant Polyacrylamide–Glutathione and Its Application for Cadmium Removal from Water

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

Biopolymer-based flocculants: a review of recent technologies

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