Removal of trace nonylphenol from water in the coexistence of suspended inorganic particles and NOMs by using a cellulose-based flocculant

Yang, Zhen; Ren, Kexin; Guibal, Eric; Jia, Shuying; Shen, Jiachun; Zhang, Xuntong; Yang, Weiben

doi:10.1016/j.chemosphere.2016.07.036

Cited by 27 publications

(23 citation statements)

References 49 publications

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“…In addition, it was evident that the ZP of the MHCs became more positive with the increase of the PNAPD branch lengths. The greater cationic nature of the MHCs was believed to be helpful for achieving charge neutralization in the flocculation of the negatively charged kaolin particles and HA colloids at near-neutral pH conditions (Yang et al 2016). However, charge neutralization might not be a factor in the binding of the target antibiotics, given that neither compound has any significant proportion of anionic species in the near-neutral pH range, as indicated in the SI (Fig.…”

Section: Surface Charge Property and Hydrophilicity/hydrophobicity Of Mhcsmentioning

confidence: 99%

Role of moderately hydrophobic chitosan flocculants in the removal of trace antibiotics from water and membrane fouling control

Yang

Hou

et al. 2020

Water Research

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Section: Surface Charge Property and Hydrophilicity/hydrophobicity Of Mhcsmentioning

confidence: 99%

Role of moderately hydrophobic chitosan flocculants in the removal of trace antibiotics from water and membrane fouling control

Yang

Hou

et al. 2020

Water Research

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“…There are usually charge attraction (Zeng et al 2019 ; Jia et al 2016 ; Yang et al 2016b ; Li et al 2018 ) and hydrogen bond (Ren et al 2017 ) between the molecular chain of biopolymer-based flocculants and the surface of contaminants, which will result in the adsorption of contaminants onto the biopolymer-based flocculants molecules. When the charges carried by biopolymer-based flocculants molecules and contaminants are opposite, adsorption occurs between them, which is referred to as charge attraction; Hydrogen bond refers to the adsorption between contaminants and biopolymer-based flocculants by the attraction of hydrogen atoms and electronegative atoms.…”

Section: Flocculation Mechanisms Of Biopolymer-based Flocculantsmentioning

confidence: 99%

“…In addition to the above mechanisms, due to the abundant special functional groups of biopolymer-based flocculants, there are some other special mechanisms, such as hydrophobic interaction effect (Zeng et al 2019 ; Yang et al 2016b ; Ren et al 2017 ), coordination effect (Jia et al 2016 ; Ren et al 2017 ), chelation (Sun et al 2020b ; Tang et al 2020 ), and π-π stacking (Jia et al 2016 ).…”

Section: Flocculation Mechanisms Of Biopolymer-based Flocculantsmentioning

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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“…In this condition, the fluffy flocs are apt to disperse under the disturbance of the external environment, which makes the flocculation performance worse and deteriorated. [42] However, when the dosage of flocculant exceeds 16 mg/L, the flocculation effect on coal washing wastewater will be weakened. This is due to that the excessive dosage of coal colloidal particles surface is fully covered by the polymer chain, the number of bare active adsorption sites is reduced to lose the adsorption and bridging role.…”

Section: Mechanism Analysis Of Mw-tpmentioning

confidence: 99%

Study of microwave‐template initiated copolymerization peculiarity and evaluation on the coal floc distinctive behavior and flocculation performance

Chen

Feng

Liu

et al. 2020

J of Applied Polymer Sci

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Cationic polyacrylamide (CPAM) contains a large number of acylamino and positively charged methyl ammonium chloride groups. It has the advantages of good water solubility, strong adsorption bridging ability, enhanced charge neutralization and destabilization performance, excellent flocculation effect, and wide application. Therefore, CPAM can be used in the treatment of coal washing wastewater, and the research and development of a new flocculant with high efficiency is a hot topic in this field. Template copolymer (TPADM) of methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acrylamide (AM) was synthesized by microwave‐template initiated polymerization with sodium polyacrylate (PAAS) as template. The microwave‐template initiated polymerization is abbreviated as MW‐TP. By analyzing FTIR, 1H (13C) NMR and TG/DSC of TPADM, it was found that TPADM had obvious cationic fragment structure. In addition, the association constant (KM) and the kinetics of the template reaction showed that the MW‐TP was confirmed to be free radical initiated polymerization and I Zip‐up (ZIP) polymerization mechanism, which demonstrated the formation of the cationic fragment structure again. This new cationic fragment structure greatly enhanced the ability of charge neutralization, electrical patching and adsorption bridging, thus improving the flocculation performance. Compared with cationic P(AM‐DMC) (CPADM), Commercial cationic polypropanamide (CCPAM‐1 and CCPAM‐2), TPADM had better flocculation effect on coal washing wastewater. Under the optimum flocculation conditions (dosage = 16 mg/L, pH = 7.5), suspended solid (SS) concentration and turbidity of coal washing wastewater treated by TPADM reached 14.3 mg/L and 8.7 NTU, respectively. The floc formation, breakage, and regeneration analyses showed that the cationic fragment structure in TPADM could contribute to the formation of large and high density flocculation structure (d50 ≥ 245 μm, Df ≥ 2.05), and these coal flocs can regenerate rapidly after being broken. Finally, these large and compact flocs help to accelerate the flocs sedimentation and reduce the SS concentration and turbidity of coal washing wastewater, and enhance the effect of solid–liquid separation.

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Removal of trace nonylphenol from water in the coexistence of suspended inorganic particles and NOMs by using a cellulose-based flocculant

Cited by 27 publications

References 49 publications

Role of moderately hydrophobic chitosan flocculants in the removal of trace antibiotics from water and membrane fouling control

Role of moderately hydrophobic chitosan flocculants in the removal of trace antibiotics from water and membrane fouling control

Biopolymer-based flocculants: a review of recent technologies

Study of microwave‐template initiated copolymerization peculiarity and evaluation on the coal floc distinctive behavior and flocculation performance

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