Comparison of wastewater coagulation efficiency of pre-polymerised zirconium and traditional aluminium coagulants

Smotraiev, Roman; Nehrii, Anastasiia; Kol'tsova, E. G.; Anohina, Anastasiia; Sorochkina, Kateryna; Ratnaweera, Harsha

doi:10.1016/j.jwpe.2022.102827

Cited by 17 publications

(3 citation statements)

References 18 publications

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“…Additionally, zirconium salt coagulants exhibit many shortcomings, such as fast hydrolysis speed, low effluent pH, and difficulties in long-term storage. 8,9 Therefore, developing strategies to reduce the influence of organic matter and control the hydrolysis rate of coagulants is key to their successful application.…”

Section: Introductionmentioning

confidence: 99%

Insighting the interaction mechanism of zirconium xerogel coagulants with humic acid: the protective effect of acetylacetone

Guo,

Xu,

et al. 2024

Environ. Sci.: Water Res. Technol.

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Section: Introductionmentioning

confidence: 99%

Insighting the interaction mechanism of zirconium xerogel coagulants with humic acid: the protective effect of acetylacetone

Guo,

Xu,

et al. 2024

Environ. Sci.: Water Res. Technol.

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“…When simple aluminium or iron salts, such as Al 2 (SO 4 ) 3 or Fe 2 (SO 4 ) 3 , are employed, rapid precipitation can occur, and the formation of corresponding metal hydroxides, namely Al(OH) 3 and Fe(OH) 3 , results in a reduction in positive surface charges and, consequently, decreases the adsorption of negatively charged organic colloids which initially occurs. On the contrary, during the application of pre-polymerised coagulants, such as PAC, the respective precipitation process is delayed; therefore, a better adsorption and removal of NOM can be achieved [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Novel Process for the On-Site Preparation and Application of Polyferric Chloride (PFC) for Surface Water Treatment

Gkotsis,

Mitrakas,

Zouboulis

2023

Sustainability

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This is the first study to describe a novel, patented process for the on-site synthesis and subsequent direct utilisation of Polyferric Chloride (PFC) at low Fe concentration dosing, which aims to facilitate the potential replacement of Polyaluminium Chloride (PAC) during surface water treatment (e.g., from reservoirs) for drinking water production. For this purpose, the PFC was synthesised and subsequently used as a coagulant in simulated surface water samples under different synthesis and coagulation/flocculation conditions, namely for different pre-hydrolysed Fe concentrations, pre-hydrolysis pH, coagulation pH, and flocculation times. The effectiveness of PFC was examined mainly in terms of total organic carbon (TOC) removal and the residual Fe concentration. The obtained results showed that the pre-hydrolysed Fe concentration at 0.5 ± 0.25%, pre-hydrolysis at pH 2.5 ± 0.25, coagulation at pH 5.5–7.0 and a flocculation time of 5 min could result in the highest TOC removal (i.e., residual values < 0.60 mg/L) and the lowest residual Fe concentration (<5 μg Fe/L), which is acceptable for a water quality assessment. These values are also substantially lower when compared to the respective TOC and residual metal concentrations using PAC (usually, the relevant obtained values are around TOC > 1 mg/L and Al > 50 μg/L).

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“…Various occulants and coagulants are used in the treatment of turbid water. These substances are divided into two categories: inorganic coagulants (aluminium and iron salts) and organic polymers (polyacrylamide derivatives and polyethylene amine) [14]. Chemical coagulants are preferred due to their low cost, availability, and high e ciency.…”

Section: Introductionmentioning

confidence: 99%

Use of Biomass for Removing Wastewater Turbidity: Characterization and Optimization Study

Tayeb,

Othman,

Monazie

et al. 2023

Preprint

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In the present study, a commercially available mushroom is used as a natural flocculent at different dosages to treat a synthetic suspension containing different concentrations of local clay. Response Surface Methodology (RSM) is used to optimize the values of operating parameters based on residual turbidity and percent turbidity reduction. The highest percent reduction in water turbidity was obtained at a pH of 6.7. The lowest value for residual turbidity (11.1 NTU) is achieved by a clay suspension with a concentration of 1000 ppm, and the highest value for residual turbidity (22 NTU) is achieved by a clay suspension with a concentration of 6000 ppm. The optimum values of mushroom dose were 0.2 and 0.1 g for clay concentrations of 4000 and 5000 ppm, respectively, for a time of 120 min. Response Surface Methodology (RSM) is used to optimize the values of the operating parameters and the results of the model fitted well with the experimental results.

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Comparison of wastewater coagulation efficiency of pre-polymerised zirconium and traditional aluminium coagulants

Cited by 17 publications

References 18 publications

Insighting the interaction mechanism of zirconium xerogel coagulants with humic acid: the protective effect of acetylacetone

Insighting the interaction mechanism of zirconium xerogel coagulants with humic acid: the protective effect of acetylacetone

A Novel Process for the On-Site Preparation and Application of Polyferric Chloride (PFC) for Surface Water Treatment

Use of Biomass for Removing Wastewater Turbidity: Characterization and Optimization Study

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