Insight into the effect of aqueous species on microplastics removal by froth flotation: Kinetics and mechanism

Jiang, Hongru; Zhang, Yingshuang; Bian, Kai; Wang, Hui; Wang, Chongqing

doi:10.1016/j.jece.2022.107834

Cited by 23 publications

(5 citation statements)

References 62 publications

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“…Due to significant threats, it is imperative to remove the released MPs from aqueous environment. Our previous work proves that froth flotation is an effective method for MPs removal in aqueous environment ( Zhang et al, 2021b ; Jiang et al, 2022b ). A tentative process for removing the released MPs from DFMs by froth flotation was proposed.…”

Section: Resultsmentioning

confidence: 64%

“…The flotation process was well fitted by the first-order model based on the qualified R 2 (0.93–0.96). The results of froth flotation suggested the values of

and k rose with the increasing CAPB concentration ( Jiang et al, 2022b ). Under the effect of CAPB (4.00 mg/L), the removal ratio reached 80.3% in the initial 2 min, and it became constant when the duration was further extended.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, we compared the release of MPs from the normal medical mask, the N95 mask, and the activated carbon mask, and the results of released MPs were similar. In the subsequent experiment, the effects of pH (3–11), temperature (15–40 °C), HA concentration (0–100 mg/L), NaCl concentration (0–500 mg/L), incubation duration (1–7 days), and wearing time (0–8 h), on the MPs release from the normal medical masks were investigated ( Jiang et al, 2022b ). Salinity and organic matter might affect the surface properties of MPs ( Wang et al, 2021a ).…”

Section: Methodsmentioning

confidence: 99%

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Insight into the microplastics release from disposable face mask: Simulated environment and removal strategy

Jiang

Zhang

et al. 2022

Chemosphere

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Section: Resultsmentioning

confidence: 64%

“…The flotation process was well fitted by the first-order model based on the qualified R 2 (0.93–0.96). The results of froth flotation suggested the values of

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Insight into the microplastics release from disposable face mask: Simulated environment and removal strategy

Jiang

Zhang

et al. 2022

Chemosphere

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“…For each MP type, the MP removal continued to increase over the 60 min flotation period, which is notably longer than the results reported in previous studies. 47,56 This extended duration can be attributed to the high detergent concentration, exceeding the critical micelle concentration (CMC) of detergent, as discussed in the previous section. The removal efficiency of MPs was over 90% after a 60 min flotation separation for PE&PP, PES, and PA.…”

Section: ■ Results and Discussionmentioning

confidence: 91%

Removal of Microplastics/Microfibers and Detergents from Laundry Wastewater by Microbubble Flotation

Zhao,

Helgason,

Leng

et al. 2024

ACS EST Water

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Microplastics (MPs), particularly microplastic fibers (MFs), released during laundry processes, constitute a major source of primary MPs in the water environment, raising growing ecological and environmental concerns. This study developed and evaluated a microbubble-enhanced flotation approach to effectively remove MPs/ MFs and surfactants�essential components of commercial detergents and common pollutants�from laundry wastewater (LW). Through bench-scale and pilot-scale experiments, we investigated a wide range of parameters affecting recovery efficiency, focusing on MP properties (5 plastic types, 3 particle size ranges, and 4 concentration levels), water chemistry (5 detergent concentrations), and operational conditions (2 types of gases, 3 bubble size ranges, and 3 gas flow rates). Our results showed that under optimized conditions, microbubble flotation could effectively remove over 98 wt % of MPs/MFs and over 95 wt % of surfactants from LW. Moreover, the high removal rates achieved in bench-scale microbubble flotation processes were successfully reproduced in upscaling trials using a pilot-scale bubble column of 5.7 m in height. This work demonstrates the robustness and reliability of microbubble flotation for industrial LW treatment, providing a straightforward, cost-effective, and environmentally friendly solution for the concurrent removal of MPs and surfactants.

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“…They found that the first-order model used for the removal of microplastics via flotation gave a good data fit since the model considered the rectangular flotability distribution, which increased its flexibility. [48] The two-dimensional model developed in the present study to remove oil from the flowback water by flotation did not take variation of flotation parameters into consideration, and it was solved analytically and was found satisfactory in predicting the kinetics. The model also helped to find the relationship between the flotation rate constant and surfactant F I G U R E 1 Experimental setup of froth flotation system concentration.…”

Section: Model Solution and Process Parametersmentioning

confidence: 91%

Froth flotation as primary treatment of flowback water: Removal of total organic carbon and prediction of kinetics

et al. 2022

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Petroleum and exploration industries employ a hydrofracking process where a large volume of water (fracturing fluid) is injected and a fraction (known as flowback water) is returned to the surface. Froth flotation is a typical process employed for the primary treatment of water. In the present work, froth flotation has been used as a pretreatment method for real flowback water sourced from the petroleum and shale gas exploration industry. In the present work, a first‐principle based convective mass transfer model has been developed to describe the froth flotation performance. The resultant equation was solved analytically and compared with the numerical solution, and a parametric sensitivity analysis of the process performance was also undertaken. In addition, a correlation to estimate the flotation rate constant was proposed, thereby circumventing the need to obtain a large number of cumbersome parameters experimentally. Overall, this study proposes froth flotation as an efficient primary treatment method towards the separation of dispersed oil droplets from the flowback water and the corresponding prediction of kinetics using a first‐principle based transport model.

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Insight into the effect of aqueous species on microplastics removal by froth flotation: Kinetics and mechanism

Cited by 23 publications

References 62 publications

Insight into the microplastics release from disposable face mask: Simulated environment and removal strategy

Insight into the microplastics release from disposable face mask: Simulated environment and removal strategy

Removal of Microplastics/Microfibers and Detergents from Laundry Wastewater by Microbubble Flotation

Froth flotation as primary treatment of flowback water: Removal of total organic carbon and prediction of kinetics

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