Low pressure operated ultrafiltration membrane with integration of hollow mesoporous carbon nanospheres for effective removal of micropollutants

Liao, Zhipeng; Nguyen, Minh Nhat; Wan, Gaojie; Xie, Jia; Ni, Linhan; Qi, Junwen; Li, Jiansheng; Schäfer, A.I.

doi:10.1016/j.jhazmat.2020.122779

Cited by 41 publications

(19 citation statements)

References 56 publications

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“…Nevertheless, studies emphasize that the modification of membranes with composite materials (CNTs, nanofibers, zeolites, etc.,) may be an advantage in water treatment processes, making filtration more effective in removing PhACs and reducing membrane fouling and energy consumption, which are currently the major limitations of the process [13]. This was evidenced by the aforementioned work [47], in which the rejection of tetracycline and 17β-estradiol through a conventional UF nanostructured membrane was studied, concluding that the excellent physicochemical properties of mesoporous hollow carbon nanospheres (MHCNs) and their high surface area contributed to a rejection rate of over 90% with ultrafiltration being able to operate at very low pressure. The achieved rejection rate (94%) competed with that presented by Kimura et al [39] when using polymeric RO membranes (polyamide and cellulose acetate) without any nanosized additive.…”

Section: Pharmaceutical Compound Removalmentioning

confidence: 96%

“…The skin layer structure of the membranes modified with additives and nanosized particles have been improved regarding both permeability and rejection profile, mechanical strength, stiffness, antifouling characteristics of the host polymer, and especially selectivity towards certain compounds [43][44][45][46][47][48]. An increase in water permeability and rejection performance for most of the tested PhACs was achieved due to a higher pore formation efficiency, improved wettability, and a substantial increase in active surface area.…”

Section: Pharmaceutical Compound Removalmentioning

confidence: 99%

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Removal of Contaminants from Water by Membrane Filtration: A Review

et al. 2022

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Drinking water sources are increasingly subject to various types of contamination due to anthropogenic factors and require proper treatment to remove disease-causing agents. Public drinking water systems use different treatment methods to provide safe and quality drinking water to populations. However, they are ineffective in removing contaminants that are considered a danger to the environment and therefore to humans. Several alternative treatment processes have been proposed, such as membrane filtration, as final purification methods. This paper aims to summarize the type of pollutant compounds, filtration processes, and membranes that have been most studied in this area with particular emphasis on how the modification of membranes, either the manufacturing process or the incorporation of nanomaterials, influences their performance.

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Section: Pharmaceutical Compound Removalmentioning

confidence: 96%

Section: Pharmaceutical Compound Removalmentioning

confidence: 99%

Removal of Contaminants from Water by Membrane Filtration: A Review

et al. 2022

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“…Most commonly, the removal of heavy metal ions and organic molecules from wastewater by adsorptive ultrafiltration MMMs is based on the rejection-adsorption mechanism [ 43 ]. The selective removal of such pollutants by the adsorptive ultrafiltration MMMs is demonstrated in Figure 1 .…”

Section: Mechanisms Of Adsorptive Ultrafiltration Mmmsmentioning

confidence: 99%

Recent Progress of Adsorptive Ultrafiltration Membranes in Water Treatment—A Mini Review

Zhou

Liu

et al. 2022

Membranes

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Adsorptive ultrafiltration mixed matrix membranes (MMMs) are a new strategy, developed in recent years, to remove harmful cations and small-molecule organics from wastewater and drinking water, which achieve ultrafiltration and adsorption functions in one unit and are considered to be among the promising technologies that have exhibited efficiency and competence in water reuse. This mini review concerns the research progress of adsorptive ultrafiltration MMMs for removing heavy metal ions and small-molecule organics. We firstly introduce the types and classifications of adsorptive ultrafiltration MMMs (their classifications can be established based on the type of the adsorbent used). Furthermore, we discuss the removal mechanism of adsorptive ultrafiltration MMMs, as well as summarizing the main fabrication techniques for adsorptive ultrafiltration membranes. In addition, we identified some of the issues and challenges of the practical application for adsorptive ultrafiltration.

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“…For the E2 uptake onto TNTs@AC, both TNTs and AC play significant roles in the adsorption. First, E2 molecules have high hydrophobicity, i.e., K owv = 4.01 [5], resulting in E2 that is favorable to attach on the AC surface via the hydrophobic and π−π interactions [12,41]. Second, based on the theoretical calculation of electrostatic potential (ESP) energy, the red sides have the highest ESP value to 61 kcal/mol (Figure 6a), which can be attracted to the negatively charged TNTs via the weak electrostatic attraction.…”

Section: Photoregeneration Of Tnts@acmentioning

confidence: 99%

Removal of 17β-Estradiol by Activated Charcoal Supported Titanate Nanotubes (TNTs@AC) through Initial Adsorption and Subsequent Photo-Degradation: Intermediates, DFT calculation, and Mechanisms

Huang

Pan

et al. 2020

Water

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A low-cost composite of activated charcoal supported titanate nanotubes (TNTs@AC) was developed via the facile hydrothermal method to remove the 17β-estradiol (E2, a model of pharmaceutical and personal care products) in water matrix by initial adsorption and subsequent photo-degradation. Characterizations indicated that the modification occurred, i.e., the titanate nanotubes would be grafted onto the activated charcoal (AC) surface, and the micro-carbon could modify the tubular structure of TNTs. E2 was rapidly adsorbed onto TNTs@AC, and the uptake reached 1.87 mg/g from the dual-mode model fitting. Subsequently, the adsorbed E2 could be degraded 99.8% within 2 h under ultraviolet (UV) light irradiation. TNTs@AC was attributed with a unique hybrid structure, providing the hydrophobic effect, π−π interaction, and capillary condensation for E2 adsorption, and facilitating the electron transfer and then enhancing photocatalytic ability for E2-degradation. In addition, the removal mechanism of E2 was elucidated through the density functional theory calculation. Our study is expected to provide a promising material for environmental application.

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Low pressure operated ultrafiltration membrane with integration of hollow mesoporous carbon nanospheres for effective removal of micropollutants

Cited by 41 publications

References 56 publications

Removal of Contaminants from Water by Membrane Filtration: A Review

Removal of Contaminants from Water by Membrane Filtration: A Review

Recent Progress of Adsorptive Ultrafiltration Membranes in Water Treatment—A Mini Review

Removal of 17β-Estradiol by Activated Charcoal Supported Titanate Nanotubes (TNTs@AC) through Initial Adsorption and Subsequent Photo-Degradation: Intermediates, DFT calculation, and Mechanisms

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