Sand and sand-GAC filtration technologies in removing PPCPs: A review

Li, Jianan; Campos, Luiza C.; Zhang, Linyang; Xie, Wei

doi:10.1016/j.scitotenv.2022.157680

Cited by 23 publications

(5 citation statements)

References 100 publications

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“…As expected, the average removal efficiency of DEHP was approximately 2 times higher in the relatively small pore size of the PVDF membranes as 0.1 μm from N-2 WTP (44.1%) than ceramic membranes as 0.05 μm from G-1 WTP (21.7%). In addition to sieving effects, the hydrophobic interaction between solutes and foulants on the membrane surface played another important role in the performance of MF membrane systems, while biodegradation is one of the responsible treatment mechanisms for the removal of organic compounds in the sand filtration (S4), which typically uses the gelatinous biofilm of schmutzdecke that grows on the top of the sand media over time . It is common knowledge that the ceramic membrane is relatively more hydrophilic than polymeric PVDF membranes; thus, the hydrophobic adsorption between DEHP into an organic fouling layer might induce an increase in the removal efficiency of DEHP in polymeric membrane system.…”

Section: Resultsmentioning

confidence: 99%

“…In addition to sieving effects, the hydrophobic interaction between solutes and foulants on the membrane surface played another important role in the performance of MF membrane systems, while biodegradation is one of the responsible treatment mechanisms for the removal of organic compounds in the sand filtration (S4), which typically uses the gelatinous biofilm of schmutzdecke that grows on the top of the sand media over time. 55 It is common knowledge that the ceramic membrane is relatively more hydrophilic than polymeric PVDF membranes; thus, the hydrophobic adsorption between DEHP into an organic fouling layer might induce an increase in the removal efficiency of DEHP in polymeric membrane system. Furthermore, it also explained why the ceramic membranes show a similar average removal efficiency of DEHP with sand filtration (S4) (20.3%), which is considered a hydrophilic material.…”

Section: Removal Of Dehp By the Unit Process In Wtpsmentioning

confidence: 99%

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Occurrence and Treatment of DEHP in Water Treatment Plants: Case study in South Korea

Chung,

Jang,

Kim

et al. 2024

ACS EST Eng.

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Currently, a toxic plasticizer, di(2-ethylhexyl) phthalate (DEHP), is recognized as a ubiquitous pollutant in aquatic environments due to the massive utilization of plastics. However, there is still a limited understanding of the occurrence and treatment of DEHP during the potable water utilization due to a lack of long-term field data in the full-scale process of water treatment plants (WTPs). In this study, we investigated the occurrence and removal of DEHP in six conventional WTPs located at various river basins in South Korea from June 2019 to December 2021. During the observation periods, DEHP was found in all samples at concentrations ranging from 0.3 to 8.2 μg/L. Among the unit processes, the removal of DEHP was positively correlated with dissolved organic carbon removal, majorly in sand filtration and the GAC process. The advanced oxidation process exhibited low selectivity for DEHP removal efficiencies in the presence of natural organic matter due to its inhibition effect. The potential risks of DEHP on human health still exist in the surface water of South Korea for drinking water supplies, and thus, DEHP needs to be carefully monitored throughout the entire water treatment process.

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Section: Resultsmentioning

confidence: 99%

Section: Removal Of Dehp By the Unit Process In Wtpsmentioning

confidence: 99%

Occurrence and Treatment of DEHP in Water Treatment Plants: Case study in South Korea

Chung,

Jang,

Kim

et al. 2024

ACS EST Eng.

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“…There is inadequate data on the fate and behaviour of EOCs when bio-sand filtration is applied to treat drinking water. However, there is evidence that sedimentation and bio-sand filtration can substantially remove EOCs through adsorption [156]. Biosand filtration has significantly reduced pharmaceuticals including antibiotics in drinking water [157,158].…”

Section: Behaviour and Fatementioning

confidence: 99%

Drinking Water Systems as a Cocktail of Emerging Organic Contaminants: Occurrence, Public Health Risks, and Research Needs

Marumure,

Simbanegavi,

Makuvara

et al. 2023

Preprint

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Emerging organic contaminants (EOCs) of anthropogenic origins are ubiquitous in environmental compartments, including aquatic systems. Thus, EOCs have attracted considerable research and public attention due to their potential human and ecological health risks. However, compared to other aquatic environments such as wastewater systems, comprehensive reviews focussing on the occurrence and human health risks of EOCs in drinking water systems are still lacking. Therefore, to address this knowledge gap, the current review posits that drinking water systems harbour a cocktail of toxic EOCs, which pose public health risks via multiple exposure routes. In the present review, global evidence is examined to track EOCs along the source-pathway-receptor-impact-mitigation (SPRIM) continuum. Evidence shows that, various groups of EOCs, including pharmaceuticals and personal care products, solvents, plasticizers, endocrine disrupting compounds, gasoline additives, per- and polyfluoroalkyl substances (PFAS), food colourants, artificial sweeteners, and musks and fragrances, have been detected in drinking water systems. The anthropogenic sources of EOCs detected in drinking water systems, including wastewater systems and industrial emissions, are summarized. Further, the behaviour and fate of EOCs in the drinking water systems, including removal processes are discussed. Once in drinking water systems, human exposure to EOCs may occur via ingestion of contaminated drinking water and cooked foods, and possibly dermal contact and inhalation. The high-risk environments, and risk factors and behaviours predisposing humans to EOC exposure are discussed. Evidence on the human health risks of the various EOCs and a critique of the data are presented. Notably, besides inferential data, quantitative epidemiological evidence directly relating the occurrence of EOCs in drinking water systems to specific adverse human health outcomes is still scarce. Lastly, future research directions, including the need for quantitative public health risk assessment, and the application of emerging detection tools are discussed.

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“…Concurrently, inadequate infrastructure of treatment facilities contributes to the increasing complexity of water quality associated with the discharge of urban wastewater ( Kujawska et al, 2022 ). Thus, it is imperative to eliminate PPCPs from contaminated wastewater and drinking water to protect human health and the environment ( Li et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doped mesoporous activated carbon from Lentinus edodes residue: an optimized adsorbent for pharmaceuticals in aqueous solutions

Chu,

Lou,

Tan

et al. 2024

Front. Chem.

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In this study, phosphoric acid activation was employed to synthesize nitrogen-doped mesoporous activated carbon (designated as MR1) from Lentinus edodes (shiitake mushroom) residue, while aiming to efficiently remove acetaminophen (APAP), carbamazepine (CBZ), and metronidazole (MNZ) from aqueous solutions. We characterized the physicochemical properties of the produced adsorbents using scanning electron microscopy (SEM), nitrogen adsorption isotherms, and X-ray photoelectron spectroscopy (XPS). MR1, MR2, and MR3 were prepared using phosphoric acid impregnation ratios of 1, 2, and 3 mL/g, respectively. Notably, MR1 exhibited a significant mesoporous structure with a volume of 0.825 cm3/g and a quaternary nitrogen content of 2.6%. This endowed MR1 with a high adsorption capacity for APAP, CBZ, and MNZ, positioning it as a promising candidate for water purification applications. The adsorption behavior of the contaminants followed the Freundlich isotherm model, suggesting a multilayer adsorption process. Notably, MR1 showed excellent durability and recyclability, maintaining 95% of its initial adsorption efficiency after five regeneration cycles and indicating its potential for sustainable use in water treatment processes.

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Sand and sand-GAC filtration technologies in removing PPCPs: A review

Cited by 23 publications

References 100 publications

Occurrence and Treatment of DEHP in Water Treatment Plants: Case study in South Korea

Occurrence and Treatment of DEHP in Water Treatment Plants: Case study in South Korea

Drinking Water Systems as a Cocktail of Emerging Organic Contaminants: Occurrence, Public Health Risks, and Research Needs

Nitrogen-doped mesoporous activated carbon from Lentinus edodes residue: an optimized adsorbent for pharmaceuticals in aqueous solutions

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