Interactions of emerging contaminants with model colloidal microplastics, C60 fullerene, and natural organic matter – effect of surface functional group and adsorbate properties

2020 ◽  
Vol 22 (5) ◽  
pp. 1190-1200
Author(s):  
Tyler Williams ◽  
Clare Walsh ◽  
Keith Murray ◽  
Mahamud Subir
Keyword(s):  
Organic Matter ◽  
Particulate Matter ◽  
Natural Organic Matter ◽  
Emerging Contaminants ◽  
Functional Group ◽  
C60 Fullerene ◽  
Surface Functional Group ◽  
Colloidal Matter ◽  
Matter Effect ◽  
Effect Of Surface

Molecular properties of emerging contaminants (ECs) and interfacial compositions of colloidal matter dictate the extent of EC–particulate matter surface interaction.

scholarly journals Super-bridging Fibrous Materials for Water Treatment: Impacts on Removal of Plastic Particles, Phosphorus and Natural Organic Matter

2021 ◽  
Author(s):  
Mathieu Lapointe ◽  
Heidi Jahandideh ◽  
Jeffrey Farner ◽  
Nathalie Tufenkji
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Emerging Contaminants ◽  
Settling Tank ◽  
Process Unit ◽  
Fibrous Materials ◽  
Floc Size ◽  
Sludge Waste ◽  
Treatment Facilities

Aggregation combined with gravitational separation is the most commonly used method to treat water globally, but it carries a significant economic and environmental burden as the chemicals used in the process (e.g., coagulants) generate ~8 million tons of metal-based sludge waste annually. To simultaneously deal with the issues of process sustainability, cost, and efficiency, we developed materials reengineered from pristine or waste fibers to serve as super-bridging agents, adsorbents, and ballast media. This study shows that these sustainable fiber-based materials considerably increased the floc size (~6630 µm) compared to conventional physicochemical treatment using a coagulant and a flocculant (~520 µm). The fiber-based materials also reduced coagulant (up to 40%) and flocculant usage (up to 60%). Moreover, the unprecedented size of flocs produced using fiber-based materials (up to ~13 times larger compared to conventional treatment) enabled easy floc removal by screening, thereby eliminating the need for a settling tank, a large and costly process unit. Our results show that fiber-based materials can be effective solutions at removing classical (e.g., natural organic matter (NOM) and phosphorus) and emerging contaminants (e.g., microplastics and nanoplastics). Due to their large size (> 3000 µm), some Si-grafted and Fe-grafted fiber-based materials can be easily recovered from settled/screened sludge and reused multiple times for coagulation/flocculation. Our results also show that these materials could be used in synergy with coagulants and flocculants to improve settling in existing water treatment processes. Furthermore, these reusable materials combined with separation via screening could allow global water treatment facilities to reduce their capital and operating costs as well as their environmental footprint.

Nanoparticle stability in lake water shaped by natural organic matter properties and presence of particulate matter

2019 ◽  
Vol 656 ◽  
pp. 338-346 ◽  
Author(s):  
Danielle L. Slomberg ◽  
Patrick Ollivier ◽  
Hélène Miche ◽  
Bernard Angeletti ◽  
Auguste Bruchet ◽  
...  
Keyword(s):  
Organic Matter ◽  
Particulate Matter ◽  
Natural Organic Matter ◽  
Lake Water ◽  
Nanoparticle Stability

Effect of natural organic matter on aggregation behavior of C60 fullerene in water

2012 ◽  
Vol 374 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Hamid Mashayekhi ◽  
Saikat Ghosh ◽  
Peng Du ◽  
Baoshan Xing
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Aggregation Behavior ◽  
C60 Fullerene

Facile crosslinking synthesis of hyperbranch-substrate nanonetwork magnetite nanocomposite for the fast and highly efficient removal of lead ions and anionic dyes from aqueous solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 67057-67071 ◽  
Author(s):  
Mingqiang Liu ◽  
Baochang Zhang ◽  
Huicai Wang ◽  
Fei Zhao ◽  
Yuan Chen ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Functional Group ◽  
Lead Ions ◽  
Surface Functional Group ◽  
Efficient Removal ◽  
Anionic Dyes ◽  
Highly Efficient ◽  
Adsorption Behaviors ◽  
Group Density ◽  
Effect Of Surface

The aim of the present work was to investigate the effect of surface functional group density on the adsorption behaviors of functionalized mesoporous Fe3O4.

scholarly journals Removal of natural organic matter and emerging contaminants from groundwater using ozonation and GAC filtration

2020 ◽  
pp. 9-15
Author(s):  
Jelena Molnar-Jazic ◽  
Marijana Kragulj-Isakovski ◽  
Aleksandra Tubic ◽  
Tamara Apostolovic ◽  
Malcolm Watson ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Emerging Contaminants ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Anthropogenic Pollution ◽  
Water Treatment Plant ◽  
Butylated Hydroxytoluene ◽  
Gas Chromatography Mass Spectrometry

This work presents results from a pilot-scale drinking water treatment plant used to investigate the performance of ozone oxidation and granulated activated carbon (GAC) adsorption in removing natural organic matter (NOM) and specific organic micropollutants from groundwater. The investigated groundwater has a relatively low NOM content (1.83?1.01 mg C/L total organic carbon, TOC). Using gas chromatography/mass spectrometry (GC/MS) screening analysis, a variety of different organic compounds were identified, including benzophenone, 2-phenoxyethanol, butylated hydroxytoluene and benzoic acid, all contaminants of emerging concern (CEC) identified by NORMAN. The application of the ozonation process resulted in a 4-20% NOM reduction, based on the TOC values. Estimated removal of CECs by ozone increased with increasing ozone dose (up to 1.0 g O3/m3) and was in the range 24-70%. Adsorption on GAC further improves total NOM and CECs removal compared to the ozonation alone. Combined use of ozone and GAC provides up to 16-33% TOC reduction as well as 70-82% CECs removal. UV absorbance values at 254 nm can serve as an indicator of aromatic carbon content in water, and were significantly reduced after ozonation and GAC filtration (by up to 50%). Among the CECs investigated, benzophenone was the most prone to oxidation/adsorption treatment. In addition to the naturally present organic matter, CECs detected can serve as indicators of anthropogenic pollution which may alter drinking water quality. Tracking their behaviour during treatment allows assessment of the efficiency of the technological line and optimization of the oxidation process in the case of groundwater pollution by infiltration.

Aqueous photoproduction of Au nanoparticles by natural organic matter: effect of NaBH4 reduction

2016 ◽  
Vol 3 (4) ◽  
pp. 707-714 ◽  
Author(s):  
Zilu Liu ◽  
Pengfei Xie ◽  
Jiahai Ma
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Au Nanoparticles ◽  
Aromatic Ketone ◽  
Matter Effect ◽  
Nabh4 Reduction

Aromatic ketone moieties of NOM dominate aqueous photoproduction of AuNPs.

Nature and Abundance of Organic Radicals in Natural Organic Matter:  Effect of pH and Irradiation

2006 ◽  
Vol 40 (19) ◽  
pp. 5897-5903 ◽  
Author(s):  
Andrea Paul ◽  
Reinhard Stösser ◽  
Andrea Zehl ◽  
Elke Zwirnmann ◽  
Rolf D. Vogt ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Organic Radicals ◽  
Effect Of Ph ◽  
Matter Effect

Super-bridging Fibrous Materials for Water Treatment: Impacts on Removal of Plastic Particles, Phosphorus and Natural Organic Matter

2021 ◽  
Author(s):  
Mathieu Lapointe ◽  
Heidi Jahandideh ◽  
Jeffrey Farner ◽  
Nathalie Tufenkji
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Emerging Contaminants ◽  
Settling Tank ◽  
Process Unit ◽  
Fibrous Materials ◽  
Floc Size ◽  
Treatment Processes ◽  
Large Size

To deal with issues of process sustainability, cost, and efficiency, we developed materials reengineered from fibers to serve as super-bridging agents, adsorbents, and ballast media. These sustainable fiber-based materials considerably increased the floc size (~6630 µm) compared to conventional physicochemical treatment using a coagulant and a flocculant (~520 µm). The materials also reduced coagulant usage (up to 40%) and flocculant usage (up to 60%). These materials could be used in synergy with coagulants and flocculants to improve settling in existing water treatment processes and allow facilities to reduce their capital and operating costs as well as their environmental footprint. Moreover, the super-sized flocs produced using fiber-based materials (up to ~13 times larger compared to conventional treatment) enabled easy floc removal by screening, eliminating the need for a settling tank, a large and costly process unit. The materials can be effective solutions at removing classical (e.g., natural organic matter (NOM) and phosphorus) and emerging contaminants (e.g., microplastics and nanoplastics). Due to their large size, Si- and Fe-grafted fiber-based materials can be easily recovered from sludge and reused multiple times.

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