Polymer supported carbon for safe and effective remediation of PFOA and PFOS-contaminated water

<div> <div> <div> <p>Powdered activated carbon (PAC) is an economical sorbent for removing micropollutants from water, but it generates hazardous dust that is flammable and a respiration hazard. Additionally, the fine particles of PAC can cake and block filters and membranes, complicating its use in continuous processes. In this study, we present a sulfur polymer support for PAC that overcomes these problems. The blend of the sulfur polymer and PAC generates low dust and it does not block filters. The utility of the sorbent is demonstrated in the remediation of water contaminated with perfluorinated alkyl substances (PFASs)—persistent micropollutants that currently threaten water safety worldwide. Fundamental discoveries of PFAS self-assembly are reported, as well as testing on field samples. </p> </div> </div> </div>

Download Full-text

Polymer Supported Carbon for Safe and Effective Remediation of PFAS-Contaminated Water

10.26434/chemrxiv.7685654.v2 ◽

2019 ◽

Author(s):

Nicholas Lundquist ◽

Martin Sweetman ◽

Kymberley Scroggie ◽

Max Worthington ◽

Louisa Esdaile ◽

...

Keyword(s):

Activated Carbon ◽

Self Assembly ◽

Fine Particles ◽

Polymer Support ◽

Contaminated Water ◽

Water Safety ◽

Continuous Processes ◽

Field Samples ◽

Perfluorinated Alkyl Substances ◽

Polymer Supported

<div> <div> <div> <p>Powdered activated carbon (PAC) is an economical sorbent for removing micropollutants from water, but it generates hazardous dust that is flammable and a respiration hazard. Additionally, the fine particles of PAC can cake and block filters and membranes, complicating its use in continuous processes. In this study, we present a sulfur polymer support for PAC that overcomes these problems. The blend of the sulfur polymer and PAC generates low dust and it does not block filters. The utility of the sorbent is demonstrated in the remediation of water contaminated with perfluorinated alkyl substances (PFASs)—persistent micropollutants that currently threaten water safety worldwide. Fundamental discoveries of PFAS self-assembly are reported, as well as testing on field samples. </p> </div> </div> </div>

Download Full-text

Polymer Supported Carbon for Safe and Effective Remediation of PFAS-Contaminated Water

10.26434/chemrxiv.7685654.v1 ◽

2019 ◽

Author(s):

Nicholas Lundquist ◽

Martin Sweetman ◽

Kymberley Scroggie ◽

Max Worthington ◽

Louisa Esdaile ◽

...

Keyword(s):

Activated Carbon ◽

Self Assembly ◽

Fine Particles ◽

Polymer Support ◽

Contaminated Water ◽

Water Safety ◽

Continuous Processes ◽

Field Samples ◽

Perfluorinated Alkyl Substances ◽

Polymer Supported

<div> <div> <div> <p>Powdered activated carbon (PAC) is an economical sorbent for removing micropollutants from water, but it generates hazardous dust that is flammable and a respiration hazard. Additionally, the fine particles of PAC can cake and block filters and membranes, complicating its use in continuous processes. In this study, we present a sulfur polymer support for PAC that overcomes these problems. The blend of the sulfur polymer and PAC generates low dust and it does not block filters. The utility of the sorbent is demonstrated in the remediation of water contaminated with perfluorinated alkyl substances (PFASs)—persistent micropollutants that currently threaten water safety worldwide. Fundamental discoveries of PFAS self-assembly are reported, as well as testing on field samples. </p> </div> </div> </div>

Download Full-text

Guanidinocalix[5]arene for sensitive fluorescence detection and magnetic removal of perfluorinated pollutants

Nature Communications ◽

10.1038/s41467-019-13775-1 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 10

Author(s):

Zhe Zheng ◽

Huijuan Yu ◽

Wen-Chao Geng ◽

Xin-Yue Hu ◽

Yu-Ying Wang ◽

...

Keyword(s):

Self Assembly ◽

Simultaneous Detection ◽

Iron Oxide Nanoparticle ◽

Quantitative Detection ◽

Contaminated Water ◽

Soil Resources ◽

Toxic Materials ◽

Perfluorinated Alkyl Substances ◽

Displacement Assay ◽

Oxide Nanoparticle

AbstractPerfluorinated alkyl substances, such as perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), are toxic materials that are known to globally contaminate water, air, and soil resources. Strategies for the simultaneous detection and removal of these compounds are desired to address this emerging health and environmental issue. Herein, we develop a type of guanidinocalix[5]arene that can selectively and strongly bind to PFOS and PFOA, which we use to demonstrate the sensitive and quantitative detection of these compounds in contaminated water through a fluorescent indicator displacement assay. Moreover, by co-assembling iron oxide nanoparticle with the amphiphilic guanidinocalix[5]arene, we are able to use simple magnetic absorption and filtration to efficiently remove PFOS and PFOA from contaminated water. This supramolecular approach that uses both molecular recognition and self-assembly of macrocyclic amphiphiles is promising for the detection and remediation of water pollution.

Download Full-text

Application of Continuous Column Adsorption of Organochlorine Pesticides from Contaminated Water onto Date Stones Activated Carbon

International Journal of Environmental Research ◽

10.1007/s41742-021-00337-x ◽

2021 ◽

Author(s):

Sahmarani Rayane ◽

Chbib Chaza ◽

Net Sopheak ◽

Baroudi Moomen ◽

Ouddane Baghdad

Keyword(s):

Activated Carbon ◽

Organochlorine Pesticides ◽

Contaminated Water ◽

Column Adsorption

Download Full-text

Nopalea cochenillifera Biomass as Bioadsorbent in Water Purification

Water ◽

10.3390/w13152012 ◽

2021 ◽

Vol 13 (15) ◽

pp. 2012

Author(s):

Vitória Régia do Nascimento Lima ◽

Álvaro Gustavo Ferreira da Silva ◽

Renata Ranielly Pedroza Cruz ◽

Luana da Silva Barbosa ◽

Neilier Rodrigues da Silva Junior ◽

...

Keyword(s):

Aqueous Solution ◽

Water Purification ◽

Reducing Sugars ◽

Northeastern Brazil ◽

Human Consumption ◽

Contaminated Water ◽

Water Safety ◽

Total Coliforms ◽

Exchange Matrix ◽

Nopalea Cochenillifera

Contaminated water consumption is one of the greatest risks to human health, especially in underdeveloped and developing countries. Water is a universal right, but millions of people worldwide consume untreated surface water. The objective in this study is to evaluate water purification with Nopalea cochenillifera var. Miúda biomass. Fragments (1, 2, and 3 g) of N. cochenillifera were added to the aqueous solution containing red-yellow Chromic and Podzolic Luvisol simulating turbid water sources in Northeastern Brazil. The total, non-structural (i.e., reducing and non-reducing sugars, alcohol insoluble solids), and structural (i.e., pectin) carbohydrates, adsorption kinetics, turbidity, electrical conductivity, pH, zeta potential, and total coliforms presence were evaluated. Findings show that the Nopalea cochenillifera biomass adsorbed the suspended particles in the aqueous solution, making it more translucent due to the complex and heterogeneous adsorbents’ ion exchange matrix, but the biomass addition did not eliminate total coliforms from the aqueous solution. We concluded that the Nopalea cochenillifera biomass water treatment reduces suspended dissolved particles and turbidity, but it needs to be associated with other treatments to eliminate total coliforms and ensure water safety for human consumption.

Download Full-text

Adsorptive removal of tetracycline and lincomycin from contaminated water using magnetized activated carbon

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105998 ◽

2021 ◽

pp. 105998

Author(s):

K. Khaledi ◽

G.M. Valdes Labrada ◽

J. Soltan ◽

B. Predicala ◽

M. Nemati

Keyword(s):

Activated Carbon ◽

Contaminated Water ◽

Adsorptive Removal

Download Full-text

Utilization of fruit processing industry waste as green activated carbon for the treatment of heavy metals and chlorophenols contaminated water

Journal of Cleaner Production ◽

10.1016/j.jclepro.2017.06.083 ◽

2017 ◽

Vol 162 ◽

pp. 958-972 ◽

Cited By ~ 46

Author(s):

Sabolč Pap ◽

Tatjana Šolević Knudsen ◽

Jelena Radonić ◽

Snežana Maletić ◽

Saša M. Igić ◽

...

Keyword(s):

Heavy Metals ◽

Activated Carbon ◽

Contaminated Water ◽

Processing Industry ◽

Industry Waste ◽

Fruit Processing

Download Full-text

Characterization of Silver Loaded Activated Carbon Prepared under Supercritical Water Condition

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.288.59 ◽

2019 ◽

Vol 288 ◽

pp. 59-64

Author(s):

Narandalai Byamba-Ochir ◽

Battseveen Buyankhishig ◽

Nyamsuren Byambasuren ◽

Enkhtuul Surenjav

Keyword(s):

Electron Microscopy ◽

Activated Carbon ◽

Supercritical Water ◽

Fine Particles ◽

Batch Reactor ◽

Reaction Times ◽

Acetate Solution ◽

Reaction Rate Increase ◽

Water Condition ◽

Low Dielectric

The synthesis of silver nanoparticles loaded on the activated carbon (AC) surface were performed under SCW condition at 673 K and 31.15 MPa in a batch reactor. In supercritical region, fine particles are rapidly synthesized due to reaction rate increase at low dielectric constant of supercritical water. Samples were prepared with different concentrations of silver acetate solution and various reaction times. The synthesized silver loaded on AC particles were characterized by the Fourier transform infrared spectroscopy (FTIR),X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). FTIR spectrum of primary activated carbon, activated carbon treated under supercritical water condition and synthesized AC-Ag was compared. The particles size and crystallite size of silver deposited on AC surface were analyzed by TEM and XRD, respectively.

Download Full-text