Ultrahigh Flux and Strong Affinity Poly(N-vinylformamide)-Grafted Polypropylene Membranes for Continuous Removal of Organic Micropollutants from Water

2021 ◽  
Author(s):  
Qilin Gui ◽  
Qi Ouyang ◽  
Jinxing Zhang ◽  
Shuxian Shi ◽  
Xiaonong Chen
Keyword(s):  
Organic Micropollutants ◽  
Strong Affinity

Hydrogen bonding-induced hydrophobic assembly yields strong affinity of an adsorptive membrane for ultrafast removal of trace organic micropollutants from water

2020 ◽  
Vol 8 (32) ◽  
pp. 16487-16496 ◽  
Author(s):  
Qilin Gui ◽  
Jinxing Zhang ◽  
Kexing Hu ◽  
Qi Ouyang ◽  
Shuxian Shi ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Organic Micropollutants ◽  
Strong Affinity ◽  
Adsorptive Membrane ◽  
Trace Organic

Hydrogen bonding-induced hydrophobic assembly yields strong affinity of an adsorptive membrane for ultrafast removal of trace organic micropollutants from water.

Resorcinarene Cavitand Polymers for the Remediation of Halomethanes and 1,4-Dioxane

2019 ◽  
Author(s):  
Luke Skala ◽  
Anna Yang ◽  
Max Justin Klemes ◽  
Leilei Xiao ◽  
William Dichtel
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
High Capacity ◽  
The United States ◽  
Water Sources ◽  
Disinfection Byproducts ◽  
Porous Polymer ◽  
Organic Micropollutants ◽  
Executive Summary ◽  
Regulatory Limits

<p>Executive summary: Porous resorcinarene-containing polymers are used to remove halomethane disinfection byproducts and 1,4-dioxane from water.<br></p><p><br></p><p>Disinfection byproducts such as trihalomethanes are some of the most common micropollutants found in drinking water. Trihalomethanes are formed upon chlorination of natural organic matter (NOM) found in many drinking water sources. Municipalities that produce drinking water from surface water sources struggle to remain below regulatory limits for CHCl<sub>3</sub> and other trihalomethanes (80 mg L<sup>–1</sup> in the United States). Inspired by molecular CHCl<sub>3</sub>⊂cavitand host-guest complexes, we designed a porous polymer comprised of resorcinarene receptors. These materials show higher affinity for halomethanes than a specialty activated carbon used for trihalomethane removal. The cavitand polymers show similar removal kinetics as activated carbon and have high capacity (49 mg g<sup>–1</sup> of CHCl<sub>3</sub>). Furthermore, these materials maintain their performance in real drinking water and can be thermally regenerated under mild conditions. Cavitand polymers also outperform activated carbon in their adsorption of 1,4-dioxane, which is difficult to remove and contaminates many public water sources. These materials show promise for removing toxic organic micropollutants and further demonstrate the value of using supramolecular chemistry to design novel absorbents for water purification.<br></p>

Der Einfluss familialer Merkmale auf den Entwicklungsprozess vom Fussballtalent zum Spitzenspieler

2015 ◽  
Vol 63 (1) ◽  
Keyword(s):  
Childhood And Adolescence ◽  
Research Project ◽  
Maximum Performance ◽  
Adult Level ◽  
Strong Affinity ◽  
Youth Football ◽  
Football Team ◽  
The Family ◽  
Exogenous Factors ◽  
Level Performance

The process by which young talents develop to become top-class players once they reach the age of maximum performance is influenced by numerous factors. Among the exogenous factors, the family plays a central role. In the context of a research project carried out in cooperation with the Swiss Football Association SFV, 159 former members of the national youth football team were interviewed retrospectively, among other things concerning their family circumstances. The study is interested in understanding two issues: 1) It examines which family conditions – compared with average Swiss families – lead to success in adolescence (nomination for a national youth team). 2) Since success in adolescence by no means guarantees top-level performance at the age of maximum performance, the heterogeneity of the sample’s adult level of performance is used to compare players who later achieve greater success to the less successful players. It is found that these players come from families with many chil-dren and a strong affinity to sports. Those players who are particularly successful at the age of maximum performance also felt they received more support from their parents and siblings during childhood and adolescence than the players who went on to be less successful.

Multivariate micropollutants analysis in marine waters

1995 ◽  
Vol 32 (9-10) ◽  
pp. 341-348
Author(s):  
V. Librando ◽  
G. Magazzù ◽  
A. Puglisi
Keyword(s):  
Multivariate Data Analysis ◽  
Partial Least Squares Regression ◽  
Environmental Chemistry ◽  
Sampling Site ◽  
Principal Component ◽  
Least Squares Regression ◽  
Organic Micropollutants ◽  
Suspended Material ◽  
The Difference

The monitoring of water quality today provides a great quantity of data consisting of the values of the parameters measured as a function of time. In the marine environment, and especially in the suspended material, increasing importance is being given to the presence of organic micropollutants, particularly since some are known to be carcinogenic. As the number of measured parameters increases examining the data and their consequent interpretation becomes more difficult. To overcome such difficulties, numerous chemometric techniques have been introduced in environmental chemistry, such as Multivariate Data Analysis (MVDA), Principal Component Analysis (PCA) and Partial Least Squares Regression (PLSR). The use of the first technique in this work has been applied to the interpretation of the quality of Augusta bay, by measuring the concentration of numerous organic micropollutants, together with the classical water pollution parameters, in different sites and at different times. The MVDA has highlighted the difference between various sampling sites whose data were initially thought to be similar. Furthermore, it has allowed a choice of more significant parameters for future monitoring and more suitable sampling site locations.

Applicability of UASB sludge to agricultural lands

1998 ◽  
Vol 37 (8) ◽  
pp. 153-159 ◽  
Author(s):  
Mehmet Ali Yükselen
Keyword(s):  
Agricultural Lands ◽  
Strong Affinity ◽  
Laboratory Conditions ◽  
Nutrient Value

Investigation of dewaterability and applicability of UASB sludge to agricultural lands were the objectives of this study. Under laboratory conditions, 90% of sludge moisture percolated in 4 days. Desorption of metals such as copper and lead did not occur under normal conditions. Desorption of metals occurred only at pH 1 or less. UASB sludges have strong affinity for metals. The nutrient value of these sludges are small compared to commercial fertilizers.

A New Fluorescent Salen-uranyl Sensor for the Sub-ppm Detection of Chemical Warfare Agents

2020 ◽  
Vol 24 (20) ◽  
pp. 2378-2382
Author(s):  
Andrea Pappalardo ◽  
Chiara M.A. Gangemi ◽  
Rosa Maria Toscano ◽  
Giuseppe Trusso Sfrazzetto
Keyword(s):  
Real Time ◽  
Fluorescent Sensor ◽  
Chemical Warfare Agents ◽  
Optical Response ◽  
Chemical Warfare ◽  
Lethal Effects ◽  
Strong Affinity ◽  
Chemical Attack ◽  
Fluorescence Measurements ◽  
Warfare Agents

Real-time sensing of Chemical Warfare Agents (CWAs) is today a crucial topic to prevent the lethal effects of a terroristic chemical attack. For this reason, the development of efficient, selective, sensitive and reversible sensoristic devices, able to detect by optical response ppm levels of these compounds, is strongly required. Here, the synthesis of a new fluorescent sensor based on a salen-uranyl scaffold, functionalized with two bodipy moieties, and its application for the detection of sub-ppm levels of CWAs is reported. Detection properties were evaluated by fluorescence measurements and selectivity tests demonstrated the strong affinity for CWAs.

Membranes In Organic Micropollutants Removal

2018 ◽  
Vol 22 (11) ◽  
pp. 1070-1102 ◽  
Author(s):  
Michal Bodzek ◽  
Krystyna Konieczny
Keyword(s):  
Organic Micropollutants

Restoration Theatre and the Novel

2018 ◽  
Author(s):  
Jenny Davidson
Keyword(s):  
Eighteenth Century ◽  
Literary Form ◽  
The Novel ◽  
Cultural Transition ◽  
Strong Affinity ◽  
History Of ◽  
Restoration Theatre ◽  
Restoration Comedy ◽  
London Stage

This chapter explores the broad cultural transition from drama to novel during the Restoration period, which triggered one of the most productive periods in the history of the London stage. However, when it comes to the eighteenth century proper, the novel is more likely to be identified as the century's most significant and appealing popular genre. The chapter considers why the novel has largely superseded drama as the literary form to which ambitious and imaginative literary types without a strong affinity for verse writing would by default have turned their attention and energies by the middle of the eighteenth century. Something important may have been lost in the broad cultural transition from drama to novel. This chapter, however, contends that many things were preserved: that the novel was able to absorb many of the functions and techniques not just of Restoration comedy but of the theatre more generally.

scholarly journals Solid-phase extraction cartridges with multi-walled carbon nanotubes and effect of the oxygen functionalities on the recovery efficiency of organic micropollutants

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Marta O. Barbosa ◽  
Rui S. Ribeiro ◽  
Ana R. L. Ribeiro ◽  
M. Fernando R. Pereira ◽  
Adrián M. T. Silva
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Surface Groups ◽  
Phase Extraction ◽  
Organic Micropollutants ◽  
Oxidation Method ◽  
Hydrothermal Oxidation ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

AbstractPristine and functionalized multi-walled carbon nanotubes (MWCNTs) were investigated as adsorbent materials inside solid-phase extraction (SPE) cartridges for extraction and preconcentration of 8 EU-relevant organic micropollutants (with different pKa and polarity) before chromatographic analysis of surface water. The recoveries obtained were > 60% for 5/8 target pollutants (acetamiprid, atrazine, carbamazepine, diclofenac, and isoproturon) using a low amount of this reusable adsorbent (50 mg) and an eco-friendly solvent (ethanol) for both conditioning and elution steps. The introduction of oxygenated surface groups in the carbon nanotubes by using a controlled HNO3 hydrothermal oxidation method, considerably improved the recoveries obtained for PFOS (perfluorooctanesulfonic acid) and methiocarb, which was ascribed to the hydrogen bond adsorption mechanism, but decreased those observed for the pesticide acetamiprid and for two pharmaceuticals (carbamazepine and diclofenac), suggesting π–π dispersive interactions. Moreover, a good correlation was found between the recovery obtained for methiocarb and the amount of oxygenated surface groups on functionalized MWCNTs, which was mainly attributed to the increase of phenols and carbonyl and quinone groups. Thus, the HNO3 hydrothermal oxidation method can be used to finely tune the surface chemistry (and texture) of MWCNTs according to the specific micropollutants to be extracted and quantified in real water samples.

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