Limits...
Polyelectrolytes ability in reducing atrazine concentration in water: surface effects.

Mohd Amin MF, Heijman SG, Lopes SI, Rietveld LC - ScientificWorldJournal (2014)

Bottom Line: This paper reports on the direct ability of two positively charged organic polyelectrolytes (natural-based and synthetic) to reduce the atrazine concentration in water.The addition of polymers exhibited a capability in reducing the atrazine concentration up to a maximum of 60% in surface-to-volume ratio experiments.However, in this study, the conventional type of isotherm was not observed.

View Article: PubMed Central - PubMed

Affiliation: Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands ; Faculty of Earth Science, Universiti Malaysia Kelantan,, UMK Kampus Jeli, 17600 Jeli, Kelantan, Malaysia.

ABSTRACT
This paper reports on the direct ability of two positively charged organic polyelectrolytes (natural-based and synthetic) to reduce the atrazine concentration in water. The adsorption study was set up using multiple glass vessels with different polymer dosing levels followed by ultrafiltration with a 1 kDa membrane. The addition of polymers exhibited a capability in reducing the atrazine concentration up to a maximum of 60% in surface-to-volume ratio experiments. In the beginning, the theoretical L-type of the isotherm of Giles' classification was expected with an increase in the dosage of the polymer. However, in this study, the conventional type of isotherm was not observed. It was found that the adsorption of the cationic polymer on the negatively charged glass surface was necessary and influential for the removal of atrazine. Surface-to-volume ratio adsorption experiments were performed to elucidate the mechanisms and the polymer configuration. The glass surface area was determined to be a limiting parameter in the adsorption mechanism.

Show MeSH

Related in: MedlinePlus

Starch adsorption isotherm based on SVR (1.8, 0.7, and 0.4 m−1).
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4150508&req=5

fig6: Starch adsorption isotherm based on SVR (1.8, 0.7, and 0.4 m−1).

Mentions: In Figure 6, the starch adsorption was observed to increase at the SVR from 1.8 to 0.7 m−1, and then the adsorption was slowly reduced in the range of 0.02 to 0.015 mg/cm2 for the SVR values lower than 0.7 m−1. The starch adsorption followed the atrazine removal isotherm in Figure 4.


Polyelectrolytes ability in reducing atrazine concentration in water: surface effects.

Mohd Amin MF, Heijman SG, Lopes SI, Rietveld LC - ScientificWorldJournal (2014)

Starch adsorption isotherm based on SVR (1.8, 0.7, and 0.4 m−1).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4150508&req=5

fig6: Starch adsorption isotherm based on SVR (1.8, 0.7, and 0.4 m−1).
Mentions: In Figure 6, the starch adsorption was observed to increase at the SVR from 1.8 to 0.7 m−1, and then the adsorption was slowly reduced in the range of 0.02 to 0.015 mg/cm2 for the SVR values lower than 0.7 m−1. The starch adsorption followed the atrazine removal isotherm in Figure 4.

Bottom Line: This paper reports on the direct ability of two positively charged organic polyelectrolytes (natural-based and synthetic) to reduce the atrazine concentration in water.The addition of polymers exhibited a capability in reducing the atrazine concentration up to a maximum of 60% in surface-to-volume ratio experiments.However, in this study, the conventional type of isotherm was not observed.

View Article: PubMed Central - PubMed

Affiliation: Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands ; Faculty of Earth Science, Universiti Malaysia Kelantan,, UMK Kampus Jeli, 17600 Jeli, Kelantan, Malaysia.

ABSTRACT
This paper reports on the direct ability of two positively charged organic polyelectrolytes (natural-based and synthetic) to reduce the atrazine concentration in water. The adsorption study was set up using multiple glass vessels with different polymer dosing levels followed by ultrafiltration with a 1 kDa membrane. The addition of polymers exhibited a capability in reducing the atrazine concentration up to a maximum of 60% in surface-to-volume ratio experiments. In the beginning, the theoretical L-type of the isotherm of Giles' classification was expected with an increase in the dosage of the polymer. However, in this study, the conventional type of isotherm was not observed. It was found that the adsorption of the cationic polymer on the negatively charged glass surface was necessary and influential for the removal of atrazine. Surface-to-volume ratio adsorption experiments were performed to elucidate the mechanisms and the polymer configuration. The glass surface area was determined to be a limiting parameter in the adsorption mechanism.

Show MeSH
Related in: MedlinePlus