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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.

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71305 adsorption isotherms based on SVR (1.8, 0.7, and 0.4 m−1).
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fig5: 71305 adsorption isotherms based on SVR (1.8, 0.7, and 0.4 m−1).

Mentions: To support the surface saturation theories previously mentioned and the reported theoretical example by Fleer et al. [16], we then measured the polymer adsorption on the surface. In Figure 5, the adsorption amounts of 71305 exhibited a decreasing pattern for the surface areas from 867 cm2 to 184 cm2, which were in the range of 6.6 × 10−2 to 0.3 × 10−2 mg/cm2. The achieved 71305 adsorption did not correspond to the atrazine reduction 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)

71305 adsorption isotherms 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

fig5: 71305 adsorption isotherms based on SVR (1.8, 0.7, and 0.4 m−1).
Mentions: To support the surface saturation theories previously mentioned and the reported theoretical example by Fleer et al. [16], we then measured the polymer adsorption on the surface. In Figure 5, the adsorption amounts of 71305 exhibited a decreasing pattern for the surface areas from 867 cm2 to 184 cm2, which were in the range of 6.6 × 10−2 to 0.3 × 10−2 mg/cm2. The achieved 71305 adsorption did not correspond to the atrazine reduction 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