Polyelectrolytes Ability in Reducing Atrazine Concentration in Water: Surface Effects

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.

Inflammatory reaction regulated by microglia plays a role in atrazine-induced dopaminergic neuron degeneration in the substantia nigra

“…mental degradation (Mohd Amin et al, 2014;Nasseri et al, 2014;Singh and Cameotra, 2014) caused by ATR are ongoing.…”

Clay-biodegradable polymer combination for pollutant removal from water

“…The largest effect of the CS addition in enhancing the atrazine reduction was observed at SME dosages of 10-40 mg L −1 . The high reduction is expected to be due to the attachment of CS that covers the entire clay surface during floc formation, thus creating a diffuse zone that is able to trap atrazine (Mohd Amin et al, 2014a). At an SME dosage higher than 40 mg L −1 , the clay's own ability in adsorbing the atrazine predominates, thus resulting in a higher removal than without the addition of CS.…”

“…Cationic polymers have also been proven to be efficient in e.g. atrazine reduction from water matrixes, but it requires attachment to a negatively charged surface (Mohd Amin et al, 2014a). The combination of cationic polymers with clays is thus hypothesised to enhance the micro-pollutant reduction by creating a diffuse zone (Eslinger and Pevear, 1988;Mohd Amin et al, 2014c).…”

“…atrazine reduction from water matrixes, but it requires attachment to a negatively charged surface (Mohd Amin et al, 2014a). The combination of cationic polymers with clays is thus hypothesised to enhance the micro-pollutant reduction by creating a diffuse zone (Eslinger and Pevear, 1988;Mohd Amin et al, 2014c). Clay such as smectite has a high cationic exchange capacity (80-150 meq (100 g) −1 ) and can also act as a coagulant aid in wastewater treatment for destabilisation of the other particles in water before floc formation with polymeric flocculants occurs (Sawhney and Singh, 1997;Mohd Amin et al, 2014b).…”

Larvicidal Effectiveness of Azolla pinnata against Aedes aegypti (Diptera: Culicidae) with Its Effects on Larval Morphology and Visualization of Behavioural Response

“…In addition to that, the planning of infrastructure development and management has also contributed in arthropod-borne viruses (arboviruses) diseases. World Health Organization [ 3 ] and Mohd Amin [ 4 , 5 ] have stated that unplanned urbanization with the defect in water supply and solid waste management's have mainly contributed in arboviral diseases spread by the mosquitoes. Currently, the control measures of dengue vector in Malaysia are adulticiding with permethrin, deltamethrin, and malathion and larviciding using temephos and Bacillus thuringiensis israelensis ( Bti ) [ 2 ].…”