Ionic dextran derivatives for removal of Fastac 10 EC from its aqueous emulsions

Ghimici, Luminiţa; Nichifor, Marieta

doi:10.1016/j.carbpol.2015.07.100

Cited by 11 publications

(2 citation statements)

References 28 publications

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“…Similar behavior was previously indicated for CS–AgONPs composite sorbents, which completely removed the permethrin pesticide in the 3 to 11 pH range [ 23 ]. Our results are also in line with those reported for several dextran derivatives with quaternary ammonium groups in the main chain, where a RE of about 90% was obtained, irrespective of the pH value [ 42 ].…”

Section: Resultssupporting

confidence: 92%

Macroporous 3D Chitosan Cryogels for Fastac 10EC Pesticide Adsorption and Antibacterial Applications

Dinu¹,

Ghimici²,

Rǎschip³

2022

Polymers

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The pesticide pollution of surface water and wastewater has been recognized as a major worldwide concern due to their persistence in the aquatic environment and the potential adverse effects on human, flora, and fauna health. Apart from pesticides, bio-contamination with various bacterial populations leads to waterborne diseases. Hence, it becomes vital to remove the above-mentioned pollutants from water using a suitable process. Consequently, our study emphasized the potential benefits of a highly porous, chemically cross-linked 3D chitosan (CSGA) cryogel in the removal of pesticides and bacteria. The CSGA sponges were prepared using a facile and cost-effective approach that consisted of a three-step cryogenic process: (i) freezing at −18 °C, (ii) storage in a frozen state for a certain period, and (iii) thawing at room temperature. Batch adsorption experiments were performed under different environments, where the effects of several parameters, such as pH, contact time, and initial pollutant concentration were evaluated to identify the appropriate adsorption conditions for maximum pesticide removal. The CSGA-based cryogel sponges exhibited a theoretical maximum adsorption capacity of 160.82 mg g−1 for the Fastac 10EC pesticide and very good recyclability at room temperature. In addition, the antibacterial activities of these sponges were also investigated against various bacterial pathogens. The rates of killing Escherichia coli, Listeria monocytogenes, and Staphylococcus aureus were close to 82%, 100%, and 99%, respectively. These results demonstrated that CSGA cryogels could be efficiently used in water remediation and find applications in the removal of pesticides and disinfection.

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Section: Resultssupporting

confidence: 92%

Macroporous 3D Chitosan Cryogels for Fastac 10EC Pesticide Adsorption and Antibacterial Applications

Dinu¹,

Ghimici²,

Rǎschip³

2022

Polymers

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“…A Cole Parmer Nine-Position Stirring Hot Plate was used for assessing the polycations based on pullulan, as flocculants, in aqueous pesticide dispersions. The flocculation tests were carried out according to Ghimici and Nichifor [29]. Thus, the addition of pullulan derivatives to simulated dispersions of pesticides (50 mL placed into 100 mL beakers) took place under stirring at a speed of 500 rpm, which was kept constant for another 3 min.…”

Section: Methodsmentioning

confidence: 99%

Grafted Pullulan Derivatives for Reducing the Content of Some Pesticides from Simulated Wastewater

Ghimici¹,

Constantin²,

Năfureanu³

2022

Polymers

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The goal of the current article was to obtain data regarding the application of a series of grafted pullulan derivatives, as flocculating agents, for removal of some pesticide formulations from model wastewater. The pullulan derivatives are cationic polyelectrolytes, with various content and length of grafted poly[(3-acrylamidopropyl)-trimethylammonium chloride] chains onto the pullulan (P-g-pAPTAC)]. The commercial pesticides are either fungicide (Bordeaux Mixture) (BM) or insecticides (Decis (Dc)—active ingredient Deltamethrin, Confidor Oil (CO)—active ingredient Imidacloprid, Confidor Energy (CE)—active ingredients Deltamethrin and Imidacloprid and Novadim Progress (NP)—active ingredient Dimethoate). The removal efficiency has been assessed by UV-Vis spectroscopy measurements as a function of some parameters, namely polymer dose, grafted chains content and length, pesticides concentration. The P-g-pAPTAC samples showed good removal efficacy at doseop, more than 94% for BM, between 84 and 90% for DC, CO and CE and around 93% for NP. The maximum percentage removal decreased with the pesticides (DC, CO, CE, NP) concentration declining; no effect of BM concentration in suspension on its removal efficiency process has been noted. Differences indicated by zeta potential and particle size distribution measurements regarding the pesticides removal mechanisms by pullulan derivatives (charge neutralization, bridging, etc.) are discussed.

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Removal of some commercial pesticides containing α-Cypermethrin, Deltamethrin and Mancozeb as active ingredients by chitosan solution

Ghimici¹,

Brunchi²,

Diaconu³

2016

Cellulose

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Ionic dextran derivatives for removal of Fastac 10 EC from its aqueous emulsions

Cited by 11 publications

References 28 publications

Macroporous 3D Chitosan Cryogels for Fastac 10EC Pesticide Adsorption and Antibacterial Applications

Macroporous 3D Chitosan Cryogels for Fastac 10EC Pesticide Adsorption and Antibacterial Applications

Grafted Pullulan Derivatives for Reducing the Content of Some Pesticides from Simulated Wastewater

Removal of some commercial pesticides containing α-Cypermethrin, Deltamethrin and Mancozeb as active ingredients by chitosan solution

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