Use of Poly(vinyl alcohol)-Malic Acid (CLHPMA) Hydrogels and Chitosan Coated Calcium Alginate (CCCA) Microparticles as Potential Sorbent Phases for the Extraction and Quantitative Determination of Pesticides from Aqueous Solutions

Polymers

Esteban F. Durán-Lara¹  Oscar Valdés²  Daniel Bustos²  Cristian Valdés²  Diana Abril³  Efraín Polo-Cuadrado⁴  Jorge Villaseñor⁴  Gustavo Carreño⁴  Alfredo Pereira⁴  Adolfo Marican⁴  Gustavo Cabrera-Barjas⁵ 

[1] Bio and NanoMaterials Lab, Drug Delivery and Controlled Release, Universidad de Talca, Talca 3460000, Maule, Chile;Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoria de Investigación y Postgrado, Universidad Católica del Maule, Talca 3460000, Chile;Departamento de Biología y Química, Facultad de Ciencias Básicas, Universidad Católica del Maule, Talca 3460000, Chile;Instituto de Química de Recursos Naturales, Universidad de Talca, Talca 3460000, Maule, Chile;Unidad de Desarrollo Tecnológico (UDT), Universidad de Concepción, Parque Industrial Coronel, Coronel 3349001, Chile;

关键词: sorbent phase;    CLPHMA;    hydrogel;    chitosan;    alginate;    molecular dynamics simulation;   

DOI  :  10.3390/polym13223993

来源: DOAJ

【 摘 要 】

Pesticides are used worldwide to increase crop yields in agriculture. However, their toxicity and accumulation capacity can make them toxic to the environment, animals and humans. In the case of workers chronically exposed to these substances, they must be sampled continuously, so urine is an excellent option. In this sense, this study proposes to use poly(vinyl alcohol)-malic acid hydrogels, and chitosan-coated calcium alginate as new sorbent phases to be used in pesticide determination processes in urine. To better understand the behavior of these materials in the capture and desorption process, molecular dynamics simulations (MDS) were used, and desorption experiments were performed, using mechanical agitation, ultrasound, and pH variation in the desorption process, in order to optimize the parameters to obtain better recoveries. Under the optimal experimental conditions, the maximum recoveries were of the order of 11% (CFN), 3% (KCF), 53% (DMT), 18% (MTD) and 35% (MTL). Although the recoveries were not exhaustive, they are a first approximation for the use of these new sorbent phases in the determination of this type of compound in aqueous solutions and urine.

【 授权许可】

Unknown