Removal Of Pesticides From Waters With Zeolites And Zeolite-Carbon Composites

Abstract

Extended Abstract The presence of pesticides in water, soil, and air has been recognized as a major environmental problem. Only a small part of the applied amount of a pesticide is active. Most of them are distributed in the environment. Inactive pesticides remain attached to the soil or dust particles, are leached out, migrate into the groundwater, and are distributed by surface runoff. A certain quantity reaches the air and can diffuse over long distances [1]. There are few technologies for the removal of pesticides. Physical remediation, based on the process of adsorption, is one of the most widely applied methods for water purification due to its efficiency, capacity, and applicability on a large scale. In present work, we aimed to prepare and investigate unmodified and surfactant-modified fly ash-based zeolites and zeolite-carbon composites as adsorbents of four pesticides: 2-(2,4-dichlorophenoxy)acetic acid (2,4-D) and 2-(4-chloro-2-methylphenoxy)acetic acid (MCPA), 6-chloro-2-N,4-N-diethyl-1,3,5-triazine-2,4-diamine (simazine) and methyl N-(1H-benzimidazol-2-yl)carbamate (carbendazim). Adsorbents were modified