Adsorption of linuron by an Algerian palygorskite modified with magnetic iron
Source abstract
Abstract
Abstract Three types of palygorskite nanoparticles for the retention of the herbicide linuron in water were tested: purified palygorskite (Pur Pal), palygorskite modified by magnetic iron oxides (FeO Pal 1 ) and this one synthesized by hydrothermal treatment (FeO Pal 2 ). The adsorbents were characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR), electron microscopy (TEM) and chemical analysis (XRF). XRD patterns indicate the presence of a magnetic Fe 2 O 3 compound, and TEM images evidence how these crystals cover the palygorskite fibers' surface with different crystallite sizes (7–15 nm in FeO Pal 1 and 30-50 nm in FeO Pal 2 ). The adsorbent mass, the contact time, the initial adsorbate concentration and the effect of temperature were evaluated for linuron retention. Adsorption kinetics revealed that adsorption followed a pseudo-second order equation. Adsorption isotherms were better fitted to the Freundlich than to the Langmuir equation. Removed linuron amounts were ranged as FeO Pal 2 (83%) > FeO Pal 1 (55%) > Pur Pal (27%). The adsorbents could be used as a cheap alternative for pesticide removal in environmentally-contaminated waters.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Pesticide and Herbicide Environmental Studies · Arsenic contamination and mitigation · Iron oxide chemistry and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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