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A porous polyaniline-chitosan nanocomposite for efficient adsorption and detection of the pesticide Sumithion from water
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DOI：10.1007/s10934-026-01918-x.png)
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Abstract
En 中文
The environmental persistence of organophosphate pesticides necessitates the development of multifunctional materials capable of simultaneous remediation and monitoring. This study introduces a bifunctional polyaniline-chitosan (PANI-Ch) nanocomposite, synthesized via in-situ oxidative polymerization, designed for the high-capacity adsorption and quantitative optical detection of the pesticide Sumithion. The PANI-Ch platform exhibited an exceptional adsorption capacity of 124.7 mg/g, following a Langmuir-type monolayer process. Thermodynamic and spectroscopic analyses revealed a physisorption mechanism dominated by pi-pi stacking and hydrogen bonding, supported by a mean free energy (E) of 0.027 kJ/mol. Beyond remediation, the nanocomposite functions as a robust sensing tool; Sumithion adsorption induces precise, concentration-dependent FTIR spectral shifts in the O-H/N-H and C = C stretching regions. These optical changes allow for trace-level quantification with a Limit of Detection (LOD) of 0.5 ppb. By integrating high efficiency scavenging with built-in analytical signaling, this nanocomposite provides a versatile and advanced platform for integrated water treatment and real-time environmental monitoring.
Keywords:
Polyaniline-Chitosan nanocomposite
Organophosphate pesticide removal
Adsorption kinetics
Hydrogen bonding
pi-pi interactions
Water treatment
Environmental remediation
Journal
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3.2
Papers:
154
Citations:
5.0K
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