Second generation herbicide is applied for broad leaf weeds and yearly grasses in the growing fields of bananas, pineapple, sugarcane - polluting water sources. Cyanazine removal is described on functionalized iron nano particles (nano-adsorbent). The nano-adsorbent was developed via eco-friendly method, functionalized with 1-butyl-3-methylimidazolidium bromide followed by SEM, XRD and FT-IR characterization. Remaining cyanazine in water was examined by C18-HPLC method. The batch experimentation limits were 30.0 μg/L (concen.), 30.0 min. (time) 7.0 (pH), 2.5 g/L (dose) and 25.0 °C temperature. The experimentation data followed Freundlich, Temkin Dubinin-Radushkevich and Langmuir isotherms. The values of ΔG°, ΔH° and ΔS° were -7.41, -6.47 and -6.27 kJ/mol at 20, 25 and 30 °C temps.; -8.27 kJ/mol and -7.93 × 10-3 kJ/mol K. These observations shown removal process fast and exothermic. The removal obeyed pseudo-first-order and liquid film diffusion mechanism. The removal method was quick, eco-friendly, and cheap owing to be appropriate under usual situations of water assets. The removal method can be applied for cyanazine removal in different waters.
Keywords: Cyanazine; Nano-particles; Sorption models; Thermodynamics and kinetics; Water.
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