Abstract
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•Eco-friendly synthesis of functionalized iron nanocomposite material.•Fast and selective molecular liquid phase adsorption of cyanazine in water.•Economic removal due to low contact time and dose.•Eco-friendly method due to capability to work at natural pHs of water bodies.
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.