An effective approach for the adsorptive removal of lead from an aqueous medium using nano Prosopis Cineraria leaf ash (NPCLA): characterization, operational effects, and recyclability
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Currently, the pollution of water by heavy metals is a common environmental problem because heavy metals are non-biodegradable and dangerous to human health at very low concentrations. Lead is one of the most prevalent heavy metals utilized in various industrial processes. In this study, an adsorbent made from nano Prosopis cineraria leaf ash (NPCLA) was successfully synthesized and characterized for the first time using Brunauer–Emmett–Teller (BET) method, field emission scanning electron microscope (FESEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), and energy-dispersive analysis of X-rays (EDAX). The findings from the XRD analysis showed that the structure of the NPCLA predominantly included CaCO3 and SiO2 crystal phases. Batch adsorption experiments were performed as a function of reaction time, pH (2–10), initial concentration of lead (30–120 mg/L), and NPCLA dosage (1–3 g/L). According to the results, the lead ions were completely removed from an aqueous solution at a temperature of 25 °C with an NPCLA dosage of 2.5 g/L, an initial lead concentration of 30 mg/L, pH of 6, and after 100 min of reaction time. The NPCLA adsorbent demonstrated high stability and recyclability after six runs of the lead removal experiments. The equilibrium adsorption data were fitted to a pseudo-second-order kinetic model and the Langmuir isotherm model.
KeywordsNano adsorbent Lead removal Operational effects Characterization
This article was supported by the Petroleum University of Technology, Abadan, Iran (Project No.: 2146-3242).
Compliance with ethical standards
Conflict of interest
The authors declare no competing financial interest.
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