Nanohydroxyapatite and its polycaprolactone nanocomposite for lead sorbent from aqueous solution

Objective(s): Lead is a very strong poison in the environment. Lead toxicity can be affected on the human body and caused disease. Therefore, the design of lead sorbent can be had the great help to the medical field. In this work, the nanohydroxyapatite (n-HA) was used for removal of lead from aqueous solution. Then, polycaprolactone (PCL) nanocomposite was modified with n-HA by simple preparation method as lead sorbent. Methods: The samples were characterized by X-ray diffraction (XRD) analysis, field emission scanning electron microscope (FE-SEM), BET surface area, and Ultraviolet–visible (UV–Vis) spectroscopy. The effect of parameters including pH and temperature of solution, amount and concentration of sorbent was investigated on lead absorption. Results: FE-SEM results confirmed that the samples are in nano scale. The lead absorption was approved by UV–Vis spectroscopy and BET surface area. The absorption value was increased by increase of concentration, pH, and temperature. Conclusions: This work focuses on preparing an efficient lead sorbent system based on nanohydroxyapatite and its polycaprolactone nanocomposite. The results indicate that this nanocomposite can have a good potential to develop different adsorbents.