Synthesis and characterization of hydroxyapatite nanoparticles impregnated on apple pomace to enhanced adsorption of Pb(II), Cd(II), and Ni(II) ions from aqueous solution

Abstract

Hydroxyapatite nanoparticles were synthesized, characterized, and impregnated onto apple pomace surface (HANP@AP) for efficient removal of Pb(II), Cd(II), and Ni(II) ions from water. HANP@AP was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), transmission electron microscope (TEM), X-ray diffraction (XRD), and surface area analysis. Batch sorption studies were carried out to investigate the influence of different parameters as amount of dose (g), pH, time (min), and initial concentration (mg L(-1)) on adsorption process. Experimental kinetic data followed pseudo-second-order model and equilibrium data well fitted to Langmuir adsorption model with maximum adsorption capacities of 303, 250, and 100 mg g(-1) for Pb(II), Cd(II), and Ni(II) ions, respectively. Competitive adsorption of Pb(II), Cd(II), and Ni(II) ions in presences of each other was studied to evaluate the removal efficiency of HANP@AP against multi metal-loaded water. HANP@AP was successfully applied to real industrial wastewater with 100 % removal of all three metal ions even at high concentration. HANP@AP could be recycled for four, four, and three cycles in case of Pb(II), Cd(II) and Ni(II), respectively. The study showed that HANP@AP is fast, cost effective, and environmental friendly adsorbent for removal of Pb(II), Cd(II), and Ni(II) ions from real industrial wastewater.

Synthesis, characterization, and application of nickel oxide/CNT nanocomposites to remove Pb2+ from aqueous solution

“…The permitted level of Pb 2? in drinking water is 0.01 mg L -1 [2]. The exposure of human body organs to high concentrations of Pb 2? can result in anaemia, mental disorder, and renal and liver diseases.…”

Microwave‐Assisted Synthesis of Magnetic Hydroxyapatite for Removal of Heavy Metals from Groundwater

“…The characteristic peaks for the HAP material at 31.8, 35.4, 45,4, and 62.9° are related to the ( hkl ) plane of (211), (300), (222), and (511) of the hexagonal structure of HAP. The XRD pattern exhibited a strong peak around 31.8° corresponding to the sharp pattern of the (211) plane of the HAP crystalline structure , .…”

Razor Clam (Ensis directus) Shell as a Low-Cost Adsorbent for Anionic and Cationic Dyes in Aqueous Solutions

“…This is because, in a natural setting, the presence of a mixture of toxic pollutants is more frequent than the presence of only one kind of pollutant [49]. Thus, a study on competitive adsorption aims to observe the effect of one type of pollutant on another during the treatment of real industrial wastewater [50]. Previously, environmental researchers focused on adsorption in single systems and very seldom investigate mixed adsorption systems.…”