Tracking the adsorptive effect of nano silicate–ginkgo residue composite for Sr(II) and Cd(II) removal from aqueous solutions

Abstract Ginkgo biloba (Ginkgo)/calcium silicate nanocomposite (NG-CSA) was prepared as a novel sorbent. Nanomaterial characterized using different techniques such Fourier transform infrared spectroscopy, scanning electron microscopy, transmission X-ray diffraction, differential thermal analysis and gravimetric (DTA TG). Adsorption of Sr(II) Cd(II) ions performed taking into account significant parameters initial pH the solution, shaking time concentration metal well temperature. The acquired results were disclosed that adsorption both is notably improved NG-CSA composite. monolayer capacity for from binary system 122.45 64.68 mg/g Cd(II), respectively. kinetic studies exposed process followed nonlinear pseudo-first-order model. isotherm show extended Langmuir model more applicable than Freundlich process. value diffusion coefficient in range 10 −10 m 2 /s which indicates chemisorption nature maximum desorption 98.41% 97.66 utilized 0.3 M nitric acid. This indicated composite can be regenerated reused further wastewater.