2013/01/01 by Shuai Tang, Lujian Lin, Xuesong Wang +3
Chemistry · Environmental Science · Materials Science · #Adsorption and biosorption for pollutant removal #Diatoms and Algae Research #Electrostatics and Colloid Interactions #Microplastics and Plastic Pollution #Recycling and Waste Management Techniques
paper · doi:10.1016/j.jhazmat.2019.121960
openalex publication_date 2013/01/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/24
Both heavy metals and microplastic pollutants are ubiquitous in the aquatic environment. The uptake of lead(II) ions from aqueous solutions onto aged nylon microplastics was investigated as a function of pH, contact time, temperature, supporting electrolyte concentration and fulvic acid concentration in batch studies. The effect of surface properties on the adsorption behavior of lead(II) was investigated with scanning electron microscope equipped with the energy dispersive X-ray spectroscope (SEM-EDAX), Fourier transform-infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), X-ray diffraction (XRD) and differential scanning calorimetric (DSC). The adsorption kinetics conformed to the pseudo-second order equation, Elovich equation and intraparticle diffusion model well. The experimental data of the adsorption process was fitted to the Langmuir and Freundlich adsorption isotherms and the parameters were estimated. The lead(II) uptake on aged nylon microplastics was spontaneous and endothermic in nature. The lead(II) adsorption was significantly dependent on the sodium chloride concentrations, initial solution pH and fulvic acid concentrations. Results of this study highlight the importance of surface carboxyl function group of aged nylon microplastics in controlling lead(II) adsorption.