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Pb(II) uptake onto nylon microplastics: Interaction mechanism and adsorption performance

Journal of Hazardous Materials 2019 427 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Anqi Yu, Lujian Lin, Lujian Lin, Anqi Yu, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Shuai Tang, Xuesong Wang Shuai Tang, Shuai Tang, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Lujian Lin, Shuai Tang, Shuai Tang, Xuesong Wang Xuesong Wang Xuesong Wang Xuesong Wang Lujian Lin, Shuai Tang, Xuesong Wang Shuai Tang, Anxin Feng, Xuesong Wang Shuai Tang, Shuai Tang, Anxin Feng, Shuai Tang, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Xuesong Wang Xuesong Wang

Summary

Researchers investigated how aged nylon microplastics adsorb lead(II) ions from water, finding that surface weathering increased adsorption capacity and that the process followed pseudo-second-order kinetics. The study clarifies the mechanism by which microplastics can act as vectors for heavy metal contamination in aquatic environments.

Polymers

nylon

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.

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