Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Remediation Sign in to save

Hexabromocyclododecane alters malachite green and lead(II) adsorption behaviors onto polystyrene microplastics: Interaction mechanism and competitive effect

Chemosphere 2020 68 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Anqi Yu, Lujian Lin, Lujian Lin, Lujian Lin, Shuai Tang, Shuai Tang, Lujian Lin, Lujian Lin, Shuai Tang, Lujian Lin, Anqi Yu, Lujian Lin, Lujian Lin, Lujian Lin, Shuai Tang, Lujian Lin, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Shuai Tang, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Xuesong Wang Lujian Lin, Lujian Lin, Lujian Lin, Lujian Lin, Shuai Tang, Xuesong Wang Xuesong Wang Xuesong Wang Xuesong Wang Xuesong Wang Shuai Tang, Anqi Yu, Xuan Sun, Xuan Sun, Xuan Sun, Anqi Yu, Xuan Sun, Shuai Tang, Shuai Tang, Shuai Tang, Xuesong Wang Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Anqi Yu, Xuan Sun, Xuan Sun, Anqi Yu, Xuesong Wang Xuesong Wang

Summary

Researchers investigated how the flame retardant hexabromocyclododecane (HBCD) adsorbed onto polystyrene microplastics alters the subsequent adsorption of malachite green dye and lead ions onto these composite particles. They found that HBCD coating significantly enhanced adsorption of both contaminants — negligible on pristine PS — with intra-particle diffusion as the dominant mechanism, indicating that microplastic surface modification by co-contaminants substantially changes their pollutant-carrying capacity.

Polymers

The role of microplastics (MPs) as a carrier of pollutants in water environment is an emerging issue; however, information regarding the underlying mechanisms for malachite green (MG) and Pb(II) adsorption onto hexabromocyclododecane (HBCD)-polystyrene (PS) composites MPs (HBCD-PS MPs) is still lacking. In this study, the adsorption behaviors and mechanisms of MG and Pb(II) onto PS and HBCD-PS MPs were investigated in batch adsorption experiments. The amounts of MG and Pb(II) adsorbed onto PS MPs were negligible while the presence of HBCD significantly enhanced the adsorption of MG and Pb(II) onto HBCD-PS MPs. The results of intra-particle and film diffusion model confirmed that the adsorption of MG and Pb(II) onto HBCD-PS MPs was dominated by intra-particle diffusion. The maximum adsorption amount (q) of Pb(II) and MG onto HBCD-PS MPs followed the sequence of Pb(II) (3.33 μmol g) > MG (1.87 μmol g). In binary systems, MG and Pb(II) showed competitive adsorption onto HBCD-PS MPs, and Pb(II) exhibited relatively higher affinity to be adsorbed onto HBCD-PS MPs. Solution pH and salinity played a crucial role in the adsorption process. XPS analysis suggested that the -Br participated in the adsorption process as an electron-withdrawing group. Overall, electrostatic interaction regulated the adsorption of MG and Pb(II) onto HBCD-PS MPs. Results from this study demonstrated that HBCD could enhance the role of MPs in the MG and Pb(II) migration by changing their adsorption behavior onto MPs.

Read via DOI PubMed

Share this paper

Post Share Share Pin Email