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Interaction of Pb(II) with microplastic-sediment complexes: Critical effect of surfactant

Environmental Pollution 2024 14 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.

Wenjuan He, Wenjuan He, Wenjuan He, Wenjuan He, Wenjuan He, Si Liu, Si Liu, Wenjuan He, Si Liu, Si Liu, Wenjuan He, Wenjuan He, Wenjuan He, Wenjuan He, Si Liu, Xiaofei Tan, Xiaofei Tan, Jinhui Huang, Wenjuan He, Jinhui Huang, Jinhui Huang, Jinhui Huang, Jinhui Huang, Jinhui Huang, Wenjuan He, Jinhui Huang, Jinhui Huang, Jinhui Huang, Jinhui Huang, Jinhui Huang, Wenjuan He, Wenjuan He, Lixiu Shi, Xiaofei Tan, Wenjuan He, Wenjuan He, Wenjuan He, Wenjuan He, Xiaofei Tan, Wenjuan He, Si Liu, Si Liu, Lixiu Shi, Wenjuan He, Wenjuan He, Enjie Li, Wenjuan He, Lixiu Shi, Lixiu Shi, Lixiu Shi, Lixiu Shi, Lixiu Shi, Wenjuan He, Lixiu Shi, Xiaofei Tan, Wenjuan He, Lixiu Shi, Lixiu Shi, Lixiu Shi, Lixiu Shi, Lixiu Shi, Lixiu Shi, Enjie Li, Enjie Li, Wei Zhang Wei Zhang Wei Zhang Wei Zhang Wei Zhang Haoliang Pang, Wei Zhang, Wei Zhang Enjie Li, Chenyu Zhang, Wei Zhang Haoliang Pang, Enjie Li, Haoliang Pang, Chenyu Zhang, Enjie Li, Enjie Li, Wei Zhang Haoliang Pang, Wei Zhang Xiaofei Tan, Lixiu Shi, Chenyu Zhang, Chenyu Zhang, Haoliang Pang, Lixiu Shi, Xiaofei Tan, Haoliang Pang, Haoliang Pang, Haoliang Pang, Xiaofei Tan, Haoliang Pang, Wei Zhang Haoliang Pang, Haoliang Pang, Xiaofei Tan, Wenjuan He, Xiaofei Tan, Xiaofei Tan, Jinhui Huang, Jinhui Huang, Wenjuan He, Enjie Li, Haoliang Pang, Wei Zhang

Summary

Researchers investigated how surfactants affect the ability of microplastic-sediment complexes to adsorb lead (Pb) in river environments. The study found that surfactants significantly altered adsorption behavior, with anionic surfactants increasing lead uptake while nonionic surfactants decreased it, suggesting that surfactant presence in polluted waters can change how heavy metals interact with microplastics in sediments.

Polymers

PA PE

Study Type Environmental

In this study, the impact of surfactants on the adsorption behavior of Pb(II) onto microplastics-sediment (MPs-S) complexes was investigated. Firstly, virgin polyamide (VPA) and polyethylene (VPE) were placed in Xiangjiang River sediment for six months to conduct in-situ aging. The results indicated that the biofilm-developed polyamide (BPA) and polyethylene (BPE) formed new oxygen-containing functional groups and different biofilm species. Furthermore, the adsorption capacity of Pb(II) in sediment (S) and MPs-S complexes was in the following order: S > BPA-S > VPE-S > VPA-S > BPE-S. The addition of sodium dodecyl benzenesulfonate (SDBS) promoted the adsorption of Pb(II), and the adsorption amount of Pb(II) increased with the higher concentration of SDBS, while adding cetyltrimethylammonium bromide (CTAB) showed the opposite result. The adsorption process of MPs-S complexes to Pb(II) was dominated by chemical adsorption, and the interaction between MPs-S complexes and Pb(II) was multilayer adsorption involving physical and chemical adsorption when the surfactants were added. Besides, the pH exerts a significant effect on Pb(II) adsorption in different MPs-S complexes, and the highest adsorption amount occurred at pH 6. Noteworthy, CTAB promoted the adsorption ability of Pb(II) when the exogenous FA was added. The binding characteristic of sediment endogenous DOM components and Pb(II) was influenced by the addition of MPs and surfactants. Finally, it confirmed that adsorption mechanisms mainly involve electrostatic and hydrophobic interaction. This study provides a new perspective to explore the environmental behaviors of Pb(II) by MPs and sediments with the addition of surfactants, which was conducive to evaluating the ecological risks of MPs and heavy metals in aquatic environments.

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