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微塑料老化对吸附Cr(Ⅵ)的影响及机理研究

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微塑料经老化会增大其比表面积与表面复杂程度,大幅提高微塑料吸附性能.老化微塑料更易吸附重金属污染物,形成复合生态污染源,危害人类身体健康.采用Lagergren拟一级、拟二级吸附动力学模型和Langmuir 吸附等温线、Freundlich 吸附等温线模型,对吸附实验数据结果进行拟合分析.结果表明:老化聚乙烯(PE)最大平衡吸附量为204.113 μg·g-1,约为未老化时的1.81倍.
Study on Effect and Mechanism of Microplastic Aging on Adsorption of Cr(Ⅵ)
Aging of microplastics can increase their specific surface area and surface complexity,significantly improving their adsorption performance.Aged microplastics are more likely to adsorb heavy metal pollutants and form a composite ecological pollution source,which will seriously endanger human health.In this article,Lagergren's pseudo first order and pseudo second order adsorption kinetics models,Langmuir adsorption isotherms and Freundlich adsorption isotherm models were used to fit and analyze the adsorption experimental data results.The results showed that the maximum equilibrium adsorption capacity of aged PE was 204.113 μg·g-1,approximately 1.81 times of the value before aging.

MicroplasticsHeavy metalsAdsorptionAgingInfluencing factorsMechanisms

屠灵慧、杭小帅、暴瑞玲、王燕、朱冬冬、马小通

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中国电建集团西北勘测设计研究院有限公司,陕西 西安 710000

生态环境部南京环境科学研究所,江苏 南京 210018

河海大学水文与水资源学院,江苏 南京 210003

微塑料 重金属 吸附 老化 影响因素 机理

2024

当代化工
中国石油抚顺石化公司,中国石化抚顺石油化工研究院,沈阳市医药和化工行业联合会

当代化工

CSTPCD
影响因子:0.412
ISSN:1671-0460
年,卷(期):2024.53(12)