随着纳米技术的快速发展,大量的纳米碳管(CNTs)不可避免地释放到环境中。由于其较大的憎水性表面,CNTs 与有机污染物和天然有机质(NOM)强烈地相互作用。综述了 NOM存在下CNTs的环境行为,包括 NOM对 CNTs 分散特性和吸附有机污染物特性的影响。着重论述了 NOM的理化性质对CNTs 分散的影响,“拉拉链”或“胶束包裹”是主要的分散机制。强调应该对不同分散机制下分散的CNTs与有机污染物的相互作用给予更多的关注,提出了目前在液相环境中直接测定 CNTs 表面积的新思路,并对今后的研究方向进行了展望。
Rapid development of nanotechnology raises the possibility of imminent environmental release of carbon nanotubes (CNTs)due to their extensive production and usage.Enhanced hydrophobicity of CNTs promotes the strong interactions with orga-nic pollutants and natural organic matter (NOM).This paper reviews the environmental behavior of CNT in the presence of NOM, including the influence of NOM on CNTs dispersion and adsorption characteristics of organic pollutants.The“unzipping”and micelle coating have been reported as the prime dispersion mechanism depending on the physicochemical properties of NOM.The interactions between organic pollutants and dispersed CNTs by different dispersion mechanisms should be paid further attention to unveil under-lying adsorption mechanisms.Future research regarding direct measurement of CNTs surface area in the liquid phase and subsequent adsorption of organic pollutants may bring about a deeper insight to the complex environmental interactions.
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