Potential environmental influence of amino acids on the behavior of ZnO nanoparticles.
Potential environmental influence of amino acids on the behavior of ZnO nanoparticles.
复制标题
氨基酸对 ZnO 纳米颗粒行为的潜在环境影响。
DOI：
10.1016/j.chemosphere.2010.12.020
复制
发表时间：
2011
期刊：
影响因子：
8.8
通讯作者：
Molina R
中科院分区：
文献类型：
--
作者：
Molina R
纳米材料进入环境后的命运是一个日益受到关注的问题，因此了解它们如何与天然有机分子相互作用非常重要，因为这可能对颗粒的行为产生重大影响。由于我们在这方面的知识不足，ZnO纳米颗粒与具有对比表面电荷的氨基酸，包括组氨酸（HIS），甘氨酸（GLY），天冬氨酸（ASP）和谷氨酸（GLU）的相互作用，这些氨基酸通常存在于自然栖息地，如植物根区，在一定的pH条件和浓度范围内进行了研究。单独氨基酸的加入导致纳米颗粒胶体zeta电位稳定性、粒度分布和团聚程度的显著变化。pH值的变化导致纳米颗粒表面电荷和流体动力学尺寸的显著变化。一般来说，粒度分布随着氨基酸浓度的增加而降低，酸性条件越强，这种影响越严重。此外，氨基酸浓度的增加导致在水性悬浮液中更稳定的纳米颗粒。组氨酸对胶体稳定性的影响最大，其次是甘氨酸、天冬氨酸和谷氨酸。这项研究说明了纳米颗粒的行为如何在天然存在的氨基酸的存在下发生变化，这是评估纳米颗粒在环境中的命运时的一个重要考虑因素。此外，在工业过程中利用氨基酸可以减少颗粒团聚，并且可以导致采用更可持续的试剂的方式。
The fate of nanomaterials when they enter the environment is an issue of increasing concern and thus it is important to know how they interact with natural organic molecules since this may have a significant impact on the particles’ behavior. Because of our poor knowledge in this regard, the interaction of ZnO nanoparticles with amino acids of contrasting surface charge, including Histidine (HIS), Glycine (GLY), Aspartic acid (ASP) and Glutamic acid (GLU) which occur commonly in natural habitats, such as the plant root zone, was investigated over a range of pH conditions and concentrations. The addition of the individual amino acid led to significant changes in nanoparticle colloidal zeta potential stability, particle size distribution and the extent of agglomeration. Variations in pH resulted in considerable changes in nanoparticle surface charge and hydrodynamic size. In general, the particle size distribution decreased as the amino acid concentration increased, with more acidic conditions exacerbating this effect. In addition, increased concentrations of amino acids resulted in more stable nanoparticles in aqueous suspensions. Histidine had the greatest effect on colloidal stability, followed by Glycine, Aspartic acid and finally Glutamic acid. This study illustrates how nanoparticle behavior may change in the presence of naturally occurring amino acids, an important consideration when assessing the fate of nanoparticles in the environment. Additionally, utilization of amino acids in industrial processes could reduce particle agglomeration and it could lead to a way of employing more sustainable reagents.
土壤中的氨基酸
影响因子：
64.8
作者：
J. M. Bremner
通讯作者：
J. M. Bremner
农业生态系统中的分解和养分循环
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
N. Juma;W. McGill
通讯作者：
W. McGill