阴离子影响从合成水和湖水中提取金红石纳米颗粒的过程。
Anions influence the extraction of rutile nanoparticles from synthetic and lake water.
作者信息
Zhao Tianrui, Liu Fangyuan, Zhang Chunpeng, Chen Xiaochen
机构信息
Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University Changchun 130021 China
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology Harbin 150090 China.
出版信息
RSC Adv. 2019 May 29;9(29):16767-16773. doi: 10.1039/c9ra02419k. eCollection 2019 May 24.
Due to their recent widespread use, nanoparticles (NPs) may contaminate water sources and pose a health risk. Thus, it is important to understand the fate of NPs in order to evaluate potential threats. Here we show that the presence of anions influences the stability of NPs in synthetic and lake water. Concentrations of 0.3 and 3 mM PO exhibited stronger stabilizing effects on NPs than 30 mM. Moreover, chloride ions promoted the coagulation of TiO NPs over a range of concentrations (0.3-30 mM elicited similar effects). On the other hand, phosphate was found to hinder the coagulation effect. These results are expected to contribute to novel water purification strategies for the efficient removal of NPs. Further experiments should focus on the mechanism of phosphate on the removal of NPs in the coagulation/flocculation/sedimentation (C/F/S) process.
由于纳米颗粒（NPs）近期的广泛使用，它们可能会污染水源并构成健康风险。因此，了解纳米颗粒的归宿对于评估潜在威胁很重要。在此我们表明，阴离子的存在会影响纳米颗粒在合成水和湖水中的稳定性。0.3 mM和3 mM的磷酸根离子浓度对纳米颗粒的稳定作用比30 mM时更强。此外，在一系列浓度范围内（0.3 - 30 mM产生类似效果），氯离子促进了TiO纳米颗粒的凝聚。另一方面，发现磷酸根会阻碍凝聚效果。这些结果有望为高效去除纳米颗粒的新型水净化策略做出贡献。进一步的实验应聚焦于磷酸根在凝聚/絮凝/沉淀（C/F/S）过程中去除纳米颗粒的机制。
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