Abstract:The sedimentation tests for nC60 in the presence of kaolinite and montmorillonite with different mass concentration ratios were conducted and fitted with two sedimentation models. Meanwhile, the particle zeta potential and size analysis as well as SEM and TEM tests were implemented to examine the stability of the particles. It has been observed that nC60 was stable in the single system. The stability of kaolinite particles significantly decreased with increasing concentration in the single system, however, the montmorillonite particles was overall stable and it was independent of its concentration. In the binary system, the stability of nC60 decreased significantly with the increase of kaolinite concentration. The stability of nC60, however, was basically not affected by montmorillonite and had no relation to the montmorillonite concentration. The result of this study showed that the clay minerals played a role in the stability of nC60 and the difference in the structure and specific surface area of kaolinite and montmorillonite was probably the reason for their different effects on nC60 stability. The two different sedimentation models showed that semi-empirical model was better to simulate the sedimentation process related to montmorillonite particles, while the theoretical sedimentation model showed better fitting results associated with kaolinite colloids and kaolinite/nC60 mixtures. This study can serve as a reference to assess the contamination of nC60 on groundwater.
湛伟勇, 刘观胜, 钟华. 高岭土和蒙脱土存在下nC60纳米颗粒稳定性研究[J]. 中国环境科学, 2021, 41(3): 1366-1377.
ZHAN Wei-yong, LIU Guan-sheng, ZHONG Hua. Stability of nC60 nanoparticles in the presence of kaolinite and montmorillonite. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(3): 1366-1377.
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