Next Article in Journal
Associations of Serum 25-Hydroxyvitamin D with Physical Performance and Bone Health in Overweight and Obese Older Adults
Previous Article in Journal
Promoting Healthcare Sustainability in Developing Countries: Analysis of Knowledge Management Drivers in Public and Private Hospitals of Pakistan
Open AccessArticle

Study on Analysis and Sedimentation of Alumina Nanoparticles

by 1,2,*, 1,2, 1,2, 1,2 and 3
1
College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
2
Key Laboratory of Marine Chemistry and Application (Xiamen University), Fujian Province University, Xiamen 361102, China
3
SGS-CSTC Standard Technical Services Co., Ltd., Xiamen Branch, Xiamen 361101, China
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(3), 510; https://doi.org/10.3390/ijerph16030510
Received: 26 December 2018 / Revised: 21 January 2019 / Accepted: 31 January 2019 / Published: 12 February 2019
Dispersion and aggregation behavior of nanoparticles in aquatic environment may be affected by pH, salinity, and dissolved organic matter, which would change its ecological risk. Effects of time, power and temperature on the alumina nanoparticles (nano-Al2O3) ultrasonic dispersion in water were discussed. Al2O3 had a best ultrasonic dispersion for 30 min at 105 W and 30 °C. The concentration of Al2O3 could be measured by ultraviolet (UV) spectrophotometer, and the method was efficient and accurate. Furthermore, the sedimentation rate of Al2O3 was related to pH, salinity, and its concentration in the artificial seawater. When pH was 7.31, approaching the isoelectric point of Al2O3, they aggregated and settled fastest. Settlement coefficient (k) of Al2O3 increased by 3 and 2.7 times while the salinity and its concentration increased. The sedimentation rate was higher in natural seawater than that in artificial seawater. All results indicated that nano-Al2O3 would be removed in aquatic environment. View Full-Text
Keywords: alumina nanoparticles; analysis method; sedimentation; pH; salinity alumina nanoparticles; analysis method; sedimentation; pH; salinity
Show Figures

Figure 1

MDPI and ACS Style

Zheng, X.; Li, Y.; Chen, D.; Zheng, A.; Que, Q. Study on Analysis and Sedimentation of Alumina Nanoparticles. Int. J. Environ. Res. Public Health 2019, 16, 510.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop