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The effect of electrolytes on the aggregation kinetics of three different ZnO nanoparticles in water.
Sci Total Environ. 2015 Oct 15; 530-531:183-190.ST

Abstract

Nanoscale ZnO particles are receiving increasing attention because they are widely used in commercial products, but they do have potentially hazardous effects. The aggregation behavior of ZnO nanoparticles (NPs) in the environment contributes to the real risk assessment of nano-toxicity, and the real size of the nano-aggregates should be investigated. In this study, the influences of electrolytes on the stabilities of three ZnO NPs were compared: the commercial powder (NP1), the lab synthesized suspension (NP2) and the commercial suspension (NP3). The initial particle size of NP2 and NP3 in water was at a nanoscale whilst NP1 tended to form microscale aggregates. The capping reagents helped to retain their suspension. The stability of ZnO NPs depends on their zeta potential under specific pH value, ionic types and ionic strength. In general, neutralization plays a major role in aggregation. The effect of divalent counter-ions on ZnO NP aggregation was more than that of monovalent ones. The stabilities of NP2 and NP3 were confirmed by the large critical coagulation concentration (CCC) values of these particles. The experimental results also fit the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The aggregation of different ZnO NPs is relevant to their basic properties and is influenced by electrolytes, which decreases the possibility of the penetration of NPs into cells to cause toxicity in the environment. An understanding of the basic properties of NPs is crucial for assessing their fate in the environment as well as for setting up usage regulation and treatment strategy.

Authors+Show Affiliations

Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan, ROC.Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan, ROC.Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan, ROC.Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 402, Taiwan, ROC.Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan, ROC. Electronic address: yhs@ntu.edu.tw.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26042532

Citation

Peng, Yu-Huei, et al. "The Effect of Electrolytes On the Aggregation Kinetics of Three Different ZnO Nanoparticles in Water." The Science of the Total Environment, vol. 530-531, 2015, pp. 183-190.
Peng YH, Tso CP, Tsai YC, et al. The effect of electrolytes on the aggregation kinetics of three different ZnO nanoparticles in water. Sci Total Environ. 2015;530-531:183-190.
Peng, Y. H., Tso, C. P., Tsai, Y. C., Zhuang, C. M., & Shih, Y. H. (2015). The effect of electrolytes on the aggregation kinetics of three different ZnO nanoparticles in water. The Science of the Total Environment, 530-531, 183-190. https://doi.org/10.1016/j.scitotenv.2015.05.059
Peng YH, et al. The Effect of Electrolytes On the Aggregation Kinetics of Three Different ZnO Nanoparticles in Water. Sci Total Environ. 2015 Oct 15;530-531:183-190. PubMed PMID: 26042532.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effect of electrolytes on the aggregation kinetics of three different ZnO nanoparticles in water. AU - Peng,Yu-Huei, AU - Tso,Chih-Ping, AU - Tsai,Yi-Chun, AU - Zhuang,Cheng-Ming, AU - Shih,Yang-Hsin, Y1 - 2015/05/28/ PY - 2015/01/14/received PY - 2015/05/15/revised PY - 2015/05/15/accepted PY - 2015/6/5/entrez PY - 2015/6/5/pubmed PY - 2015/12/15/medline KW - Aggregation KW - Critical coagulation concentration KW - Electrolytes KW - ZnO nanoparticle SP - 183 EP - 190 JF - The Science of the total environment JO - Sci. Total Environ. VL - 530-531 N2 - Nanoscale ZnO particles are receiving increasing attention because they are widely used in commercial products, but they do have potentially hazardous effects. The aggregation behavior of ZnO nanoparticles (NPs) in the environment contributes to the real risk assessment of nano-toxicity, and the real size of the nano-aggregates should be investigated. In this study, the influences of electrolytes on the stabilities of three ZnO NPs were compared: the commercial powder (NP1), the lab synthesized suspension (NP2) and the commercial suspension (NP3). The initial particle size of NP2 and NP3 in water was at a nanoscale whilst NP1 tended to form microscale aggregates. The capping reagents helped to retain their suspension. The stability of ZnO NPs depends on their zeta potential under specific pH value, ionic types and ionic strength. In general, neutralization plays a major role in aggregation. The effect of divalent counter-ions on ZnO NP aggregation was more than that of monovalent ones. The stabilities of NP2 and NP3 were confirmed by the large critical coagulation concentration (CCC) values of these particles. The experimental results also fit the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The aggregation of different ZnO NPs is relevant to their basic properties and is influenced by electrolytes, which decreases the possibility of the penetration of NPs into cells to cause toxicity in the environment. An understanding of the basic properties of NPs is crucial for assessing their fate in the environment as well as for setting up usage regulation and treatment strategy. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/26042532/The_effect_of_electrolytes_on_the_aggregation_kinetics_of_three_different_ZnO_nanoparticles_in_water_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(15)30119-4 DB - PRIME DP - Unbound Medicine ER -