Aggregation and Dissolution of 4 nm ZnO Nanoparticles in Aqueous Environments: Influence of pH, Ionic Strength, Size, and Adsorption of Humic Acid

Langmuir ◽  
2011 ◽  
Vol 27 (10) ◽  
pp. 6059-6068 ◽  
Author(s):  
Shao-Wei Bian ◽  
Imali A. Mudunkotuwa ◽  
Thilini Rupasinghe ◽  
Vicki H. Grassian
Keyword(s):  
Humic Acid ◽  
Ionic Strength ◽  
Zno Nanoparticles ◽  
Aqueous Environments ◽  
Influence Of Ph

Behavior of ZnO Nanoparticles in Aqueous Environments: Influence of pH and Adsorption of Humic Acid

2013 ◽  
Vol 832 ◽  
pp. 728-733 ◽  
Author(s):  
Mohd Omar Fatehah ◽  
Hamidi Abdul Aziz ◽  
Serge Stoll
Keyword(s):  
Humic Acid ◽  
Zno Nanoparticles ◽  
Metal Oxide Nanoparticles ◽  
Aggregate Size ◽  
Low Concentrations ◽  
Aqueous Environments ◽  
Anionic Charge ◽  
Aggregation And Disaggregation ◽  
Average Size ◽  
Influence Of Ph

The surface charge and average size of ZnO was studied with a function of pH and time. The interactions between ZnO and Suwannee River humic acid (SRHA) were further investigated under a range of environmentally relevant conditions with the pHPZC as a point of reference. The anionic charge carried by aquatic humic substances plays a major part in the aggregation and disaggregation of metal oxide nanoparticles. At low concentrations of SRHA (<0.05 mg="" l="" the="" positively="" charged="" zno="" aggregates="" were="" rapidly="" adsorbed="" below="" ph="" sub="">PZC. With similar SRHA concentrations, at pH=pHPZC, SRHA was able to control the suspension behavior of the ZnO and promoted partial disaggregation in small volumes. This was more distinguishable as SRHA form a surface coating on the nanoparticles and enhances stability via electrostatic stabilization mechanism which induces the disaggregation behavior in the ZnO nanoparticles and hence, decreases the aggregate size.

Influence of pH, soil humic acid, ionic strength and temperature on sorption of U(VI) onto attapulgite

2018 ◽  
Vol 316 (3) ◽  
pp. 981-991 ◽  
Author(s):  
Liqiang Tan ◽  
Xiaoli Tan ◽  
Xuemei Ren ◽  
Huiyang Mei ◽  
Xiangke Wang
Keyword(s):  
Humic Acid ◽  
Ionic Strength ◽  
Soil Humic Acid ◽  
Influence Of Ph

Sedimentation of TiO2nanoparticles in aqueous solutions: influence of pH, ionic strength, and adsorption of humic acid

2015 ◽  
Vol 57 (40) ◽  
pp. 18817-18824 ◽  
Author(s):  
Jing Lu ◽  
Dongmei Liu ◽  
Xiaonan Yang ◽  
Haixing Liu ◽  
Shiguang Liu ◽  
...  
Keyword(s):  
Humic Acid ◽  
Ionic Strength ◽  
Aqueous Solutions ◽  
Influence Of Ph

Aggregation and dissolution of ZnO nanoparticles synthesized by different methods: Influence of ionic strength and humic acid

2014 ◽  
Vol 451 ◽  
pp. 7-15 ◽  
Author(s):  
Yosep Han ◽  
Donghyun Kim ◽  
Gukhwa Hwang ◽  
Byoungcheun Lee ◽  
Igchun Eom ◽  
...  
Keyword(s):  
Humic Acid ◽  
Ionic Strength ◽  
Zno Nanoparticles
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