Aggregation and Deposition Kinetics of Polystyrene Microplastics and Nanoplastics in Aquatic Environment

2021 ◽  
Author(s):  
Ling Liu ◽  
Jian Song ◽  
Min Zhang ◽  
Wei Jiang
Keyword(s):  
Aquatic Environment ◽  
Deposition Kinetics ◽  
Kinetics Of

Supercritical Fluid Deposition of Ruthenium Thin Films: A Kinetic Study

2007 ◽  
Vol 992 ◽  
Author(s):  
Christos F. Karanikas ◽  
James J. Watkins
Keyword(s):  
Thin Films ◽  
Growth Rate ◽  
Deposition Temperature ◽  
Zero Order ◽  
Measurable Effect ◽  
Deposition Rates ◽  
Reaction Pressure ◽  
Deposition Kinetics ◽  
First Order ◽  
Kinetics Of

AbstractThe kinetics of the deposition of ruthenium thin films from the hydrogen assisted reduction of bis(2,2,6,6-tetramethyl-3,5-heptanedionato)(1,5-cyclooctadiene)ruthenium(II), [Ru(tmhd)2cod], in supercritical carbon dioxide was studied in order to develop a rate expression for the growth rate as well as to determine a mechanism for the process. The deposition temperature was varied from 240°C to 280°C and the apparent activation energy was 45.3 kJ/mol. Deposition rates up to 30 nm/min were attained. The deposition rate dependence on precursor concentrations between 0 and 0.2 wt. % was studied at 260°C with excess hydrogen and revealed first order deposition kinetics with respect to precursor at concentrations lower then 0.06 wt. % and zero order dependence at concentrations above 0.06 wt. %. The effect of reaction pressure on the growth rate was studied at a constant reaction temperature of 260°C and pressures between 159 bar to 200 bar and found to have no measurable effect on the growth rate.

The Influence of Temperature and Concentration on Copper Deposition Kinetics in Supercritical Carbon Dioxide

2004 ◽  
Vol 812 ◽  
Author(s):  
Yinfeng Zong ◽  
James J. Watkins
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Fluids ◽  
Zero Order ◽  
Copper Deposition ◽  
Deposition Kinetics ◽  
Zero Order Kinetics ◽  
Concentration Interval ◽  
Kinetics Of ◽  
Supercritical Carbon

AbstractThe kinetics of copper deposition by the hydrogen-assisted reduction of bis(2,2,7- trimethyloctane-3,5-dionato)copper in supercritical carbon dioxide was studied as a function of temperature and precursor concentration. The growth rate was found to be as high as 31.5 nm/min. Experiments between 220 °C and 270 °C indicated an apparent activation energy of 51.9 kJ/mol. The deposition kinetics were zero order with respect to precursor at 250 °C and 134 bar and precursor concentrations between 0.016 and 0.38 wt.% in CO2. Zero order kinetics over this large concentration interval likely contributes to the exceptional step coverage obtained from Cu depositions from supercritical fluids.

Study on deposition kinetics of high-K materials by X-ray fluorescence techniques

2004 ◽  
Vol 59 (8) ◽  
pp. 1183-1187 ◽  
Author(s):  
Caterina Carpanese ◽  
Barbara Crivelli ◽  
Massimo Caniatti
Keyword(s):  
X Ray ◽  
Deposition Kinetics ◽  
Fluorescence Techniques ◽  
High K ◽  
High K Materials ◽  
Kinetics Of

Aggregation kinetics of microplastics in aquatic environment: Complex roles of electrolytes, pH, and natural organic matter

2018 ◽  
Vol 237 ◽  
pp. 126-132 ◽  
Author(s):  
Shuocong Li ◽  
Hong Liu ◽  
Rui Gao ◽  
Abliz Abdurahman ◽  
Juan Dai ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Aquatic Environment ◽  
Aggregation Kinetics ◽  
Kinetics Of

Ion specific effects of monovalent cations on deposition kinetics of engineered nanoparticles onto the silica surface in aqueous media

2019 ◽  
Vol 6 (9) ◽  
pp. 2712-2723 ◽  
Author(s):  
Ruixing Huang ◽  
Chengxue Ma ◽  
Qiang He ◽  
Jun Ma ◽  
Zhengsong Wu ◽  
...  
Keyword(s):  
Silica Surface ◽  
Aqueous Media ◽  
Engineered Nanoparticles ◽  
Monovalent Cations ◽  
Hydration Degree ◽  
Deposition Kinetics ◽  
Specific Effects ◽  
Kinetics Of

The cations decreased the deposition kinetics of different charged NPs onto silica with the decrease in the hydration degree of additive cations.

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