Coagulation and Dissolution of Zinc Oxide Nanoparticles in the Presence of Humic Acid Under Different pH Values

2016 ◽  
Vol 33 (5) ◽  
pp. 347-353 ◽  
Author(s):  
Ya-nan Dong ◽  
Xiang Li ◽  
Yuxiong Huang ◽  
Hongtao Wang ◽  
Fengting Li
Keyword(s):  
Zinc Oxide ◽  
Humic Acid ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Ph Values

scholarly journals Behaviour of titanium dioxide and zinc oxide nanoparticles in the presence of wastewater-derived organic matter and implications for algal toxicity

2015 ◽  
Vol 2 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Peta A. Neale ◽  
Åsa K. Jämting ◽  
Elissa O'Malley ◽  
Jan Herrmann ◽  
Beate I. Escher
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Organic Matter ◽  
Humic Acid ◽  
Zinc Oxide Nanoparticles ◽  
Wastewater Effluent ◽  
Oxide Nanoparticles ◽  
Zno Nanomaterials ◽  
Algal Toxicity

This study compared the behaviour and effect of TiO2 and ZnO nanomaterials in wastewater effluent, humic acid and test media.

scholarly journals Effects of humic acid on the interactions between zinc oxide nanoparticles and bacterial biofilms

2017 ◽  
Vol 231 ◽  
pp. 1104-1111 ◽  
Author(s):  
Kai Ouyang ◽  
Xiao-Ying Yu ◽  
Yunlin Zhu ◽  
Chunhui Gao ◽  
Qiaoyun Huang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Humic Acid ◽  
Zinc Oxide Nanoparticles ◽  
Bacterial Biofilms ◽  
Oxide Nanoparticles

scholarly journals Synthesis and properties of composite materials based on zinc oxide nanoparticles in an insulating matrix

Doklady BGUIR ◽  
2020 ◽  
Vol 18 (6) ◽  
pp. 25-32
Author(s):  
S. Y. Karankova ◽  
I. A. Tikhonov ◽  
E. B. Chubenko
Keyword(s):  
Zinc Oxide ◽  
Composite Material ◽  
Composite Materials ◽  
Sodium Silicate ◽  
Relative Intensity ◽  
Silicon Substrate ◽  
Zinc Oxide Nanoparticles ◽  
Initial Solution ◽  
Oxide Nanoparticles ◽  
Ph Values

A composite material based on zinc oxide nanoparticles synthesized by the chemical hydrothermal method and a polymer insulated matrix of sodium silicate was obtained. Free zinc oxide nanoparticles were formed by heating an equimolar solution of zinc nitrate and hexamethylenetetramine with different pH values (3–5). Nanoparticles were introduced into an aqueous sodium silicate solution and applied on a silicon substrate by centrifugation. Using scanning electron microscopy, we studied the structure and morphology of zinc oxide nanoparticles on a silicon substrate in unbound state and after their introduction into the sodium silicate matrix. It was found that the obtained particles have a hexagonal crystal lattice and a bimodal size distribution. After introduction in the matrix of sodium silicate, only smaller zinc oxide nanoparticles with an average diameter of 45 nm remain in it. Studying of the photoluminesclence spectra of a composite material, including zinc oxide nanoparticles obtained at different pH values of the initial solution, showed the presence of exciton and defectrelated photoluminescence bands with intensity’s maximums located at 383 and 590 nm, respectively. Zinc oxide nanoparticles in the stabilizing matrix of sodium silicate exhibit a higher relative intensity of exciton photoluminescence than unbound particles. The highest value of the relative intensity of exciton photoluminescence was achieved for a composite material including zinc oxide nanoparticles synthesized at pH=3,35 of the initial solution. The resulting composite materials can be used in optoelectronic and photovoltaic devices, and as an optical medium of non-cavity lasers.

Preparation and Characterization of Polyethersulfone Membrane Containing Zinc Oxide Nanoparticles and Polyvinylpyrrolidone

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
A. A. Abdulkarim ◽  
A. L. Ahmad ◽  
S. Ismail ◽  
B. S. Ooi
Keyword(s):  
Zinc Oxide ◽  
Humic Acid ◽  
Zinc Oxide Nanoparticles ◽  
Pure Water ◽  
Water Flux ◽  
Oxide Nanoparticles ◽  
Polyethersulfone Membrane ◽  
Pure Water Flux ◽  
Pes Membrane

Flat sheet polyethersulfone (PES) ultrafiltration membranes were fabricated by a dry/wet induced phase inversion process. Various ranges of ZnO concentrations (from 0 –5 wt. %) were utilized in conjunction with 16.5 and 2.5 wt. % of polyethersulfone and polyvinylpyrrolidone (PVP), respectively. The prepared membranes were characterized using scanning electron microscope (SEM), contact angle (CA), and flux/rejection performance. The modified membranes were tested on humic acid removal. The hydrophilicity of PES membrane was improved after addition of zinc oxide nanoparticles in the casting solution. Highest pure water flux was obtained at 5 wt.% ZnO nanoparticles. The modified membranes with 2.5 wt. % of zinc oxide exhibited higher humic acid flux and rejection.

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