Effects of metal oxide nanoparticles (TiO2, Al2O3, SiO2 and ZnO) on waste activated sludge anaerobic digestion

2011 ◽  
Vol 102 (22) ◽  
pp. 10305-10311 ◽  
Author(s):  
Hui Mu ◽  
Yinguang Chen ◽  
Naidong Xiao
Keyword(s):  
Anaerobic Digestion ◽  
Metal Oxide ◽  
Activated Sludge ◽  
Metal Oxide Nanoparticles ◽  
Waste Activated Sludge ◽  
Oxide Nanoparticles

scholarly journals Long-term effect of metal oxide nanoparticles on activated sludge

2016 ◽  
Vol 75 (2) ◽  
pp. 462-473 ◽  
Author(s):  
Baranidharan Sundaram ◽  
Arun Kumar
Keyword(s):  
Metal Oxide ◽  
Activated Sludge ◽  
Metal Ion ◽  
Metal Oxide Nanoparticles ◽  
Oxygen Demand ◽  
Microscopic Analysis ◽  
Antagonistic Effect ◽  
Ion Concentration ◽  
Plant Performance ◽  
Oxide Nanoparticles

This study evaluated the influence of metal oxide nanoparticles (NPs) (Ag2O, TiO2) and their mixture on activated sludge for 180 days. When tested, a mixture of NPs at 1 and 10 mg/L had greater impact than individual NPs, in which maximum reduction in chemical oxygen demand (COD) elimination (76.3%) was observed after 150 days for 1 mg/L (500 mg/L COD concentration) and after 180 days (70.2%) for 10 mg/L (250 mg/L COD concentration). TiO2 had higher inhibition on COD reduction than Ag2O NPs at 1 and 10 mg/L. An antagonistic effect was observed in which the combination of individual NPs had a greater effect than a mixture of NPs. Reduction in COD elimination was found to be dependent on NP type and concentration (p < 0.05). Further, metal ion concentration was higher in sludge than supernatant irrespective of NPs, while microscopic analysis showed the presence of NPs inside activated sludge. Among NPs tested, the concentration of Ti4+ ion was greater in sludge than in the Ag+ ion, thus indicating that TiO2 has a greater affinity than Ag2O NPs. All three factors (NP type, NP concentration, organic concentration) play a significant role in imparting COD removal (p < 0.05). Future studies are required to quantify NP concentration to minimize NP effect on plant performance.

scholarly journals Influence of zinc oxide nanoparticles on anaerobic digestion of waste activated sludge and microbial communities

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5580-5589
Author(s):  
Shutao Wang ◽  
Lingbo Chen ◽  
Hao Yang ◽  
Zhisheng Liu
Keyword(s):  
Zinc Oxide ◽  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Microbial Communities ◽  
Zinc Oxide Nanoparticles ◽  
Waste Activated Sludge ◽  
Oxide Nanoparticles ◽  
Zno Nps

The influence of long-term exposure of zinc oxide nanoparticles (ZnO NPs) to waste activated sludge on anaerobic digestion and microbial communities was studied.

Star fruit extract-mediated green synthesis of metal oxide nanoparticles

2021 ◽  
pp. 1-8
Author(s):  
Sagadevan Suresh ◽  
Selvaraj Vennila ◽  
J. Anita Lett ◽  
Is Fatimah ◽  
Faruq Mohammad ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Green Synthesis ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Fruit Extract ◽  
Star Fruit

Quantum mechanics descriptors in a nano-QSAR model to predict metal oxide nanoparticles toxicity in human keratinous cells

2021 ◽  
Vol 23 (8) ◽  
Author(s):  
Eliecer Peláez Sifonte ◽  
Fidel Antonio Castro-Smirnov ◽  
Argenis Adrian Soutelo Jimenez ◽  
Héctor Raúl González Diez ◽  
Fernando Guzmán Martínez
Keyword(s):  
Quantum Mechanics ◽  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Qsar Model ◽  
Oxide Nanoparticles ◽  
Nanoparticles Toxicity
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