Sub-micro photocatalytic TiO2 particles for a water depollution: comparable removal efficiency to commercial P25 and easy separation via a simple sedimentation

2021 ◽  
Author(s):  
Woori Ko ◽  
Byeong Jun Cha ◽  
Young Dok Kim ◽  
Hyun Ook Seo
Keyword(s):  
Removal Efficiency ◽  
Tio2 Particles ◽  
Photocatalytic Tio2 ◽  
Water Depollution

scholarly journals Photocatalytic TiO2 particles confer superior antibacterial effects in a nutrition-rich environment: an in vitro study

2010 ◽  
Vol 31 (2) ◽  
pp. 151-154 ◽  
Author(s):  
Takeshi Hiura ◽  
Hironobu Koseki ◽  
Koutaro Shiraishi ◽  
Tomohiko Asahara ◽  
Toshiyuki Tsurumoto ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Antibacterial Effects ◽  
Tio2 Particles ◽  
Photocatalytic Tio2

scholarly journals Decoration of photocatalytic TiO2 particles by cobalt clusters

2020 ◽  
Vol 16 (3) ◽  
pp. 336-347
Author(s):  
M. Nadareishvili ◽  
G, Mamniashvili ◽  
T. Gegechkori ◽  
S. Gogichaishvili ◽  
T. Zedginidze ◽  
...  
Keyword(s):  
Cobalt Clusters ◽  
Tio2 Particles ◽  
Photocatalytic Tio2

scholarly journals Photocatalytic TiO2 Embedded on PET-g-PAAc Fabric by Sono-gamma Irradiation Technique

2019 ◽  
Vol 32 (2) ◽  
pp. 349-353
Author(s):  
Sheikha A. Alkhursani ◽  
Mohamed Madani ◽  
Mohamed Mohamady Ghobashy
Keyword(s):  
Gamma Irradiation ◽  
Toluidine Blue ◽  
Degradation Process ◽  
Tio2 Particle ◽  
Attenuated Total Reflection ◽  
Ambient Conditions ◽  
Sem Images ◽  
Pet Fabric ◽  
Tio2 Particles ◽  
Photocatalytic Tio2

Fabrication of photocatalytic TiO2 particles onto PET-g-PAAc fabric has been succeeded by ultrasonic-gamma irradiation methods. Ultrasonic irradiation assisted for good distribution of TiO2 particles onto the surface of PET fabric in a uniform manner at ambient conditions. The product modify PET fabric was characterized by attenuated total reflection-Fourier transform infrared (ATR-FTIR) confirmed the grafting of COOH groups onto PET fabric. SEM images revealed a good dispersed and adherent obtained TiO2 particle onto PET fabric. Results obtained from X-ray diffraction indicating TiO2 (Degussa P25) in the anatase and rutile phases. The degradation process of three different dyes remazol red, amido black and toluidine blue from aqueous solutions by TiO2@PET-g-PAAc was investigated using modified photo reactor. It was found that decoluorization of toluidine blue was 99 % after 60 min. The reused of TiO2@PET-g-PAAc showed that the activity of TiO2@PET-g-PAAc for degradation still remained good which conclude that PET fabric makes TiO2 easily recovered, which overcomes the disadvantage of separation difficulty of common catalyst after or through degradation processing.

Treatment Performance of Photocatalysis/H2O2/Metal Membrane Process for Organics Removal

2008 ◽  
Vol 569 ◽  
pp. 5-8 ◽  
Author(s):  
Jong Tae Jung ◽  
Jong Oh Kim ◽  
Won Youl Choi
Keyword(s):  
Hydrogen Peroxide ◽  
Humic Acid ◽  
Pore Size ◽  
Removal Efficiency ◽  
Membrane Surface ◽  
Membrane System ◽  
Oh Radicals ◽  
Metal Membrane ◽  
Tio2 Particles ◽  
Organics Removal

The objective of this study is to evaluate the performance of photocatalysis/hydrogen peroxide/metal membrane system. Metal membrane for the separation of TiO2 particles was used in an experiment and nominal pore size is 0.5 μm. Hydrogen peroxide was tested as oxidants. The removal efficiency of CODCr and color for initial hydrogen peroxide concentration increases rapidly with an increase in the hydrogen peroxide concentration up to 50 mg/L. The removal efficiency of of CODCr and color for 50 mg/L of initial hydrogen peroxide concentration was about 95 % and 98 %, respectively. However, the addition of hydrogen peroxide over 50 mg/L inhibits the system efficiency. The addition of hydrogen peroxide in UV/TiO2 system enhanced removal efficiency of CODCr and color compared to no addition of hydrogen peroxide. This may be ascribed to capture the electrons ejected from TiO2 and to produce OH radicals. The application of metal membrane in UV/ TiO2/H2O2 system enhanced removal efficiency of CODCr and color due to the adsorption of metal membrane surface as well as the production of OH radical. In application of metal membrane with nominal pore size 0.5 μm, TiO2 particles were effectively separated from the treated water by metal membrane rejection. Photocatalytic metal membrane was much smaller resistance than these of humic acid, TiO2 and humic acid/ TiO2 due to humic acid degradation of photocatalytic reaction.

Degradation of 2,4-dichlorophenol by melamine amine celluloseimmobilized lacasses

TAPPI Journal ◽  
2017 ◽  
Vol 16 (10) ◽  
pp. 559-564 ◽  
Author(s):  
ZHEN WANG ◽  
PINGPING BIN ◽  
YING LIU ◽  
YU LIU ◽  
GUIHUA YANG ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Removal Efficiency ◽  
Immobilized Laccase ◽  
Dialdehyde Cellulose

Epoxidized dialdehyde cellulose (EDC) was prepared and grafted with melamine to obtain melamine grafted epoxidized dialdehyde cellulose (EDC-melamine); the products were characterized by various methods and were used as carriers to immobilize laccase. Results show EDC-melamine can immobilize laccase effectively and have higher enzymatic activity compared with EDC. Furthermore, the enzymatic activity of EDC-melamine was found to be as high as 865 U•mg-1, compared with 140U•mg-1 for EDC. The removal efficiency of 2,4-dichlorophenol (2,4-DCP) for EDC-melamine immobilized laccase was about 71.5% at 40°C for 4 h at 10.0 mg•L-1 and dosage of laccase = 0.2 g/L. The removal efficiency can remain greater than 63%, even after six cycles.

The assessment of particulate matter (PM2.5) removal efficiency on air cleaner products through full scale test in Korea

2019 ◽  
Vol 18 (1) ◽  
pp. 76-80 ◽  
Author(s):  
Kichul Kim ◽  
Pil-Ju Park ◽  
Soomi Eo ◽  
Seungmi Kwon ◽  
Kwangrae Kim ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Removal Efficiency ◽  
Full Scale ◽  
Full Scale Test ◽  
Air Cleaner ◽  
Scale Test

Bioadsorption of Multiple Heavy Metal Ions by Rhizophora Apiculate sp. and Elaesis Guineensis sp.

2017 ◽  
Vol 14 (1) ◽  
pp. 15
Author(s):  
M.B. Nicodemus Ujih ◽  
Mohammad Isa Mohamadin ◽  
Milla-Armila Asli ◽  
Bebe Norlita Mohammed
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Living Organism ◽  
Heavy Metal Concentration ◽  
Industrial Area ◽  
Electrochemical Treatment ◽  
Chemical Oxidation

Heavy metal ions contamination has become more serious which is caused by the releasing of toxic water from industrial area and landfill that are very harmful to all living organism especially human and can even cause death if contaminated in small amount of heavy metal concentration. Currently, peoples are using classic method namely electrochemical treatment, chemical oxidation/reduction, chemical precipitation and reverse osmosis to eliminate the metal ions from toxic water. Unfortunately, these methods are costly and not environmentally friendly as compared to bioadsorption method, where agricultural waste is used as biosorbent to remove heavy metals. Two types of agricultural waste used in this research namely oil palm mesocarp fiber (Elaesis guineensis sp.) (OPMF) and mangrove bark (Rhizophora apiculate sp.) (MB) biomass. Through chemical treatment, the removal efficiency was found to improve. The removal efficiency is examined based on four specification namely dosage, of biosorbent to adsorb four types of metals ion explicitly nickel, lead, copper, and chromium. The research has found that the removal efficiency of MB was lower than OPMF; whereas, the multiple metals ions removal efficiency decreased in the order of Pb2+ > Cu2+ > Ni2+ > Cr2+.

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