Enhancing the hydrophilicity and biofoulant removal ability of a PVDF ultrafiltration membrane via π-π interactions as measured by AFM

2022 ◽  
Vol 641 ◽  
pp. 119874
Author(s):  
Yi-Chen Lin ◽  
Kuan-Miao Liu ◽  
Pei-Ling Chiu ◽  
Chi-Min Chao ◽  
Chi-Sheng Wen ◽  
...  
Keyword(s):  
Ultrafiltration Membrane ◽  
Π Interactions

Preparation of La-doped TiO$lt;inf$gt;2$lt;/inf$gt; Ultrafiltration Membrane by Templating of Block Copolymer

2015 ◽  
Vol 30 (2) ◽  
pp. 171 ◽  
Author(s):  
CHEN Tao-Tao ◽  
LI Dan ◽  
JING Wen-Heng ◽  
FAN Yi-Qun ◽  
XING Wei-Hong
Keyword(s):  
Block Copolymer ◽  
Ultrafiltration Membrane ◽  
La Doped

Characteristics of fouling due to clay-organic substances in potable water treatment by ultrafiltration

1996 ◽  
Vol 34 (9) ◽  
pp. 157-164 ◽  
Author(s):  
Kim C.-H. ◽  
M. Hosomi ◽  
A. Murakami ◽  
M. Okada
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Humic Acid ◽  
Fulvic Acid ◽  
Size Distribution ◽  
Ultrafiltration Membrane ◽  
Organic Substances ◽  
Decomposition Products ◽  
Microbial Decomposition ◽  
Fouling Materials

Effects of clay on fouling due to organic substances and clay were evaluated by model fouling materials and kaolin. Model fouling materials selected were protein, polysaccharide, fulvic acid, humic acid and algogenic matter (EOM:ectracellular organic matter, microbial decomposition products) and kaolin was selected as the clay material. Polysulfone membrane (MWCO(Molecular Weight Cut-Off) 10,000, 50,000 and 200,000) was used as an ultrafiltration membrane. In particular, the flux measurement of solutions containing algogenic matter used an ultrafiltration membrane of MWCO 50,000. The flux of protein and polysaccharide with coexistence of kaolin increased in the case of the ratio of MW/MWCO being greater than one, but did not increase in the case of the MW/MWCO ratio being below one. In contrast, the flux of fulvic acid and humic acid with coextence of kaolin decreased regardless of the ratio of MW/MWCO. The addition of dispersion agent and coagulant in the organic substances and kaolin mixture solution changed the size distribution of kaolin, and resulted in a change of the flux. EOM and microbial decomposition products decreased with the increase of the fraction of organic matter having molecular weight more than MWCO of membrane. The flux of the algogenic organic matter with coexistence of kaolin decreased with the increase of the amount of kaolin. It was suggested that the decline of the flux with coexistence of kaolin was due to the change of the resistance of the kaolin cake layer corresponding to the change in kaolin size distribution with charge.

Biological sulfate removal in an acidogenic bioreactor with an ultrafiltration membrane system

1998 ◽  
Vol 38 (4-5) ◽  
pp. 513-520 ◽  
Author(s):  
O. Mizuno ◽  
H. Takagi ◽  
T. Noike
Keyword(s):  
Sulfate Reduction ◽  
Membrane Filtration ◽  
Membrane Bioreactor ◽  
Volatile Fatty Acids ◽  
Membrane System ◽  
Organic Substrate ◽  
Ultrafiltration Membrane ◽  
Sulfate Concentration ◽  
Sulfate Removal ◽  
Chemostat Reactor

The biological sulfate removal in the acidogenic bioreactor with an ultrafiltration membrane system was investigated at 35°C. Sucrose was used as the sole organic substrate. The sulfate concentration in the substrate ranged from 0 to 600mgS·1−1. The chemostat reactor was operated to compare with the membrane bioreactor. The fouling phenomenon caused by FeS precipitate was observed at higher concentration of sulfate. However, it was possible to continuously operate the membrane bioreactor by cleaning the membrane. The efficiency of sulfate removal by sulfate reduction reached about 100% in the membrane bioreactor, and 55 to 87% of sulfide was removed from the permeate by the membrane filtration. The composition of the metabolite was remarkably changed by the change in sulfate concentration. When the sulfate concentration increased, acetate and 2-proponol significantly increased while n-butyrate and 3-pentanol decreased. The sulfate-reducing bacteria play the role as acetogenic bacteria consuming volatile fatty acids and alcohols as electron donors under sulfate-rich conditions. The results show that the acidogenesis and sulfate reduction simultaneously proceed in the membrane bioreactor.

P–Ge/Sn π Interactions Versus Arene···Ge/Sn Contacts for the Stabilization of Diphosphatetrylenes, (R2P)2E (E = Ge, Sn)

2019 ◽  
Vol 59 (1) ◽  
pp. 863-874 ◽  
Author(s):  
Keith Izod ◽  
Peter Evans ◽  
Paul G. Waddell
Keyword(s):  
Π Interactions

Polyethersulfone ultrafiltration membrane incorporated with ferric-based metal-organic framework for textile wastewater treatment

2021 ◽  
Vol 270 ◽  
pp. 118819
Author(s):  
Nur Azizah Johari ◽  
Norhaniza Yusof ◽  
Woei Jye Lau ◽  
Norfadhilatuladha Abdullah ◽  
Wan Norharyati Wan Salleh ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Metal Organic Framework ◽  
Textile Wastewater ◽  
Ultrafiltration Membrane ◽  
Metal Organic ◽  
Textile Wastewater Treatment ◽  
Organic Framework
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