Superpermeable nanoporous carbon-based catalytic membranes for electro-Fenton driven high-efficiency water treatment

2018 ◽  
Vol 6 (46) ◽  
pp. 23502-23512 ◽  
Author(s):  
Qi Zhang ◽  
Shuo Chen ◽  
Xie Quan ◽  
Yan Liu ◽  
Hongtao Yu ◽  
...  
Keyword(s):  
Water Treatment ◽  
Membrane Permeability ◽  
High Efficiency ◽  
Pore Radius ◽  
Nanoporous Carbon ◽  
Thin Membrane ◽  
Catalytic Membranes ◽  
Poiseuille Equation ◽  
Effective Pore Radius ◽  
Carbon Based

Based on the Hagen–Poiseuille equation, theoretical membrane permeability is inversely and directly proportional to its thickness and pore-radius, respectively, indicating that a thin membrane with an effective pore-radius is extremely permeable.

Efficient Production of Biodiesel Catalyzed by Acidic Nanoporous Carbon Materials：A Review

2020 ◽  
Vol 16 ◽  
Author(s):  
Anping Wang ◽  
Heng Zhang ◽  
Hu Li ◽  
Song Yang
Keyword(s):  
Pore Structure ◽  
Active Sites ◽  
Catalytic Performance ◽  
Nanoporous Carbon ◽  
Biodiesel Production ◽  
Efficient Production ◽  
Fossil Energy ◽  
Catalytic Materials ◽  
High Acid ◽  
Carbon Based

Background: With the gradual decrease of fossil energy, the development of alternatives to fossil energy has attracted more and more attention. Biodiesel is considered to be the most potent alternative to fossil energy, mainly due to its green, renewable and biodegradable advantages. The stable, efficient and reusable catalysts are undoubtedly the most critical in the preparation of biodiesel. Among them, nanoporous carbon-based acidic materials are very important biodiesel catalysts. Objective: The latest advances of acidic nanoporous carbon catalysts in biodiesel production was reviewed. Methods: Biodiesel is mainly synthesized by esterification and transesterification. Due to the important role of nanoporous carbon-based acidic materials in the catalytic preparation of biodiesel, we focused on the synthesis, physical and chemical properties, catalytic performance and reusability. Results: Acidic catalytic materials have a good catalytic performance for high acid value feedstocks. However, the preparation of biodiesel with acid catalyst requires relatively strict reaction conditions. The application of nanoporous acidic carbon-based materials, due to the support of carbon-based framework, makes the catalyst have good stability and unique pore structure, accelerates the reaction mass transfer speed and accelerates the reaction. Conclusion: Nanoporous carbon-based acidic catalysts have the advantages of suitable pore structure, high active sites, and high stability. In order to make these catalytic processes more efficient, environmentally friendly and low cost, it is an important research direction for the future biodiesel catalysts to develop new catalytic materials with high specific surface area, suitable pore size, high acid density, and excellent performance.

scholarly journals Recent Advances of Photocatalytic Application in Water Treatment: A Review

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1804
Author(s):  
Guangmin Ren ◽  
Hongtao Han ◽  
Yixuan Wang ◽  
Sitong Liu ◽  
Jianyong Zhao ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
High Efficiency ◽  
Low Cost ◽  
Great Promise ◽  
Rapid Progress ◽  
Recent Advances ◽  
Photocatalytic Application ◽  
Oxidation Technology ◽  
Performance Challenges

Photocatalysis holds great promise as an efficient and sustainable oxidation technology for application in wastewater treatment. Rapid progress developing novel materials has propelled photocatalysis to the forefront of sustainable wastewater treatments. This review presents the latest progress on applications of photocatalytic wastewater treatment. Our focus is on strategies for improving performance. Challenges and outlooks in this promising field are also discussed. We hope this review will help researchers design low-cost and high-efficiency photocatalysts for water treatment.

scholarly journals Evaluation of an environmentally sustainable UV-assisted water treatment system for the removal of Bacillus globigii spores in water

2017 ◽  
Vol 18 (3) ◽  
pp. 968-975
Author(s):  
R. G. Silva ◽  
J. Szabo ◽  
V. Namboodiri ◽  
E. R. Krishnan ◽  
J. Rodriguez ◽  
...  
Keyword(s):  
Water Treatment ◽  
High Efficiency ◽  
Membrane Filter ◽  
Water Security ◽  
Disinfection Byproducts ◽  
Treatment System ◽  
Health Concern ◽  
Environmentally Sustainable ◽  
Inorganic Substances ◽  
The Impact

Abstract Development of greener water treatment technologies is important for the production of safe drinking water and water security applications, such as decontamination. Chlorine assisted disinfection is common and economical, but can generate disinfection byproducts (DBPs) that may be of health concern. DBPs are formed due to the reaction of chlorine with naturally occurring organic and inorganic substances in water. Currently, various innovative technologies are being developed as alternative approaches for preventing DBPs during water treatment. In this study, we evaluated the effectiveness of a novel combination of high efficiency flow filtration and UV disinfection treatment system for the removal of Bacillus globigii (B. globigii) spores in water. The filtration system consists of a charged membrane filter (CMF) that not only helps to remove suspended particles but also reduces the impact of other impurities including bio organisms. In order to get most performance details, the CMF was evaluated at clean, half-life, and end of life (EOL) conditions along with 100% UV transmittance (UVT). In addition, the effectiveness of the UV system was evaluated as a stand alone system at 100% and 70% EOL intensity. The study was conducted at the US EPA's Test and Evaluation (T&E) Facility in Cincinnati, OH, using B. globigii, a surrogate for B. anthracis spores. This non-chemical environmentally-friendly CMF/UV combination system and the stand alone UV unit showed greater than 6.0 log removal of B. globigii during the tests.

scholarly journals The effective pore radius of screen wicks.

1990 ◽  
Vol 56 (521) ◽  
pp. 168-174 ◽  
Author(s):  
Hiroaki KOZAI ◽  
Hideaki IMURA ◽  
Yuji IKEDA
Keyword(s):  
Pore Radius ◽  
Effective Pore Radius

High efficiency LaOCl supported Fe-Fe3C-based catalyst for hydrogenation of nitroarenes fabricated by coordination-assisted-pyrolysis

2021 ◽  
Author(s):  
Xuewei Li ◽  
Wei She ◽  
Jing Wang ◽  
Weizuo Li ◽  
Guangming Li
Keyword(s):  
High Efficiency ◽  
Metal Organic Frameworks ◽  
Efficient Catalyst ◽  
Considerable Potential ◽  
Highly Efficient ◽  
Hydrogenation Reactions ◽  
Metal Organic ◽  
Carbon Based

Bi-metal organic frameworks (Bi-MOFs) derived carbon-based catalysts have exhibited the considerable potential for hydrogenation reactions. However, designing a suitable bi-MOF to fabricate the highly efficient catalyst is still great challenge....

Desalinization Water Treatment Control System Design Based on Mitsubishi PLC

2013 ◽  
Vol 397-400 ◽  
pp. 1539-1542
Author(s):  
Ling Yu ◽  
Jian Rong Ning ◽  
Xiang Li
Keyword(s):  
Water Treatment ◽  
High Efficiency ◽  
Control System Design ◽  
Treatment Control ◽  
Safety Control ◽  
Machine Interface ◽  
Water Pumps ◽  
Automatic Switching ◽  
Day By Day ◽  
Switching State

With the development of industry and technology, the need for freshwater increases day by day, the contradiction between the fresh water for production and livelihood is sharpened. An important way to solve the problem is desalinization of the groundwater. In this paper reverse osmosis disposal process of groundwater are used, PLC are used to control electromagnetic valves and water pumps in the desalinization water treatment system and automatic switching state or stop. Using touching screen as man-machine interface, which is more convenient for the operator to know the working stages, and is more facility for desalinization process. The system has many advantages, such a saving energy, high efficiency, more safety, control modes flexible and various, function extension easily. It has great significance in reduce cost of desalinization of groundwater and remission serious lack of the freshwater in some areas of China.

Enantioselective Nanoporous Carbon Based on Chiral Ionic Liquids

2015 ◽  
Vol 55 (1) ◽  
pp. 408-412 ◽  
Author(s):  
Ido Fuchs ◽  
Nina Fechler ◽  
Markus Antonietti ◽  
Yitzhak Mastai
Keyword(s):  
Ionic Liquids ◽  
Nanoporous Carbon ◽  
Chiral Ionic Liquids ◽  
Carbon Based
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