A polyethersulfone composite ultrafiltration membrane with the in-situ generation of CdS nanoparticles for the effective removal of organic pollutants and photocatalytic self-cleaning

2021 ◽  
pp. 119715
Author(s):  
Lei Chen ◽  
Bo Yang ◽  
Peng Zhou ◽  
Tao Xu ◽  
Chao He ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Ultrafiltration Membrane ◽  
Cds Nanoparticles ◽  
Effective Removal ◽  
In Situ Generation ◽  
Self Cleaning

In Situ Electrochemical Generation of Reactive Chlorine Species for Efficient Ultrafiltration Membrane Self-Cleaning

2020 ◽  
Vol 54 (11) ◽  
pp. 6997-7007 ◽  
Author(s):  
Xiaoxiong Wang ◽  
Meng Sun ◽  
Yumeng Zhao ◽  
Chi Wang ◽  
Wen Ma ◽  
...  
Keyword(s):  
Ultrafiltration Membrane ◽  
Electrochemical Generation ◽  
Self Cleaning

In-situ generation of multi-homogeneous/heterogeneous Fe-based Fenton catalysts toward rapid degradation of organic pollutants at near neutral pH

Chemosphere ◽  
2020 ◽  
Vol 245 ◽  
pp. 125663 ◽  
Author(s):  
Xuqing Li ◽  
Bing Xiao ◽  
Meng Wu ◽  
Lin Wang ◽  
Rufen Chen ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Rapid Degradation ◽  
Neutral Ph ◽  
In Situ Generation

In-situ generation of hydrated nanoparticles on commercial stainless steel mesh for durable superhydrophilicity and self-cleaning

2018 ◽  
Vol 157 ◽  
pp. 284-293 ◽  
Author(s):  
Yang Liu ◽  
Xu Wang ◽  
Yichun Zhang ◽  
Cheng Zhang ◽  
Longbo Luo ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Stainless Steel Mesh ◽  
Steel Mesh ◽  
In Situ Generation ◽  
Self Cleaning

Highly diastereo- and enantioselective organocatalytic synthesis of trifluoromethylated erythritols based on the in situ generation of unstable trifluoroacetaldehyde

2021 ◽  
Author(s):  
Kazumasa Funabiki ◽  
Toshiya Gotoh ◽  
Ryunosuke Kani ◽  
Toshiyasu Inuzuka ◽  
Yasuhiro Kubota
Keyword(s):  
Trifluoromethyl Group ◽  
In Situ Generation

A highly diastereo- and enantioselective organocatalytic method to synthesise erythritols bearing a trifluoromethyl group has been investigated.

Clay liner materials for land disposal of hazardous non-metal wastes

1996 ◽  
Vol 33 (8) ◽  
pp. 71-77
Author(s):  
I. M.-C. Lo ◽  
H. M. Liljestrand ◽  
J. Khim ◽  
Y. Shimizu
Keyword(s):  
Sorption Capacity ◽  
Organic Anion ◽  
Surface Exchange ◽  
Clay Liner ◽  
Effective Removal ◽  
Exchange Constants ◽  
Anionic Species ◽  
Surface Ligand ◽  
Land Disposal

Simple land disposal systems for hazardous and mixed wastes contain heavy metal cationic species through precipitation and ion exchange mechanisms but typically fail by releasing soluble organic and inorganic anionic species. To enhance the removal of anions from leachate, clays are modified with coatings of iron or aluminium cations to bridge between the anionic surface and the anionic pollutants. A competitive surface ligand exchange model indicates that surface coatings of 10 meq cation/gm montmorillonite under typical leachate conditions increase the inorganic anion sorption capacity by at least a factor of 6 and increase the intrinsic surface exchange constants by more than a factor of 100. Similarly, metal hydroxide coatings on montmorillonite increase the organic anion sorption capacity by a factor of 9 and increase the intrinsic surface exchange constants by a factor of 20. For historical concentrations of non-metal anions in US hazardous and mixed waste leachate, sorption onto natural clay liner materials is dominated by arsenate sorption. With cation coatings, anion exchange provides an effective removal for arsenate, selenate, phenols, cresols, and phthalates. Engineering applications are presented for the use of modified clays as in situ barriers to leachate transport of anionic pollutants as well as for above ground treatment of recovered leachate.

Recent advances in Minisci-type reactions and applications in organic synthesis

2020 ◽  
Vol 24 ◽  
Author(s):  
Wengui Wang ◽  
Shoufeng Wang
Keyword(s):  
Free Radical ◽  
Hydrogen Atom ◽  
Organic Synthesis ◽  
Radical Reactivity ◽  
Atom Loss ◽  
Radical Generation ◽  
In Situ Generation ◽  
Thermal Cleavage ◽  
Synthetic Chemist

Abstract:: Minisci-type reactions have become widely known as reactions that involve the addition of carbon-centered radicals to basic heteroarenes followed by formal hydrogen atom loss. While the originally developed protocols for radical generation remain in active use today, in recent years by a new array of radical generation strategies allow use of a wider variety of radical precursors that often operate under milder and more benign conditions. New transformations based on free radical reactivity are now available to a synthetic chemist looking to utilize a Minisci-type reaction. Radical-generation methods based on photoredox catalysis and electrochemistry, which utilize thermal cleavage or the in situ generation of reactive radical precursors, have become popular approaches. Our review will cover the remarkably literature that has appeared on this topic in recent 5 years, from 2015-01 to 2020-01, in an attempt to provide guidance to the synthetic chemist, on both the challenges that have been overcome and applications in organic synthesis.

Self-powering/self-cleaning electronic-skin basing on PVDF/TiO 2 nanofibers for actively detecting body motion and degrading organic pollutants

2017 ◽  
Vol 416 ◽  
pp. 424-431 ◽  
Author(s):  
Chuanyi Dong ◽  
Yongming Fu ◽  
Weili Zang ◽  
Haoxuan He ◽  
Lili Xing ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Body Motion ◽  
Electronic Skin ◽  
Self Cleaning

In-situ chemical oxidation: peroxide or persulfate coupled with membrane technology for wastewater treatment

2021 ◽  
Author(s):  
Huchuan Yan ◽  
Cui Lai ◽  
Dongbo Wang ◽  
Shiyu Liu ◽  
Xiaopei Li ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Organic Pollutants ◽  
Health And Safety ◽  
Chemical Oxidation ◽  
Membrane Technology ◽  
In Situ Chemical Oxidation ◽  
Refractory Organic Pollutants

Refractory organic pollutants in wastewater have the characteristics of persistence and toxicity, which seriously threaten the health and safety of humans and other organisms. Many researchers have committed to developing...

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