Chemical Design of Hydrogels with Immobilized Laccase for the Reduction of Persistent Trace Compounds in Wastewater

2021 ◽  
Author(s):  
Christoph Horn ◽  
Doris Pospiech ◽  
Peter J. Allertz ◽  
Martin Müller ◽  
Katrin Salchert ◽  
...  
Keyword(s):  
Immobilized Laccase ◽  
Chemical Design ◽  
Trace Compounds

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.

scholarly journals Chemical design and characterization of cellulosic derivatives containing high-nitrogen functional groups: Towards the next generation of energetic biopolymers

2021 ◽  
Author(s):  
Ahmed Fouzi Tarchoun ◽  
Djalal Trache ◽  
Thomas M. Klapötke ◽  
Amir Abdelaziz ◽  
Mehdi Derradji ◽  
...  
Keyword(s):  
Functional Groups ◽  
Next Generation ◽  
High Nitrogen ◽  
Chemical Design

Rare earth permanent magnetic nanostructures: chemical design and microstructure control to optimize magnetic properties

2021 ◽  
Author(s):  
Junjie Xu ◽  
Kai Zhu ◽  
Song Gao ◽  
Yanglong Hou
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Exchange Coupling ◽  
Magnetic Nanostructures ◽  
Microstructure Control ◽  
Size And Shape ◽  
Chemical Design

The routes for the optimization of the magnetic properties of rare earth permanent magnetic nanostructures are discussed, i.e. the control of microstructure, such as size and shape as well as the exchange-coupling interactions.

Chemical design and synthesis of oxyanion and oxyfluoride cuprate superconductors

1994 ◽  
Vol 235-240 ◽  
pp. 158-161 ◽  
Author(s):  
C. Greaves ◽  
M. Al-Mamouri ◽  
P.R. Slater ◽  
P.P. Edwards
Keyword(s):  
Cuprate Superconductors ◽  
Design And Synthesis ◽  
Chemical Design

Chemical design of a radiolabeled gelatinase inhibitor peptide for the imaging of gelatinase activity in tumors

2007 ◽  
Vol 34 (5) ◽  
pp. 503-510 ◽  
Author(s):  
Hirofumi Hanaoka ◽  
Takahiro Mukai ◽  
Sayo Habashita ◽  
Daigo Asano ◽  
Kazuma Ogawa ◽  
...  
Keyword(s):  
Gelatinase Activity ◽  
Chemical Design ◽  
Inhibitor Peptide

ChemInform Abstract: Chemical Design of Highly Water-Soluble Ti, Nb, and Ta Precursors for Multi-Component Oxides.

ChemInform ◽  
2010 ◽  
Vol 31 (5) ◽  
pp. no-no
Author(s):  
Masato Kakihana ◽  
Judith Szanics ◽  
Masaru Tada
Keyword(s):  
Water Soluble ◽  
Chemical Design

Chemical Design of Magnetic Nanocomposites Based on Layered Double Hydroxides

2003 ◽  
Vol 5 (5/6) ◽  
pp. 455-464 ◽  
Author(s):  
A.V. Lukashin ◽  
A.A. Vertegel ◽  
A.A. Eliseev ◽  
M.P. Nikiforov ◽  
P. Gornert ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Magnetic Nanocomposites ◽  
Chemical Design ◽  
Double Hydroxides

Fuel-Composition Effects on High-Temperature Corrosion in Industrial/Commercial Boilers and Furnaces: A Review

1985 ◽  
Vol 107 (3) ◽  
pp. 744-757 ◽  
Author(s):  
J. Bellan ◽  
S. Elghobashi
Keyword(s):  
Metal Surfaces ◽  
Review Literature ◽  
Operating Conditions ◽  
Fuel Oil ◽  
Batch Distillation ◽  
Liquid Form ◽  
Combustion Gases ◽  
Initial Fuel ◽  
Trace Compounds ◽  
Ignition And Combustion

In this review, literature relevant to the problems of deposits and corrosion in industrial/commercial furnaces and boilers is analyzed, and the facts are synthesized into a picture that addresses corrosion problems expected with the use of unconventional fuels. Corrosion is found to depend greatly on the phenomena occurring during the combustion of fuel-oil sprays introduced into the furnace. In a first step, the drops that form the spray heat up and evaporate in a way that closely resembles a batch distillation process. Eventually, ignition and combustion occur with the subsequent change of the liquid fuel drops into carbonaceous, porous, sphere-like particles called cenospheres. In a second step, these cenospheres burn and the products of this combustion step determine the majority of the deposits on metal surfaces. This observation is very important since nonvolatile, non-combustible, corrosive trace compounds existing in the initial fuel-oil drop will have a much higher concentration in the cenosphere than in the original fuel. Accordingly, it is recommended that the theoretical and experimental study of oil spray combustion, cenosphere formation, and cenosphere combustion in a cloud of cenospheres receive a very high priority. Corrosion by gases is found to be unimportant. Deposits are found to be much more corrosive when in liquid form, although corrosion by solid deposits is by no means negligible. As a result, it is suggested in the study that corrosion on highly polished metal surfaces should be studied in order to evaluate the potential of this method of inhibiting deposition and thus hindering corrosion. Recent advances in the theory of deposition from combustion gases are also outlined in this study. The literature survey shows that the main corrosion-causing fuel constituents present in unconventional fuels are sulfur, alkali, vanadium, carbon and carbon monoxide, iron, and chloride. It is found that sometimes one of these compounds might act as a catalyst in corrosive reactions initiated by another compound, and therefore great care must be taken to identify the corrosion-causing compound in the deposits on metal surfaces. It is also found that in some cases a corrosive compound will inhibit the corrosive action of another corrosive compound. It is recommended that such situations be studied further so as to investigate the possibility of an optimum concentration of two such corrosive compounds that would minimize metal wastage. The problem of performing meaningful corrosion experiments is also addressed in this report and specific recommendations are made to achieve this goal. Finally, the effects of additives and the furnace operating conditions are discussed, and potential problems with both additives and new operating conditions are mentioned. The recommendations at the end of this study present a comprehensive set of areas to be investigated in order to better understand and be able to mitigate corrosion problems associated with unconventional fuels. High-priority experimental and theoretical studies are also outlined.

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