ChemInform Abstract: Scandium Triflate-Catalyzed Strecker-Type Reactions of Aldehydes, Amines and Tributyltin Cyanide in Both Organic and Aqueous Solutions. Achievement of Complete Recovery of the Tin Compounds Toward Environmentally-Friendly Chemical Pro

ChemInform ◽  
2010 ◽  
Vol 29 (36) ◽  
pp. no-no
Author(s):  
S. KOBAYASHI ◽  
T. BUSUJIMA ◽  
S. NAGAYAMA
Keyword(s):  
Aqueous Solutions ◽  
Environmentally Friendly ◽  
Complete Recovery ◽  
Tin Compounds

Complete recovery of Eu from BaMgAl10O17:Eu2+ by alkaline fusion and its mechanism

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1113-1119 ◽  
Author(s):  
Shengen Zhang ◽  
Hu Liu ◽  
De'an Pan ◽  
Jianjun Tian ◽  
Yifan Liu ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Complete Recovery ◽  
Efficient Process ◽  
Alkaline Fusion

An environmentally friendly and efficient process for recycling waste phosphors has been developed.

Periodate Titration of Fe(II) in Acid Aqueous Solutions: An Environmentally Friendly Redox Reaction for the Undergraduate Laboratory

1997 ◽  
Vol 2 (4) ◽  
pp. 1-7 ◽  
Author(s):  
THOMAS G. DRUMMOND ◽  
WILLIAM L. LOCKHART ◽  
SPENCER J. SLATTERY ◽  
FAROOQ A. KHAN ◽  
ANDREW J. LEAVITT
Keyword(s):  
Aqueous Solutions ◽  
Redox Reaction ◽  
Environmentally Friendly ◽  
Undergraduate Laboratory

An environmentally friendly batch bioadsorption study of the radionuclides 67Ga from aqueous solutions by fibrous tea waste

2010 ◽  
Vol 165 (2) ◽  
pp. 563-572 ◽  
Author(s):  
Hayrettin Eroglu ◽  
Erhan Varoglu ◽  
Sinan Yapıcı ◽  
Ali Sahın
Keyword(s):  
Aqueous Solutions ◽  
Environmentally Friendly ◽  
Tea Waste

scholarly journals Development of Environmentally Friendly Cellulose Derivative-Based Hydrogels for Contact Lenses Using a Radiation Crosslinking Technique

2021 ◽  
Vol 11 (19) ◽  
pp. 9168
Author(s):  
Akihiro Hiroki ◽  
Mitsumasa Taguchi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aqueous Solutions ◽  
Contact Lenses ◽  
Value Added ◽  
Environmentally Friendly ◽  
Soft Contact ◽  
Elongation At Break ◽  
Soft Contact Lenses ◽  
Polyethylene Glycol 1000

Although they have potential environmental pollution issues, soft contact lenses are value-added biodevices for medical use. Thus, it is important to reconsider starting materials and production methods to achieve sustainable development. In this study, hydrogels composed of hydroxypropyl cellulose (HPC) as an environmentally friendly material were produced by radiation and investigated for use in disposable soft contact lenses. HPC-based hydrogels with good mechanical properties and transparency were prepared by irradiation of electron beams on highly concentrated aqueous solutions containing HPC, polyethylene glycol #1000 dimethacrylate (23G), and 2-hydroxyethyl methacrylate (HEMA). The addition of 23G to HPC aqueous solutions resulted in an increase in the gel fraction as well as improved mechanical properties, such as tensile strength and elongation at break. The tensile strength and the elongation at break of HPC/HEMA/23G hydrogel obtained by the further addition of HEMA with HPC/23G aqueous solutions exhibited 0.2 MPa and 124%, which were approximately 2.0 and 1.8 times larger than these of the pure HPC hydrogel, respectively. The evaluation of the properties of the HPC/HEMA/23G hydrogel demonstrated its potential as a soft contact material with improved mechanical properties.

Synthesis of copper oxide nanowires and nanoporous copper via environmentally friendly transformation of bulk copper–calcium alloys

2018 ◽  
Vol 54 (43) ◽  
pp. 5446-5449
Author(s):  
X. Zhang ◽  
K. Turcheniuk ◽  
B. Zusmann ◽  
J. Benson ◽  
S. Nelson ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Copper Oxide ◽  
Environmentally Friendly ◽  
Oxide Nanowires ◽  
Nanoporous Copper ◽  
One Step ◽  
Cu Nanostructures

In this work, we report a novel, one-step, inexpensive and environmentally friendly synthesis of Cu nanostructures by means of chemical de-alloying of bulk Cu–Ca alloys in aqueous solutions.

scholarly journals Green Synthesis of Silver Nanoparticles using Lantana camara Fresh Leaf Extract for Qualitative Detection of Hg2+, Cu2+, Pb2+, and Mn2+ in Aqueous Solution

2021 ◽  
Vol 21 (4) ◽  
pp. 990
Author(s):  
Henry Fonda Aritonang ◽  
Talita Kojong ◽  
Harry Koleangan ◽  
Audy Denny Wuntu
Keyword(s):  
Silver Nanoparticles ◽  
Aqueous Solutions ◽  
Colorimetric Method ◽  
Environmentally Friendly ◽  
Ethanol Extract ◽  
Lantana Camara ◽  
Colloidal Synthesis ◽  
Distilled Water ◽  
Average Size ◽  
Almost All

This research was focused on the discovery of new environmentally friendly sensors based on nanoscale materials whose main purpose was to detect the presence of heavy metals in aqueous solutions. The environmentally friendly extracellular biosynthetic technique was applied to produce silver nanoparticles (AgNps). The reducing agents used were distilled water and ethanol extract obtained from fresh leaves of Lantana camara. The silver-containing extracts (Ag-extract) were then used to detect the presence of Hg2+, Cu2+, Pb2+, and Mn2+ in aqueous solutions by the colorimetric method using UV-visible spectroscopy. The colloidal synthesis of AgNPs was then monitored by the same method. The spectrum obtained showed peaks between 430 and 450 nm according to the Plasmon absorbance of AgNP. AgNPs' size and shape were characterized using the Transmission Electron Microscopy (TEM) technique, which showed the average size varies from 1.6 to 25 nm. The colorimetric data showed that Ag-extract, both of distilled water or ethanol solvents, was the best for detecting the presence of Hg2+ followed by Mn2+. On the other hand, Ag-extract in distilled water cannot detect Cu2+, Pb2+, and Mn2+ ions, while almost all Ag-extracts in ethanol solvents could identify the presence of these metals.

Novel Route for Recovery of Glycerol from Aqueous Solutions by Reversible Reactions

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Vijaya lakshmi Ch ◽  
Udaybhaskar Ravuru ◽  
Viswanath Kotra ◽  
Satyavathi Bankupalli ◽  
Prasad R.B.N.
Keyword(s):  
Aqueous Solutions ◽  
Extraction Efficiency ◽  
Equilibrium Constants ◽  
Complete Recovery ◽  
Reactive Extraction ◽  
Maximum Efficiency ◽  
Reported Study ◽  
Acetalization Reaction ◽  
Hydrolysis Of ◽  
Acetone System

Glycerol in aqueous solutions was reacted with acetaldehyde and acetone to form glycerol acetals. The formed acetal was extracted using a solvent and the glycerol is recovered by hydrolysis of the extractant. The reaction equilibrium constants ranged from 1-35 for glycerol-acetaldehyde system and 2.2-5.5 for glycerol-acetone system, respectively. Phase equilibrium measurements showed that the distribution coefficient was from 1.5-8.5 for glycerol-acetaldehyde system and 2-6.5 for glycerol-acetone system. The extraction efficiency of the solvent increased with increase in temperature. Maximum efficiency achieved was 94% at the refluxing temperature of toluene. The reactive extraction route to obtain glycerol is more economical than the distillation route in pure form. The maximum conversion obtained during the acetalization reaction was 87% and the extraction efficiency achieved was 94%. The hydrolysis of the acetal recorded complete recovery of high purity glycerol. The reported study has an application for the recovery of pure glycerol from aqueous solutions generated during biodiesel processing.

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