scholarly journals Citric Acid Enhanced Copper Removal by a Novel Multi-amines Decorated Resin

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Chen Ling ◽  
Fuqiang Liu ◽  
Zhiguo Pei ◽  
Xiaopeng Zhang ◽  
Mengmeng Wei ◽  
...  
Keyword(s):  
Citric Acid ◽  
Copper Removal

Citric Acid Functionalizing Wheat Straw as Sorbent for Copper Removal from Aqueous Solution

2008 ◽  
Vol 54 (2) ◽  
pp. 174-178 ◽  
Author(s):  
Renmin Gong ◽  
Rui Guan ◽  
Jiajing Zhao ◽  
Xingyan Liu ◽  
Shoujun Ni
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Wheat Straw ◽  
Copper Removal

Comparison of Glycine and Citric Acid as Complexing Agents in Copper Chemical-Mechanical Polishing Slurries

2003 ◽  
Vol 767 ◽  
Author(s):  
Venkata Gorantla ◽  
S.V. Babu
Keyword(s):  
Citric Acid ◽  
Low Ph ◽  
Copper Removal ◽  
Complexing Agents ◽  
Alkaline Ph ◽  
Removal Rates ◽  
Copper Dissolution ◽  
Ph Values ◽  
Alkaline Conditions

AbstractTwo complexing agents, glycine and citric acid, in hydrogen peroxide based slurries for planarizing copper have been compared. Copper dissolution and polish rates and in situ electrochemical experimental results at various slurry pH values and hydroxyl radical concentrations at pH=8.4 are presented. It was observed that the pH of the slurry has a strong influence on copper dissolution and polish rates. While high copper removal rates were observed with citric acid-peroxide solutions at low pH values, glycineperoxide system yielded high Cu removal rates at alkaline pH values. Copper dissolution rates in both the systems at pH 4 and 8 were consistent with the electrochemical measurements. The concentration of hydroxyl radicals generated in citric acid-peroxide system was less than that of those generated in glycine peroxide system at pH=8.4 indicating low copper removal rates at alkaline conditions in the former system.

Magnetic Citric Acid-Modified Cellulose for the Removal of Copper Ions from Aqueous Solution

2018 ◽  
Vol 934 ◽  
pp. 181-186 ◽  
Author(s):  
Clare L. Garing ◽  
Jimyl M. Arabit ◽  
Lady Catherine C. Elec ◽  
Ramon Christian P. Eusebio ◽  
Ruby Lynn G. Ventura ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Chemical Modification ◽  
Copper Ions ◽  
Freundlich Isotherm ◽  
Copper Removal ◽  
Magnetic Sorbent ◽  
Cellulose Material ◽  
Regeneration Study ◽  
Modified Cellulose

Magnetic citric acid-modified cellulose was successfully produced and tested for the removal of copper in aqueous solution. Initially, the cellulose material was reacted with citric acid solution. The modified cellulose was then attached to the Fe2O3nanoparticle producing an adsorptive magnetic material. Characterization using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy indicated successful binding and chemical modification of the cellulose. Its adsorption was also studied to evaluate its potential in removing heavy metals such as copper. Removal of copper was as high as 84.74% in solution containing 25 mg/L copper. The sorption of copper in the magnetic sorbent follows second-order kinetics and best fits Freundlich isotherm model. The developed material has a strong magnetic response, thus its recovery in the aqueous solution could be easily facilitated using a magnetic field. Regeneration study indicated high recovery efficiency maintaining above 95.7% copper removal efficiency after three cycles of use. Thus, a highly efficient magnetic adsorptive material was produced using simple chemical modification aside from its easy recovery in the water.

scholarly journals Copper removal from aqueous solutions by sugar beet pulp treated by NaOH and citric acid

2007 ◽  
Vol 149 (2) ◽  
pp. 432-439 ◽  
Author(s):  
H. Soner Altundogan ◽  
N. Ezgi Arslan ◽  
Fikret Tumen
Keyword(s):  
Citric Acid ◽  
Sugar Beet ◽  
Aqueous Solutions ◽  
Sugar Beet Pulp ◽  
Copper Removal ◽  
Beet Pulp

Coadministration of citric acid allows oxytetracycline dose reduction in yellowtail Seriola quinqueradiata infected with Vibrio anguillarum

2020 ◽  
Vol 140 ◽  
pp. 25-29
Author(s):  
K Akiyama ◽  
N Hirazawa ◽  
A Hatanaka
Keyword(s):  
Body Weight ◽  
Citric Acid ◽  
Effective Treatment ◽  
Dose Reduction ◽  
Vibrio Anguillarum ◽  
Enhancing Effect ◽  
Bacterial Diseases ◽  
Seriola Quinqueradiata ◽  
Poor Efficacy

Oxytetracycline (OTC) has been commonly used as an effective antibiotic against various fish bacterial diseases, including vibriosis. In this study, the absorption-enhancing effect of citric acid on oral OTC pharmacokinetics and treatment of artificial Vibrio anguillarum infection was evaluated in juvenile yellowtail Seriola quinqueradiata followed by serum OTC concentration analysis. When 25 mg kg-1 body weight (BW) OTC was administered in combination with 1250 mg kg-1 BW citric acid, the serum OTC concentration reached almost the same concentration as that of the group treated with 50 mg kg-1 BW OTC. This coadministration successfully suppressed mortality due to vibriosis similar to the group treated with 50 mg kg-1 BW OTC. Conversely, poor efficacy was observed when only 25 mg kg-1 BW OTC was administered. These results suggest that coadministration of citric acid can be beneficial in reducing the dose of OTC needed for effective treatment, and thus contributes to the goal of reduced use of this antibiotic in aquaculture.

EFFECT OF SERUM GONADOTROPHIN ON DEHYDROGENASES OF THE CITRIC ACID CYCLE IN THE OVARY OF THE RAT

1963 ◽  
Vol 42 (4) ◽  
pp. 480-484 ◽  
Author(s):  
B. Eckstein ◽  
R. Landsberg
Keyword(s):  
Citric Acid ◽  
Citric Acid Cycle ◽  
Age Groups ◽  
Succinic Dehydrogenase ◽  
Immature Rat ◽  
Acid Cycle ◽  
Immature Rats ◽  
Rat Ovary

ABSTRACT The succinic, malic and isocitric dehydrogenases in the ovary of immature and mature, normal and serum gonadotrophin injected rats were examined. The Qo2 of these enzymes were markedly enhanced in the gonadotrophin injected rats of both age groups, except in the case of succinic dehydrogenase in the ovary of the immature rats, where a slight non-significant decrease was noted. It is concluded that in the mature rat ovary, gonadotrophin administration stimulates the activity of all the examined dehydrogenases of the citric acid cycle, whereas in the immature rat ovary, at least the isocitric- and malic dehydrogenases are thus stimulated.

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