scholarly journals Exploring pKa of Peroxycitric Acid Coexisting with Citric Acid in Aqueous Solution with Voltmmetric, Potentiometic and Chromatographic Approaches

2016 ◽  
pp. 6215-6228 ◽  
Author(s):  
Begum Nadira Ferdousi ◽  
Keyword(s):  
Aqueous Solution ◽  
Citric Acid

Citric acid modified waste cigarette filters for adsorptive removal of methylene blue dye from aqueous solution

2021 ◽  
pp. 50655
Author(s):  
Aafia Tehrim ◽  
Min Dai ◽  
Xiange Wu ◽  
Malik Muhammad Umair ◽  
Imran Ali ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Citric Acid ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Adsorptive Removal

scholarly journals Adsorption of heavy metals and methylene blue from aqueous solution with citric acid modified peach stone

2018 ◽  
Vol 53 (11) ◽  
pp. 1678-1688 ◽  
Author(s):  
Junhua Yan ◽  
Guihong Lan ◽  
Haiyan Qiu ◽  
Chao Chen ◽  
Yongqiang Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Citric Acid

scholarly journals Citric Acid Capped CdS Quantum Dots for Fluorescence Detection of Copper Ions (II) in Aqueous Solution

Nanomaterials ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 32 ◽  
Author(s):  
Zhezhe Wang ◽  
Xuechun Xiao ◽  
Tong Zou ◽  
Yue Yang ◽  
Xinxin Xing ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Citric Acid ◽  
Limit Of Detection ◽  
Copper Ions ◽  
High Sensitivity ◽  
Fluorescence Sensor ◽  
Cds Quantum Dots ◽  
Detection Range ◽  
Cds Qds

Citric acid capped CdS quantum dots (CA-CdS QDs), a new assembled fluorescent probe for copper ions (Cu2+), was synthesized successfully by a simple hydrothermal method. In this work, the fluorescence sensor for the detection of heavy and transition metal (HTM) ions has been extensively studied in aqueous solution. The results of the present study indicate that the obtained CA-CdS QDs could detect Cu2+ with high sensitivity and selectivity. It found that the existence of Cu2+ has a significant fluorescence quenching with a large red shifted (from greenish-yellow to yellowish-orange), but not in the presence of 17 other HTM ions. As a result, Cu2S, the energy level below the CdS conduction band, could be formed at the surface of the CA-CdS QDs and leads to the quenching of fluorescence of CA-CdS QDs. Under optimal conditions, the copper ions detection range using the synthesized fluorescence sensor was 1.0 × 10‒8 M to 5.0 × 10‒5 M and the limit of detection (LOD) is 9.2 × 10‒9 M. Besides, the as-synthesized CA-CdS QDs sensor exhibited good selectivity toward Cu2+ relative to other common metal ions. Thus, the CA-CdS QDs has potential applications for detecting Cu2+ in real water samples.

scholarly journals Study of Methods of Biodiesel Neutralization with Aqueous Solution of Lymonic Acid

2020 ◽  
Vol 154 ◽  
pp. 02007
Author(s):  
Viktor Polishсhuk ◽  
Svetlana Tarasenko ◽  
Ievgen Antypov ◽  
Nataliya Kozak ◽  
Andrii Zhyltsov ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Acid Solution ◽  
Volumetric Method ◽  
Citric Acid Solution

At the article is to determining an effective way to neutralize biodiesel and install optimal and rational parameters of biodiesel neutralization. The investigation of the efficiency of biodiesel neutralization was carried out by mixing it with aqueous citric acid solution (volumetric method) and by spraying an aqueous solution of citric acid over a layer of biodiesel (aerosol method).

Enhancement of carboxylic acid degradation with sulfate radical generated by persulfate activation

2010 ◽  
Vol 61 (5) ◽  
pp. 1221-1226 ◽  
Author(s):  
J. Criquet ◽  
P. Nebout ◽  
N. Karpel Vel Leitner
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Carboxylic Acids ◽  
Sulfate Radical ◽  
Acid Degradation ◽  
Competitive Reactions ◽  
Radical Production ◽  
Persulfate Activation ◽  
Kinetics Of

The aim of this work was to investigate the generation of sulfate radical for the removal of two carboxylic acids in aqueous solution: acetic and citric acids. From photochemical and radiolytic processes, kinetics of the degradation of these two carboxylic acids was studied as a function of the pH of the solution. It was shown that the maximum of acetic acid degradation occurred at pH 5. Above this pH, competitive reactions with the carbon mineralized inhibit the reaction of with the solute. In the case of citric acid, pH has only a little effect on the kinetic of citric acid degradation. The determination of mineralization yields shows several differences depending on carboxylic acids and pH. The degradation of both carboxylic acids was also studied in the radiolysis process whether with or without persulfate addition. A comparison of the processes of sulfate radical production is presented.

Enhanced malachite green removal from aqueous solution by citric acid modified rice straw

2006 ◽  
Vol 137 (2) ◽  
pp. 865-870 ◽  
Author(s):  
Renmin Gong ◽  
Youbin Jin ◽  
Fayang Chen ◽  
Jian Chen ◽  
Zhili Liu
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Rice Straw ◽  
Malachite Green

scholarly journals Synthesis of Calcium Silicate by a Chelate Gel Route with Aqueous Solution of Citric Acid.

2001 ◽  
Vol 109 (1269) ◽  
pp. 391-395 ◽  
Author(s):  
Hirotaka FUJIMORI ◽  
Daisuke YAHATA ◽  
Norio YAMAGUCHI ◽  
Daisuke IKEDA ◽  
Koji IOKU ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Calcium Silicate

Structural Study of Very Thin Anodic Alumina Films on Silicon by Anodization in Citric Acid Aqueous Solution

2005 ◽  
Vol 5 (3) ◽  
pp. 454-495 ◽  
Author(s):  
M. Kokonou ◽  
A.G. Nassiopoulou ◽  
K.P. Giannakopoulos ◽  
N. Boukos ◽  
A. Travlos
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Structural Study ◽  
Anodic Alumina ◽  
Alumina Films ◽  
Acid Aqueous Solution
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