Synthesis of Ethylenediaminetetraacetic Acid Disodium Salt Functionalized Magnetite/Chitosan Nanospheres for the Highly Efficient Removal of Methylene Blue

2021 ◽  
Vol 21 (3) ◽  
pp. 1694-1702
Author(s):  
Mengke Zheng ◽  
Zhenguo Wu ◽  
Yang Wang ◽  
Nannan Chen ◽  
Zhaogang Teng ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Ethylenediaminetetraacetic Acid ◽  
Disodium Salt ◽  
Pseudo Second Order ◽  
Sorption Parameters ◽  
Adsorption Kinetics And Isotherm ◽  
Adsorption Desorption ◽  
The Impact ◽  
Desorption Cycle ◽  
Ethylenediaminetetraacetic Acid Disodium Salt

In this paper, novel Ethylenediaminetetraacetic acid disodium salt (EDTA) functionalized magnetite/ chitosan nanospheres (Fe3O4/CS-EDTA) are synthesized by combining solvothermal method and chemical modification, and they are further applied as a kind of adsorbent to eliminate dye of methylene blue (MB) from wastewater. The properties as well as structure exhibited by the fabricated adsorbent are characterized through FTIR, XRD, TG and TEM, together with VSM. The impact exerted by sorption parameters (time of contact, initial dye concentration, temperature, etc.) on the adsorptions were evaluated in batch system. These results demonstrated that our magnetic materials held the adsorption capacity for MB of 256 mg g−1 (pH = 11), and the kinetic model of pseudo-second-order and the Langmuir model could make an effective simulation regarding the adsorption kinetics and isotherm, respectively. Besides, the external magnetic field can assist in easily separating dye adsorbed Fe3O4/CS-EDTA from solution for regeneration. The removal efficiency of recycled adsorbents remained above 92% in the 5th adsorption/desorption cycle. These superioritiesmake Fe3O4/CS-EDTA a high-efficientmultifunctional adsorbent for removing dyes from wastewater.

scholarly journals Ethylenediaminetetraacetic Acid Disodium Salt Acts as an Antifungal Candidate Molecule against Fusarium graminearum by Inhibiting DON Biosynthesis and Chitin Synthase Activity

Toxins ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 17
Author(s):  
Xiu-Shi Song ◽  
Kai-Xin Gu ◽  
Jing Gao ◽  
Jian-Xin Wang ◽  
Shao-Chen Ding ◽  
...  
Keyword(s):  
Ethylenediaminetetraacetic Acid ◽  
Fusarium Species ◽  
Field Tests ◽  
Disodium Salt ◽  
H2o2 Production ◽  
Chitin Synthesis ◽  
Head Blight ◽  
Control Effect ◽  
Ethylenediaminetetraacetic Acid Disodium Salt

Fusarium fungi are the cause of an array of devastating diseases affecting yield losses and accumulating mycotoxins. Fungicides can be exploited against Fusarium and deoxynivalenol (DON) production. However, Fusarium resistance to common chemicals has become a therapeutic challenge worldwide, which indicates that new control agents carrying different mechanisms of action are desperately needed. Here, we found that a nonantibiotic drug, ethylenediaminetetraacetic acid disodium salt (EDTANa2), exhibited various antifungal activities against Fusarium species and DON biosynthesis. The infection of wheat seeding caused by F. graminearum was suppressed over 90% at 4 mM EDTANa2. A similar control effect was observed in field tests. Mycotoxin production assays showed DON production was significantly inhibited, 47% lower than the control, by 0.4 mM EDTANa2. In vitro experiments revealed a timely inhibition of H2O2 production as quickly as 4 h after amending cultures with EDTANa2 and the expression of several TRI genes significantly decreased. Chitin synthases of Fusarium were Mn2+-containing enzymes that were strongly inhibited by Mn2+ deficiency. EDTANa2 inhibited chitin synthesis and destroyed the cell wall and cytomembrane integrity of Fusarium, mainly via the chelation of Mn2+ by EDTANa2, and thus led to Mn deficiency in Fusarium cells. Taken together, these findings uncover the potential of EDTANa2 as a fungicide candidate to manage Fusarium head blight (FHB) and DON in agricultural production.

scholarly journals A High-Performance Liquid Chromatography:Chemiluminescence Method for Potential Determination of Vardenafil in Dietary Supplement

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Youjun Di ◽  
Min Zhao ◽  
Yingchun Nie ◽  
Fei Wang ◽  
Jiagen Lv
Keyword(s):  
Aqueous Solution ◽  
Mobile Phase ◽  
High Performance ◽  
Ethylenediaminetetraacetic Acid ◽  
Disodium Salt ◽  
Relative Standard ◽  
Oral Liquid ◽  
Interday Precision ◽  
Ethylenediaminetetraacetic Acid Disodium Salt

A flow method of high-performance liquid chromatography (HPLC) seperation and chemiluminescence (CL) detection for sensitive vardenafil analysis in dietary supplements was developed. The vardenafil separation was achieved on a C18 column at 30∘C using ethanol-H3PO4and ethylenediaminetetraacetic acid disodium salt (Na2EDTA) aqueous solution (25 : 75, v/v%) as mobile phase. The followed continuous CL detection was conducted based on the strong CL enhancement by the presence of vardenafil to luminol-K3Fe(CN)6reaction in alkaline medium. At the flow rate of 0.8 mL/min, the vardenafil retention time () was 6.4 min. Factors that affected the HPLC resolution and CL detection were studied and optimized. The calibration curve obtained for vardenafil standard was linear in concentration range of  mol/L. The relative standard deviations (RSD) of intraday and interday precision were less than 3.5%. The proposed method was applied to the vardenafil determination in oral liquid, wine, and capsule samples.

scholarly journals Interference of Lithium in Measuring Magnesium by Complexometry: Discussions of the Mechanism

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Jie Gao ◽  
Yafei Guo ◽  
Shiqiang Wang ◽  
Tianlong Deng ◽  
Yu-Wei Chen ◽  
...  
Keyword(s):  
Relative Error ◽  
Nmr Spectra ◽  
Ethylenediaminetetraacetic Acid ◽  
Disodium Salt ◽  
Salt Lakes ◽  
Anhydrous Ethanol ◽  
Large Concentration ◽  
Complexometric Titration ◽  
Alcohol Mixture ◽  
Ethylenediaminetetraacetic Acid Disodium Salt

There is usually a large concentration of magnesium in the brine of salt lakes and as a consequence it is difficult to measure Mg2+accurately with the complexometric titration by ethylenediaminetetraacetic acid disodium salt (EDTA) because of the large levels of Li+also coexisting in brine samples. In this study, a relationship between the relative error related to the number of drops of the indicator and the NMR spectra of anhydrous ethanol and n-butanol, with or without LiCl, was analyzed and compared. It was then possible to suggest a mechanism to explain the interference of Li+when measuring Mg2+and to control the interference in the alcohol mixture because Li+can then complex with the alcohols and mainly form a complex with n-butanol.

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