Effects of metal ions on the interaction between polyethylenimine and azo dyes carrying hydroxyl groups

1985 ◽  
Vol 23 (1) ◽  
pp. 255-259 ◽  
Author(s):  
Toru Takagishi ◽  
Kiyoaki Yoshikawa ◽  
Sadatsugu Okuda ◽  
Nobuhiko Kuroki ◽  
Hiroshi Kozuka
Keyword(s):  
Metal Ions ◽  
Azo Dyes ◽  
Hydroxyl Groups

scholarly journals Utilization and simulation of innovative new binuclear Co(ii), Ni(ii), Cu(ii), and Zn(ii) diimine Schiff base complexes in sterilization and coronavirus resistance (Covid-19)

2021 ◽  
Vol 19 (1) ◽  
pp. 772-784
Author(s):  
Moamen S. Refat ◽  
Ahmed Gaber ◽  
Walaa F. Alsanie ◽  
Mohamed I. Kobeasy ◽  
Rozan Zakaria ◽  
...  
Keyword(s):  
Schiff Base ◽  
Molecular Docking ◽  
Metal Ions ◽  
Free Ligand ◽  
Schiff Base Complexes ◽  
Hydroxyl Groups ◽  
Binuclear Complexes ◽  
Central Metal ◽  
H Nmr ◽  
Biological Studies

Abstract This article aimed at the synthesis and molecular docking assessment of new diimine Schiff base ligand, namely 2-((E)-(2-((Z)-2-(4-chlorophenyl)-2-hydroxyvinyl)hydrazono) methyl)-6-methoxyphenol (methoxy-diim), via the condensation of 1-(4-chloro-phenyl)-2-hydrazino-ethenol compound with 2-((E)-(2-((Z)-2-(4-chlorophenyl)-2-hydroxy vinyl) hydrazono)methyl)-6-methoxyphenol in acetic acid as well as the preparation of new binuclear complexes of Co(ii), Ni(ii), Cu(ii), and Zn(ii). The following synthesized complexes were prepared in a ratio of 2:1 (metal/ligand). The 1H-NMR, UV-Vis, and FTIR spectroscopic data; molar conductivity measurements; and microanalytical, XRD, TGA/DTG, and biological studies were carried out to determine the molecular structure of these complexes. According to the spectroscopic analysis, the two central metal ions were coordinated with the diamine ligand via the nitrogen of the hydrazine and oxygen of the hydroxyl groups for the first metal ions and via the nitrogen of the hydrazine and oxygen of the phenol group for the second metal ions. Molecular docking for the free ligand was carried out against the breast cancer 3hb5-oxidoreductase and the 4o1v-protein binding kidney cancer and COVID-19 protease, and good results were obtained.

scholarly journals Adsorpsi Logam Ni dan Cu pada Limbah Cair Laboratorium Kimia menggunakan Biosorben Batang Jagung Termodifikasi Asam Sitrat

ALCHEMY ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 13
Author(s):  
Eny Yulianti ◽  
RIf'atul Mahmudah ◽  
Ainul Ma'rifah ◽  
Ulal Azmiyani
Keyword(s):  
Citric Acid ◽  
Metal Ions ◽  
Functional Group ◽  
Liquid Waste ◽  
Hydroxyl Groups ◽  
Corn Stalk ◽  
Adsorption Ability ◽  
Chemical Laboratory ◽  
Lactone Group ◽  
Carboxylic Groups

<p class="BodyAbstract">Corn stalk contains 40-50% cellulose, 20-40% hemicellulose, 4-15% lignin which had potential as biosorbent in binding metal ions. In this study, demineralization and modification by adding citric acid (1.5 M and 2 M) of corn stalk were conducted to convert hydroxyl groups into carboxylic. Then, it was analyzed its functional groups using Boehm titration and FTIR. The modified corn stalk was applied directly to chemical laboratory liquid waste which contains multicomponent of heavy metal ions. By modifying the corn stalk, the number of hydroxyl and carboxylic groups increased, but the number of lactone group was constant. The success of the modification was characterized by the appearance of ester uptake at 1734 cm<sup>-1</sup> and increased adsorption ability. The variations in the concentration of citric acid in modification corn stalk showed that biosorbent with addition 1.5 M citric acid had higher in the number of acid site than addition 2 M citric acid to absorb Ni and Cu.</p><p> <br /> Keywords: Corn stalk, citric acid, biosorbent, functional group</p><p class="BodyAbstract"><strong> </strong></p><p class="BodyAbstract"><strong> </strong></p><p>Batang jagung mengandung sekitar 40-50% selulosa, 20-40% hemiselulosa, 4-15% lignin yang berpotensi sebagai biosorben pengikat ion logam. Pada penelitian ini dilakukan demineralisasi dan modifikasi dengan penambahan asam sitrat (1,5 M dan 2 M) untuk mengubah gugus hidroksil pada selulosa membentuk karboksilat. Selanjutnya, dianalisis gugus fungsinya menggunakan titrasi Boehm dan FTIR. Hasil modifikasi diaplikasikan langsung pada limbah cair laboratorium kimia yang mengandung banyak jenis ion logam berat. Biosorben batang jagung setelah dimodifikasi mengalami peningkatan jumlah gugus fungsi hidroksil dan karboksilat, tetapi gugus lakton tetap. Keberhasilan modifikasi ditandai dengan munculnya serapan ester pada 1734 cm<sup>-1 </sup>dan peningkatan kemampuan adsorpsi. Dari hasil variasi konsentrasi asam sitrat diperoleh informasi bahwa biosorben dengan penambahan asam sitrat 1,5 M mempunyai situs asam lebih tinggi dan mempunyai kemampuan adsorpsi terhadap ion logam Ni dan Cu lebih besar dibanding penambahan asam sitrat 2 M.</p><p><span style="text-decoration: line-through;"> </span></p><p>Kata kunci:  Batang jagung, asam sitrat, biosorben, gugus fungsi</p>

scholarly journals Modeling of neotame and fructose thermochemistry: Comparison with mono and divalent metal ions by Computational and experimental approach

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Deepali Sharma ◽  
Suvardhan Kanchi ◽  
Ayyappa Bathinapatla ◽  
Inamuddin ◽  
Abdullah M. Asiri
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Density Functional ◽  
Divalent Metal ◽  
Basis Set ◽  
Hydroxyl Groups ◽  
Specific Cell ◽  
Water Medium ◽  
Artificial Sweetener ◽  
Divalent Metal Ions

AbstractThe metal complexes can demonstrate various interesting biological activities in the human body. However, the role of certain metal ions for specific cell activities is still subject to debate. This study is aimed at comparing the thermochemical properties of neotame (artificial sweetener) and α, β-fructose in gas phase and water medium. The interaction of α and β-fructose, neotame with monovalent and divalent metal ions was studied and comprehended by density functional theory (DFT) using B3LYP functional, 6–311 + G (d, p) and D3 basis set. Metal ion affinities (MIA) values depicted that ionic radius of metal ions played an important role in the interaction of α, β-fructose and neotame. The ∆G parameter was calculated to predict and understand the interaction of metal ions with α and β-fructose, neotame. The results suggested that the presence of hydroxyl groups and oxygen atoms in sugar molecules acted as preferred sites for the binding and interaction of mono and divalent ions. For the first time computational study has been introduced in the present study to review the progress in the application of metal binding with sugar molecules especially with neotame. Moreover, voltammetric behaviour of neotame-Zn2+ was studied using cyclic and differential pulse voltammetry. The obtained results suggest that the peak at −1.13 V is due to the reduction of Zn2+ in 0.1 M phosphate buffer medium at pH 5.5. Whereas, addition of 6-fold higher concentration of neotame to the ZnCl2.2H2O resulted in a new irreversible cathodic peak at −0.83, due to the reduction of neotame-Zn2+ complex. The Fourier transform infrared spectroscopy (FTIR) results indicates that the β-amino group (-NH) and carboxyl carbonyl (-C = O) groups of neotame is participating in the chelation process, which is further supported by DFT studies. The findings of this study identify the efficient chelation factors as major contributors into metal ion affinities, with promising possibilities to determine important biological processes in cell wall and glucose transmembrane transport.

Synthesis and Characterization of Carbon/Bentonite Composite

2012 ◽  
Vol 549 ◽  
pp. 703-706
Author(s):  
De Yi Zhang ◽  
Jing Wu ◽  
Bai Yi Chen ◽  
He Ming Luo ◽  
Kun Jie Wang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Heavy Metal Ions ◽  
Low Cost ◽  
Raw Material ◽  
Hydroxyl Groups ◽  
Carbon Particles ◽  
Prepared Composite

In this paper, a novel carbon/bentonite composite was prepared using sucrose as carbon source and bentonite as raw material. The characterization results shown that plenty of carbon particles distribute on the surface of the composite, and an abundant of functional groups, such as SO3H, carboxylic and hydroxyl groups, were successfully introduced onto the surface of the prepared composite. The adsorption capacity of the prepared composite for typical heavy metal ions and methylene blue deys also was investigated and compared with activated carbon and bentonite, the results show that the composite shows excellent adsorprion performance for heavy metal ions, and the adsorption capacity for Cu2+and Ni2+ increase by 136% and 591% than natural bentonite, respectSuperscript textively. The prepared composite with excellent adsorption performance could be used as a low-cost alternative to activated carbon for the treatment of heavy metal ions polluted wastewater.

Specific interaction between polyethylenimine and azo dyes carrying hydroxyl groups

1985 ◽  
Vol 23 (1) ◽  
pp. 37-47 ◽  
Author(s):  
Toru Takagishi ◽  
Kiyoaki Yoshikawa ◽  
Hiromitsu Hamano ◽  
Nobuhiko Kuroki ◽  
Hiroshi Kozuka
Keyword(s):  
Azo Dyes ◽  
Specific Interaction ◽  
Hydroxyl Groups

scholarly journals The use of some heterocyclic azo dyes in polarographic analysis of metal ions

2018 ◽  
Vol 59 (1) ◽  
pp. 172 ◽  
Author(s):  
L. Dubenska ◽  
S. Pysarevska ◽  
S. Tvorynska ◽  
M. Mykytyuk ◽  
O. Drymalyk
Keyword(s):  
Metal Ions ◽  
Azo Dyes ◽  
Polarographic Analysis

scholarly journals Use of Chlorella sorokiniana biomass as an oral sorbent

2020 ◽  
Vol 61 (1) ◽  
pp. 126-132
Author(s):  
Amira Toumi ◽  
◽  
Yulia A. Smyatskaya ◽  
Natalia A. Politaeva ◽  
◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Sorption Capacity ◽  
Human Body ◽  
Heavy Metal Ions ◽  
Chlorella Sorokiniana ◽  
Sorption Properties ◽  
Hydroxyl Groups ◽  
Microalgal Biomass ◽  
Ph Values

This article presents an assessment of the biosorption capacity of Chlorella sorokiniana microalgae in relation to heavy metal ions (Zn2+, Cd2+, Pb2+, Cu2+) at various pH values. With the development of industry, several environmental threats have emerged, including heavy metal pollution. This form of pollution has negative effects in the short and long term on the health of animals and humans. To prevent the accumulation of harmful substances in the human body, it is advised to use oral sorbents in prophylactic and therapeutic purposes. Oral sorbents have the ability to adsorb and neutralize certain toxins in the stomach and the intestines and remove them from the human body. The present article investigated the possibility of using microalgae Chlorella sorokiniana as an oral sorbent. The sorption capacity of Chlorella sorokiniana microalgal biomass was determined by voltammetry of standard solutions with an initial concentration of heavy metal ions of 10 mg/L. The removal efficiency ranged from 88 to 99%. The studies were carried out at pH values from 2 to 6. The sorption capacity was high at all considered acidity values. Sorption properties were confirmed by the study of the IR spectrum and microscopy of the freeze-dried biomass samples. The surface of the sorption material was studied by electron microscopy depicting the presence of multiple pores and depressions. It could be assumed that the sorption properties of microalgae are partly due to physical processes. Freeze drying can significantly increase the active surface area of the sample. The presence of hydroxyl groups in the biomass was confirmed by IR-spectroscopy indicating the chemical nature of the sorption process.

scholarly journals Degradation of Azo Dyes with Different Functional Groups in Simulated Wastewater by Electrocoagulation

Water ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 123
Author(s):  
Yang Liu ◽  
Chenglong Li ◽  
Jia Bao ◽  
Xin Wang ◽  
Wenjing Yu ◽  
...  
Keyword(s):  
Functional Groups ◽  
Azo Dyes ◽  
Current Intensity ◽  
Hydroxyl Groups ◽  
Time Saving ◽  
Alizarin Yellow ◽  
Energy Conserving ◽  
Carcinogenic Effects ◽  
Simulated Wastewater ◽  
Hydroxyl Free Radicals

Increasing attention has been paid to the widespread contamination of azo dyes in water bodies globally. These chemicals can present high toxicity, possibly causing severe irritation of the respiratory tract and even carcinogenic effects. The present study focuses on the periodically reverse electrocoagulation (PREC) treatment of two typical azo dyes with different functional groups, involving methyl orange (MO) and alizarin yellow (AY), using Fe-Fe electrodes. Based upon the comparative analysis of three main parameters, including current intensity, pH, and electrolyte, the optimal color removal rates for MO and AY could be achieved at a rate of up to 98.7% and 98.6%, respectively, when the current intensity is set to 0.6 A, the pH is set at 6.0, and the electrolyte is selected as NaCl. An accurate predicted method of response surface methodology (RSM) was established to optimize the PREC process involving the three parameters above. The reaction time was the main influence for both azo dyes, while the condition of PREC treatment for AY simulated wastewater was time-saving and energy conserving. According to the further UV–Vis spectrophotometry analysis throughout the procedure of the PREC process, the removal efficiency for AY was better than that of MO, potentially because hydroxyl groups might donate electrons to iron flocs or electrolyze out hydroxyl free radicals. The present study revealed that the functional groups might pose a vital influence on the removal efficiencies of the PREC treatment for those two azo dyes.

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