Journal of Medicinal and Pharmaceutical Chemistry Research

Analysis of total phenol, flavonoid, and chlorogenic acid content of robusta coffee leaves extract using nades (natural deep eutectic solvent)

Henny Sri Wahyuni; Sri Yuliasmi; Lia Laila; Clara Claudia Jap

Volume 6, Issue 8 , August 2024, , Pages 1223-1236

https://doi.org/10.48309/jmpcr.2024.445119.1128

Abstract

Robusta coffee (Coffea canephora L.) is a widely traded tropical commodity recognized for alkaloids and flavonoids found in leaves, primarily identified as polyphenols. The use of Natural ... Read More

Peripherally modified poly (acrylic acid)/ ZnO nanocomposite hydrogel with selective superadsorption properties

Hadeel K. Albdairi; Aseel M. Aljeboree; Usama S. Altimari; Khulood Majid Alsaraf; Saif Yaseen Hasan; Ayad F. Alkaim

Volume 5, Issue 11 , November 2023, , Pages 1057-1071

https://doi.org/10.48309/jmpcr.2023.181198

Abstract

In this study, removal of three toxic chemical pollutants, such as crystal violet (CV) dye, tetracycline (TC) drug, and phenol (PH) using sodium alginate-g-poly (acrylicacid-co-sodium, ... Read More In this study, removal of three toxic chemical pollutants, such as crystal violet (CV) dye, tetracycline (TC) drug, and phenol (PH) using sodium alginate-g-poly (acrylicacid-co-sodium, 4-ethenylbenzenesulfonate, hydrate)/Zinc oxide, and SA-g-poly(AC-co-EBS)/ZnO hydrogel composite was prepared by co-polymerization method by addition of free radicals. The hydrogel composite was characterized by TEM, FESEM, and XRD. Removal of laboratory sample aqueous pollutants (dyes, drugs, and phenol) using hydrogel composite to give low absorbance (0.0001) utilizing UV-Vis spectrophotometer for at a chosen wavelength for 2 h. Comparative between ((SA-g-(PAAc-co-EBS)/ZnO, (SA-g-(PAAc-co-EBS), and ZnO NPs) surfaces as adsorbents. The best results of the percentage of removal (E%) of three pollutants arrange in order increasing (SA-g-(PAAC-co-EBS)/ZnO NPs > SA-g-(PAAC-co-EBS) > ZnO NPs), the good results of the percentage removal (E%) of hydrogel composite, (92, 451%, 87.56%, and 82.56%) for CV, TC, and PH, respectively. Likewise, comparative between the amount of Zinc oxide nanoparticles (ZnO NPs) decorated of (SA-g-(PAAC-co-EBS) using (0.05, 0.08, 0.1, and 0.15 g). The good results of the percentage of removal (E%) of three pollutants about 0.1 g ZnO NPs. Re-cyclability and desorption studies indicated the best re-cycling performance of the prepared composite. Based on the results, the prepared hydrogel composites can be useful as a promising, ecological, cost-effective, and efficient material for dyes decontamination. Studies was carry out using several desorption agents at concentration (0.01 N) like HNO3, NaOH, H3PO4, H2SO4, HCl, and water. The hydrogel composite, was regeneration with 100% can be desorbed in diluted hydrochloric acid (0.01 N). The isotherm Freundlich and Langmuir models are also introduced, it has been found that all results follow the Freundlich model in the presence of three pollutants; this nonlinearity is higher when using the Freundlich model.

Electrospun polystyrene nanofiber adsorbent for solid phase extraction of phenol as its quinoid derivative from aqueous solutions

Shahab Shariati; Elnaz Shahpanah; Azam Bolouri; Negar Hashemifard; Fatemeh Shariati

Volume 1, Issue 5 , September and October 2019, , Pages 470-479

Abstract

In the present study, polystyrene nanofibers (PS NFs) were synthesized by electrospinning method and used as adsorbents in solid phase extraction of phenol from aqueous solutions. Phenol ... Read More

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Keywords = phenol

Analysis of total phenol, flavonoid, and chlorogenic acid content of robusta coffee leaves extract using nades (natural deep eutectic solvent)

Abstract

Peripherally modified poly (acrylic acid)/ ZnO nanocomposite hydrogel with selective superadsorption properties

Abstract

Electrospun polystyrene nanofiber adsorbent for solid phase extraction of phenol as its quinoid derivative from aqueous solutions

Abstract