Research Article
Synthesis of Montmorillonite-Silica Nanocomposite Using Millet Husk and Montmorillonite Clay and Optimization of Adsorption Parameters for Congo Red Dye Adsorption
Issue:
Volume 9, Issue 4, December 2024
Pages:
56-60
Received:
9 August 2024
Accepted:
3 September 2024
Published:
10 October 2024
Abstract: Dyes are substances that, when applied to a substrate provides color by a process that alters, at least temporarily, any crystal structure of the colored substances The discharge of these effluents into the receiving environments results in hazardous health problems as most of these dyes have carcinogenic effects on the living organisms. Generally, dyes are classified into three categories: a) anionic: direct, acid, and reactive dyes; b) cationic: basic dyes; and c) non-ionic: disperse dyes. The chromophores in anionic and non-ionic dyes mostly consist of azo groups or anthraquinone types. However, Congo red, are difficult to biodegrade due to their complex aromatic structures, which provide them with physico-chemical, thermal, and optical stability. This study is aimed at synthesizing Montmorillonite-silica nanocomposite, a cost effective adsorbent from millet husk and Montmorillonite-clay with the determination of its optimum adsorption parameters for Congo Red Dye adsorption. Here, synthesis of Montmorillonite-silica nanocomposite and optimization parameters were carried out using standard procedures. The unbiased result demonstrated that the percentage yield was found to be 94.51 %. The optimum adsorption parameters studied were adsorbent dose, adsorbate concentration, pH and Kinetics studies. The optimum adsorption parameters were found to be 8.0 g/L, 2.0 mg/L, 8 and 30 minutes, respectively. Hence, the synthesized Montmorillonite-silica nanocomposite obtained from montmorillonite clay and millet husk ash can serve as a cost-effective adsorbent for the removal of Congo Red Dye from waste waters.
Abstract: Dyes are substances that, when applied to a substrate provides color by a process that alters, at least temporarily, any crystal structure of the colored substances The discharge of these effluents into the receiving environments results in hazardous health problems as most of these dyes have carcinogenic effects on the living organisms. Generally,...
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Research Article
Characterization of Paullinia pinnata (Sapindaceae) Root Extracts by GC-MS and HPLC-ESI-QTOF-MS: An Ivorian Medicinal Plant at the Service of Cardiovascular Diseases
Issue:
Volume 9, Issue 4, December 2024
Pages:
61-68
Received:
27 November 2024
Accepted:
11 December 2024
Published:
30 December 2024
DOI:
10.11648/j.wjac.20240904.12
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Abstract: The study of chemical constituents is an essential element in the valorization of medicinal plants, which can be used to treat a number of pathologies. This work aims to contribute to a better understanding of the chemical composition of Paullinia pinnata (Sapindaceae), a medicinal plant used in Côte d'Ivoire for the traditional treatment of cardiovascular diseases. This study explores the relationship between the compounds identified in this plant and its use in cardiovascular disease treatment. Extraction methods (solid/liquid and liquid/liquid) and identification by GC-MS and HPLC-ESI-QTOF-MS analyses were used. The GC-MS analysis of the various extracts (hexane, dichloromethane and ethyl acetate) identified 32 compounds consisting of steroids, triterpenes, fatty acids, alkaloids and phenolic compounds. HPLC-ESI-QTOF-MS analysis of these extracted memes identified 21 phenolic compounds. In total 53 compounds were identified with the two analytical methods used. These molecules identified are: palmitic acid, 9-(E)-octadecenoic acid, stigmasterol, β-Sitosterol, umbelliferone, epicatechin quinone, clemiscosin A, caffeic acid, catechin, epicatechin and O-β-D-glucopyranosyloxy-4-methyl-2 (5 H)-furanone, cinnamtannin B-2; cinnamtannin B1, procyanidin B2, epicatechin quinone, clemiscosin C, clemiscosin A, kaempferide and epicatechin. These compounds have been identified for their antioxidant, anti-free radical, cardiotonic, neuroprotective and anti-inflammatory properties. The presence of these compounds could justify the use of Paullinia pinnata in the traditional treatment of cardiovascular diseases.
Abstract: The study of chemical constituents is an essential element in the valorization of medicinal plants, which can be used to treat a number of pathologies. This work aims to contribute to a better understanding of the chemical composition of Paullinia pinnata (Sapindaceae), a medicinal plant used in Côte d'Ivoire for the traditional treatment of cardio...
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,
Ernest Isaac*
