Study of the Effect of Acid-base Character of the Lamellar Double Hydroxides "Zn3Al-CO3" and of the "Ghassoul" Clay on Their Redox Potential and Antimicrobial Activities

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-12-10 DOI:10.22068/IJMSE.2202

J. Zerhouni, F. Filali, M. Bennani, O. Qabaqous, Aziz Bouymajane, J. Houssaini, Safae Allaoui, Faouzia Benhallam

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引用次数: 5

Abstract

Our study is to highlight the effect of the acid-base character and the redox potential of two clays, synthetic anionic Layered Double Hydroxides Zn3Al-CO3 (LDH) clay, and natural commercial cationic clay "Ghassoul" on their antioxidant and antibacterial activities. The antibacterial effect was tested on two Gram-positive bacteria: Staphylococcus aureus and Enterococcus faecalis. Then it was tested on a Gram-negative bacterium: Escherichia coli. The determination of the minimum inhibitory concentration of the two materials was carried out using the microplate microtitration technique. The antioxidant activities of clays are assessed by the methods 2.2-diphenyl-1picrylhydrazyl and the reducing power of iron (Fe3+). The redox potential (Eh) was measured and the redox strength (rH2) was evaluated. The results showed that these materials have an antibacterial effect on the three bacteria tested, the measured zero charge point of Ghassoul (pHzpc =8.75) more basic than that of double layer hydroxide (pHzpc =7.5), redox potential of LDH (-27 mV) was higher than that of Gh (103mV), and the rH2 of Gh (14.04) was higher compared to anionic clay (13.33).

查看原文本刊更多论文

层状双氢氧化物“Zn3Al-CO3”和“Ghassoul”粘土的酸碱性质对其氧化还原电位和抗菌活性的影响

我们的研究旨在强调两种粘土的酸碱特性和氧化还原电位对其抗氧化和抗菌活性的影响，这两种粘土是合成阴离子层状双氢氧化物Zn3Al-CO3（LDH）粘土和天然商业阳离子粘土“Ghassoul”。对两种革兰氏阳性菌：金黄色葡萄球菌和粪肠球菌进行了抗菌试验。然后在革兰氏阴性菌大肠杆菌上进行了测试。采用微量滴定法测定了两种材料的最小抑菌浓度。用2.2—二苯基—1二芳基肼和铁（Fe3+）还原能力的方法评价了粘土的抗氧化活性。测量氧化还原电位（Eh）并评估氧化还原强度（rH2）。结果表明，这些材料对测试的三种细菌都有抗菌作用，测得的Ghassoul的零电荷点（pHzpc=8.75）比双层氢氧化物（pHzpc=7.5）更碱性，LDH的氧化还原电位（-27mV）比Gh的氧化还原电势（103mV）高，Gh的rH2（14.04）比阴离子粘土（13.33）高。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.