中文摘要：沸石常被用作吸附材料，其负载的阳离子可以与金属离子交换以增加抗菌性能。本研究的目的是使用4A沸石及其衍生的与Zn2+, Li+, Cu2+ and Co2+的离子交换形式来评估其对禾谷镰刀菌的抗菌性能，包括其在金属离子释放、分生孢子萌发和脱氧雪腐镰刀菌烯醇（DON）吸附方面的能力。琼脂稀释法结果表明：具有Li+、Cu2+和Co2+的离子交换沸石在45.3 +/- 0.6mm、25.7 +/- 1.5mm和24.7 +/- 0.6mm样品浓度时显示出优异的抗禾谷镰刀菌活性；具有Zn2+、Li+、Cu2+和Co2+的离子交换沸石显示出了对禾谷镰刀菌有效的生长抑制，抑制效果按以下顺序逐渐减弱：沸石-Cu2+>沸石-Li+>沸石-Co2+>沸石-Zn2+。另外，分生孢子萌发受到离子交换沸石的强烈影响。吸附能力试验结果表明只有沸石-Li+在2mg/ml浓度下能够显著吸附37%的DON（P＜0.001）。离子交换沸石的抗真菌作用可归因于从沸石结构释放的金属离子的相互作用，特别是沸石-Li+，是一种有前景的抗禾谷镰刀菌及其毒素的药剂。
外文摘要：Zeolites are often used as adsorbents materials and their loaded cations can be exchanged with metal ions in order to add antimicrobial properties. The aim of this study was to use the 4A zeolite and its derived ion-exchanged forms with Zn2+, Li+, Cu2+ and Co2+ in order to evaluate their antifungal properties against Fusarium graminearum, including their capacity in terms of metal ions release, conidia germination and the deoxynivalenol (DON) adsorption. The zeolites ion-exchanged with Li+, Cu2+, and Co2+ showed an excellent antifungal activity against F. graminearum, using an agar diffusion method, with a zone of inhibition observed around the samples of 45.3 +/- 0.6mm, 25.7 +/- 1.5mm, and 24.7 +/- 0.6mm, respectively. Similar results using agar dilution method were found showing significant growth inhibition of F. graminearum for ion-exchanged zeolites with Zn2+, Li+, Cu2+, and Co2+. The fungi growth inhibition decreased as zeolite-Cu2+>zeolite-Li+>zeolite-Co2+>zeolite-Zn2+. In addition, the conidia germination was strongly affected by ion-exchanged zeolites. With regard to adsorption capacity, results indicate that only zeolite-Li+ were capable of DON adsorption significantly (P < 0.001) with 37% at 2mg mL(-1) concentration. The antifungal effects of the ion-exchanged zeolites can be ascribed to the interactions of the metal ions released from the zeolite structure, especially for zeolite-Li+, which showed to be a promising agent against F. graminearum and its toxin.
外文关键词：Zeolite；ion-exchange；F. graminearum；deoxynivalenol；antifungal； adsorption capacity
作者：Savi, Geovana D.；Cardoso, William A.；Furtado, Bianca G.等
作者单位：Universidade do Sul de Santa Catarina
期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
期刊影响因子：1.362
出版年份：2018
出版刊次：3
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