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首页> 外文期刊>RSC Advances >Antifouling activities of pristine and nanocomposite chitosan/TiO2/Ag films against freshwater algae
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Antifouling activities of pristine and nanocomposite chitosan/TiO2/Ag films against freshwater algae

机译：原始和纳米复合壳聚糖/ TiO 2 / Ag膜对淡水藻类的防污活性

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Adhesion of microalgae or biofouling on submerged artificial surfaces is a universal problem in freshwater environments. Herein, we developed Ag and TiO2 nanoparticle (NP)-incorporated nanocomposite and pristine films using chitosan for antifouling applications in freshwater environments. Both TiO2 and Ag NPs are known for their algaecide activity. Hence, nanocomposite (Ag/TiO2 and TiO2/Ag) and pristine (Ag, TiO2) films containing a range of concentrations of both particles were tested against two freshwater algae, specifically, Scenedesmus sp. and Chlorella sp. under different photo conditions. The toxicity assays show that Scenedesmus sp. is more sensitive to all the films tested than Chlorella sp. under both UV-C exposure and dark conditions. The slime formation, biomass (%), LPO, and uptake of the NPs are correlated well with their toxicity data. EPS release is noted to be higher for Scenedesmus sp. than Chlorella sp. due to the higher toxicity of this algal species. This indicates that the species variation substantially influences the antifouling action of both the pristine and nanocomposite films.
机译：在水下环境中，微藻类的粘附或生物污垢在淹没的人工表面上是普遍存在的问题。在这里，我们开发了使用壳聚糖的Ag和TiO 2 纳米颗粒（NP）掺入的纳米复合材料和原始膜，用于淡水环境中的防污应用。 TiO 2 和Ag NPs均具有除藻活性。因此，纳米复合材料（Ag / TiO 2 和TiO 2 / Ag）和原始（Ag，TiO Scenedesmus sp。）进行了测试，其中包含不同浓度的两种颗粒的> 2 ）膜。和 Chlorella sp。在不同的照片条件下。毒性试验表明， Scenedesmus sp。对所有测试的影片都比 Chlorella sp。敏感。在UV-C暴露和黑暗条件下。煤泥的形成，生物量（％），LPO和NP的吸收与其毒性数据密切相关。注意到 Scenedesmus sp的EPS释放较高。比 Chlorella sp。由于这种藻类具有更高的毒性。这表明物种的变化实质上影响了原始膜和纳米复合膜的防污作用。

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