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首页> 外文期刊>RSC Advances >Biocompatible nano hydroxyapatite - curcumin bi-coated antibacterial activated carbon for water purification
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Biocompatible nano hydroxyapatite - curcumin bi-coated antibacterial activated carbon for water purification

机译：生物相容性纳米羟基磷灰石-姜黄素双涂层抗菌活性炭，用于净水

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Activated carbon has been used for water purification since ancient times due to its well-known sorption properties. However it is not capable of disinfecting water borne pathogens such as bacteria. The main objective of this study was to incorporate antibacterial properties while maintaining the existing properties of Granular Activated Carbon (GAC). This was achieved by a biocompatible double coating on to GAC which consists of hydroxyapatite (HAP) nanoparticles and on top of those curcumin molecules. Coating of GAC with HAP was carried out using in situ precipitation of HAP under basic conditions. A layer of curcumin molecules was then attached on top of the HAP coating in order to obtain HAP-curcumin bi-coated GAC (HAP/C/GAC). Synthesized HAP/GAC and HAP/C/GAC were characterized using FT-IR spectroscopy, scanning electron microscopy (SEM), powder X-ray diffractometry (PXRD) and thermogravimetry (TGA). Characterization revealed that needle shaped HAP nanoparticles (50-100 nm in width and approximately 200-500 nm in length) can be anchored and immobilized successfully on GAC which in turn enhances the adhesion of curcumin on it. Antibacterial properties of pure GAC, HAP/GAC and HAP/C/GAC were then investigated using both Gram negative (Escherichia coli) and Gram positive (Staphylococcus aureus) bacteria. The results show that the antibacterial properties of HAP/C/GAC are remarkably higher than that of HAP/GAC and the antibacterial activity of pure GAC is negligible.
机译：自古以来，活性炭就因其众所周知的吸附特性而用于水净化。但是，它不能对水传播的病原体（例如细菌）进行消毒。这项研究的主要目的是在保持颗粒活性炭（GAC）现有特性的同时兼顾抗菌性能。这是通过在GAC上生物相容的双重涂层实现的，该涂层由羟基磷灰石（HAP）纳米颗粒组成，并在这些姜黄素分子上。在碱性条件下使用HAP原位沉淀进行GAC与HAP的包衣。然后将一层姜黄素分子附着在HAP涂层的顶部，以获得HAP-姜黄素双涂层GAC（HAP / C / GAC）。合成的HAP / GAC和HAP / C / GAC使用FT-IR光谱，扫描电子显微镜（SEM），粉末X射线衍射（PXRD）和热重分析（TGA）进行表征。表征表明，可以将针状HAP纳米粒子（宽50-100 nm，长约200-500 nm）固定并固定在GAC上，从而增强姜黄素在其上的附着力。然后使用革兰氏阴性（大肠杆菌）和革兰氏阳性（金黄色葡萄球菌）细菌研究纯GAC，HAP / GAC和HAP / C / GAC的抗菌特性。结果表明，HAP / C / GAC的抗菌性能明显高于HAP / GAC，而纯GAC的抗菌活性可忽略不计。

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