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首页> 美国卫生研究院文献>BMC Chemistry >Synthesis of multifunctional activated carbon nanocomposite comprising biocompatible flake nano hydroxyapatite and natural turmeric extract for the removal of bacteria and lead ions from aqueous solution
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Synthesis of multifunctional activated carbon nanocomposite comprising biocompatible flake nano hydroxyapatite and natural turmeric extract for the removal of bacteria and lead ions from aqueous solution

机译：包含生物相容性片状纳米羟基磷灰石和天然姜黄提取物的多功能活性炭纳米复合材料的合成用于去除水溶液中的细菌和铅离子

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Clean water, which is free from pathogens and toxic chemicals, is vital to human health. The blue planet is encountering remarkable challenges in meeting the ever-increasing demands of clean water. The intention of this research study was to develop a water filter material that is capable of removing bacterial contaminants and heavy metals from fresh water using cost effective and easily fabricated biocompatible filter material. For this purpose, granular activated carbon (GAC) was coated with both hydroxyapatite (HAP) nanoflakes and turmeric extract (TE) (HAP/TE/GAC) which had been extracted from natural turmeric powder. In addition, GAC was coated only with HAP nanoflakes to synthesize HAP coated GAC (HAP/GAC) composite. Prepared HAP/GAC and HAP/TE/GAC were characterized using Fourier-transform infrared spectroscopy, X-ray diffractometry, scanning electron microscopy and UV–visible spectrophotometry. Antibacterial effect of the prepared nanocomposites, HAP/GAC and HAP/TE/GAC was compared with neat GAC using Gram-negative bacteria Escherichia coli. Results showed that antibacterial studies of the synthesized nanocomposites exhibit effective antibacterial activity against E. coli compared with neat GAC alone. However, the composite HAP/TE/GAC revealed better activity than HAP/GAC. Heavy metal adsorption ability of the synthesized composites was carried out using Pb2+ ions at room temperature at different time intervals and different pH levels. The equilibrium adsorption data were assessed via Langmuir and Freundlich adsorption isotherm models for neat GAC, HAP/GAC and HAP/TE/GAC at pH 6. The equilibrium adsorption data for GAC, HAP/GAC and HAP/TE/GAC were well fitted with both Freundlich and Langmuir isotherm models in the given Pb2+ concentrations. The HAP/TE/GAC composite is capable of maintaining the natural function of GAC in addition to removal of bacterial contaminants and heavy metals, which can be used as a point-of-use water filter material.Electronic supplementary materialThe online version of this article (10.1186/s13065-018-0384-7) contains supplementary material, which is available to authorized users.
机译：不含病原体和有毒化学物质的清洁水对人类健康至关重要。在满足不断增长的清洁水需求方面，蓝色星球正面临巨大挑战。这项研究的目的是开发一种水过滤器材料，它能够使用经济高效且易于制造的生物相容性过滤器材料从淡水中去除细菌污染物和重金属。为此，颗粒状活性炭（GAC）涂有羟基磷灰石（HAP）纳米片和从天然姜黄粉中提取的姜黄提取物（TE）（HAP / TE / GAC）。此外，GAC仅用HAP纳米薄片涂覆，以合成HAP涂覆的GAC（HAP / GAC）复合材料。制备的HAP / GAC和HAP / TE / GAC使用傅里叶变换红外光谱，X射线衍射，扫描电子显微镜和紫外可见分光光度法进行表征。使用革兰氏阴性细菌大肠杆菌将制备的纳米复合材料HAP / GAC和HAP / TE / GAC的抗菌效果与纯GAC进行了比较。结果表明，与单独的纯GAC相比，合成的纳米复合材料的抗菌研究显示出对大肠杆菌的有效抗菌活性。但是，复合HAP / TE / GAC的活性优于HAP / GAC。利用Pb 2 + 离子在室温下以不同的时间间隔和不同的pH值对合成的复合材料进行重金属吸附。通过Langmuir和Freundlich吸附等温线模型对pH为6的纯GAC，HAP / GAC和HAP / TE / GAC的平衡吸附数据进行了评估.GAC，HAP / GAC和HAP / TE / GAC的平衡吸附数据与给定的Pb 2 + 浓度下的Freundlich和Langmuir等温线模型。 HAP / TE / GAC复合材料除去除细菌污染物和重金属外还能够保持GAC的天然功能，这些细菌和重金属可用作使用点的滤水材料。电子补充材料本文的在线版本（10.1186 / s13065-018-0384-7）包含补充材料，授权用户可以使用。

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