绿色合成还原性氧化石墨烯吸附剂对环境废水中阳离子染料的吸附动力学、等温线和热力学研究

IF 1.7 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Bapan Bairy, Piu Das, Kartik Tantubay, Moni Baskey (Sen)
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引用次数: 0

摘要

废水中产生的合成染料会给我们的社会带来危险的环境,因此有必要从水体中去除这些染料分子,因为它们对生物具有毒性。在我们的研究中,使用Averrhoa杨桃果实提取物进行了一种简单的一锅合成工艺来合成还原氧化石墨烯(RGO)。为了证实RGO的形成,研究了不同的表征技术,如傅里叶变换红外光谱(FTIR)、紫外-可见光谱和X射线衍射(XRD)。透射电子显微镜(TEM)和扫描电子显微镜(SEM)用于了解RGO的形态。对两种染料的拟一阶和拟二阶吸附动力学进行了研究。Freundlich和Langmuir吸附等温线模型被证实可以描述每种具有高相关系数的吸附能力响应。RGO对亚甲基蓝(MB)和结晶紫(CV)的最大吸附量分别为52.308 mg g−1和31.466 mg g−1。该吸附剂的吸附能力通过随后五个循环中的可回收性来监测,并且观察到,多达5个循环,吸附能力没有显著降低。本研究表明,RGO对环境水体中的MB和CV染料具有很高的去除效率。对MB和CV染料在RGO片上的吸附现象进行了热力学研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adsorption kinetics, isotherm and thermodynamics studies for the removal of cationic dyes from environmental wastewater by reduced graphene oxide adsorbent synthesized via greener way
Synthetic dyes emerging from wastewater effluents result in a hazardous environment to our society, hence removal of these dye molecules from the water bodies is necessary due to their toxic nature for living beings. In our study, a straightforward one pot synthetic process is conducted to synthesize reduced graphene oxide (RGO) using Averrhoa carambola fruit extract. To confirm the formation of RGO, different characterization techniques such as Fourier transform infrared spectroscopy (FTIR), UV–Vis spectroscopy and X-Ray Diffraction (XRD) are investigated. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) are used to understand the morphology of RGO. Adsorption kinetics for pseudo-first order and pseudo-second order has been carried out for both dyes. Freundlich and Langmuir adsorption isotherm models were confirmed to describe each of the adsorption ability responses with high correlation coefficients. Maximum adsorption capacities of methylene blue (MB) and crystal violet (CV) on RGO were 52.308 mg g−1 and 31.466 mg g−1 respectively. The adsorption ability of this adsorbent is monitored by recyclability in five subsequent cycles and it is observed that up to 5 cycles, there is no significant decrease in adsorption capability. The present study showed that RGO is highly efficient in removing MB and CV dyes from environmental water bodies. The thermodynamics study for the adsorption phenomena of MB and CV dyes on RGO sheet has been investigated.
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来源期刊
Advances in Natural Sciences: Nanoscience and Nanotechnology
Advances in Natural Sciences: Nanoscience and Nanotechnology NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
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