Remediation of Methyl Red Dye from Aqueous Solutions by Using Biosorbents Developed from Floral Waste

A. Amari, V. Yadav, S. K. Pathan, Bijendra Singh, H. Osman, N. Choudhary, K. M. Khedher, Anup Basnet
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引用次数: 7

Abstract

The disposal of biological waste into water bodies is a major global concern as it leads to water pollution resulting in the loss of plenty of revenue in the cleaning of water bodies. Here, in the present research work, sacred flowers were collected, segregated, sun-dried, and powdered. The dried floral powders (marigold and rose) were characterized by field emission scanning electron microscopy (FESEM), electron diffraction spectroscopy (EDS), Fourier transforms infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The microscopy revealed the irregular spherical shape of the sheet-like structure whose size varies in microns. The EDS revealed the elemental composition which was dominated by mainly carbon and oxygen. The XRD shows the presence of carbon (10-25ɵ) in the amorphous form and the absence of any crystalline phase in the biosorbents. The FT-IR showed peaks that conformed to the presence of functional groups like -OH and a carbonyl group. The dried powders were used as an economical and eco-friendly biosorbent for the removal of methyl red (MR) dye from the aqueous solutions by batch adsorption study. After 60 minutes of contact time, the marigold powder (MGP) and rose petal powder (RPP) showed decolorization of 61.16% and 56.08% for 2 ppm of MR dye. The kinetic revealed that the dye removal reaction does not follow the pseudo-first-order as well as the pseudo-second-order. The utilization of such waste-based biosorbents will minimize solid waste and also will provide an economical biosorbent for the removal of environmental pollutants.
花卉废弃物生物吸附剂对甲基红染料的修复研究
生物废物进入水体的处置是全球关注的一个主要问题,因为它导致水污染,从而损失了大量清理水体的收入。在这里,在目前的研究工作中,圣花被收集、分离、晒干和粉末。采用场发射扫描电镜(FESEM)、电子衍射光谱(EDS)、傅里叶变换红外光谱(FT-IR)和x射线衍射(XRD)对金盏花和玫瑰干粉进行了表征。显微镜下显示出不规则的片状球形结构,其大小以微米为单位。能谱分析显示其元素组成以碳和氧为主。XRD分析表明,生物吸附剂中存在非晶态碳(10-25),不存在晶体相。傅里叶变换红外光谱(FT-IR)显示了与-OH和羰基等官能团的存在相一致的峰。采用该干粉作为一种经济环保的生物吸附剂,对甲基红(MR)染料进行了间歇吸附研究。当MR染料浓度为2 ppm时,接触时间为60 min,万寿菊粉(MGP)和玫瑰花瓣粉(RPP)的脱色率分别为61.16%和56.08%。动力学结果表明,该脱染反应既不符合准一级反应,也不符合准二级反应。利用这种基于废物的生物吸附剂将最大限度地减少固体废物,也将为去除环境污染物提供经济的生物吸附剂。
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