Comparison between removal of Ethidium bromide and eosin by synthesized manganese (II) doped zinc (II) sulphide nanopart
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RESEARCH ARTICLE
Comparison between removal of Ethidium bromide and eosin by synthesized manganese (II) doped zinc (II) sulphide nanoparticles: kinetic, isotherms and thermodynamic studies Saruchi 1 & Rashim Verma 2 & Vaneet Kumar 1 & Asma A. ALOthman 3 Received: 27 May 2019 / Accepted: 7 September 2020 # Springer Nature Switzerland AG 2020
Abstract The present work seeks to investigate the kinetics and thermodynamic studies of ethidium bromide (EtBr) and eosin adsorption onto the synthesized Manganese (II) doped Zinc (II) Sulphide nanoparticles. A convenient scheme of co-precipitation was used for the synthesis of Manganese (II) doped Zinc (II) Sulphide nanoparticles. The Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM) and X-ray diffractogram (XRD) techniques were used for the characterization of synthesized nanoparticles. The adsorption study was undertaken in a systematic manner. Effects of different experimental parameters were studied using batch adsorption method. It was evident from the results that EtBr and eosin removal was inversely proportional to the concentration of initial dye and directly proportional to contact time and adsorbent used. To study the adsorption equilibrium three different isotherm models like Langmuir, Freundlich and Flory-Huggins were used. It was observed that adsorption data synced most successfully with Langmuir isotherm model as compared to Freundlich and FloryHuggins isotherm model. To fit the investigational statistics, the kinetic models pseudo 1st order, pseudo 2nd order and intra particle diffusion were taken onto consideration. The maximum dye removal of 98.19% and 97.16% for EtBr and eosin, was observed during the synthesis of nanoparticles. Keywords Zinc (II) sulphide nanoparticles . Ethidium bromide . Eosin . Adsorption . Kinetic
Introduction Dyes are widely used in plethora of industries like textile, paints, leather, paper etc. These dyes, are mostly released as an unprocessed waste. Such releases damages the environment and ecosystem in numberless ways, by directly or indirectly contaminating the soil and water, thus adversely affecting all the forms of life. As is evident, most textile companies in developing countries are sited in rural areas, where waste water of the dyes is directly disposed into the municipal sewage system. There are numerous dyes used for the industrial and experimental * Saruchi [email protected] 1
Department of Biotechnology, CT Group of Institutions, Shahpur Campus, Jalandhar, Punjab, India
2
Department of Biotechnology, DAV University, Jalandhar, India
3
Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
purposes such as methylene blue, Eosin blue, EtBr, crystal violet, etc. [7, 8, 10, 36, 39, 40, 46]. Nanoparticles (NPs) are significant scientific tools that are being exploited in environmental, biotechnological and pharmacological sectors. NPs have countless magnetic, electronic, optical and chemical properties which are being used in
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