Novel synthesis of GG-g-PAN based hydrolyzed products exclusion of congo red and methylene blue dyes undertaken aqueous medium for spectroscopic investigations

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2024-10-29 DOI:10.1016/j.molliq.2024.126346

Ishika Pal , Lalita Chopra , Sasireka Rajendran , P. Lalitha , Kaushik Pal , Nidhi Asthana , María Gabriela Paraje

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Abstract

Untreated industrial waste discharged to the surrounding water streams comprises of harmful contaminants which can harm the environment. In this work, GG-g-PAN and hydrolyzed grafted copolymers were tested for their ability to remove Congo-red (CR) and methylene blue (MB) dyes from water. GG was modified through graft copolymerization of acrylonitrile (AN) and subsequent hydrolysis to attain the GG-g-2HPAN and GG-g-4HPAN respectively. Physico-chemical changes and surface morphology were elucidated by x-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution scanning electron microscopy (HR-TEM), thermogravimetric analysis (TGA), energy dispersive x-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and swelling. In relation to different process variables, the adsorption capacity for CR and MB dyes was investigated and modelled using suitable adsorption isotherms and kinetic models. The highest adsorption capacity exhibited by GG-g-4HPAN was 81% for congo red and 94.31% for methylene blue dye. The Langmuir isotherm, pseudo-second-order KM, Boyd’s KM, Elovich KM and WM IPD model were the best-fitted models for the adsorption equilibria and kinetic data respectively. Reusability studies were carried out for four consecutive cycles to comprehend environmental sustainability.

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基于 GG-g-PAN 的水解产物的新型合成方法，排除水介质中的刚果红和亚甲基蓝染料，用于光谱研究

未经处理的工业废物排放到周围的水流中，其中的有害污染物会对环境造成危害。本研究测试了 GG-g-PAN 和水解接枝共聚物去除水中刚果红（CR）和亚甲基蓝（MB）染料的能力。通过丙烯腈（AN）接枝共聚改性 GG，然后进行水解，分别得到 GG-g-2HPAN 和 GG-g-4HPAN。通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、高分辨率扫描电子显微镜 (HR-TEM)、热重分析 (TGA)、能量色散 X 射线光谱 (EDS)、傅立叶变换红外光谱 (FTIR) 和溶胀等方法阐明了物理化学变化和表面形貌。针对不同的工艺变量，研究了 CR 和 MB 染料的吸附容量，并使用合适的吸附等温线和动力学模型进行了建模。GG-g-4HPAN 对刚果红和亚甲基蓝染料的最高吸附容量分别为 81% 和 94.31%。朗缪尔等温线、伪二阶 KM、Boyd's KM、Elovich KM 和 WM IPD 模型分别是吸附平衡和动力学数据的最佳拟合模型。为了解环境的可持续性，连续进行了四个周期的可重复使用性研究。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.