Cellulose -Polyvinylalcohol supported magnetic nanocomposites from lentil husk for sequestration of cationic dyes from the aqueous solution: Kinetics, isotherm and reusability studies.
{"title":"Cellulose -Polyvinylalcohol supported magnetic nanocomposites from lentil husk for sequestration of cationic dyes from the aqueous solution: Kinetics, isotherm and reusability studies.","authors":"Afsana Khatoon, Shaziya Siddiqui, Nazrul Haq","doi":"10.1016/j.jconhyd.2025.104503","DOIUrl":null,"url":null,"abstract":"<p><p>The study emphasize on the synthesis of eco-friendly cellulose based magnetic nanocomposite derived from Lens cullnaris husk and Poly Vinyl Alcohol (Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA) for the adsorption of Crystal Violet, Methylene Blue and Malachite Green Dye. The structural and functional morphology was determined by SEM-EDAX analysis and FTIR. The crystalline of Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA was analyzed by XRD and pore size was determined by BET. The surface area of nanocellulose Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA was found to be 22.308 m<sup>2</sup>/g and the pore volume of 0.074cm<sup>3</sup>/g. The Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA nanocomposites show successful adsorption of CV, MB and MG in 120 min equilibrium time at pH 7 for CV and 8 for MB and MG respectively. The Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA nanocomposites was best fitted Langmuir isotherm and follows pseudo 2nd order kinetics with intra particle as rate controlling mechanism. The nanocellulose Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA composite shows good monolayer adsorption capacity in the order of CV(357 mg/g) > MB(112.35 mg/g) > MG(111.11 mg/g). Thermodynamic study reveals the process is endothermic and spontaneous in nature with ΔG<sup>0</sup> value less than 20KJ mol<sup>-1</sup> at respective temperatures indicating Physiosorption. The nano-cellulose Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA composite can be effectively desorb dyes by 0.1 M NaOH. The nanocellulose Fe<sub>3</sub>O<sub>4</sub>@LENT/PVA composite proves to be an effective adsorbent showing regeneration ability upto five times for all the dyes.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104503"},"PeriodicalIF":3.5000,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of contaminant hydrology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jconhyd.2025.104503","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
The study emphasize on the synthesis of eco-friendly cellulose based magnetic nanocomposite derived from Lens cullnaris husk and Poly Vinyl Alcohol (Fe3O4@LENT/PVA) for the adsorption of Crystal Violet, Methylene Blue and Malachite Green Dye. The structural and functional morphology was determined by SEM-EDAX analysis and FTIR. The crystalline of Fe3O4@LENT/PVA was analyzed by XRD and pore size was determined by BET. The surface area of nanocellulose Fe3O4@LENT/PVA was found to be 22.308 m2/g and the pore volume of 0.074cm3/g. The Fe3O4@LENT/PVA nanocomposites show successful adsorption of CV, MB and MG in 120 min equilibrium time at pH 7 for CV and 8 for MB and MG respectively. The Fe3O4@LENT/PVA nanocomposites was best fitted Langmuir isotherm and follows pseudo 2nd order kinetics with intra particle as rate controlling mechanism. The nanocellulose Fe3O4@LENT/PVA composite shows good monolayer adsorption capacity in the order of CV(357 mg/g) > MB(112.35 mg/g) > MG(111.11 mg/g). Thermodynamic study reveals the process is endothermic and spontaneous in nature with ΔG0 value less than 20KJ mol-1 at respective temperatures indicating Physiosorption. The nano-cellulose Fe3O4@LENT/PVA composite can be effectively desorb dyes by 0.1 M NaOH. The nanocellulose Fe3O4@LENT/PVA composite proves to be an effective adsorbent showing regeneration ability upto five times for all the dyes.
期刊介绍：
The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide).
The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
