{"title":"Effective adsorption performance and mechanism of methylene blue from dye wastewater by humic acid sucrose-modified red mud","authors":"","doi":"10.1016/j.psep.2024.09.047","DOIUrl":null,"url":null,"abstract":"<div><p>The release control of organic dye pollutants has become a global issue, and improper disposal of red mud(RM) can also cause environmental pollution. In this paper, a novel composite material, RM-SC-HA, was prepared to adsorb MB (methylene blue) from dye wastewater by co-hydrothermal treatment using RM, sucrose, and humic acid as raw materials. RM-SC-HA is simple to prepare and has better adsorption of MB in dye wastewater. The results supported the proposed secondary (R<sup>2</sup> = 0.99) kinetic model, which states that chemisorption is the primary form of adsorption. The maximum amount of adsorption, which was achieved by Langmuir's isothermal model, was 417.12 mg/g. In addition, the adsorption mechanism can be attributed to the role of electrostatic interactions, hydrogen bonding, π-π stacking and void diffusion. When RM-SC-HA was used to treat simulated industrial wastewater samples, the removal rate was also maintained at a high level(About 90 %). In addition, RM-SC-HA has good magnetic properties and reusability. Its magnetic properties (saturation magnetization value of 2.49 emu/g) make it easy to separate from water under an applied magnetic field. The present study provides an efficient novel MB adsorbent and promotes the practical application of modified RM composites in water purification.</p></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":null,"pages":null},"PeriodicalIF":6.9000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Process Safety and Environmental Protection","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S095758202401187X","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The release control of organic dye pollutants has become a global issue, and improper disposal of red mud(RM) can also cause environmental pollution. In this paper, a novel composite material, RM-SC-HA, was prepared to adsorb MB (methylene blue) from dye wastewater by co-hydrothermal treatment using RM, sucrose, and humic acid as raw materials. RM-SC-HA is simple to prepare and has better adsorption of MB in dye wastewater. The results supported the proposed secondary (R2 = 0.99) kinetic model, which states that chemisorption is the primary form of adsorption. The maximum amount of adsorption, which was achieved by Langmuir's isothermal model, was 417.12 mg/g. In addition, the adsorption mechanism can be attributed to the role of electrostatic interactions, hydrogen bonding, π-π stacking and void diffusion. When RM-SC-HA was used to treat simulated industrial wastewater samples, the removal rate was also maintained at a high level(About 90 %). In addition, RM-SC-HA has good magnetic properties and reusability. Its magnetic properties (saturation magnetization value of 2.49 emu/g) make it easy to separate from water under an applied magnetic field. The present study provides an efficient novel MB adsorbent and promotes the practical application of modified RM composites in water purification.
期刊介绍:
The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice.
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