Sustainable electrocoagulation for lignin valorization: Green synthesis of magnetic mesoporous activated carbon from pulp and paper industry black liquor and its application as an adsorbent for methylene blue
{"title":"Sustainable electrocoagulation for lignin valorization: Green synthesis of magnetic mesoporous activated carbon from pulp and paper industry black liquor and its application as an adsorbent for methylene blue","authors":"Shoumik Sadaf , Seyed Morteza Taghavi Kouzehkanan , Tae-Sik Oh , Zhihua Jiang","doi":"10.1016/j.jwpe.2024.106392","DOIUrl":null,"url":null,"abstract":"<div><div>The separation and valorization of lignin from cellulosic biomass are critical yet challenging processes. Conventional methods like LignoBoost and LignoForce are energy-intensive and require high capital costs. In addition, they involve hazardous chemicals such as sulfuric acid, leading to SOx emissions. This study aims to develop a sustainable and environmentally friendly electrocoagulation process (EC) for lignin separation and valorization from black liquor in the pulp and paper industry. The EC achieved a 91 % lignin removal efficiency using iron electrodes, significantly higher than conventional methods. The separated lignin was carbonized to produce magnetic mesoporous activated carbon (MMAC) in a greener manner. The MMAC was systematically characterized using SEM, XRD, Raman, BET, and FTIR techniques, revealing a surface area of 125.37 m<sup>2</sup>/g and an average pore size of 6.59 nm. MMAC demonstrated high efficiency in adsorbing 91 % of Methylene Blue from dye solution within 30 min and maintained performance over four cycles, demonstrating the potential of EC in producing high-performance MMAC.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714424016246","RegionNum":2,"RegionCategory":"工程技术","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 separation and valorization of lignin from cellulosic biomass are critical yet challenging processes. Conventional methods like LignoBoost and LignoForce are energy-intensive and require high capital costs. In addition, they involve hazardous chemicals such as sulfuric acid, leading to SOx emissions. This study aims to develop a sustainable and environmentally friendly electrocoagulation process (EC) for lignin separation and valorization from black liquor in the pulp and paper industry. The EC achieved a 91 % lignin removal efficiency using iron electrodes, significantly higher than conventional methods. The separated lignin was carbonized to produce magnetic mesoporous activated carbon (MMAC) in a greener manner. The MMAC was systematically characterized using SEM, XRD, Raman, BET, and FTIR techniques, revealing a surface area of 125.37 m2/g and an average pore size of 6.59 nm. MMAC demonstrated high efficiency in adsorbing 91 % of Methylene Blue from dye solution within 30 min and maintained performance over four cycles, demonstrating the potential of EC in producing high-performance MMAC.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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