{"title":"Microwave regeneration of biological activated carbon","authors":"Daoji Wu, Shujie Li, Ning Wang","doi":"10.1515/jaots-2016-0174","DOIUrl":null,"url":null,"abstract":"Abstract Spent biological activated carbon (SAC) in a drinking water treatment plant has been regenerated with microwaves, and the regeneration effects were evaluated through iodine values, surface chemistry, surface structure energy and surface morphology by comparison with unused activated carbon (UAC). On this basis, the performance of regenerated activated carbon (RAC) was investigated by methylene blue adsorption and raw water clarification. The results showed that the iodine value of RAC recovered to 98.1 % of that of UAC, and that the BET surface area of RAC (778 m2/g) was larger than that of SAC (749 m2/g). The pore structure of RAC was more regular than that of UAC, and the removal efficiency of RAC could achieve 90.7 % due to the formation of new micropores. Organic adsorption parameters of RAC fitted the Freundich isotherm better than those of UAC, and the R2 values for CODMn (chemical oxygen demand determined by KMnO4), DOC (dissolved organic carbon) and UV254 (absorbance value of the wastewater containing organic matter at ultraviolet light of 254 nm) were 0.902, 0.921 and 0.940, respectively.","PeriodicalId":14870,"journal":{"name":"Journal of Advanced Oxidation Technologies","volume":"26 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Advanced Oxidation Technologies","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/jaots-2016-0174","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q","JCRName":"Chemistry","Score":null,"Total":0}
引用次数: 6
Abstract
Abstract Spent biological activated carbon (SAC) in a drinking water treatment plant has been regenerated with microwaves, and the regeneration effects were evaluated through iodine values, surface chemistry, surface structure energy and surface morphology by comparison with unused activated carbon (UAC). On this basis, the performance of regenerated activated carbon (RAC) was investigated by methylene blue adsorption and raw water clarification. The results showed that the iodine value of RAC recovered to 98.1 % of that of UAC, and that the BET surface area of RAC (778 m2/g) was larger than that of SAC (749 m2/g). The pore structure of RAC was more regular than that of UAC, and the removal efficiency of RAC could achieve 90.7 % due to the formation of new micropores. Organic adsorption parameters of RAC fitted the Freundich isotherm better than those of UAC, and the R2 values for CODMn (chemical oxygen demand determined by KMnO4), DOC (dissolved organic carbon) and UV254 (absorbance value of the wastewater containing organic matter at ultraviolet light of 254 nm) were 0.902, 0.921 and 0.940, respectively.
期刊介绍：
The Journal of advanced oxidation technologies (AOTs) has been providing an international forum that accepts papers describing basic research and practical applications of these technologies. The Journal has been publishing articles in the form of critical reviews and research papers focused on the science and engineering of AOTs for water, air and soil treatment. Due to the enormous progress in the applications of various chemical and bio-oxidation and reduction processes, the scope of the Journal is now expanded to include submission in these areas so that high quality submission from industry would also be considered for publication. Specifically, the Journal is soliciting submission in the following areas (alphabetical order): -Advanced Oxidation Nanotechnologies -Bio-Oxidation and Reduction Processes -Catalytic Oxidation -Chemical Oxidation and Reduction Processes -Electrochemical Oxidation -Electrohydraulic Discharge, Cavitation & Sonolysis -Electron Beam & Gamma Irradiation -New Photocatalytic Materials and processes -Non-Thermal Plasma -Ozone-based AOTs -Photochemical Degradation Processes -Sub- and Supercritical Water Oxidation -TiO2 Photocatalytic Redox Processes -UV- and Solar Light-based AOTs -Water-Energy (and Food) Nexus of AOTs
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