Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanism
Nowadays Nano technology is used as one of the alternative for removal of pollutants. In this study, raw sawdust was used as biomass and was pyrolyzed at high temperature in an inert environment. The synthesized char was finally coated with nano-silica in a Teflon coated hydrothermal reactor. The ch...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-03-01
|
| Series: | Waste Management Bulletin |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949750723000299 |
| _version_ | 1797237842328420352 |
|---|---|
| author | Papita Das Vijoyeta Chakraborty |
| author_facet | Papita Das Vijoyeta Chakraborty |
| author_sort | Papita Das |
| collection | DOAJ |
| description | Nowadays Nano technology is used as one of the alternative for removal of pollutants. In this study, raw sawdust was used as biomass and was pyrolyzed at high temperature in an inert environment. The synthesized char was finally coated with nano-silica in a Teflon coated hydrothermal reactor. The characterization of the synthesized composite was performed. Nano silica coated (AcSi) activated carbon was further used to reduce Cr+6 in three type of reactors (batch, fixed bed and fluidized bed reactor). With increased in concentration of Cr+6, the fluidization behaviour in case of Fluidized reactor and the breakthrough time in case of fixed bed reactor was decreasing. Reaction time and availability of the active surface group played an important role in both fixed and fluidised bed reactor and observed that biochar coated with nano-silica was capable to remove pollutants efficiently using all the reactor. The batch study suggested monolayer adsorption and exothermic reaction and maximum adsorption capacity was observed as 88.2 mg/g and removal was 99.8% after 120 min. Regeneration study suggested that the composite can be regenerated with alkali solution and upto 5 cycles this composite can be used. |
| first_indexed | 2024-04-24T17:26:10Z |
| format | Article |
| id | doaj.art-ab5e34d780ce441fb3844242c29c21e5 |
| institution | Directory Open Access Journal |
| issn | 2949-7507 |
| language | English |
| last_indexed | 2024-04-24T17:26:10Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Waste Management Bulletin |
| spelling | doaj.art-ab5e34d780ce441fb3844242c29c21e52024-03-28T06:40:22ZengElsevierWaste Management Bulletin2949-75072024-03-01146066Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanismPapita Das0Vijoyeta Chakraborty1Department of Chemical Engineering, Jadavpur University, India; School of Advanced Studies for Industrial Pollution Control Engineering, Jadavpur University, India, 700032, India; Corresponding author.Department of Chemical Engineering, Jadavpur University, IndiaNowadays Nano technology is used as one of the alternative for removal of pollutants. In this study, raw sawdust was used as biomass and was pyrolyzed at high temperature in an inert environment. The synthesized char was finally coated with nano-silica in a Teflon coated hydrothermal reactor. The characterization of the synthesized composite was performed. Nano silica coated (AcSi) activated carbon was further used to reduce Cr+6 in three type of reactors (batch, fixed bed and fluidized bed reactor). With increased in concentration of Cr+6, the fluidization behaviour in case of Fluidized reactor and the breakthrough time in case of fixed bed reactor was decreasing. Reaction time and availability of the active surface group played an important role in both fixed and fluidised bed reactor and observed that biochar coated with nano-silica was capable to remove pollutants efficiently using all the reactor. The batch study suggested monolayer adsorption and exothermic reaction and maximum adsorption capacity was observed as 88.2 mg/g and removal was 99.8% after 120 min. Regeneration study suggested that the composite can be regenerated with alkali solution and upto 5 cycles this composite can be used.http://www.sciencedirect.com/science/article/pii/S2949750723000299Fluidized bed reactorBiocharNano-silicaChromiumFixed bed reactor |
| spellingShingle | Papita Das Vijoyeta Chakraborty Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanism Waste Management Bulletin Fluidized bed reactor Biochar Nano-silica Chromium Fixed bed reactor |
| title | Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanism |
| title_full | Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanism |
| title_fullStr | Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanism |
| title_full_unstemmed | Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanism |
| title_short | Experimental study on removal of chromium using nano-silica coated pyrolysed biochar in batch, fixed bed and fluidized bed reactor: Synthesis, characterization, experimentation and mechanism |
| title_sort | experimental study on removal of chromium using nano silica coated pyrolysed biochar in batch fixed bed and fluidized bed reactor synthesis characterization experimentation and mechanism |
| topic | Fluidized bed reactor Biochar Nano-silica Chromium Fixed bed reactor |
| url | http://www.sciencedirect.com/science/article/pii/S2949750723000299 |
| work_keys_str_mv | AT papitadas experimentalstudyonremovalofchromiumusingnanosilicacoatedpyrolysedbiocharinbatchfixedbedandfluidizedbedreactorsynthesischaracterizationexperimentationandmechanism AT vijoyetachakraborty experimentalstudyonremovalofchromiumusingnanosilicacoatedpyrolysedbiocharinbatchfixedbedandfluidizedbedreactorsynthesischaracterizationexperimentationandmechanism |