Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water
Porous carbons are well-known efficient adsorbents for a variety of organic and inorganic pollutants; however, they have difficulty in virus removal. In this study, novel porous carbons (NPCs) (NPC-A, NPC-B, and NPC-C) derived from rice husks were compared with commercially available activated carbo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/9/1280 |
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| author | Vu Duc Canh Seiichiro Tabata Shun Yamanoi Yoichi Onaka Toshiyuki Yokoi Hiroaki Furumai Hiroyuki Katayama |
| author_facet | Vu Duc Canh Seiichiro Tabata Shun Yamanoi Yoichi Onaka Toshiyuki Yokoi Hiroaki Furumai Hiroyuki Katayama |
| author_sort | Vu Duc Canh |
| collection | DOAJ |
| description | Porous carbons are well-known efficient adsorbents for a variety of organic and inorganic pollutants; however, they have difficulty in virus removal. In this study, novel porous carbons (NPCs) (NPC-A, NPC-B, and NPC-C) derived from rice husks were compared with commercially available activated carbons (ACs) for their ability to remove MS2 bacteriophages (MS2) in a batch experiment. NPC-A was produced by the silica removal process. NPC-B was prepared with an additional steam activation applied to NPC-A. NPC-C was obtained with an additional acid rinse applied to NPC-B. The NPCs (particularly NPC-C) exhibited effective removal of up to 5.3 log<sub>10</sub> of MS2, which was greater than that of less than 2.7 log<sub>10</sub> obtained by other ACs under 10 g/L during the same contact time (60 min). The pore size distribution of the porous carbon adsorbents was found to influence their virus removal performance. The adsorbents with a larger proportion of pores ranging from 200–4500 nm in diameter were able to achieve higher virus removal rates. Thus, NPCs (particularly NPC-C), which had a larger volume of pores ranging from 200–4500 nm in size, demonstrated the potential for use as efficient adsorbents for removing viruses during water purification. |
| first_indexed | 2024-03-10T11:46:48Z |
| format | Article |
| id | doaj.art-f9d9f12febd9426296f168a5e82a73bb |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T11:46:48Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-f9d9f12febd9426296f168a5e82a73bb2023-11-21T18:03:09ZengMDPI AGWater2073-44412021-04-01139128010.3390/w13091280Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in WaterVu Duc Canh0Seiichiro Tabata1Shun Yamanoi2Yoichi Onaka3Toshiyuki Yokoi4Hiroaki Furumai5Hiroyuki Katayama6Department of Urban Engineering, Graduate School of Engineering, University of Tokyo, Tokyo 113-8656, JapanIP Incubation & Investment Department, Intellectual Property Division, Sony Group Corporation, Tokyo 108-0075, JapanIP Incubation & Investment Department, Intellectual Property Division, Sony Group Corporation, Tokyo 108-0075, JapanActivated Carbon Business Department, Osaka Gas Chemicals Co., Ltd., Osaka 550-0023, JapanInstitute of Innovative Research, Tokyo Institute of Technology, Tokyo 152-8550, JapanResearch Center for Water Environment Technology, Graduate School of Engineering, University of Tokyo, Tokyo 113-8656, JapanDepartment of Urban Engineering, Graduate School of Engineering, University of Tokyo, Tokyo 113-8656, JapanPorous carbons are well-known efficient adsorbents for a variety of organic and inorganic pollutants; however, they have difficulty in virus removal. In this study, novel porous carbons (NPCs) (NPC-A, NPC-B, and NPC-C) derived from rice husks were compared with commercially available activated carbons (ACs) for their ability to remove MS2 bacteriophages (MS2) in a batch experiment. NPC-A was produced by the silica removal process. NPC-B was prepared with an additional steam activation applied to NPC-A. NPC-C was obtained with an additional acid rinse applied to NPC-B. The NPCs (particularly NPC-C) exhibited effective removal of up to 5.3 log<sub>10</sub> of MS2, which was greater than that of less than 2.7 log<sub>10</sub> obtained by other ACs under 10 g/L during the same contact time (60 min). The pore size distribution of the porous carbon adsorbents was found to influence their virus removal performance. The adsorbents with a larger proportion of pores ranging from 200–4500 nm in diameter were able to achieve higher virus removal rates. Thus, NPCs (particularly NPC-C), which had a larger volume of pores ranging from 200–4500 nm in size, demonstrated the potential for use as efficient adsorbents for removing viruses during water purification.https://www.mdpi.com/2073-4441/13/9/1280virus removaldrinking water treatmentporous carbon adsorbentspore size distribution |
| spellingShingle | Vu Duc Canh Seiichiro Tabata Shun Yamanoi Yoichi Onaka Toshiyuki Yokoi Hiroaki Furumai Hiroyuki Katayama Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water Water virus removal drinking water treatment porous carbon adsorbents pore size distribution |
| title | Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water |
| title_full | Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water |
| title_fullStr | Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water |
| title_full_unstemmed | Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water |
| title_short | Evaluation of Porous Carbon Adsorbents Made from Rice Husks for Virus Removal in Water |
| title_sort | evaluation of porous carbon adsorbents made from rice husks for virus removal in water |
| topic | virus removal drinking water treatment porous carbon adsorbents pore size distribution |
| url | https://www.mdpi.com/2073-4441/13/9/1280 |
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