Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator
This work investigated groundwater iron adsorption capacity from rice husk, rice straw, water hyacinth and coconut shell, agricultural residues commonly found in Thailand. This study also investigated the adsorption behavior using an appropriate isotherm model in the batch process. The process was c...
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| Format: | Article |
| Language: | English |
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Mahidol University
2019-04-01
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| Series: | Environment and Natural Resources Journal |
| Subjects: | |
| Online Access: | https://www.tci-thaijo.org/index.php/ennrj/article/view/182110 |
| _version_ | 1819227844026302464 |
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| author | Thanakrit Neamhom |
| author_facet | Thanakrit Neamhom |
| author_sort | Thanakrit Neamhom |
| collection | DOAJ |
| description | This work investigated groundwater iron adsorption capacity from rice husk, rice straw, water hyacinth and coconut shell, agricultural residues commonly found in Thailand. This study also investigated the adsorption behavior using an appropriate isotherm model in the batch process. The process was conducted using a modified airlift tray aerator. The use of a single adsorbent plate in a modified aerator obtained a removal capacity in the range of 0.3 to 0.9 mg/L, but the final iron concentration in the sample was above the regulatory standard. To increase the efficiency using the equivalent condition, the multiple adsorbent plate system was tested. The application of four rice husk plates achieved the allowance value and resulted in a final iron concentration of 0.28 mg/L. Based on the results, iron was reduced by increasing the number of adsorbent plates. Hence, rice husk can be sustainably used to adsorb iron in groundwater. At equilibrium, the adsorption isotherm was fitted to the Freundlich equation with an R2 value of 0.9805. This implied that the adsorption sites on the rice husk surface are heterogeneous in nature and presented a strong interaction between iron and rice husk. They revealed a maximum adsorption capacity of 0.73 mg/g. Moreover, this practice also decreased the amount of total hardness which could help alleviate nuisance and public health problems. |
| first_indexed | 2024-12-23T10:47:50Z |
| format | Article |
| id | doaj.art-203cc01ea0fd447298966e531942f9f5 |
| institution | Directory Open Access Journal |
| issn | 1686-5456 2408-2384 |
| language | English |
| last_indexed | 2024-12-23T10:47:50Z |
| publishDate | 2019-04-01 |
| publisher | Mahidol University |
| record_format | Article |
| series | Environment and Natural Resources Journal |
| spelling | doaj.art-203cc01ea0fd447298966e531942f9f52022-12-21T17:49:58ZengMahidol UniversityEnvironment and Natural Resources Journal1686-54562408-23842019-04-01173586710.32526/ennrj.17.3.2019.23Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift AeratorThanakrit Neamhom0Department of Environmental Health Science, Faculty of Public Health, Mahidol University, Bangkok 10400, ThailandThis work investigated groundwater iron adsorption capacity from rice husk, rice straw, water hyacinth and coconut shell, agricultural residues commonly found in Thailand. This study also investigated the adsorption behavior using an appropriate isotherm model in the batch process. The process was conducted using a modified airlift tray aerator. The use of a single adsorbent plate in a modified aerator obtained a removal capacity in the range of 0.3 to 0.9 mg/L, but the final iron concentration in the sample was above the regulatory standard. To increase the efficiency using the equivalent condition, the multiple adsorbent plate system was tested. The application of four rice husk plates achieved the allowance value and resulted in a final iron concentration of 0.28 mg/L. Based on the results, iron was reduced by increasing the number of adsorbent plates. Hence, rice husk can be sustainably used to adsorb iron in groundwater. At equilibrium, the adsorption isotherm was fitted to the Freundlich equation with an R2 value of 0.9805. This implied that the adsorption sites on the rice husk surface are heterogeneous in nature and presented a strong interaction between iron and rice husk. They revealed a maximum adsorption capacity of 0.73 mg/g. Moreover, this practice also decreased the amount of total hardness which could help alleviate nuisance and public health problems.https://www.tci-thaijo.org/index.php/ennrj/article/view/182110Agricultural residueIron removalGroundwaterAirlift tray aeratorAdsorption |
| spellingShingle | Thanakrit Neamhom Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator Environment and Natural Resources Journal Agricultural residue Iron removal Groundwater Airlift tray aerator Adsorption |
| title | Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator |
| title_full | Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator |
| title_fullStr | Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator |
| title_full_unstemmed | Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator |
| title_short | Use of Agricultural Residues to Remove Iron from Groundwater in Modified Airlift Aerator |
| title_sort | use of agricultural residues to remove iron from groundwater in modified airlift aerator |
| topic | Agricultural residue Iron removal Groundwater Airlift tray aerator Adsorption |
| url | https://www.tci-thaijo.org/index.php/ennrj/article/view/182110 |
| work_keys_str_mv | AT thanakritneamhom useofagriculturalresiduestoremoveironfromgroundwaterinmodifiedairliftaerator |