Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from Water
Phosphates enter into water bodies mainly from non-point sources such as agriculture fields, which promote algal growth and cause eutrophication in lakes, wetlands, etc. Therefore, it is important to identify methods to reduce the level of phosphates in water bodies. In this work, we used kaolinite...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2012-06-01
|
| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.30.6.533 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841564491495505920 |
|---|---|
| author | Susmita Sen Gupta Krishna G. Bhattacharyya |
| author_facet | Susmita Sen Gupta Krishna G. Bhattacharyya |
| author_sort | Susmita Sen Gupta |
| collection | DOAJ |
| description | Phosphates enter into water bodies mainly from non-point sources such as agriculture fields, which promote algal growth and cause eutrophication in lakes, wetlands, etc. Therefore, it is important to identify methods to reduce the level of phosphates in water bodies. In this work, we used kaolinite and its calcined and acid-activated forms as adsorbents for removing phosphate from an aqueous medium under different conditions of pH, concentration, amount of adsorbent, time and temperature. Our results showed that weakly acidic pH (∼5.0) favoured the adsorption of phosphates, which attained equilibrium within 180 min. The interactions followed second-order kinetics. Our data fitted well with linear isotherm models. A part of the phosphate interacts chemically with kaolinite, while some amount may be weakly held. Experiments at 303, 313, 323 and 333 K showed that the interactions are exothermic, with decreasing entropy and Gibbs' energy. We found that acid-activated kaolinite had the highest adsorption capacity for phosphate. |
| format | Article |
| id | doaj-art-c6bab91a7fc9447995fa6178ba2aa30c |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2012-06-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-c6bab91a7fc9447995fa6178ba2aa30c2025-01-02T22:41:17ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382012-06-013010.1260/0263-6174.30.6.533Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from WaterSusmita Sen Gupta0Krishna G. Bhattacharyya1 Department of Chemistry, B N College, Dhubri 783324, Assam, India Department of Chemistry, Gauhati University, Guwahati 781014, Assam, IndiaPhosphates enter into water bodies mainly from non-point sources such as agriculture fields, which promote algal growth and cause eutrophication in lakes, wetlands, etc. Therefore, it is important to identify methods to reduce the level of phosphates in water bodies. In this work, we used kaolinite and its calcined and acid-activated forms as adsorbents for removing phosphate from an aqueous medium under different conditions of pH, concentration, amount of adsorbent, time and temperature. Our results showed that weakly acidic pH (∼5.0) favoured the adsorption of phosphates, which attained equilibrium within 180 min. The interactions followed second-order kinetics. Our data fitted well with linear isotherm models. A part of the phosphate interacts chemically with kaolinite, while some amount may be weakly held. Experiments at 303, 313, 323 and 333 K showed that the interactions are exothermic, with decreasing entropy and Gibbs' energy. We found that acid-activated kaolinite had the highest adsorption capacity for phosphate.https://doi.org/10.1260/0263-6174.30.6.533 |
| spellingShingle | Susmita Sen Gupta Krishna G. Bhattacharyya Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from Water Adsorption Science & Technology |
| title | Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from Water |
| title_full | Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from Water |
| title_fullStr | Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from Water |
| title_full_unstemmed | Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from Water |
| title_short | Using Aqueous Kaolinite Suspension as a Medium for Removing Phosphate from Water |
| title_sort | using aqueous kaolinite suspension as a medium for removing phosphate from water |
| url | https://doi.org/10.1260/0263-6174.30.6.533 |
| work_keys_str_mv | AT susmitasengupta usingaqueouskaolinitesuspensionasamediumforremovingphosphatefromwater AT krishnagbhattacharyya usingaqueouskaolinitesuspensionasamediumforremovingphosphatefromwater |