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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Bouaid, A. Camara, C. Azmani, A. Agdi, K. Esteban, A. Martin Hernando, P. Fernandez |
| Copyright Year | 2000 |
| Abstract | A new viable remediation technique based on the use of diatomaceous earth is proposed to improve the ecological system. Its ability to remove atrazine and the four organophosphorus pesticides parathion-methyl, chlorpyriphos, fenamiphos and methidathion from river and waste waters has been proven. A series of experiments including variable conditions, such as temperature, pH, contact time, pesticide concentration and adsorbent quantity, were performed to demonstrate the efficiency of pesticide removal from three different water samples. The batch experiments showed that diatomaceous earth was able to remove 95% of chlorpyriphos, 75% of methidathion and parathion-methyl and 55% of atrazine and fenamiphos from all types of waters tested. The individual adsorption of each pesticide on diatomaceous earth could be described by the Freundlich isotherm and a tentative adsorption mechanism was proposed. The Freundlich coefficient (Kf) and Freundlich constant (1/n) appeared to be closely related to the physicochemical properties (Kow, solubility) of the compounds. The actual results support the conclusion that diatomaceous earth has the potential to serve as an extractant in remediation techniques. |
| Starting Page | 420 |
| Ending Page | 423 |
| Page Count | 4 |
| File Format | HTM / HTML PDF |
| ISSN | 14640325 |
| Volume Number | 2 |
| Issue Number | 5 |
| Journal | Journal of Environmental Monitoring |
| DOI | 10.1039/b004740f |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Freundlich Kow Diatomaceous earth Atrazine Organophosphorus compound Parathion methyl Fenamiphos Methidathion PH Pesticide Adsorption Extraction (chemistry) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law |
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