Bioremediation of benzene from groundwater by calcium peroxide (CaO2) nanoparticles encapsulated in sodium alginate
| Autor: | Seyed Mohamad Mehdi Dastgheib, Saeideh Tasharrofi, Ebrahim Alaie, Mahmoud Shavandi, Hamid Mosmeri |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
021110 strategic
defence & security studies education.field_of_study Environmental remediation General Chemical Engineering Population 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology General Chemistry 010501 environmental sciences 01 natural sciences Oxygen chemistry.chemical_compound Bioremediation chemistry Calcium peroxide Environmental chemistry education Benzene Effluent Groundwater 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Journal of the Taiwan Institute of Chemical Engineers. 78:299-306 |
| ISSN: | 1876-1070 |
| DOI: | 10.1016/j.jtice.2017.06.020 |
| Popis: | This study was conducted through batch and column experiments for remediation of benzene from groundwater (50 mg/L) by encapsulated calcium peroxide (CaO2) nanoparticles and FeSO4. The results showed complete benzene removal by CaO2 capsules within 60 days, whereas, addition of FeSO4 capsules to the batch tests removed 100% of pollution after 70 days. Furthermore, the initial temperature and pH of the groundwater showed significant impacts on the remediation process. Results indicated that benzene was removed more efficiently by addition of FeSO4 and CaO2 capsules in modified Fenton (MF) reaction at lower pH (3). However, raising the pH resulted in better stimulation of microbial population due to more oxygen generation from CaO2 capsules. In addition, results revealed that CaO2 capsules are able to perform effectively for pollution bioremediation at 30 °C and at lower temperatures MF reaction is performed ideally. In column experiments, MF reaction showed higher capability for benzene remediation from the effluent (100% removal after 4 days) and CaO2 capsules were successfully exploited for comprehensive treatment of the groundwater after 30 days. Results indicated that MF reaction was more potent than only CaO2 capsules for benzene removal from groundwater. Present investigation provides a considerable insight into application of CaO2 nanoparticles as reactive barriers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect