Abstract
The necessity of leachates treatment from the waste landfills by new ways becomes increasingly more marked. Leachates contain toxic ingredients such as pesticides, dyes, and hormonal agents, which necessarily need to be removed from the environment. It is because of their genotoxicity and estrogenic activity. The main aim of this article is to point out the possibility of using ultrasound in removing ammonia from hazardous landfills leachate. In addition to ultrasound degradation, the possibility of addition of the H2O2 was also studied. System ultrasound/H2O2 was proved to be more effective in removing ammonia and organic pollution than ultrasound alone. Tested leachate contains 3.20 g/dm3 N-NH4 +, 15 mg/dm3 CN−, and 4.4 g/dm3 chemical oxygen demand (COD). We achieved degradation efficiency of 63% of ammonia which means final concentration of 1.12 g/dm3 N-NH4 +, after using pretreatment with the most efficient system H2O2 and ultrasound. COD removal efficiency was 56% (1.95 g/dm3 COD). We achieved the value 10.2 mg/dm3 for cyanide, which means 65%.
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Acknowledgements
This research was conducted with support of the Slovak research and development agency under Contract No. APVV 037212 and the Science Grant Agency of the Slovak Ministry of Education (VEGA) Project Nos. 1/0631/15 and 1/0543/15.
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Tichý, J., Takáčová, A., Smolinská, M. et al. Treatment of hazardous leachate from landfill using ultrasound/H2O2 system. Monatsh Chem 148, 563–570 (2017). https://doi.org/10.1007/s00706-017-1919-7
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DOI: https://doi.org/10.1007/s00706-017-1919-7