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| A novel technology for enhanced remediation of soils contaminated by PBDEs |
| IN Meng-fei, LI Jing, WANG Cui-ping, SUN Hong-wen |
| Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China |
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Abstract The main object in the present study was to establish the efficient technology for remediation of PBDEs contaminated soil using surfactants and nutrients enhanced tourmaline-catalyzed Fenton-like oxidation combined with microorganisms. Two kinds of nutrient salts including ammonium chloride and ammonium nitrate, and two types of surfactants such as Tween 80 and Triton 100, were selected to investigate effects of their different doses and types on the removal of PBDEs from soil and soil fungi. The results showed that high-dose nutrient promoted the degradation of PBDEs using tourmaline-catalyzed Fenton-like oxidation combined with microorganisms, and the removal efficiency was up to 75%. Both of surfactants could promote the degradation of PBDEs using tourmaline-catalyzed Fenton-like oxidation combined with microorganisms, and the degradation efficiency was up to 76%. For different individual BDEs, nutrients and surfactants could significantly enhance degradation of low brominated diphenyl ethers. Ammonium chloride was more beneficial to growth of soil microorganisms than ammonium nitrate, and high concentration of nutrients more obviously promoted growth of fungi in soil than their low concentration. TW-80 was more beneficial to microbial growth than TX-100, and lower concentration of surfactants was more effective in promoting fungal activities in soil. Therefore, the different types of nutrients and surfactants obviously enhanced the removal efficiency of PBDEs in soils using the technology of tourmaline-catalyzed Fenton-like oxidation combined with microorganisms.
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Received: 19 March 2017
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