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Author Fu, Dengqiang ♦ Teng, Ying ♦ Luo, Yongming ♦ Tu, Chen ♦ Li, Shixing ♦ Li, Zhengao ♦ Christie, Peter
Source Paperity
Content type Text
Publisher Springer Berlin Heidelberg
File Format PDF ♦ HTM / HTML
Copyright Year ©2012
Subject Keyword Environment ♦ Environmental chemistry ♦ Ecotoxicology ♦ Environmental health ♦ Atmospheric protection/air quality control/air pollution ♦ Waste water technology / water pollution control / water management / aquatic pollution
Abstract Background A climate-controlled pot experiment was conducted to investigate the effects of planting alfalfa and applying organic fertilizer on the dissipation of benzo[a]pyrene from an aged contaminated agricultural soil. Results Short-term planting of alfalfa inhibited the dissipation of benzo[a]pyrene from the soil by 8.9%, and organic fertilizer enhanced benzo[a]pyrene removal from the soil by 11.6% compared with the unplanted and unfertilized treatments, respectively. No significant interaction was observed between alfalfa and organic fertilizer on benzo[a]pyrene dissipation. Sterilization completely inhibited the removal of benzo[a]pyrene from the soil indicating that its degradation by indigenous microorganisms may have been the main mechanism of dissipation. Furthermore, significant positive relationships were observed between benzo[a]pyrene removal and the contents of soil ammonium nitrogen, nitrate nitrogen, and total mineral nitrogen at the end of the experiment, suggesting that competition between plants and microorganisms for nitrogen may have inhibited benzo[a]pyrene dissipation in the rhizosphere of alfalfa and the addition of organic fertilizer may facilitate microbial degradation of benzo[a]pyrene in the soil.
ISSN 09441344
Learning Resource Type Article
Publisher Date 2012-06-01
e-ISSN 16147499
Journal Environmental Science and Pollution Research
Volume Number 19
Issue Number 5