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| Ecological hazard concentration of pyrene to Chinese cabbage based on species sensitivity distribution |
| Received:February 25, 2018 |
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| KeyWord:pyrene;Chinese cabbage;species sensitivity distribution;dose response;ecological hazard concentration |
| Author Name | Affiliation | E-mail | | YANG Xiao-song | College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | | LIU Yue-xian | College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | liuyuexian@ucas.ac.cn | | XIE Xiao-fan | College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | | ZHANG Meng | School of Chemical & Environmental Engineering, China University of Mining and Technology, Beijing 100083, China | | | WANG Wei | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | |
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| Abstract: |
| Hazardous aromatic pollutants, such as polycyclic aromatic hydrocarbons (PAHs) have received increased attention in recent years owing to their teratogenic and carcinogenic properties. However, analysis of the PAH concentrations that are hazardous to crops is insufficient for assessing the risks of PAHs to farmland. To predict the ecological hazard concentration (HC5) of pyrene to Chinese cabbage, a pot experiment was conducted to investigate the dose responses to pyrene of 11 Chinese cabbage cultivars. The results showed that the biomass (fresh weight) of two of the cabbage cultivars (JC-60 and JQ-65) decreased with increasing application rates of pyrene, whereas the biomass (fresh weight) of the other nine Chinese cabbage cultivars increased with low pyrene application rates and then decreased as the pyrene application rate increased further. Different models (i.e., log-logistic and Brian-Cousens) were used to derive the effective concentrations of 10% response and 50% response (EC10 and EC50 respectively) based on the biomass of the 11 cabbage cultivars. The EC10 of pyrene for cabbage ranged from 4.14 mg·kg-1 to 52.76 mg·kg-1, and the EC50 from 28.35 mg·kg-1 to 545.11 mg·kg-1. The ecological hazard concentration for 5% of the cultivars was derived based on the EC10 and EC50 by employing a species sensitivity distribution (SSD) approach. The HC510% of pyrene at a 10% inhibition concentration was 4.52 mg·kg-1, with a confidence interval of 2.02~10.04, and the HC550% was 37.68 mg·kg-1, with a confidence interval of 24.99~56.79. |
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