最新论文

绿色非洲

您现在的位置:首页 > 最新论文



Title:  Occurrence and risk assessment of polycyclic aromatic hydrocarbons in the Hanjiang River Basin and the Danjiangkou Reservoir, China

Authors:  Yueling Qi, Anita Awino Owino, Victorine Anyango Makokha, Yun Shen, Di Zhang & Jun Wang*

Affiliations:  1. Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China

2. Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China

3. University of Chinese Academy of Sciences, Beijing 100049, China

Year:  2016

Journal:  Human and Ecological Risk Assessment: An International Journal

Link:  http://www.tandfonline.com/doi/full/10.1080/10807039.2016.1147942

Abstract:  This study was conducted to investigate the occurrence, distribution, and source of 16 polycyclic aromatic hydrocarbons (PAHs) in the Hanjiang River Basin and the Danjiangkou (DJK) Reservoir. The concentrations of total PAHs in surface water, sediments, and bank soils ranged from 9.42 to 137.94 ng/l, 86.23 to 2514.93 ng/g, and 133.17 to 671.93 ng/g dry weight, respectively. The composition pattern of PAHs showed that 3-ring PAHs were dominated in all of the samples, while the proportion of high molecular weight PAHs (5- to 6-ring PAHs) in sediments and bank soil samples was almost three times higher than water. The source apportionment analysis showed that most of the PAHs in water were derived from sources of petroleum and combustion, while combustion was the predominant source of PAHs in sediments and bank soils. The methods based on toxic equivalency factors, risk quotient, and incremental lifetime cancer risk were used to assess the ecosystem risk and potential health risk of PAHs. The risk assessments showed that PAHs in the DJK Reservoir were out of potential health risk, but the ecological risk for majority of 16 PAHs was in the moderate level.

阅读全文

隐藏统计代码