Feng Jinglan, Xi Nannan, Zhang Fei, Zhao Jiahui, Hu Pengtuan, Sun Jianhui
School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, 453007, Henan, People's Republic of China.
Environ Monit Assess. 2016 Jan;188(1):61. doi: 10.1007/s10661-015-5060-y. Epub 2015 Dec 29.
To investigate the distributions, degree, and possible sources of polycyclic aromatic hydrocarbons (PAHs) in bed sediments from four rivers of Xinxiang, 18 sediment samples were analyzed. The concentrations ranged from 4.45 × 10(3) to 29.0 × 10(3) ng/g for ∑15PAHs (sum of US Environmental Protection Agency (EPA) priority PAHs apart from naphthalene (Nap)) and 3.37 × 10(3) to 23.5 × 10(3) ng/g for ∑7carPAHs (including benzo[a]anthracene (BaA), chrysene (Chr), benzo[b]fluoranthene (BbF), benzo[k]fluoranthene (BkF), benzo[a]pyrene (BaP), dibenzo[a,h]anthracene (DBA), and indeno[1,2,3-cd]pyrene (InP)) with average concentrations of 10.7 × 10(3) and 7.99 × 10(3) ng/g, respectively. Compared with those from other rivers in China, sediments from four rivers of Xinxiang were severely polluted with PAHs. Pearson correlation analysis showed that ∑15PAHs concentrations had a significant positive correlation with black carbon content. Four- to six-ring PAHs accounted for 83.4 % of total PAHs, which indicated that the main source of PAHs in the studied area could be pyrogenic contamination. Source apportionment using PCA/MLR and UNMIX revealed that coal and biomass combustion contributed 64.4-67.1 %, gasoline vehicle 23.2-27.2 %, and diesel vehicle 5.70-12.4 % of the total PAHs, respectively. The effects range low/effects range median (ERL/ERM) values showed that there was a high level of toxicity risk for BaA. The ecological risk assessment by mean effects range median quotients (mERMQ) revealed a medium ecological risk of ∑15PAHs in sediments from four rivers of Xinxiang, manifesting that a close attention should be paid to pollution of PAHs in the studied area.
为研究新乡市四条河流底泥中多环芳烃（PAHs）的分布、含量及可能来源，对18个沉积物样本进行了分析。∑15PAHs（美国环境保护局（EPA）除萘（Nap）外的优先PAHs总和）浓度范围为4.45×10³至29.0×10³ ng/g，∑7carPAHs（包括苯并[a]蒽（BaA）、屈（Chr）、苯并[b]荧蒽（BbF）、苯并[k]荧蒽（BkF）、苯并[a]芘（BaP）、二苯并[a,h]蒽（DBA）和茚并[1,2,3-cd]芘（InP））浓度范围为3.37×10³至23.5×10³ ng/g，平均浓度分别为10.7×10³和7.99×10³ ng/g。与中国其他河流的沉积物相比，新乡市四条河流的沉积物受到PAHs的严重污染。Pearson相关性分析表明，∑15PAHs浓度与黑碳含量呈显著正相关。四环至六环PAHs占总PAHs的83.4%，这表明研究区域内PAHs的主要来源可能是热解污染。使用主成分分析/多元线性回归（PCA/MLR）和UNMIX进行源解析表明，煤和生物质燃烧分别占总PAHs的64.4 - 67.1%，汽油车占23.2 - 27.2%，柴油车占5.70 - 12.4%。效应范围低值/效应范围中值（ERL/ERM）值表明，BaA存在较高的毒性风险。通过平均效应范围中值商数（mERMQ）进行的生态风险评估显示，新乡市四条河流沉积物中∑15PAHs存在中等生态风险，表明应密切关注研究区域内PAHs的污染情况。
