Sun Yidian, Dong Deming, Zhang Liwen, He Sinan, Hua Xiuyi, Guo Zhiyong
a Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of Environment and Resources, Jilin University , Changchun , China.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2018;53(11):960-967. doi: 10.1080/10934529.2018.1470804. Epub 2018 Jun 14.
The occurrence, spatial distribution, seasonal variation, sources, and ecological risks of polycyclic aromatic hydrocarbons (PAHs) in overlying water and surface sediments from Tiaozi River, which is an urban river running through the downtown of Siping City, a traditional industrial city of northeastern China, were investigated. The total PAH concentrations (ΣPAHs) in water varied from 473.5 to 2674.3 ng/L with a mean value of 1272.6 ng/L and ranged from 601.5 to 2906.3 ng/g with a mean value of 1534.4 ng/g in sediments. Both the individual and total PAH concentrations in water and sediments decreased from upstream to downstream, and the average ΣPAHs between the four seasons in water and sediments decreased in the following order of winter> autumn> spring> summer. The composition of the PAHs was characterized by an abundance of PAHs from 2 rings to 4 rings, and the predominant components were naphthalene, chrysene, and benzo(a)anthracene. The identification of the source indicated that coal combustion could be the main contributor to the PAHs. The equivalent toxic concentrations of benzo[a]pyrene in the water ranged from 11.5 to 33.1 ng/L, which were much higher than the concentration limit, suggesting that PAHs in the water could cause potential risks. The risk assessment of PAHs in sediments also showed that PAHs could cause negative effects on aquatic organisms in this river.
对条子河（一条流经中国东北传统工业城市四平市市中心的城市河流）上覆水和表层沉积物中多环芳烃（PAHs）的发生情况、空间分布、季节变化、来源及生态风险进行了调查。水中PAHs的总浓度（ΣPAHs）在473.5至2674.3 ng/L之间，平均值为1272.6 ng/L；沉积物中的浓度范围为601.5至2906.3 ng/g，平均值为1534.4 ng/g。水和沉积物中PAHs的单个和总浓度均从上游向下游降低，水和沉积物中四个季节的平均ΣPAHs按冬季>秋季>春季>夏季的顺序降低。PAHs的组成特征是2环至4环的PAHs含量丰富，主要成分是萘、屈和苯并(a)蒽。来源鉴定表明，煤炭燃烧可能是PAHs的主要来源。水中苯并[a]芘的等效毒性浓度在11.5至33.1 ng/L之间，远高于浓度限值，表明水中的PAHs可能会造成潜在风险。沉积物中PAHs的风险评估也表明，PAHs可能会对这条河流中的水生生物造成负面影响。
