College of Environmental Science and Engineering, Ocean University of China, Qingdao, China.
Environ Monit Assess. 2012 Sep;184(9):5545-52. doi: 10.1007/s10661-011-2360-8. Epub 2011 Oct 18.
Thirty-one surface soil samples were collected from Liaohe estuarine wetland in October 2008 and May and August 2009. The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs), identified as priority pollutants by the US EPA, were measured by gas chromatography. PAHs were predominated by three- and four-ring compounds. The total PAH concentrations ranged from 704.7 to 1,804.5 μg/kg with a mean value of 1,001.9 μg/kg in October 2008, from 509.7 to 1,936.9 μg/kg with an average of 887.1 μg/kg in May 2009, and from 293.4 to 1,735.9 μg/kg with a mean value of 675.4 μg/kg in August 2009. The PAH concentration detected at most sites shared the same pattern, with maximum concentrations during the autumn (October) and minimum concentrations during the summer (August). The ecological risk assessment of PAHs showed that adverse effects would occasionally occur in the soils from Liaohe estuarine wetland based on the effects range low (ERL)/effects range median and the toxic equivalency factors. The results revealed that some of the individual PAHs were in excess of ERL which implied possible acute adverse biological effects. The BaP(eq) values in some sites surpassed the Dutch target value. Therewith, quite a part of soils in the wetland were subjected to potential ecological risks.
2008 年 10 月、2009 年 5 月和 8 月，从辽河口湿地采集了 31 个表层土壤样本。使用气相色谱法测定了美国环保署确定的 16 种优先污染物多环芳烃（PAHs）的浓度。PAHs 主要由三环和四环化合物组成。2008 年 10 月，总多环芳烃浓度范围为 704.7 至 1804.5μg/kg，平均值为 1001.9μg/kg；2009 年 5 月，浓度范围为 509.7 至 1936.9μg/kg，平均值为 887.1μg/kg；2009 年 8 月，浓度范围为 293.4 至 1735.9μg/kg，平均值为 675.4μg/kg。大多数地点检测到的多环芳烃浓度具有相同的模式，秋季（10 月）浓度最高，夏季（8 月）浓度最低。多环芳烃的生态风险评估显示，基于效应范围低值（ERL）/效应范围中值和毒性等效因子，辽河口湿地土壤中偶尔会出现不利影响。结果表明，一些个别多环芳烃超过了 ERL，这意味着可能会产生急性不利的生物影响。一些地点的 BaP(eq)值超过了荷兰目标值。因此，湿地相当一部分土壤受到潜在的生态风险。
