Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, PR China.
Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, PR China; Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, USA.
Ecotoxicol Environ Saf. 2021 May;214:112095. doi: 10.1016/j.ecoenv.2021.112095. Epub 2021 Mar 2.
In this study, urban stream sediment samples were collected in the Suzhou Industrial Park (SIP), one of the earliest national demonstration eco-industrial parks of China. PAHs were analyzed in these sediments, and concentrations of total PAHs were 180-81,000 ng g (5700 ± 14,000 ng g). Medium molecular weight (4- ring) PAHs were predominant (42 ± 12%), followed by high molecular weight (5- and 6- ring) PAHs (31 ± 10%). No correlation was found between concentrations of PAHs and land uses of SIP in this study. Diagnostic ratios and a positive matrix factorization (PMF) model indicated that coal/biomass combustion might be the primary PAH source (61%), followed by non-combustion sources (21%) and vehicular emission (18%). According to the spatial analysis, PAHs in the sediments of SIP might be mainly associated with the coal/biomass combustion in the northeast industrial zone. Residential & commercial activities seem not to be the major causes of PAH contamination. Total PAH toxic equivalent concentrations, effect range low/effect range median values, and mean effects range-median quotient all showed that PAHs were present at a low toxicity risk level in most regions of the SIP. However, vigilance is required at some sampling sites with extremely high PAH concentrations or high mean effects range-median quotient.
在这项研究中，采集了中国最早的国家级示范生态工业园区之一——苏州工业园区 (SIP) 的城市河流沉积物样本。对这些沉积物中的多环芳烃进行了分析，总多环芳烃浓度为 180-81,000ng/g（5700±14,000ng/g）。中分子量（四环）多环芳烃占主导地位（42±12%），其次是高分子量（五环和六环）多环芳烃（31±10%）。本研究中未发现多环芳烃浓度与 SIP 的土地利用之间存在相关性。诊断比值和正矩阵因子化 (PMF) 模型表明，煤炭/生物质燃烧可能是多环芳烃的主要来源（61%），其次是非燃烧源（21%）和车辆排放（18%）。根据空间分析，SIP 沉积物中的多环芳烃可能主要与东北工业区的煤炭/生物质燃烧有关。居住和商业活动似乎不是多环芳烃污染的主要原因。多环芳烃总毒性当量浓度、效应范围低值/效应范围中值以及平均效应范围-中值商均表明，SIP 大部分地区的多环芳烃处于低毒性风险水平。然而，在某些采样点，由于多环芳烃浓度极高或平均效应范围-中值商较高，仍需保持警惕。
