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首页> 外文期刊>Environmental Science and Pollution Research >Characteristic contaminants in snowpack and snowmelt surface runoff from different functional areas in Beijing, China
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Characteristic contaminants in snowpack and snowmelt surface runoff from different functional areas in Beijing, China

机译：中国北京不同职能区的积雪和雪花面积径流的特征污染物

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Characteristics of physicochemical parameters, dissolved-phase heavy metals, and polycyclic aromatic hydrocarbons (PAHs) were investigated for 68 urban snowmelt surface runoff and snowpack samples collected from five different functional areas in Beijing, including a business area (BA), a cultural and educational area (CEA), a garden area (GA), a residential area (RA), and a roadside area (RSA). Both snowmelt surface runoff and snowpack were significantly polluted by organic matter, as indicated by their high concentrations of chemical oxygen demand (COD) and total organic carbon (TOC). Among the 11 heavy metals analyzed, Zn was the most enriched in all samples, followed by Mn, Fe, and Cu, whereas the concentrations of Pb, Cr, Cd, As, Ni, Sb, and Co were comparatively low. The results suggested that typical traffic emissions, natural events, industrial practices, and human activities were mainly sources of heavy metals. Low molecular-weight (LMW) PAHs were the dominant sources in snowmelt and snowpack. Anthracene (Ant) and fluorene (Flo) were the most enriched PAHs in both snowmelt surface runoff and snowpack. Coal burning for heating and traffic activities were the most important contributors of PAH pollutants in snowmelt surface runoff and snowpack in Beijing in the winter. Ecological risk assessment demonstrated, however, that heavy metals in snowmelt surface runoff pose little risk to downstream aquatic environments. A middle potential ecological risk could be caused by Ant, Flo, benzo[g, h, i]perylene (BghiP), and benzo[a]pyrene (BaA).
机译：研究了物理化学参数，溶解相重金属和多环芳烃（PAHS）的特征，为68个城市雪地面径流和来自北京的五个不同功能区域收集的积雪样本，包括商业区（BA），文化和教育区域（CEA），花园区域（GA），住宅区（RA）和路边区域（RSA）。散雪表面径流和积雪均受到有机物质的显着污染，如其高浓度的化学需氧量（COD）和总有机碳（TOC）所示。在分析的11种重金属中，Zn在所有样品中最富集，其次是Mn，Fe和Cu，而Pb，Cr，Cd的浓度为Ni，Sb和Co相对较低。结果表明，典型的交通排放，自然事件，工业实践和人类活动主要是重金属的来源。低分子量（LMW）PAH是散雪和积雪中的主要来源。蒽（蚂蚁）和芴（Flo）是散雪表面径流和积雪中最丰富的PAH。用于加热和交通活动的煤炭是Pah污染物在冬季北京雪橇表面径流和积雪中最重要的贡献者。然而，生态风险评估证明了雪花面表面径流中的重金属对下游水产环境的风险很小。中间潜在的生态风险可能是由蚂蚁，flo，苯并[g，h，i]丙烯（bghip）和苯并[a]芘（baa）引起的。

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