引用本文:李泽文,王海燕,孔秀琴,等.松花江表层沉积物中16种多环芳烃空间分布特征及生态风险评价[J].环境科学研究,2020,(1):163-173.
LI Zewen,WANG Haiyan,KONG Xiuqin,et al.Spatial Distribution Characteristics and Ecological Risk Assessment of 16 PAHs in Surface Sediment of Songhua River[J].Research of Environmental Sciences,2020,(1):163-173.]
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松花江表层沉积物中16种多环芳烃空间分布特征及生态风险评价
李泽文1,2,3, 王海燕2,3, 孔秀琴1, 杨艳艳2,3, 钟震1,2,3, 李莉2,3, 吴桐2,3
1. 兰州理工大学, 甘肃 兰州 730050;2. 中国环境科学研究院环境污染控制工程技术研究中心, 北京 100012;3. 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012
摘要:
为揭示松花江干支流表层沉积物中16种PAHs(多环芳烃)的空间分布特征及其生态风险状况,采用气相色谱-质谱联用仪分析了2017年9月松花江干支流26个表层沉积物16种PAHs质量分数特征,并采用比值法对其污染来源进行解析,运用沉积物质量基准法和质量标准法评价其生态风险状况.结果表明:①松花江干支流表层沉积物中w(∑16PAHs)为169.76~3 769.19 ng/g,以3~6环高环为主,并且支流w(∑16PAHs)(范围为169.76~3 769.19 ng/g,平均值为1 598.41 ng/g)高于干流(范围为459.92~2 092.58 ng/g,平均值为1 173.67 ng/g),呈从上游到下游逐渐降低的趋势.②松花江干支流表层沉积物中w(∑16PAHs)主要来源于生物质燃烧和石油燃烧.③松花江干支流表层沉积物中w(∑16PAHs)总体处于低生态风险水平,个别支流点位(3个)会发产生经常性生态风险.研究显示,松花江流域干支流表层沉积物中w(∑16PAHs)呈从上游到下游逐渐降低的趋势,并且支流高于干流,但总体处于低生态风险水平.
关键词:  松花江  16种多环芳烃  分布特征  沉积物  生态风险
DOI:10.13198/j.issn.1001-6929.2019.05.20
分类号:X53
基金项目:国家水体污染控制与治理科技重大专项(No.2015ZX07201-008-02)
Spatial Distribution Characteristics and Ecological Risk Assessment of 16 PAHs in Surface Sediment of Songhua River
LI Zewen1,2,3, WANG Haiyan2,3, KONG Xiuqin1, YANG Yanyan2,3, ZHONG Zhen1,2,3, LI Li2,3, WU Tong2,3
1. Lanzhou University of Technology, Lanzhou 730050, China;2. Research Center for Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;3. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Abstract:
In order to reveal the spatial distribution characteristics and ecological risk of 16 polycyclic aromatic hydrocarbons (∑16PAHs) in surface sediment of the mainstream and tributaries in Songhua River Basin, the ∑16PAHs concentration of 26 samples collected in Sep. 2017 were analyzed using chromatography-mass spectrometry (GC-MS). The ∑16PAHs sources were determined by the ratio of feature components, and their ecological risk was assessed by the sediment quality guidelines and sediment quality standards (SQSs). The results show that:(1) The total concentration of ∑16PAHs (w(∑16PAHs) was in the range of 169.76-3769.19 ng/g, and the main components were 3-6 ring PAHs. The w(∑16PAHs) in the sediments of the tributaries (169.76-3769.19 ng/g, averaged at 1598.41 ng/g) was higher than that of the mainstream (459.92-2092.58 ng/g, averaged at 1173.67 ng/g) in Songhua River, and the w(∑16PAHs) decreased gradually from the upstream to the downstream. (2) The w(∑16PAHs) was mainly derived from the biomass fuel combustion and fossil fuel combustion. (3) The ecological risk level of sediment w(∑16PAHs) was low except for 3 sampling points in the tributaries, which had frequent ecological risks. This research showed that the sediment w(∑16PAHs) in Songhua River decreased gradually from the upstream to the downstream, the sediment w(∑16PAHs) in the tributary was higher than that in the main stream, and the ecological risk of the entire Songhua River Basin was low.
Key words:  Songhua River  16 kinds of PAHs  distribution characteristics  sediments  ecological risk