| 丹江口水库迁建区土壤PAHs的分布特征与来源及其生态风险评价 |
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| 引用本文： | 张 雷,温 泉,秦延文,刘志超,常 旭,曹 伟.丹江口水库迁建区土壤PAHs的分布特征与来源及其生态风险评价[J].环境科学研究,2015,28(5):767-774. |
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| 作者姓名： | 张 雷 温 泉 秦延文 刘志超 常 旭 曹 伟 |
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| 作者单位： | 1. 中国环境科学研究院,环境保护河口与海岸带环境重点实验室,北京 100012
2. 中国环境科学研究院,环境保护河口与海岸带环境重点实验室,北京 100012;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 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2012ZX07503-002) |
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| 摘 要： | 为评价丹江口水库迁建区土壤中PAHs的污染水平及该区域被淹没后的生态风险,采用GCMS(气相色谱-质谱联用仪)分析技术,检测了该区域表层(0~20 cm)土壤中的w(PAHs),并探讨不同土地利用方式下PAHs的分布特征及来源.结果表明:1研究区域表层土壤中w(PAHs)为4.04~181 ngg,平均值为41.3 ngg,在不同土地利用方式下表现为居住地玉米地菜地其他耕地养殖地林地果园.2特征化合物指数法分析结果显示,菜地、居住地和其他耕地表层土壤中PAHs主要来自柴油燃烧,少部分属既有燃料燃烧又有石油污染的混合源,养殖地和玉米地表层土壤中PAHs主要来自燃料燃烧,说明土地利用方式对表层土壤中PAHs的质量分数、组成及其来源等均产生一定影响.3与国内其他地区湖泊和水库沉积物相比,研究区域表层土壤中w(PAHs)较低,属于清洁无污染等级.迁建区表层土壤被淹没成为沉积物后,由于PAHs污染程度较小,因此潜在生态风险较低.
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| 关 键 词： | PAHs 含量 组成 分布 来源 生态风险 丹江口水库 |
Concentrations, Sources and Ecological Risk Evaluation of Polycyclic Aromatic Hydrocarbons (PAHs) in the Soil of Relocation Areas from the Danjiangkou Reservoir |
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| ZHANG Lei,WEN Quan,QIN Yanwen,LIU Zhichao,CHANG Xu and CAO Wei.Concentrations, Sources and Ecological Risk Evaluation of Polycyclic Aromatic Hydrocarbons (PAHs) in the Soil of Relocation Areas from the Danjiangkou Reservoir[J].Research of Environmental Sciences,2015,28(5):767-774. |
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| Authors: | ZHANG Lei WEN Quan QIN Yanwen LIU Zhichao CHANG Xu and CAO Wei |
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| Affiliation: | State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Water Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Water Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Water Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Water Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Water Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China and State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Water Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
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| Abstract: | Abstract:To investigate the contamination and ecological risk of PAHs in the soil of relocation areas from the Danjiangkou Reservoir, surface soil samples (0-20 cm) were analyzed for Polycyclic Aromatic Hydrocarbon (PAHs) residues. The distribution characteristics and sources of PAHs of soil from different land use types were investigated. The results indicated that the concentrations of the total PAHs in the soils ranged from 4.04 to 181 ng/g, with an average value of 41.3 ng/g. Concentrations of the total PAHs in different land use soils showed a decreasing order:residence areas>corn areas>vegetable areas>other farmland areas>cultivated areas>forestland areas>orchard areas, indicating concentrations and compositions of PAHs were varied due to different land use types. The characteristic compound index method indicated that diesel combustion was the major source of PAHs in surface soils from other farmland areas, vegetable areas and residence areas, while a small proportion was contributed by petroleum emissions together with combustion. PAHs in soils from cultivated areas and corn areas were mainly from combustion sources. Comparing with other sediments of lakes and reservoirs in China, concentrations of PAHs in soils of relocation areas from the Danjiangkou Reservoir were at low level, indicating non-contaminated levels. After the surface soil of relocation area submerged to be sediments, the low level PAHs in the soils of relocation areas showed low ecological risk levels. |
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| Keywords: | polycyclic aromatic hydrocarbons content composition distribution source ecological risk Danjiangkou Reservoir |
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