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| 长江三角洲地区土壤环境质量与修复研究 Ⅳ.多环芳烃在土壤不同有机质组分中分配特征的研究 | |
| 引用本文： | 倪进治,骆永明,魏然,李秀华,钱薇.长江三角洲地区土壤环境质量与修复研究 Ⅳ.多环芳烃在土壤不同有机质组分中分配特征的研究[J].土壤学报,2007,44(5):817-823. |
| 作者姓名： | 倪进治 骆永明 魏然 李秀华 钱薇 |
| 作者单位： | 1. 中国科学院南京土壤研究所土壤与环境生物修复研究中心,南京,210008;福建师范大学地理科学学院亚热带资源与环境省重点实验室,福州,350007 2. 中国科学院南京土壤研究所土壤与环境生物修复研究中心,南京,210008 3. 福建师范大学地理科学学院亚热带资源与环境省重点实验室,福州,350007 |
| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划);中国科学院知识创新工程项目;王宽诚教育基金;江苏省博士后科学基金 |
| 摘 要： | 多环芳烃(PAHs)在土壤不同活性有机质库中的分配会影响它们在土壤中的迁移和生物有效性。本研究采用土壤有机无机复合体的分组方法,分离出以游离态有机物质存在的轻组和以有机无机复合体存在的重组,研究了15种美国环境保护署(USEPA)优控的PAHs在土壤轻组和重组以及重组结合态腐殖质不同组分中的分配特征。结果表明,轻组中PAHs总量的含量范围为1.30×104~1.07×105μg kg-1,远远高于PAHs总量的含量为221.7~297.8μg kg-1的重组。土壤中轻组的含量虽然只有0.4%~2.3%,但它结合的PAHs量却占土壤中PAHs总量的31.5%~69.5%。重组中PAHs含量主要分布在紧结态腐殖质中,占重组PAHs总量71.2%~87.2%。结合态腐殖质不同组分中PAHs的含量与它们有机碳的含量呈显著性正相关(p<0.01),紧结态腐殖质对PAHs的富集能力显著高于稳结态和松结态腐殖质。PAHs污染土壤的环境风险可能主要在于轻组结合的PAHs。 |
| 关 键 词： | 多环芳烃 土壤 轻组 结合态腐殖质 分配特征 |
| 收稿时间： | 2006/6/20 0:00:00 |
| 修稿时间： | 2006-06-20 |
SOIL ENVIRONMENTAL QUALITY AND REMEDIATION IN YANGTZE RIVER DELTA REGION Ⅳ. DISTRIBUTION CHARACTERISTICS OF POLYCYCLIC AROMATIC HYDROCARBONS IN DIFFERENT SOIL ORGANIC CARBON FRACTIONS |
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| Ni Jinzhi,Luo Yongming,Wei Ran,Li Xiuhua and Qian Wei.SOIL ENVIRONMENTAL QUALITY AND REMEDIATION IN YANGTZE RIVER DELTA REGION Ⅳ. DISTRIBUTION CHARACTERISTICS OF POLYCYCLIC AROMATIC HYDROCARBONS IN DIFFERENT SOIL ORGANIC CARBON FRACTIONS[J].Acta Pedologica Sinica,2007,44(5):817-823. | |
| Authors: | Ni Jinzhi Luo Yongming Wei Ran Li Xiuhua and Qian Wei |
| Institution: | 1 .Soil arid Environment Bioremediation Research Centre, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China ; 2. Key Laboratory of Subtropical Resources and Environments of Fujian Province, School of Geography Sciences, ujian Normal University, Fuzhou 350007, China |
| Abstract: | Distribution of polycyclic aromatic hydrocarbons (PAHs) among soil organic matter pools different in activity may influence their mobility and bioavailability in the soil.In this research,the distribution characteristics of 15 kinds of USEPA priority PAHs in soil light fractions,heavy fractions and different fract ions of combined humus of soil heavy fractions were studied by the fractionation method for soil organo mineral complexes.The results showed that the contents of total PAHs in light fractions ranged from 1.30 104 to 1.07 105g kg-1,far greater than in heavy fractions,ranging from 221.7 to 297.8 g kg-1,Al though the light fractions accounted for only 0.4% to 2.3% of the soil,they got associated with 31.5% to 69.5% of the PAHs in soils.The PAHs in heavy fract ions were mainly associated with tightly combined humus,account ing for 71.2% to 87.2% of total PAHs in heavy fraction.The contents of PAHs in different fractions of combined humus of heavy fractions had significantly positive correlation with their organic carbon contents (p<0.01),The enrichment ability of tightly combined humus was signifi cantly greater than that of stably combined and loosely combined humus.Environmental risk of PAHs polluted soils probably comes mainly from the PAHs combined with soil light fractions. |
| Keywords: | Polycyclic aromatic hydrocarbons(PAHs) Soil Light fraction Combined humus Distribution characteristics |
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