| 多环芳烃在土壤剖面中迁移行为的土柱淋滤模拟研究 |
| |
| 引用本文： | 何奉朋,张枝焕,汪淑洁.多环芳烃在土壤剖面中迁移行为的土柱淋滤模拟研究[J].环境科学学报,2009,29(5):988-996. |
| |
| 作者姓名： | 何奉朋 张枝焕 汪淑洁 |
| |
| 作者单位： | 1. 长庆油田公司第一采油厂地质所,延安716000;中国石油大学,油气资源与探测国家重点实验室,北京102249
2. 中国石油大学,油气资源与探测国家重点实验室,北京102249 |
| |
| 摘 要： | 京津地区典型土壤剖面分析表明,土壤中PAHs含量和组成均随深度增大而呈现明显的变化.为了揭示PAHs在土壤剖面中的迁移特征与控制因素,开展了室内土柱模拟实验,考察了PAHs的迁移特点及影响因素,特别是土壤有机质含量的影响.采用3种土壤质地和TOC不同的土样装填土柱,以去离子水作为淋滤液对预先加入土柱表层的污染物(包括不同环数PAHs、d-Flu)进行淋滤,当达到淋滤量后分析土柱中PAHs含量及组成.结果表明,不同实验条件下,淋滤后土壤剖面不同层次土壤中PAHs含量均高于原土样中的,且PAHs主要富集在土柱表层,随深度增加其含量明显降低,但不同土柱中降幅不同;不同环数PAHs分布特征存在差异.与原土柱相比,除d-Flu和Flu等低环数芳烃的含量在剖面不同深度均有明显增大外,部分高环数PAHs相对含量在土柱的不同深度也明显增加,说明高环数PAHs也具有一定的迁移能力,但相对于3环PAHs,高环数PAHs在土壤中迁移能力较低.此外,土壤剖面PAHs的富集程度明显受土壤中TOC影响,PAHs总量或单体PAH含量在土柱中迁移的深度随着TOC含量降低而增加.
|
| 关 键 词： | 多环芳烃 淋滤 土柱 迁移 |
| 收稿时间： | 7/31/2008 5:49:44 PM |
| 修稿时间： | 11/6/2008 3:03:40 PM |
Modeling vertical migration characteristics of polycyclic aromatic hydrocarbons in soil columns by leaching |
| |
| HE Fengpeng,ZHANG Zhihuan and WANG Shujie.Modeling vertical migration characteristics of polycyclic aromatic hydrocarbons in soil columns by leaching[J].Acta Scientiae Circumstantiae,2009,29(5):988-996. |
| |
| Authors: | HE Fengpeng ZHANG Zhihuan and WANG Shujie |
| |
| Institution: | HE Fengpeng1,2,ZHANG Zhihuan2,WANG Shujie2 1.PetroChina Changqing Oilfield Company Oil Production Plant No.1,Yan'an 7160002.State Key Laboratory of Petroleum Resource , Prospecting,China University of Petroleum,Beijing 102249 |
| |
| Abstract: | Analyses have shown that the concentrations and the compositions of polycyclic aromatic hydrocarbons(PAHs)in the representative soil profiles of Beijing and Tianjin change obviously with depth.In order to reveal the migration behavior and critical factors affecting PAH concentrations in soil profiles,laboratory simulations of soil columns were designed to determine the factors,especially soil organic matter content,which affect migration behavior of PAHs.Three soil matrices with different textures and TOC,p... |
| |
| Keywords: | PAHs leaching soil columns migration |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学学报》浏览原始摘要信息 |
| 点击此处可从《环境科学学报》下载免费的PDF全文 |
|
