水利水电科技进展2016，Vol.36Issue(6)：75-79,85,6.DOI:10.3880/j.issn.10067647.2016.06.014
气泡墙对垃圾填埋场黏土衬垫中典型VOCs迁移的影响
Effects of bubble wall on migration of representative VOCs through clay liners of landfill
摘要
Abstract
To improve the performance of a clay liner in blocking the volatile organic contaminants ( VOCs) at the bottom of a landfill, a mathematical model intended to study the migration of VOCs through the clay liner with bubbles was established based on the convection-diffusion-adsorption mechanism. Other mechanisms, including consolidation deformation of the clay liner with disconnected bubbles, intrinsic biodegradation of VOCs, and transferring of VOCs between the liquid and solid phases, were integrated in the newly proposed model. Using an actual project as an example, the mathematical model was solved with a finite element software for multiple physical fields, and the transfer and transformation of representative VOCs through the clay liner were investigated. The results show that the retardation effect of vapor formed by the trapped bubbles can impede the break of typical VOCs through the clay liner to some extent. In particular, when the gas in the bubbles is oxygen, significant intrinsic biodegradation of VOCs due to the presence of oxygen can efficiently block the VOCs, and the bubble wall layer is relatively thin under common concentration conditions of pollutants in landfills.关键词
可挥发性有机污染物/黏土衬垫/夹气泡/固有生物降解/蒸汽阻滞Key words
volatile organic contaminants/clay liner/trapped gas bubbles/intrinsic biodegradation/vapor retardation分类
建筑与水利引用本文复制引用
张会杰,吴冰清,徐海侠..气泡墙对垃圾填埋场黏土衬垫中典型VOCs迁移的影响[J].水利水电科技进展,2016,36(6):75-79,85,6.基金项目
国家自然科学基金(51308259) （51308259）
江苏省高校自然科学研究项目(13KJB610004) （13KJB610004）
江苏大学高级人才基金(14JDG023) （14JDG023）
