Hydraulic conductivity of compacted soils controlled by microbial activity

被引：14

作者：

Alejandro Glatstein, Daniel ^{[1
,2
]}

Matias Francisca, Franco ^{[2
,3
]}

机构：

[1] Univ Nacl Cordoba, Dept Chem, Fac Ciencias Exactas Fis & Nat, RA-5000 Cordoba, Argentina

[2] Consejo Nacl Invest Cient & Tecn CONICET, RA-5016 Cordoba, Argentina

[3] Univ Nacl Cordoba, Fac Ciencias Exactas Fis & Nat, Civil & Environm Dept, RA-5000 Cordoba, Argentina

来源：

ENVIRONMENTAL TECHNOLOGY | 2014年 / 35卷 / 15期

关键词：

barriers; landfills; microbes; earthen liners; organic mater; hydraulic conductivity; CARBONATE PRECIPITATION; POROUS-MEDIA; BENTONITE; SAND; FLOW;

D O I：

10.1080/09593330.2014.885583

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The hydraulic conductivity defines the displacement of liquids inside porous media and affects the fate and transport of contaminants in the environment. In this research the influence of microbial growth and decay inside soil pores on hydraulic conductivity is analysed. Long-term tests performed in silt-bentonite mixtures permeated with distilled water and a nutrients solution demonstrated that hydraulic conductivity of compacted silt-bentonite samples decreases with time of permeation as a bioclogging mechanism develops. The injection of antibiotics and antifungals in the specimens produces a rebound in the hydraulic conductivity associated with the decay of microbial activity. These results show that biomediated reactions can be used to control the flow rate through compacted soil liners.

引用

页码：1886 / 1892

页数：7

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