ORIGINAL RESEARCH
The Potential of Wheat Straw Fibre in Treatment of Heavy Metal-Contaminated Soil: Mechanical Properties Research
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Xu Qi 1
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1
Soochow University, No.8, Jixue Road, Xiangcheng District, Suzhou, 215131, China
 
2
Graduate School of Global Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
 
 
Submission date: 2021-06-23
 
 
Final revision date: 2021-11-02
 
 
Acceptance date: 2021-11-15
 
 
Online publication date: 2022-02-24
 
 
Publication date: 2022-04-06
 
 
Corresponding author
Tang Qiang   

Soochow University, 215000, Suzhou, China
 
 
Pol. J. Environ. Stud. 2022;31(3):1995-2006
 
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ABSTRACT
Soil contamination by heavy metals threatens human health, and the disposal of heavy metal- contaminated soil remains a serve problem worldwide. The heavy metals in soil degrade soil mechanical properties, while the utilization of contaminated soil is difficult. In previous studies, to decrease the impact of heavy metals, different types of cement and fibres were used to improve soil mechanical properties. This paper investigates the validity of combined use of wheat straw fibre and Portland cement in heavy metal-contaminated soil, and discusses the effect in mechanical properties. Wheat straw reinforced soil (WS), wheat straw and cement reinforced soil (WCS) and wheat straw and cement reinforced heavy metal-contaminated soil (WCCS), were tested via different heavy metal content and type, different fibre content and length, different cement content and curing age. The unconfined compressive strength (UCS), failure strain, deformation modulus, cohesion and internal friction angle were determined by series of unconfined compressive strength tests and direct shear tests.
eISSN:2083-5906
ISSN:1230-1485
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