Comparing desorption properties of pollutants on bentonite particles and in compacted bentonite

Shu, Shi; Li, Yunquan; Wang, Zhu; Wu, Sheng; Wu, Yong; Hou, Hao

doi:10.1016/j.ecoenv.2021.111940

“…The traditional methods for preventing seepage, such as the utilization of cohesive soil to enhance loess 28 , the implementation of bentonite composite geomembrane 27 , and others 29 , are not the ideal solutions for the local landfill in Lanzhou loess. This is because the availability of local bentonite in Lanzhou is limited, requiring transportation from other provinces 30 , which would increase the project cost. Cost control is crucial, especially in Lanzhou, an economically challenged region.…”

Section: Introductionmentioning

confidence: 99%

Study on the relationship between permeability coefficient and porosity, the confining and osmotic pressure of attapulgite-modified loess

Zhang,

Pishro,

Zhang

et al. 2023

Sci Rep

2

0

View full text Add to dashboard Cite

This study investigated attapulgite-modified loess as an efficient and cost-effective method for creating an impermeable liner for landfills in regions with scarce clay resources. Laboratory permeability tests were conducted using a flexible wall permeameter to determine the permeability of compacted loess and attapulgite mixtures under varying osmotic conditions. The relationship between the permeability coefficient, attapulgite dosage, radial pressure, and osmotic pressure was analyzed. Nuclear magnetic resonance and scanning electron microscopy were also used to observe the microstructure of the modified loess. The results showed that attapulgite dosage significantly reduced the permeability coefficient, but the effect became limited when the content surpassed 10%. The decrease of the permeability coefficient of the modified loess is mainly due to the filling of pores between the loess by attapulgite, which makes the pore size and throat size of the modified loess smaller. The modified loess displayed a sheet structure that contributed to an increased permeability coefficient due to increased radial pressure. This study provides valuable insights into using attapulgite-modified loess as a material for landfill lining in regions with scarce clay resources.

show abstract

Assessment of Clay Mineral Attenuation Capacity for Human Viral Pathogens

Das

¹

,

Bharat

²

2022

J. Hazard. Toxic Radioact. Waste

View full text Add to dashboard Cite

Study on the relationship between permeability coefficient and porosity, the confining and osmotic pressure of attapulgite-modified loess

Zhang

¹

,

Pishro

²

,

Zhang

³

et al. 2023

Preprint

0

View full text Add to dashboard Cite

This study investigated attapulgite-modified loess as an efficient and cost-effective method for creating an impermeable liner for landfills in regions with scarce clay resources. Laboratory permeability tests were conducted using a flexible wall permeameter to determine the permeability of compacted loess and attapulgite mixtures under varying osmotic conditions. The relationship between the permeability coefficient, attapulgite dosage, radial pressure, and osmotic pressure was analyzed. Nuclear magnetic resonance and scanning electron microscopy were also used to observe the microstructure of the modified loess. The results showed that attapulgite dosage significantly reduced the permeability coefficient, but the effect became limited when the content surpassed 10%. The decrease of the permeability coefficient of the modified loess is mainly due to the filling of pores between the loess by attapulgite, which makes the pore size and throat size of the modified loess smaller. The modified loess displayed a sheet structure that contributed to an increased permeability coefficient due to increased radial pressure. This study provides valuable insights into using attapulgite-modified loess as a material for landfill lining in regions with scarce clay resources.

show abstract

Comparing desorption properties of pollutants on bentonite particles and in compacted bentonite

Cited by 3 publications

References 30 publications

Study on the relationship between permeability coefficient and porosity, the confining and osmotic pressure of attapulgite-modified loess

Study on the relationship between permeability coefficient and porosity, the confining and osmotic pressure of attapulgite-modified loess

Assessment of Clay Mineral Attenuation Capacity for Human Viral Pathogens

Study on the relationship between permeability coefficient and porosity, the confining and osmotic pressure of attapulgite-modified loess

Contact Info

Product

Resources

About