Selection of Landfill Cover Materials Based on Data Envelopment Analysis (DEA)—A Case Study on Four Typical Covering Materials

Zhang, Yibo; Liu, Yan; Min, Xuefeng; Jiang, Qifan; Su, Weizhou

doi:10.3390/su141710888

Cited by 3 publications

(3 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first phase of the resilience assessment considered the technical aspects of all three cover materials. The permeability, service life, tensile strength, and landfill compatibility were identified as the major indicators of the resilience of each cover system [13]. Ratings were provided for the CCL and EGM based on the values for each of these aspects for the clay and HDPE geomembrane as provided by Zhang et al [13].…”

Section: Resilience Assessmentmentioning

confidence: 99%

“…The permeability, service life, tensile strength, and landfill compatibility were identified as the major indicators of the resilience of each cover system [13]. Ratings were provided for the CCL and EGM based on the values for each of these aspects for the clay and HDPE geomembrane as provided by Zhang et al [13]. However, for the CCL-GM, the values were provided on a judgement basis, depending on the relative performance compared with the other two systems.…”

Section: Resilience Assessmentmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Subtitle D Covers and Exposed Geomembrane Cover for Landfills: Sustainability and Resiliency

Janga,

Reddy

2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Exposed geomembrane covers (EGMs) are considered as suitable alternatives to traditional subtitle D soil covers with compacted clay layers (CCL) for landfill cover applications. Compared to CCLs, which comprise various layers, including vegetation, erosion soil layers, and barrier liners, EGMs offer benefits such as reduced resource use. There are several risks associated with cover systems, ranging from climate-related shocks or stressors such as earthquakes, droughts, and floods to local shocks such as excessive differential settlement due to the uneven degradation of waste mass. Hence, their resilience and sustainability must be analyzed, particularly considering the escalating impact of climate change and the growing need to integrate resilience and sustainability principles into engineering designs and operations. This study comparatively assessed the resilience and sustainability of three cover systems: EGM, soil cover with geomembranes, and soil cover without geomembranes. A ((tiered quantitative life cycle assessment of sustainability and resilience) framework was employed. The resilience assessment was performed using a rating system, considering the technical performance of the cover systems, along with the environmental, economic, and social implications of the failures. Subsequently, a comprehensive sustainability assessment encompassing environmental, economic, and social dimensions was conducted. A life-cycle assessment of all cover systems was performed to evaluate environmental sustainability, and a cost-benefit analysis was employed to compare their economic aspects. Social sustainability was evaluated using a rating system. The assessments were combined to develop an integrated sustainability and resiliency index. EGM was the most resilient and sustainable alternative for landfill cover systems compared to traditional soil covers. These insights enable an objective comparison of resilience and sustainability, facilitating informed decision-making.

show abstract

Section: Resilience Assessmentmentioning

confidence: 99%

Section: Resilience Assessmentmentioning

confidence: 99%

Evaluation of Subtitle D Covers and Exposed Geomembrane Cover for Landfills: Sustainability and Resiliency

Janga,

Reddy

2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…By replacing conventional materials, GCLs help conserve resources, mitigating waste and associated risks. Their efficient installation, capac-ity for pollutant containment, and adherence to regulations all contribute to ecological conservation and the reinforcement of climate resilience [7][8][9][10][11][12][13][14]. However, when bentonite swelling is highly suppressed under aggressive liquid, the hydraulic conductivity can approach hydraulic conductivities like silty sand (~10 −6 m/s) [10,[14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Pore Scale Simulation of Rheology Properties on Residence Time of Polymer Hydrogel and Hydraulic Conductivity of Bentonite Polymer Composite Geosynthetic Clay Liners

Li,

Zhang,

Hou

2023

Sustainability

View full text Add to dashboard Cite

Flow in an idealized bentonite polymer composite geosynthetic clay liner (BPC-GCL) containing bentonite comprising two idealized circular granules was simulated using a COMSOL hydrodynamic model. The effect of the polymer rheology properties, including viscosity, surface tension, and contact angle, on the hydraulic conductivity of BPC-GCLs was investigated. The results showed that the hydraulic conductivity of BPC-GCLs significantly decreased by 2–4 orders of magnitude with polymer loadings of 3.3%, 6.5%, and 9.8% compared to conventional geosynthetic clay liners (GCLs). The polymer rheology properties are critical to the residence time and the hydraulic conductivity of BPC-GCLs. The residence time increases with the viscosity, surface tension, and contact angle of polymer hydrogel. In the overall study, the hydraulic conductivities increased significantly from 2.80 × 10−9 m/s to 1.40 × 10−7 m/s when the residence time was insufficient. When the viscosity of the polymer hydrogel is 5000 Pa∙s, 1 × 104 Pa∙s, and 1 × 105 Pa∙s, the residence time of the polymer hydrogel in the domain of BPC-GCLs is 14 min, 23 min, and 169 min, respectively. When the surface tension of the polymer hydrogel is 0 N/m, 0.01 N/m, and 0.02 N/m, the residence time of the polymer hydrogel in the domain of BPC-GCLs is 9 min, 17 min, and 23 min, respectively. When the contact angle between the polymer hydrogel and the NaB granules is 30° to 60°, the residence time of the polymer hydrogel in the domain of BPC-GCLs is 9 min and 33 min. These few minutes can approximate the actual passage of several days in physical time. When the viscosity, the surface tension, and the contact angle are higher than 1 × 106 Pa∙s, 0.03 N/m, and 60°, the residence time of the polymer hydrogel in the domain of BPC-GCLs tends to be very long, which means that a very low hydraulic conductivity of BPC-GCLs can be maintained in the very long term. This research unveils a nuanced and profound correlation between the rheological properties of the polymer hydrogel and the resulting hydraulic conductivity. This discovery enhances the understanding of the potential to tailor hydrogel characteristics for BPC-GCLs. The advanced model developed in this study also lays the groundwork for constructing a more realistic model that considers irregular geometries, interconnected pores, and diverse polymer distributions within the pore spaces.

show abstract

Modeling and Analysis of the Sustainable Development of Chinese Archival Work in the Past Four Years

Liang

Chen²

2022

Applied Sciences

View full text Add to dashboard Cite

People used physical or pictorial note-taking methods to record and memorize in ancient times. With the development of productive forces, the emergence of classes, the formation of the state, and the invention of writing, many official documents appeared and were sorted, which then became archives. The natural attributes of archives are closely related to the development of human society. On the one hand, archival work develops with the development of human society. On the other hand, the status of archival work will affect the development of civilization as well. To fill the gap in the research on the sustainable development of archival work, we established a comprehensive evaluation model to analyze the development of Chinese archival work from 2018 to 2021. We found that the overall level was gradually flourishing and was less affected by the COVID-19 pandemic, but there is still a lot of room for improvement in some aspects. This study provides valuable insights for formulating targeting strategies to improve the development of archives.

show abstract

Selection of Landfill Cover Materials Based on Data Envelopment Analysis (DEA)—A Case Study on Four Typical Covering Materials

Cited by 3 publications

References 56 publications

Evaluation of Subtitle D Covers and Exposed Geomembrane Cover for Landfills: Sustainability and Resiliency

Evaluation of Subtitle D Covers and Exposed Geomembrane Cover for Landfills: Sustainability and Resiliency

Pore Scale Simulation of Rheology Properties on Residence Time of Polymer Hydrogel and Hydraulic Conductivity of Bentonite Polymer Composite Geosynthetic Clay Liners

Modeling and Analysis of the Sustainable Development of Chinese Archival Work in the Past Four Years

Contact Info

Product

Resources

About