scholarly journals PROBLEMS IN TRADITIONAL LANDFILLING AND PROPOSALS FOR SOLUTIONS BASED ON SUSTAINABILITY

Detritus ◽  
2020 ◽  
pp. 78-91
Author(s):  
Valentina Grossule ◽  
Rainer Stegmann
Keyword(s):  
Waste Management ◽  
Environmental Sustainability ◽  
Raw Materials ◽  
Storage Quality ◽  
Financial Investment ◽  
Critical Issues ◽  
Long Term Behavior ◽  
Technical Measures

In recent years, the Circular Economy has become the key lynchpin underlying the waste management system. However, the emphasis placed on recycling has led, on one hand, to an underestimation of the critical issues that are currently emerging so dramatically (i.e. limited recyclability of materials, instability of markets for secondary raw materials, and accumulation of contaminants present in the recycled materials), whilst on the other to neglect the inescapable role of landfill in waste management. In many cases, landfills are seen as a simple and economical means of disposing of waste, and from a political, legislative and technical viewpoint they are frequently denied the attention devoted to other engineering works, lacking adequate financial investment to cover the costs required to ensure a sustainable landfill system. Landfill should be designed and constructed in line with the principle of environmental sustainability, by adopting technical measures aimed at guaranteeing waste stability and immobilisation of contaminants over a period of less than one generation and ensuring a Final Storage Quality in equilibrium with the environment. This article summarises the concept of sustainable landfilling, identifies the technical strategies that characterise this system, describes the critical issues frequently encountered after decades of operation and proposes a series of solutions aimed to control long-term behavior.

scholarly journals CO2 Utilization and Long-Term Storage in Useful Mineral Products by Carbonation of Alkaline Feedstocks

2021 ◽  
Vol 9 ◽  
Author(s):  
Renato Baciocchi ◽  
Giulia Costa
Keyword(s):  
Raw Materials ◽  
Mineral Carbonation ◽  
Carbon Utilization ◽  
Waste Streams ◽  
Long Term Storage ◽  
Current State ◽  
Critical Issues ◽  
Term Storage ◽  
Change Mitigation

Accelerated carbonation is a carbon utilization option which allows the manufacturing of useful products, employing CO2-concentrated or -diluted emission sources and waste streams such as industrial or other processing solid residues, in a circular economy perspective. If properly implemented, it may reduce the exploitation of virgin raw materials and their associated environmental footprint and permanently store CO2 in the form of Ca and/or Mg carbonates, thus effectively contributing to climate change mitigation. In this perspective article, we first report an overview of the main mineral carbonation pathways that have been developed up to now, focusing on those which were specifically designed to obtain useful products, starting from different alkaline feedstocks. Based on the current state of the art, we then discuss the main critical issues that still need to be addressed in order to improve the overall feasibility of mineral carbonation as a CCUS option, as well as research needs and opportunities.

scholarly journals The Role of Dispersal in Interacting Patches Subject to an Allee Effect

2013 ◽  
Vol 45 (4) ◽  
pp. 1182-1197
Author(s):  
N. Lanchier
Keyword(s):  
Allee Effect ◽  
Interacting Particle Systems ◽  
Local Population ◽  
Critical Value ◽  
Initial Distribution ◽  
Interacting Particle ◽  
Strong Allee Effect ◽  
Long Term Behavior

This article is concerned with a stochastic multipatch model in which each local population is subject to a strong Allee effect. The model is obtained by using the framework of interacting particle systems to extend a stochastic two-patch model that was recently introduced by Kang and the author. The main objective is to understand the effect of the geometry of the network of interactions, which represents potential migrations between patches, on the long-term behavior of the metapopulation. In the limit as the number of patches tends to ∞, there is a critical value for the Allee threshold below which the metapopulation expands and above which the metapopulation goes extinct. Spatial simulations on large regular graphs suggest that this critical value strongly depends on the initial distribution when the degree of the network is large, whereas the critical value does not depend on the initial distribution when the degree is small. Looking at the system starting with a single occupied patch on the complete graph and on the ring, we prove analytical results that support this conjecture. From an ecological perspective, these results indicate that, upon arrival of an alien species subject to a strong Allee effect to a new area, though dispersal is necessary for its expansion, fast long-range dispersal drives the population toward extinction.

Studies of Ancient Glass and Their Application to Nuclear-Waste Management

MRS Bulletin ◽  
2003 ◽  
Vol 28 (7) ◽  
pp. 500-504 ◽  
Author(s):  
Hannelore Römich
Keyword(s):  
Waste Management ◽  
Nuclear Waste ◽  
Laboratory Experiments ◽  
Glass Composition ◽  
Nuclear Waste Management ◽  
High Potassium ◽  
Ancient Glass ◽  
Long Term Behavior ◽  
High Potassium Content

AbstractDuring several hundred years of burial in the soil, glass objects, especially those with the high potassium content of medieval compositions, develop heavily corroded surfaces, showing phenomena such as local pitting, laminated layers, and browning effects. The long-term behavior of glass in the soil or in contact with groundwater is not only of interest to glass scientists with a background in archaeology, but also for those with a special interest in nuclear-waste management. Several attempts have been made to propose the decomposition of ancient glasses as an indicator for the performance of buried nuclear-waste glasses. In spite of differences in glass composition and exposure conditions, the development of alteration or corrosion layers with time is a common concern, as shown in this article. Laboratory experiments, representing a simplified model for real conditions, offer the possibility for systematic investigations.

scholarly journals Prospects for Social and Economic Development of Coal Mining Regions

2020 ◽  
Vol 174 ◽  
pp. 04021
Author(s):  
Elena Kazantseva ◽  
Natalya Osokina ◽  
Galina Chistyakova
Keyword(s):  
Coal Mining ◽  
Global Economy ◽  
Western Siberia ◽  
Raw Materials ◽  
Social And Economic Development ◽  
The World ◽  
Mining Regions ◽  
Modern Technologies

In recent decades, raw materials companies occupy leading positions in world ratings, largely determining the economic situation of their home countries. The rapid growth of digital companies’ position in the global economy does not detract from the role of raw materials production, which develops using modern technologies and adheres to the principles of sustainable development. The paper analyzes the position of leading foreign and domestic raw materials companies in the world rankings; examines the features of mining regions functioning, in particular, coal mining regions (on the example of the Kemerovo region, Western Siberia, Russia), and the prospects for their long-term development. Proposals for long-term development of coal mining regions are formulated.

scholarly journals The Role of Dispersal in Interacting Patches Subject to an Allee Effect

2013 ◽  
Vol 45 (04) ◽  
pp. 1182-1197 ◽  
Author(s):  
N. Lanchier
Keyword(s):  
Allee Effect ◽  
Interacting Particle Systems ◽  
Local Population ◽  
Critical Value ◽  
Initial Distribution ◽  
Interacting Particle ◽  
Strong Allee Effect ◽  
Long Term Behavior

This article is concerned with a stochastic multipatch model in which each local population is subject to a strong Allee effect. The model is obtained by using the framework of interacting particle systems to extend a stochastic two-patch model that was recently introduced by Kang and the author. The main objective is to understand the effect of the geometry of the network of interactions, which represents potential migrations between patches, on the long-term behavior of the metapopulation. In the limit as the number of patches tends to ∞, there is a critical value for the Allee threshold below which the metapopulation expands and above which the metapopulation goes extinct. Spatial simulations on large regular graphs suggest that this critical value strongly depends on the initial distribution when the degree of the network is large, whereas the critical value does not depend on the initial distribution when the degree is small. Looking at the system starting with a single occupied patch on the complete graph and on the ring, we prove analytical results that support this conjecture. From an ecological perspective, these results indicate that, upon arrival of an alien species subject to a strong Allee effect to a new area, though dispersal is necessary for its expansion, fast long-range dispersal drives the population toward extinction.

scholarly journals The Role of Net Working Capital in the Financing of the Operating Activities of Mining Companies

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Maria SIERPIŃSKA ◽  
Małgorzata KOWALIK
Keyword(s):  
Raw Materials ◽  
Working Capital ◽  
Short Term ◽  
Excess Liquidity ◽  
Current Asset ◽  
Relationship Of ◽  
High Degree ◽  
Operating Activities

The paper examines how companies’ net working capital is used to finance their operating activities. Net working capital is a source oflong-term financing (equity and long-term external capital) and is more expensive than financing through short-term sources, henceits rational use has a significant impact on the efficiency of companies’ operations. The computed level of net working capital is usedto calculate ratios enabling companies to control this capital. The ratios indicate the relationship of net working capital to currentassets, to the sum of accounts receivable and short-term investments, to cash and cash equivalents, and sales revenues. Based on thesecalculations of the relationships, an assessment was made of net working capital engagement in the financing of operating activities inmining companies. These companies maintain a high degree of current asset financing through long-term capital. In mining companieswith diverse mining activities, the level of current assets financing through long-term capital is higher than in coal mining companies.This is due to the maintenance of a higher level of inventories of extracted raw materials, the distance of outlets from the place ofextraction and the method of transport used. Based on the ratio of net working capital to cash and cash equivalents, it was found thatsome companies were overly liquid. Cash balances significantly exceed the value of this capital over a period of three to four years. Asurplus of cash over net working capital in the short term cannot be treated as excess liquidity, as it is the due to flexible managementof this capital.

scholarly journals The role of Culture in Environmental Sustainability

2021 ◽  
Vol 15 (2) ◽  
pp. 259-272
Author(s):  
Burak Çetiner ◽  
Meltem Ince Yenilmez
Keyword(s):  
Sustainable Development ◽  
Built Environment ◽  
Environmental Sustainability ◽  
Critical Issue ◽  
Literature Study ◽  
Sustainable Environment ◽  
Important Idea ◽  
The Subject

Culture's importance is becoming a critical issue in our society. This is because such positions must be clearly defined for sustainable development to become a reality. The society appears to be having some difficulties right now. These factors include urbanization and climate change. The way these issues are solved will have a significant impact on society's future. This paper will examine literature to study the connection or relationship that exists between the built environment, sustainable development, and culture to describe the subject matter of this research. The importance of culture, the built environment, and sustainability will be highlighted in this section. Relevant and valid articles that demonstrate how culture is crucial in any sustainable environment or community will be the emphasis. The literature study explains how culture has a greater impact on societal development in both social and economic terms. Culture plays an important influence in long-term development. In other words, it is a critical component of the process. This is because it oversees assisting people in forming relationships and cultivating the proper attitude in the society in which they live. Sustainable development is an important idea and role in every culture and society. This is due to the fact that it has been discovered to have a good impact on every aspect of an embedded civilization. This paper will attempt to provide a comprehensive examination of culture and its contributions to environmental and sustainability issues. Culture will be considered as a fundamental component of any sustainable environment, as well as a component of the environmental, economic, and social implications of sustainable development.

scholarly journals The Law Enforcement Factors in Waste Management to Achieve Environmental Sustainability and Community Welfare

2021 ◽  
Vol 4 (1) ◽  
pp. 15
Author(s):  
Suwari Akhmaddhian ◽  
Ria Virigianti ◽  
Erga Yuhandra
Keyword(s):  
Local Government ◽  
Waste Management ◽  
Environmental Sustainability ◽  
Government Policies ◽  
Primary Data ◽  
Environmental Damage ◽  
Government Officials ◽  
Program Innovation ◽  
Waste Bank

Environmental issues are interesting subjects that are related to the earth’s sustainability. While Garbage is basically an obstacle, it also has the potential to prevent environmental damage and increase the community's economy if it is well managed. This research aims to analyze local government policies in waste management based on the value of ecological justice to achieve natural preservation. The research method used is qualitative with primary data from interviews and observations supported by laws and regulations related to waste management. The research was conducted in Kuningan Regency and Ciamis Regency. The results showed that the Ciamis local government policy in waste management was equipped with local regulations, government officials, infrastructure, community participation, and program innovation, namely waste sorting, waste bank, maggot, and garbage alms. The conclusion is that local government policies, especially in Kuningan, still need improvement related to optimizing the role of the local government in institutional and funding of waste management and increasing public education regarding waste management. Good waste management can create environmental sustainability and community welfare.

scholarly journals Electronic Waste in China, Japan, and Vietnam: A Comparative Analysis of Waste Management Strategies

2018 ◽  
Vol 9 (1) ◽  
pp. 29-58 ◽  
Author(s):  
Eva Ignatuschtschenko
Keyword(s):  
Waste Management ◽  
Best Practice ◽  
Electronic Waste ◽  
Management Strategies ◽  
Management Approach ◽  
Practice Model ◽  
National Characteristics ◽  
Management Approaches

Abstract This paper comparatively analyses the e-waste sector in China, Japan, and Vietnam by examining progress towards the international best practice model of Integrated Sustainable Waste Management (ISWM) within each country. Through three distinct, yet interdependent dimensions of ISWM (stakeholders, waste system elements, and sustainability aspects), similarities and differences between the three East Asian countries are identified. The analysis shows that the e-waste management approaches differ substantially. The Vietnamese e-waste management approach is least consistent with the ISWM framework, while Japan complies the most with the ideals of the model and Chinese progress towards ISWM is mostly located between the two countries. However, a substantial proportion of Japanese e-waste is exported to developing countries in an uncontrolled manner. The analysis further suggests that the state of development and national characteristics have a significant impact on how the three countries approach e-waste management. In particular, the central role of the informal e-waste sectors in China and Vietnam poses a challenge to the establishment of an effective integrated sustainable e-waste management system. In light of the transnational flow of e-waste in the region, only joint actions will lead to long-term solutions to the increasing threat of e-waste to the environment and human health.

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