Silica sand or quartz sand is a mineral resource with a wide variety of application; glass industry, construction and foundry are the most common examples thereof. The Republic of Croatia has reserves of 40 million tons of silica sand and a long tradition of surface mining and processing. The average annual production of raw silica …
This review highlights the xenophagy-mediated clearance of M. tb involving host E3-Ub ligases and counter-strategy of autophagy inhibition by M.Tb using virulence factors to effectively dampen host-directed autophaky utilizing diverse mechanisms. ABSTRACT Intracellular pathogens have evolved various efficient molecular armaments …
Numerical simulation on sand production in the exploitation process of gas hydrates based on skeleton failure of reservoirs
Organized crime is mining sand from rivers and coasts to feed demand worldwide, ruining ecosystems and communities. Can it be stopped?
Tar sand exploitation is being commercialized globally. With success stories from Canada, Venezuela and U.S.A., other countries tend to follow. Nigerian tar sands, which is similar to Canada's tar sand in terms of chemical composition, water wet nature, etc., has some characteristics which will yield enormous economic benefit when exploited.
Natural gas hydrate (NGH) is widely distributed worldwide with great reserves and is generally accepted as a promising alternative energy source. However, sustainable, efficient, and safe NGH development has been proven to be restricted by a series of geomechanical problems, among which sand production has become prominent and …
This review article provides an overview of research to date with an explicit focus on natural resource exploitation in Western Sahara. It integrates findings from various perspectives and disciplines, and synthesises the research done with a view to revealing gaps and, therefore, potential new research directions. As the issue of natural …
Illicit sand is transported on barges to nearby cities and sells for top dollar. Land erosion has swept away numerous homes, killing residents. We must stop the sale and exploitation of illegal sand in Vietnam to save valuable farming and residential properties. The illegal exploitation of sand has been a growing problem throughout Vietnam.
On a global scale, the sand mining industry is worth $70 billion. Sand Mining or more specifically, illegal sand mining refers to the unabated extraction of sand from reservoirs, beaches, riverbeds and lakes. Although sand mining is legally regulated by law, in many instances it is an illegal activity. Despite the direct impact illegal sand ...
Short-term trials of natural gas hydrate (NGH) have demonstrated that the efficient and safe exploitation of NGH is impeded by sand production. Considering the highly argillaceous characteristics of NGH reservoirs, a refined sand control method has been proposed. The study investigates how to reduce the impact of mudcake plugging …
We aim to be the leading sand equipment manufacturer of innovative design in the oil & gas, livestock, and construction industries.
exploitation of tar sand, this study is therefore concern ed with the following: 1. Evaluation of the hot water/steam stimulation process applied in tar sand exploitation. 2. Environmental impact ...
Semantic Scholar extracted view of "Numerical Simulation on Coupling Behaviors of Sand Production and Mechanical Response during NGH Exploitation by Depressurization from the Argillaceous Reservoir" by Kaixiang Shen et al.
The local people are wild with anger that out of Sri Lanka's 12 potential mining sites, it is the Tamil areas of the Northeast that are to be mined, which would cause extensive environmental damage. As a …
The paper is focused on the problem of determining the optimal exploitation life of the long-lasting mining machinery, such as bucket-wheel excavators, excavators with one working element of large capacity, spreaders, self-propelled transporters, conveyor belts and similar machinery. A concept of approach is presented, and an application of …
The purpose of this paper is twofold: to present an overview of the sand market, highlighting the main trends and actors for production, export and import, and to review the main environmental impacts associated with sand exploitation process. Based on these findings, we recommend different measures to be followed to reduce negative impacts.
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Sand is a resource that is flying under the radar, particularly when it comes to sustainability and equity. It's used all over the world, but we have very limited transparency on where it's coming from. Because of industrialisation and certainly because of increased urbanisation, the demand for sand is booming.
Sand and gravel are being extracted faster than they can be replaced. Monitor and manage this resource globally, urge Mette Bendixen and colleagues.
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Sand and gravel are mined world-wide and account for the largest volume of solid material extracted globally. Formed by erosive processes over thousands of years (John, 2009), they are now being extracted at a rate far greater than their renewal. Furthermore, the volume being extracted is having a major impact on rivers, deltas and coastal and ...
The tar sands are vast oil fields and mines in the Canadian province of Alberta. Seen from the sky, the tar sands reach beyond the horizon and seem to go on forever, resembling a painful scar on the Earth of epic proportions. Nearby riverbeds are visible as water levels strain under industrial use. Chemical runoff pools collect in …
JXSC provides a full beach sand beneficiation that includes gravity, magnetic and electric separation; it's also suitable for zircon, rutile, and ilmenite sand separation.
In Canada, oil sands, oil, and gas exploitation in the Western provinces of Alberta, Saskatchewan, Manitoba, and British Columbia has increased in pace, fuelled by steady global oil prices. While oil resource exploitation has benefits, it has many inevitable costs and spillover effects.
Section "Sand Mining and the Environment" will present major environmental impacts and consequences of sand exploitation based on the analysis of existing literature associated with this issue.
Our systematic scoping review reveals a robust ecological literature on the impacts of sand mining, particularly in terms of geomorphological change and species decline seen across key Asian rivers and deltas. This literature is far richer than that focusing on sand livelihoods, working conditions or sand governance.
In this paper a summary of various researchers work on machine learning and artificial intelligence applications and limitations is showcased for upstream and sectors of oil and gas industry. The existence of this extensive intelligent system could really eliminate the risk factor and cost of maintenance.
We investigated the potential of exploitation of the host farnesylation machinery by 20 bacterial pathogens and an endosymbiont that inject effectors into host cells by elaborate type III–VII secretion systems.
A new book from Duke University Press, " Vanishing Sands: Losing Beaches to Mining," casts light on the shadowy world of sand mining through case studies that illuminate its disastrous impacts ...
Given its consistent quality and adaptability, manufactured sand is a potential sustainable alternative to natural sands. The current rate of coastal sand extraction outstrips the natural replenishment rate of quality sand suitable for standard uses, which makes it unsustainable ( 2 ). Sand plays a pivotal role in three major economic sectors ...
Organizations and individuals exploiting sand and gravel in riverbeds, lakes, and marine areas are obliged to register yards, gathering locations, and types of vehicles and equipment used for exploitation and transportation; Install equipment to monitor the journey and store data and information about the location and travel itinerary of vehicles …
The deep oceans harbor a wide variety of mineral resources that are characterized by their abundance and high quality. Nations worldwide are actively pursuing the exploration and extraction of these resources. This paper provides a concise overview of the mineral resources found in the deep sea, highlighting the challenges associated with …
