نتایج جستجو برای: due to environmental problems caused by mining activities

تعداد نتایج: 12446676  

2017
Rajchandar Padmanaban Avit K. Bhowmik Pedro Cabral

Mining for resources extraction may lead to several geological and associated environmental changes due to ground movements, collision with mining cavities and deformation of aquifers. Geological changes may continue in a reclaimed mine area, and the deformed aquifers may entail a breakdown of substrates and an increase in ground water tables, which may cause surface area inundation. Consequent...

Journal: :Sustainability 2022

Mining is one of the oldest economic activities mankind. Within this activity, artisanal and small-scale gold mining (ASGM) most studied sectors due to its high level environmental contamination social problems it causes. In recent years, ASGM in northern Amazon Ecuador has increased significantly, studies that describe current situation impact are scarce. sense, present study aimed analyze sta...

2010
Bing Zhang Di Wu Quanjun Jiao Qingting Li

Mining activities have caused serious heavy metal pollution in soil and water resources. The weathering mullock and mining tailings transport the heavy metal in polluted areas into ambient soil, rivers, and groundwater, which destroys the surrounding ecosystem. The menace of heavy metal elements in minerals can lead to botanical variety and impact vegetal growth. With the development of remote ...

2015
Mohammad Javad Moradian Behnaz Rastegarfar Mohammad reza Rastegar Ali Ardalan

On June 2, 2014 a sandstorm hit Tehran, the capital city of Iran which killed 5 and injured 44 people. The early warning system did not operate properly and the alarm was not transferred to at risk population and the related organizations in time and in a right manner. Additionally, people who were exposed to the winds didn't know the appropriate safety measures. Focusing much more on establish...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

abstract in first part of this project, the use of a new and biguanid-like catalyst supported on silica as a recyclable catalyst provides a new route for the synthesis of a variety of arylalkylidene rhodanine derivatives through knoevenagle reaction in at present of solvent at room temperature. rhodanine derivatives and especially arylalkylidene rhodanines have proven to be attractive compound...

Journal: :Scientific Notes of Taurida National V.I. Vernadsky University. Series: Economy and Management 2020

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The growing population led to greater human need to use natural resources such as sand and gravel mines. Direct removal of sands from the bed river leads to increase suspended sediment concentrations in downstream of harvested area and creates other problems viz. filling reservoirs, change in hydraulic characteristics of the channel and environmental damages. However, the range of temporal and ...

Journal: :Environmental monitoring and assessment 2007
Mrinal K Ghose

The increasing trend of opencast coal mining in India tends to release huge amounts of dust. But there is no well-defined method of estimating dust emission due to different coal mining activities. This paper examines the sources of dust emission due to coal mining activities, and focuses on the quantification of dust emission with the development and use of emission factors. Because of their s...

2017
Carlos A. Jerez

Mining activities have been carried out for thousands of years and nowadays have an enormous worldwide use to obtain important metals of industrial use. These include copper, iron, gold and several others. Although modern mining companies have sustainable mining programs that include tailings management and external verifications, it is recognized that these industrial activities are responsibl...

Journal: :محیط شناسی 0
مهندس رامین معماریان

in this research by taking advantage of degradtion model ina grid system an area of 9222 km in eastern part of tehran province including eslam shahr , rey , varamin , damavand , and firooz kooh were studied . the results show that 43.8 % of the area , due to its natural condition , is not suitable for development. the rest of the area ( 42.5) due to the degradation caused by man's activiti...

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