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Geochemical and geophysical study of historical Zn-Pb ore processing waste dump areas [southern Poland]

100%

Cabala J., Zogala B., Dubiel R.

Polish Journal of Environmental Studies

2008

tom 17

nr 5

693-700

This paper presents the results of mineralogical, geochemical and geophysical studies of Zn-Pb processing waste dump stored at the turn of the 19th and 20th centuries. The mineral composition of wastes was identified using the XRD method, the contents of Zn, Pb, Fe, Mn, Cd, and Tl were determined using the AAS method, whereas the characteristic features of metalliferous grains were examined using the ESEM method. High geochemical mobility of these metals reduces plant succession and brings about the pollution of the former Zn-Pb ores mine areas. High contents of Zn-Pb-Fe sulfides and unstable, hydrated Pb, Fe, Pb-Fe sulfates result in distinctly raised levels of heavy metals (Zn 121,501 mg kg⁻¹, Pb 208,869 mg kg⁻¹, Cd 477 mg kg⁻¹). Various waste types and surrounding Triassic or Quaternary deposits differ significantly in mineral composition, and consequently in physical properties such as electrical conductivity of top soil horizons. This enabled using geoelectric methods for the purpose of this study, and contouring mine wastes in the polluted areas. The field geophysical survey was carried out with a high-resolution conductivity meter (Geonics EM31-MK2).

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Protecting environment, managing e-waste and ensuring development: perspective on ‘waste electrical and electronic equipment’ situation in Guiyu, Agbogbloshie and Dhaka

100%

Masoom M. R., Toufique M. M. K.

International Letters of Natural Sciences

2016

tom 52

Fast development of the electronics industry and an eminent value of obsolescence of the electronic productions conduce to the uninterrupted production of great amounts of electronic waste or e-wasteworldwide. Due to the frequent commingling of a wide range of reusable, or recyclable, and non-recyclable surplus electronics, the term "e-waste" infer all sorts of these leftovers. Even though the economic benefits are potentially enormous, only a small proportion of the electronic waste is being recycled all around. There is a transaction cost associated with the recycling process due to the environmental protection regulations, hence economically less attractiveat the industry level in developed nations. However, to the least developed nations where owing to low living standard the demand for the better quality environment is low, even nonexistent, recycling e-waste has become a livelihood earning opportunity. The study intends to interpret the socio-economic consequences of e-wastes by focusing the detrimental effects that it have created in China and Ghana, and attempts to outline what developing nations like Bangladesh can do to prevent or reduce the harmful consequences of it.

Ograniczanie wyników

1 International Letters of Natural Sciences

1 Polish Journal of Environmental Studies

1 Cabala J.

1 Dubiel R.

1 Masoom M. R.

1 Toufique M. M. K.

1 Zogala B.

1 2016

1 2008

Wyniki wyszukiwania

Geochemical and geophysical study of historical Zn-Pb ore processing waste dump areas [southern Poland]

Protecting environment, managing e-waste and ensuring development: perspective on ‘waste electrical and electronic equipment’ situation in Guiyu, Agbogbloshie and Dhaka