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Heavy metals contamination of water, soil, and plants around an electronic waste dumpsite

100%

Olafisoye O. B., Adefioye T., Osibote O. A.

Polish Journal of Environmental Studies

2013

tom 22

nr 5

Electronic waste (e-waste) has become a subject of growing environmental concern in developing countries due to legal/illegal import of electronics from developed nations. In this study, concentrations of heavy metals in and around the largest e-waste dumping site in Nigeria, Alaba International Market in Lagos, was investigated. Concentrations of five heavy metals, namely: cadmium (Cd), chromium (Cr), lead (Pb), nickel (Ni), and zinc (Zn) in soil, water, and plant samples during the wet and dry seasons were measured using atomic absorption spectrometry (AAS). Samples were collected between October 2011 and May 2012 and digested using standard wet digestion methods. Pb recorded the highest values, while the lowest were found for Cd in all the samples during the dry season. Heavy metal concentrations were generally lower during the wet season due to increased aeration and dilution from rainfall. Results show that the total mean concentrations of the heavy metals decreased with depth in soil samples and distance from the dumpsite. Possible sources of contamination were also discussed. A noteworthy observation was that the concentrations of most of the heavy metals under investigation exceeded maximum permissible levels.

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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 Adefioye T.

1 Masoom M. R.

1 Olafisoye O. B.

1 Osibote O. A.

1 Toufique M. M. K.

1 2016

1 2013

Wyniki wyszukiwania

Heavy metals contamination of water, soil, and plants around an electronic waste dumpsite

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