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'E-waste pollution' a threat to human health, new research suggests
Date:5/30/2011

In addition to its damaging effect on the environment and its illegal smuggling into developing countries, researchers have now linked e-waste to adverse effects on human health, such as inflammation and oxidative stress precursors to cardiovascular disease, DNA damage and possibly cancer.

In a study published today, Tuesday 31 May, in IOP Publishing's journal Environmental Research Letters, researchers took air samples from one of the largest e-waste dismantling areas in China and examined their effects on human lung epithelial cells.

E-waste, or electronic waste, describes end-of-life electrical goods such as computers, televisions, printers, and mobile phones. Each year between 20󈞞 million tons of e-waste is generated worldwide, 100,000 tons of which is exported from UK shores, according to a recent BBC Panorama programme. A large proportion of worldwide e-waste is exported to China.

Due to the crude recycling process, many pollutants, such as persistent organic pollutants and heavy metals, are released from e-waste, which can easily accumulate in the human body through the inhalation of contaminated air.

After exposing the cultured lung cells to the organic-soluble and water-soluble constituents of the samples, the researchers tested for the level of Interleukin-8 (IL-8), a key mediator of inflammatory response, and Reactive Oxygen Species (ROS), chemically reactive molecules that can cause extensive damage in excess.

The samples were also tested for the expression of the p53 gene a tumour suppressor gene that produces a protein to help counteract cell damage. If there is evidence of this gene being expressed it can be seen as a marker that cell damage is taking place.

The results showed that the samples of pollutants caused significant increases in both IL-8 and ROS levels indicators of an inflammatory response and oxidative stress respectively. Significant increases were also obser
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Contact: Michael Bishop
michael.bishop@iop.org
01-179-301-032
Institute of Physics
Source:Eurekalert

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