CORVALLIS, Ore. Much of the world's electronic waste is being shipped to China for recycling and the cottage industry that has sprung up there to recover usable materials from computers, cell phones, televisions and other goods may be creating significant health and environmental hazards.
Scientists from China and the United States have identified numerous toxic elements in the emissions from an e-waste recycling workshop in southern China, which uses low-tech methods to separate reusable electronic components from the circuit boards. It is not an isolated case, the scientists point out; such methods are used all over China.
Results of their study have been published in the journal Atmospheric Environment.
"The most immediate problem is the health of the workers and the people who live in the city," said Bernd R.T. Simoneit, a professor emeritus at Oregon State University and one of the authors of the study. "But this may also be contributing to global contamination. For example, previous studies have found carcinogens in wind-carried dust from Asia."
Simoneit is a widely published scientist who has been involved in numerous studies identifying chemical "signatures" for emissions, including coal smoke, biomass burning, petroleum-based fuels and even the burning of municipal refuse. By using mass spectrometers and other sophisticated instrumentation, the researchers can pinpoint the contributions of specific emissions to the atmosphere.
Their work in China was conducted in Shantou City, a town of 150,000 people located in southern China's Guangdong Province. They collected samples during four working days, when workers were removing the electronic components by heating the circuit boards over grills on stoves burning coal briquettes.
The workshop had 24 stoves along three walls, and an estimated five tons of circuit boards stacked along the fourth wall for processing. Workers would use the grills to
|Contact: Bernd Simoneit|
Oregon State University