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Lausanne tackles toxic soil after impact discovery

The situation of eating homemade food, which has a nasty impact on children, is unprecedented in wealthy Switzerland, which boasts the image of pristine mountains, lakes and meadows.

Lausanne, the capital of Olympic sports overlooking Lake Geneva, is upset after discovering that much of its soil is contaminated with toxic compounds released by old incinerators.


The situation of having a nasty impact on children and eating homemade food is unprecedented in wealthy Switzerland, which boasts pride in pristine mountains, lakes and meadows.

The household waste incinerator in the fourth largest city in the Alps, which has been closed since 2005, is blamed for the fall of dioxins.

Dioxins, which belong to the so-called “dirty dozen” dangerous chemicals known as persistent organic pollutants, can be highly toxic. They have been shown to affect several organs and systems.

This problem was discovered by chance in a new ecosystem allocation planned in the city from January to May this year.

For years, pollution monitoring has focused on air and water.

“We weren’t looking for dioxins, so we didn’t find them,” Natacha Ritzov, an environmental city council member, told AFP.

Discovery triggered soil Analytical measurements at 126 sites in the city. Experts also noted the risks associated with exposure to contaminated soil.

Pollution map

The city has a concentration of 20-50 nanograms in soil (

The city has issued a map showing four concentric rings. In the zone, the concentration in the soil is 20 to 50 nanograms (ng) per kilogram, 50 to 100, 100 to 200, and more than 200 in the center.

This week, Lausanne announced that these studies found that dioxin levels and the extent of the affected areas were far worse than previously thought.

The city has issued a map showing four Concentric ringThere are zones with concentrations in soil of 20-50 nanograms (ng) per kilogram, 50-100, 100-200, and more than 200 in the center. 640 peaks recorded City center..

The affected zone extends 5.25 km (3.2 miles) inland and is approximately 3.6 km wide.

People are instructed to wash fruits and vegetables grown in the garden or farm, and to wash their hands after touching the soil.

In zones where the toxicity per kg exceeds 100 ng, the root vegetables grown in the area need to be washed and peeled. Do not eat soil-grown zucchini, cucumbers, gherkins, pumpkins, bone marrow, or melons.

In all affected zones, people should not eat soil-raised chickens or provide or sell eggs from such chickens, but only people in zones 20-50 eat eggs. You can-only once a week.

Parents must also stop babies under the age of 4 from ingesting soil, for example by touching their mouth after playing on the ground.

Warning signs are set up around the city’s parks and playgrounds.

The situation has a nasty effect on children

This situation has a nasty effect on children.

“Tempt the devil”

Concentric circles appear to connect to only one source.

“I immediately suspected that the cause was related to the previous incinerator,” Litzistorf said.

The Baron factory was opened in 1958 and was initially welcomed as a way to dispose of city waste.

“At that time, it was considered much better to install a waste incinerator in the city center to protect rural agriculture,” Litzistorf explained.

Dioxin pollution dates back to 1958-1982, when Baron filters were upgraded to environmental standards.

Didier Burgi, who owns a plot of vegetable fields, said the discovery raised questions among veteran home growers.

“We’re not going to eat squash. We don’t have a lot of them, but we have specific information about them and we’re not going to seduce the devil,” he told AFP. ..

Major chatterard assignments by the new football stadium on the edge of cityI heard that there are measurements less than 20ng on Thursday.

In zones where the toxicity per kg exceeds 100 ng, the root vegetables grown in the area need to be washed and peeled.

In zones where the toxicity per kg exceeds 100 ng, the root vegetables grown in the area need to be washed and peeled.

Plot holder Jose Torres compared his imperfect tomatoes to the perfect tomatoes in the supermarket.

“Everything you buy is full of chemicals,” he said. “From my plan, I know what I’m eating.”

Jacqueline Felder cultivated beans, spinach, lettuce and carrots in the afternoon sunshine, saying, “I’ve been growing vegetables for 15 years. Don’t worry.

“People are afraid of everything these days.

“The earth is our mother. Please respect it.”

Next step

The World Health Organization states that short-term exposure to high levels of dioxins can result. Skin lesions, Chloracne, mottled darkening of the skin, changes in liver function, etc.

Long-term exposure is associated with disorders of the immune system, developing nervous system, endocrine system, and reproductive function.

Litzistorf said no one is moving forward with the physical condition associated with dioxin contamination.

However, the issue of potential liability remains unresolved, and the question of what to do next remains unresolved. Dioxin The hunt expands.

Whether soil can be purified on such a large scale is “a question everyone is asking,” Litzistorf said, along with who, how, and how much it costs.


Dioxin prediction and control


© 2021 AFP

Quote: Lausanne discovered shocks obtained on October 16, 2021 from https: //phys.org/news/2021-10-lausanne-tackles-toxic-soil-discovery.html (October 16, 2021) Later work on toxic soil

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Lausanne tackles toxic soil after impact discovery

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