Danger Dust

243 readers

121 users here now

A community for those occupationally exposed to dusts, toxins, pollutants, hazardous materials or noxious environments

Dangerous Dusts , Fibres, Toxins, Pollutants, Occupational Hazards, Stonemasonry, Construction News and Environmental Issues

#Occupational Diseases

#Autoimmune Diseases

#Silicosis

#Cancer

#COPD

#Chronic Fatigue

#Hazardous Materials

#Kidney Disease

#Pneumoconiosis

#The Environment

#Pollutants

#Pesticides

and more

Please be nice to each other and follow the rules : []https://mastodon.world/about

founded 1 year ago

MODERATORS

Bampot

Sources of lead in a Tibetan glacier since the Stone Age (www.nature.com)

submitted 2 months ago by Bampot to c/dangerdust

0 comments fedilink hide all child comments

The Tibetan Plateau glaciers, among the world’s most remote and pristine places, provide water to millions and play a vital environmental role.

We measured the lead isotopic composition in a dusty ice core from the Guliya ice cap in northwest Tibet, from approximately 36 thousand years Before Present (Stone Age) to 2015, to determine the onset and sources of anthropogenic lead.

Despite the dust-laden nature of the core, a clear change in the lead isotope signature to below Stone Age levels started in 1949 followed by a rapid decrease in 1960 and an even more rapid decrease in 1974 indicating the first emergence of anthropogenic lead.

Accurate isotopic lead measurements allowed us to better, and more sensitively, quantify sources using a Bayesian mixing model.

Chinese gasoline was the primary anthropogenic source surpassing natural contributions in the 2000s until 2007 when emissions from leaded gasoline decreased and those from coal and lead-zinc ores increased.

no comments (yet)

sorted by: hot top controversial new old

there doesn't seem to be anything here