CE 3231 - Introduction to Environmental Engineering and Science Readings for Next Class : O hio N orthern U niversity Introduction Chemistry, Microbiology.

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CE Introduction to Environmental Engineering and Science Readings for Next Class : O hio N orthern U niversity Introduction Chemistry, Microbiology & Material Balance Water & Air Pollution Env Risk Management Arsenic and Bangladesh The largest mass poisoning event in human history is currently occurring in the Bengal Delta due to the presence of arsenic in groundwater wells used for drinking water. More than 50 million people are impacted and the problem is as much the fault of relief efforts as it is an unlucky happenstance. Here is the story….

Lecture 8 Arsenic in Bangladesh (Chemistry V)

Organic Chemistry Review

Arsenic Source = nature FeAsS – arsenopyrite ore As 2 S 3 – orpiment mineral As 4 S 4 – realgar mineral

Arsenic Toxicological Properties ~ 42 mg of arsenic trioxide will kill an adult Acute and chronic systemic effects Established carcinogen Zero acceptable exposure level – Current regulation (10 ppb)

Bangladesh million people, density of ~ 1000 people/km 2

Arsenic Poisoning in Bangladesh Arsenic: The Largest Mass Poisoning in History

Arsenic Poisoning in Bangladesh The Cause

Arsenic Poisoning in Bangladesh Engineered Solutions