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ARC-Challenge / Mercury_416593 / In 2014, a break in a storm water pipe released thousands of gallons of coal ash…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

In 2014, a break in a storm water pipe released thousands of gallons of coal ash from a retired electrical plant into a river. The spill occurred upstream from the water treatment plants that serve communities along the river. Coal ash contains several hazardous metals including arsenic. Which stage of the water treatment process is most likely to remove hazardous metals from the water?

choices

  • aeration
  • coagulation
  • disinfection
  • reverse osmosis

Discussion

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Source and history

upstream_id / Original problem ID
Mercury_416593
task_id
c8e651c1-80b6-5803-bbe8-383ce651999b
task_key
ARC~2dChallenge--test--Mercury~5f416593
task_revision_id
1
config / split
ARC-Challenge / test

Official source

initial import