As Eh pH

As Eh pH



Fig. 8.45 Eh~pH diagram for arsenie, the broken linę represents the boundary

linę for barium arsenale.


HAsO|"


oxidotion


HAsOj'


-H


pH 8-9


pH 6-7 j


Epilimnion

Thermocline


HAsOl'

reduction

■fł

H2AsO«

”//

^^obsorption

odsorption

AS$2

i i Drtci

'\svsreductiofł>^^

preeipilation

Hypolimnion

A o    '    f’®AS04

As2S3    (CHJ, As ^mcthylotion

-5 3


Sediments


Fig 8.46 Speciation of arsenie in a stratified lakę. Source of data; Ferguson


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