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EC number: 231-901-9
CAS number: 7778-39-4
The growth of Spartina alterna was increased at 0.2 mg/l.
In wetlands surface sediments of Louisiana, arsenic (As) concentrations
are levated because of a wide use of inorganic arsenicals as cotton
dessicants and of organic arsenicals as herbicides in rice-producing
areas. Beside this, As levels are even higher in the region of produced
water discharge associated with petroleum hydrocarbon recovery
operations. The uptake, potential bioavailabilty and phytotoxicity of As
to an important wetland species growing in the vicinity of produced
water dischage sites, were studied. The effects caused by As chemical
form and concentration on growth, tissue concentrations and distribution
of As and nutrient elements were studied in Spartina alterniflora
growing on hydroponic conditions. An experiment was conducted with
treatments consisting of four As concentrations (0, 0.2, 0.8 and 2 mg
As/l) as arsenite [As(III)]. An As level in the nutrient solution of 0.2
mg/l was safe or caused no toxic effects for this marsh grass (it did
not reduced plant growth or interfere with plant nutrition). In fact,
arsenite significantly increased total dry biomass production at an
application rate of 0.2 mg/l.
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