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Table    Summary of Aquatic Toxicity of Potassium oxide/ Dipotassium oxide on Aquatic Organisms

AquaticToxicity

Organism

Species

Test Duration

Result(mg/L)

Test material

Reference

Short-term toxicity to fish

Fish

 

Labeo rohita 

 

96hr

 

 

LC50= 917.6 mg/l

 

Potassium oxide

Palanisamy,R., and G. Kalaiselvi.,1992

Pimephales promelas

96hr

LC50=880 mg/l

Potassium chloride

Mount, D.R.,et al, 1997

Fishes species

(freshwater fish)

96hr

LC50= 16062.827 mg/l(calculated)

Potassium oxide

EPA, 2011

 

Long-term toxicity to fish

Fish

Fishes species (freshwater fish)

30 day

NOEC =1086.545 mg/l (calculated)

Potassium oxide

EPA, 2011

 

Heteropneustes fossilis

40 day

 

NOEC = 2000 mg/l

Potassium oxide

Srivastava,P.N., and A.S. Narain, 1985

Pimephales promelas

7 day

 

NOEC=500 mg/l

Potassium chloride 

 

,Q.H., J.M. Lazorchak, and K.L. Winks, 1996

Short-term toxicity to aquatic invertebrates

Invertebrates

Daphnia magna

48hr

ЕC50660mg/l

Potassium chloride 

Mount, D.R., Gulley, D.D., Hockett, J.R., Garrison, T.D., Evans, J.M., 1997

Daphnid species

48hr

LC50= 6675.5 mg/l(calculated)

Potassium oxide 

EPA, 2011

 

 

Ceriodaphnia dubia

48hr

ЕC50630mg/l

Potassium chloride 

Mount, D.R., Gulley, D.D., Hockett, J.R., Garrison, T.D., Evans, J.M., 1997

Long-term toxicity to aquatic invertebrates

Invertebrates

Daphnid species

30 day

NOEC = 273.134 mg/l (calculated)

Potassium oxide 

EPA, 2011

 

Daphnia magna

21 day

ЕС50 =87mg/l

Potassium chloride 

Biesinger, K., Christensen, G.L..1972

Toxicity to aquatic algae and cyano-bacteria

Algae

Nitscheria linearis

120hr

EC50=1337mg/l (growth rate)

 

Potassium chloride 

Patrick, , R.,, Jr., J., Scheier, A.,1968

Green Algae

30 day

NOEC = 178.832 mg/l (calculated)

EC50= 1368.296 mg/l (calculated)

Potassium oxide 

EPA, 2011

 

Toxicity to aquatic plants other than algae

aquatic plants

аquatic plants other than algae

30day

NOEC = 178.832 mg/l (calculated)

EC50= 1368.296 mg/l (calculated)

Potassium oxide 

EPA, 2011

 

Toxicity to microorganisms

Microorganisms

Photobacterium phosphoreum

15min

EC50= 22 mg/l

potassium hydroxide

Bulich AA et al, 1990