1992-04-02_REVISION - M1988112

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 4/2/1992
• Doc Name: PN M88-112 TR 4
• From: BATTLE MOUNTAIN GOLD CO
• To: MLRD
• Type & Sequence: TR4
• Media Type: D
• Archive: No

I

LJ

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CYANIDE 21
Table 3. Cyanide effects on selected species of aquatic organisms. All concentrations are shown as
micrograms of hydrogen cyanide per liter (ppb) of medium at start unless indicated otherwise.
Species, concentration,
end other variables
ERects
References
Algae end macrophyles
Alga, Chlorclla sp.
7,3D0 Inhibition of photosynthesis
30,000 Enzyme inhibition
Water hyacinth, Eichhornia crassipes
300,000 Nonphytotoxic in 72 h;
plants contained total cyanide of
6.7 g/kg dry weight (DW), equivalent
to bioconcentration factor (BCF) of x 22
Freshwater aquatic plants, nine No effect on respiratory
species, 65,000, 30-min exposure oxygen uptake in six species of
angiosperms (Myriophyllum sp.,
Potamogeton spp., Elodca sp.,
Ruppia sp., Cabomba sp.);
some e(iect on two species of bryophytes
(Rhynchostegium riparioides,
Fontinalis antipyrctica) and one
species of alga (Cladophora glomerata )
Alga, Microcystis arruginosa
7,990 90%v kill
Alga, Prototheca zop~
3,000 Inhibition of respiration
Alga, Scenedesmus quadricauda
160, as CN" Toxic
Invertebrates
Copepod, Acadia clausi
30 LC50(96 h)
Isopod, Asellus communis
29-40 MATCs
1,834 LC50 (11 days)
Oyster, Crassostrca sp.
150 Motor activity suppressed after 10 min
Daphnid, Daphnia magna
160 LC50(96 h)
Daphnid, Daphnia pules
83 LC50 (96 h)
Amphipod, Cammarus pseudolimnaeus
16-21 MATCs
58 LC50 (96 h) at 20° C
184 LC50 (96 h) at 5.2° C
Amphipod, Gammaru.s pulex
3 LC:50 f 15 h); 502 dead in 14 days
after exposure for 5 h
7.5 LC50 (9 hl; exposure for 66 min results
in 507 mortality 14 days after exposure
15 LC50 (6 hl; exposure for 45 min causes 507
mortality 14 days after exposure
75 LC50 (3 h); exposure for 18 min results
in 507 kill 14 days after exposure
3
2
5
4
2
2
1
2
2, 8
2
10
2
8
8
6
6
6
6
Y
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