英语翻译50Thetoxicityofacompoundisrelatedtoitsconcentration,thelengthofexposuretime,andthenormalbackgroundconcentration.51Thetoxicityofionsisgenerallyattributedtothecationratherthantheanion.52Thetoxicityand/ori

Question

英语翻译
50 The toxicity of a compound is related to its concentration,the length of exposure time,and the normal background concentration.
51 The toxicity of ions is generally attributed to the cation rather than the anion.
52 The toxicity and/or inhibition actions of some common cations are stimulatory at low concentrations but are toxic at higher concentrations.
Toxicity can be prevented by addition of other cations which act as cation antagonists.
53 For example,the toxic effect of sodium can be reduced by adding potassium and further reduced by adding calcium.
Antagonists are best added as a chloride salt.
54 If antagonists are not available or are too costly,the best method to prevent toxicity may be dilution.
55 Hydrogen sulfide has been recognized to be toxic to anaerobic microorganism,especially methanegens.
56 Under strictly anaerobic conditions ,the sulfate ion( SO2-4) is biochemically reduced to the sulfide ion (S2-) which establishes an equilibrium with the various forms of hydrogen sulfide (H2S ,HS- and S2-).
57 The toxic concentration of total dissolved sulfide in anaerobic digestion has been reported to be 200 to 300 mg/L.

Answer 1

50 The toxicity of a compound is related to its concentration,the length of exposure time,and the normal background concentration.化合物的毒性与以下因素有关：它的浓度、暴露时间、正常背景浓度.51 The to...