Effect of exotic nutrient on anaerobic degradation of hexachlorobenzene in soil
The effects of four kinds of exotic nutrients glucose,acetic acid,ferrous sulfate and ferric chloride and two kinds of their combinations on anaerobic degradation of hexachlorobenzene were investigated at different concentrations of nutrients.The experiments were conducted on the environmental conditions of water submergence.The research results showed that the anaerobic degradation ability of hexachlorobenzene was strengthened obviously at low concentration of nutrient,whether nutrient was added alone or in combination.The strengthen ability was in the sequence of the combination of acetic acid and ferrous sulfate,acetic acid,glucose,the combination of acetic acid and ferric chloride,ferric chloride,ferrous sulfate.The maximum degradation rate of hexachlorobenzene was 62.72％ when the addition concentrations of acetic acid and ferrous sulfate were 8 g/L and 1 g/ L,respectively,indicating that synergism of acetic acid and ferrous sulfate play an important role on the process of anaerobic degradation of hexachlorobenzene.Furthermore,the reason that the degradation rate of hexachlorobenzene is lower at high concentration of nutrient was also studied tentatively.
国家科技期刊平台
NSTL
万方数据
维普
