Pollution of Mobile and Toxic Mercury in Soils from Wenzhou City

[Objective] To investigate the pollution of mobile and toxic mercury in soils from Wenzhou City.[Method] Hydrochloric acid and ethanol were used to extract mercury from soils.The extractable inorganic mercury was detected by atomic fluorescence spectrophotometry.Total mercury of the extract was detected after extract being oxidized by bromating agent.Total mercury reduced the inorganic mercury and the remaining is organic mercury.[Result] The results showed that the highest content of soil inorganic mercury present to industrial areas,the maximum is 0.018 4 mg/kg in Lucheng industrial area,and the sample in residential areas and scenic shows relatively low level.The organic mercury of all samples except Lucheng have higher level than the inorganic mercury.The regularities of distribution of organic mercury and migration toxicity of mercury were business areasculture and education areasscenic areas industrial areasresidential areas.[Conclusion] Total mercury in urban soils from Wenzhou exceeded the national background values.Organic mercury of mobile and toxic mercury in soils from Wenzhou City is dominant.