【摘要】 根据后石电厂近15年的监测资料,简述了温排海域海水和沉积物中Hg含量的变化情况,并结合6年的脱硫工艺流程监测数据分析了Hg含量升高的原因,最后通过参考文献资料推算出电厂附近海域的底栖生物对Hg的累计效应。分析结果表明:1)在电厂温排海域内,>1℃温升区内沉积物中的Hg含量显著高于≤1℃温升海域;2)脱硫工艺监测结果表明:在脱硫工艺过程中Hg的转化率逐年升高;3)通过文献资料推算出电厂附近底栖生物(牡蛎)体内的总汞(THg)含量为0.488 mg/kg。为降低Hg的暴露风险,建议脱硫电厂温排海域海水中Hg含量不能超过0.110μg/L。更多还原

【Abstract】 In this paper,changes of mercury in drainage waters and sediment from seawaters flue gas desulfurization system of coal- fired power plant were described in the last 15 years,the causes of elevated mercury levels combining with 6 years of desulfurization process monitoring data were analyzed,and the cumulative effect of mercury on the sea bottom dwellers near the power plant were calculated. Analysis results showed that: 1) mercury content in sediment zone of > 1℃ temperature rise was significantly higher than that of ≤1℃ waters in thermal discharge waters; 2) The monitoring results showed that: the mercury rate increased year by year in the desulfurization system; 3) The THg of benthos( oyster) near the power plant was 0. 488mg·kg- 1by calculating with literature data. In order to reduce the risk of mercury exposure,we suggested that the mercury in FGD thermal discharge waters must not exceed 0. 110 μg / L.更多还原