银川地区池塘水、鱼的汞污染调查

DETERMINATION OF WATER AND FISH MERCURY IN PONDS OF YINCHUAN AREA

测定青铜峡段面黄河水以及流经银川地区各主干渠和靠近各主干渠直接利用黄河水养鱼的池塘水水汞含量，结果不同水体汞检出率１００％；黄河水及各干渠水汞值０．１４μｇ／Ｌ，池塘新灌水水汞值０．４６μｇ／Ｌ，差异有显著性意义；池塘过冬水水汞值２．９８μｇ／Ｌ，与池塘新灌水水汞值比较差异有极显著性意义。认为利用黄河水养鱼的池塘水受到工业废水污染。银川地区池塘鱼汞检出率为１００％，所检鱼种的鱼汞含量均未超过国家食品卫生标准。

The concentrations of water mercury in Yellow River of Qingtongxia area and major canals running Yinchuan area and fish ponds near the major canals were determined.The results showed that the mean concentration of water mercury in Yellow River and major canals was 0.00014mg/L,lower significantly than 0.00046mg/L in new irrigated ponds,and the mean concentration of mercury in over winter water in ponds was 0.00289mg/L,higher significantly than in new irrigated ponds.It was believed that the ponds water was polluted by industrial waste water.Mercury was found in 100% fishes ponds in Yinchuan area,but its concentration was lower than the national standard.