松花江主要系污染源治理对渔民发汞值影响的研究

在松花江主要污染源根治汞８年后渔民发汞较７０年代下降７８．３０％－８２．５７％，较８０年代初下降７１．４８％．取得了明显的健康效益与环境效益。但至今该地区渔民的发汞值仍超过国家诊断标准。这些渔民发汞仍显著地高于非汞污染区渔民，并有１．９２％渔民的发汞值仍超过国家诊断标准。这些渔民主要分布在三岔河口以下的第一松花江段，而在二松渔民中发汞超过标准者极少，并对其原因作了讨论。

Study on the Level of Mercury in Fishmen's Hair Since the Elimination of Major Sources of Mercury Pollution in the Songhuajiang River

Since the major sources of mercury pollution in theSonghuajiang River were eliminated & years ago,thelevel of mercury in the hairs of fishmen living alongthe river has reduced by 78. 30%-82.5% ascompared with that in the 1970s,and by 71. 48 % ascompared with that in the early 1980s,showing thatobvious health benefit and environmental benefithave been obtained. However,it was found that sofar the fishmen living along the river still have asignificantly higher level of hair mercury than thoseliving in a non-mercury polluted area,and 1.92%of them have a level of hair mercury exceeding thenational diagnostic standards.They were found to bemainly distributed along the first Songhuajiangreaches of the river downstream Sanchahekou.Extremely less number of cases for the fishmenliving along the second Songhuajiang reaches of theriver were found to have a level of hair mercuryexceeding the national diagnostic standards,and thecauses for this were discussed also.