��ɽ��I�B(y��ng)�ݻ��vʷ��I�B(y��ng)��ʵĽ��

��r�g��2014-01-24 10:53 ��Դ��h(hu��n)��ƌW(xu��) ��: ��x��2242

ժҪ��I�B(y��ng)��B(t��i)ϵ�y(t��ng)��ޏ�(f��)��횽��ښvʷ�I�B(y��ng)�ݻ��^�̡��I�B(y��ng)��נ�r�J�R�Ļ��A(ch��)֮��,��Ϻ��н��ɽ��ͬ��^(q��)��4��e�@��M��210Pb/137Cs��,��ˮ��ʧ��,��e�ￂ��,��ЙC̼,��e��ȹź��ӌW(xu��)��,��ָ��(bi��o)��^�õ�һ��,��ӳ�˵�ɽ��(w��n)��ĳ��e�h(hu��n)��,��^ȥ��e��Ⱥ��l(f��)��@��׃��,�S��ɔ_�ļӏ�,��ؚ�I�B(y��ng)�ČٷN��Cyclotellabodanica��C.ocelata,��NAchnanthesminutissima,��Cocconeisplacentulavarlineate��Cymbellasp.��ח��NFragilariapiñata,��F.brevistrata,��F.construensvarventer��ռ��(y��u)�ĽM��^�ɵ��Ը��I�B(y��ng)�ĸ��͌ٷNCyclotellameneghinena��Aulacoseriaalpigena,��C.atomus,��Stephanodiscushantzschi��Thalassiosiravisurgis�Ȟ��ĽM��,��ʾ��@�ĸ��I�B(y��ng)��^��,��Å^(q��)��-��D(zhu��n)�Q��(sh��)�Y(ji��)��,�ؽ��˵�ɽ��^ȥ��100��ĺ�ˮ��׃��Ěvʷ,��еıO(ji��n)�y��(sh��)��(j��)�c��ؽ��Ŀ��ֵ��ȽY(ji��)��-��D(zhu��n)�Q��(sh��)��^�ʴ_��ˮ�w��ם�ȵ�׃��څ��,��һ�N��Ч��ˮ�w��ؽ��ֶΡ��(j��)��ɽ��e��о��ؽ��Ĺ��-ˮ�w��ם�ȽY(ji��)��,��ɽ��ĠI�B(y��ng)��ˮ�w��ֵ��50~60μg·L-1,��e��N,��P��ȵĻ��ֵ��500mg·kg-1��550mg·kg-1,��

�P(gu��n)�I�~��壬��,��I�B(y��ng)��,��e���ɽ��

��ʮ��,��L��˿ڵĄ��͹��r(n��ng)�I(y��)��a(ch��n)�Ŀ��ٰl(f��)չ,���ӵĸɔ_�Ѵ��^��Ȼ�{(di��o)��(ji��)��,��ؽ��S��ǽ��|��͵�ɽ��ȣ��һЩ��Ҫ��̫��ͳ��ȣ��ѳ��F(xi��n)��@�ĸ��I�B(y��ng)��}��ĺ��B(t��i)ϵ�y(t��ng)��L��ε؅^(q��)�ɳ��m(x��)�l(f��)չ��Ҫ��,��B(t��i)�ޏ�(f��)��Փ��20��^�õ��Mչ,��һЩ��ĭh(hu��n)��У��Ͷ��˴��c��,��Ȼ��Ч��΢,��к��Ҫ��һ��ԭ��ȱ��B(t��i)�h(hu��n)��ݻ��נ�r��J�R��O(sh��)��B(t��i)�ޏ�(f��)��u�r��(bi��o)�ʺ�Ŀ��(bi��o)��ƶ��^��,��@�N��r��,��y��B(t��i)�ޏ�(f��)�^�̱��팦��B(t��i)ϵ�y(t��ng)�Y(ji��)��(g��u)�͹��µĔ_�ӣ��ػ֏�(f��)��^ȥ��Ȼ��Ⱥ��,��

��B(t��i)�ޏ�(f��)��Ŀ��,��Ҫ��ܓp��B(t��i)ϵ�y(t��ng)�M��֏�(f��)��ɔ_ǰ��ӽ��ɔ_ǰ��B(t��i)��r��נ�B(t��i)��Q��ʭh(hu��n)��,��Ķ��F(xi��n)ˮ�|(zh��)��B(t��i)�|(zh��)��ĸ��D(zhu��n),��δ_��ޏ�(f��)�ĠI�B(y��ng)��|(zh��)�ą��Ŀ��(bi��o)��ɞ��ƶ��ϵ�y(t��ng)�ޏ�(f��)��ʩ�ͷ��Ҫǰ��,��Ҳ�ǄӑB(t��i),��^�u�r��Ч��Ҫ��(bi��o)��,��Ŀǰ,��H��ڽ��B(t��i)�ޏ�(f��)Ŀ��(bi��o)��h(hu��n)��ķ��Ҫ��B(t��i)�h(hu��n)��L�ڱO(ji��n)�y��B(t��i)ϵ�y(t��ng)�Č��ٿv,��(sh��)�W(xu��)ģ�ͷ�,��ź��ӌW(xu��)�ֶΡ��L��ε؅^(q��)��(sh��)��ȱ��L��B�m(x��)��B(t��i)�h(hu��n)��O(ji��n)�yӛ�,��ṩ��ɔ_ǰ��Ȼ��B(t��i)�h(hu��n)��ò,��B(t��i)ϵ�y(t��ng)�Č��ٿv�͔�(sh��)�W(xu��)ģ�ͷ��ǿ��Ŷ��ߵķ��о��Ĉ��h(hu��n)��Ҫ��,��

����D(zhu��n)�d��ǳ��ڂ��f��Ϣ֮Ŀ��,��Ё�Դ��(bi��o)ע�e�`��ַ��ĺϷ��(qu��n)�棬Ո��߳֙�(qu��n)��C��c��W(w��ng)(li��n)ϵ,��҂��r��,��h��x�x,��