福建省兴化湾大气沉降中重金属的测定

ATMOSPHERIC DEPOSITION OF HEAVY METALS TO XINGHUA BAY,FUJIAN PROVINCE

于2004年7月至2005年6月期间分季度对福建省兴化湾大气沉降颗粒物进行采集和分析,并对10种元素的沉降通量(mg.m-2.a-1)进行了计算,其中,Cd:0.08±0.01;Cr:11.63±7.82;Cu:2.72±0.99;N i:7.81±1.18;Pb:3.83±1.96;Zn:14.39±6.58.结果表明,兴化湾大气沉降中重金属的污染状况相对较好.铅同位素研究表明,人们的生产活动可能是大气沉降中Pb污染的主要来源.通过对元素富集因子的计算说明大气沉降中Cd,Pb,Zn,Cr和N i主要为人为来源.

Samples of atmospheric deposition to Xinghua bay were collected and tested from Jul. 2004 to Jun. 2005. The annual atmospheric deposition flux of ten elements in particles were calculated （ Cd： 0. 08±0. 01 ·m^-2·a^-1, Cr： 11.63±7.82·m^-2·a^-1 , Cu： 2.72±0.99mg·m^-2·a^-1, Ni： 7.81±1.18·m^-2·a^-1 , Pb： 3.83±1.96·m^-2·a^-1 , Zn： 14. 39 ±6.58·m^-2·a^-1）. Compared with other sites, heavy metal pollution in atmospheric deposition to Xinghua bay is in a relative better condition. The ration of Pb isotope composition indicates that the pollution of Pb is mainly caused by anthropogenic sources. The enrichment factor of different elements shows that Cd, Pb, Zn, Cr and Ni are seriously affected by human activities.