CAJ | 학술논문

通过对南京市区干道行道树3个树种树木年轮中重金属元素Cd、Cr、Cu、Fe、Mn、Ni、Pb、Ti、Zn等9种元素的含量分析,发现自20世纪60年代以来,南京市行道树树木年轮中重金属元素含量总体上均表现出随时间逐渐上升的趋势,特别从1990年开始,南京市行道树树木年轮重金属元素含量的增长规律与南京市机动车的拥有量的变化规律表现出极显著的正相关关系,说明南京市机动车拥有量的增加应该是城市环境污染的主要因素之一.对比分析还发现,元素Cd、Ni、Pb、Zn增长幅度最为显著,可用于环境重金属监测.
통과대남경시구간도행도수3개수충수목년륜중중금속원소Cd、Cr、Cu、Fe、Mn、Ni、Pb、Ti、Zn등9충원소적함량분석,발현자20세기60년대이래,남경시행도수수목년륜중중금속원소함량총체상균표현출수시간축점상승적추세,특별종1990년개시,남경시행도수수목년륜중금속원소함량적증장규률여남경시궤동차적옹유량적변화규률표현출겁현저적정상관관계,설명남경시궤동차옹유량적증가응해시성시배경오염적주요인소지일.대비분석환발현,원소Cd、Ni、Pb、Zn증장폭도최위현저,가용우배경중금속감측.
The concentration and historical changes of heavy metal element of Cd, Cr, Cu, Fe, Mn, Ni, Pb, Ti and Zn in street tree rings in Nanjing city were examined and analysed. It's found that the concentrations of heavy metals in tree rings at different tree species increased significantly from the 1960's to 2007,especially from 1990. It showed that the pollution of heavy metals accumulated during last decades of years. Correlation analysis revealed that significant positive correlation existed be-tween the the concentration of heavy metals in the tree rings and total amount of vehicles in Nanjing. Our findings suggested that the total amount of vehicles increasing might be the main factor leading to the city heavy metal pollution. It's also found that Cd, Ni, Pb, Zn have very significant increase and could be used as ideal indicator of environmental pollution.