摘要
在南京市经济技术开发区选取半径1 km区域,于各金属制品厂、电子厂、印刷厂等周围路侧布设共60个监测点,分6批次采集表土样品360个,测定样品重金属锌、铬、铅、镍的浓度,采用单因子指数法和内梅罗综合指数法分析评价该区域污染程度,分析各重金属浓度在监测期间的时间变化规律。结果显示,样品中锌、铬、铅污染指数均在0.4以下,不存在污染;镍(Ni)元素污染指数在1.0附近波动,污染程度介于无污染与轻度污染之间;监测区综合污染程度较低。且随时间推移,样品中4种重金属浓度均呈现反复增减的波动性规律,仅镍(Ni)元素第6次样品数据轻度偏离规律,初步分析导致出现此规律的原因为路域植物对土壤重金属元素吸收固化作用。
In the economic and technological development zone of Nanjing ,60 monitoring sites were ar-ranged in road area of every metal products factory ,electronics factory and printing plant in a 1 km radius area,a total of 360 topsoil samples were collected for six times .The concentrations of heavy metals （ Zn, Cr,Pb,Ni） were measured ,for the analysis and evaluation of the pollution condition by methods of single factor index and Nemerow index .And the change rules of the concentration of heavy metals during the pe-riod of monitoring time were analyzed .The results showed that indexes of Zn ,Cr and Pb in topsoils were under 0.4,no pollution.The pollution indexes of Ni were in the vicinity of 0.1,and pollution levels were between pollution and light pollution .The comprehensive pollution level of monitoring area was low .And over time ,concentrations of different 4 heavy metals showed a volatility regular of increase and decrease repeatedly ,only the data of sample 6 for Ni deviated from the regular a little bit .According to the prelimi-nary analysis ,the reason was the absorption of heavy metals by plants .
出处
《应用化工》
CAS
CSCD
北大核心
2016年第11期2021-2024,2033,共5页
Applied Chemical Industry
基金
"十二五"农村领域国家科技支撑计划(2011BAD38B0103)
关键词
表土重金属
南京
工业区
路域
短时污染规律
heavy metals in topsoils
Nanjing
industrial zone
road area
short-term pollution rule
