摘要
以宁-杭公路南京段为例,对公路环境土壤介质中重金属污染叠加的研究表明,研究区已形成污染的元素为Pb,Co和Cr,污染晕带沿公路延伸方向展布,自公路起向其两侧强度逐渐减弱,扩散范围为140—150m,污染重金属元素有效态占其总含量的3.4—60.6％,主要以交换态和Fe-Mn氧化物态存在。土壤对研究区重金属元素的吸持能力:Pb>Co>Cu>Mn>V>Ni,Cr;重金属在土壤中的解吸能力:V>Co>Pb,污染叠加重金属来源主要为公路机动车辆燃料和轮胎中和所含微量重金属成份。
It demonstrated by the study of this paper that the soil near by Ning-Hang main highway (Nanjing section), as a example of studying heavy metal pollution formed by highway, has been polluted by Pb, Co and Cr. The halo of pollution spreads along the highway as a belt. The halo becomes fainter with the distance away from the highway on the sides. The expanded distance is 140-150m. The efficient speciation of the pollution elements is 3. 4-60. 6% of their total contents and consists mainly of Fe-Mn oxides. The capacity of heavy metals to be adsorbed in soil is in the order as following : Pb>Co >Cu>Mn>V>Ni, Cr and capacity of heavy metals to desorb from the soil in the or-der: V>Co>Pb. The pollution materials come mainly from the fuel and tires of vehi-cles.
出处
《环境化学》
CAS
CSCD
北大核心
1998年第6期564-568,共5页
Environmental Chemistry
基金
江苏省自然科学基金资助项目
