香港路边城市公园及花园中的重金属污染。

Heavy metal pollution in roadside urban parks and gardens in Hong Kong.

作者信息

Tam N F, Liu W K, Wong M H, Wong Y S

出版信息

Sci Total Environ. 1987 Jan;59:325-8. doi: 10.1016/0048-9697(87)90455-4.

Abstract

An ecological survey was conducted on metal contamination (including Cd, Pb, Ni, Zn, Cu, Mn and Fe) of vegetation (leaf of Bauhina variegata), surface soil (0-1 cm) and dust (from road curbs) collected at 13 urban parks near busy roads (with heavy traffic volume) in Hong Kong. Samples from roadside parks had significantly higher metal contents than the control site (away from automobile traffic). A close correlation was found between traffic volume and metal contents of leaf, soil and dust. Washing of leaf samples reduced the levels of Cu, Mn, Zn and Fe contamination and suggested that the source of heavy metal pollution was mainly due to aerial deposition from motor vehicles.

摘要

对香港繁忙道路（交通流量大）附近13个城市公园采集的植被（洋紫荆叶）、表层土壤（0-1厘米）和灰尘（来自路缘）中的金属污染（包括镉、铅、镍、锌、铜、锰和铁）进行了生态调查。路边公园的样本金属含量明显高于对照点（远离汽车交通）。发现交通流量与叶、土壤和灰尘中的金属含量密切相关。对叶片样本进行清洗降低了铜、锰、锌和铁的污染水平，表明重金属污染的来源主要是机动车的大气沉降。