园林植物对大气铅、镉污染物吸滞能力的比较

Absorption and purification ability of garden plants to heavy metal Pb and Cd in the atmosphere

研究测定了部分城市园林绿化树种对重金属中大气铅、镉污染物的吸滞能力。结果表明 :园林绿化树种对大气铅、镉污染物具有一定的吸收净化能力 ,并依污染气体和树种的不同具有明显差异 ;对铅吸收量高的树种有 :桑树、黄金树、榆树、旱柳、梓树 ;吸镉量高的树种有 :美青杨、桑树、旱柳、榆树、梓树、刺槐。

The absorption and purification ability of some green tree species to heavy metal Pb and Cd in the atmosphere is measured and compared. The results showed that the green tree species could absorb Pb and Cd pollutants to different extent depending on specific pollutants and tree species. Morus alba, Catalpa speciosa, Ulmus pumila, Salix matsudana and Catalpa ovata have high absorption capacity to Pb, while Populus nigra var. italica ×Populus cathayana, Morus alba, Salix matsudana, Ulmus pumila, Catalpa ovata, and Robinia pseudoacacia have high absorption capacity to Cd.