摘要
不同的重金属污染物进入饱水的下包气带土层之后,由于其形态和价态变化差异较大,在土壤中的迁移、转化特征有明显差别,其迁移顺序为Cr_2O_7^(2-)>AsO_2^->>Hg^(2+)>Cd^(2+)>Pb^(2+).不同土质对重金属污染物迁移的影响为:在砂土中迁移最快,亚砂土中次之,亚粘土中最慢.
The valence states and the movement of several heavy metals in waterlogged aeration zone of soil were studied and the mobilities of these metal appeared to be in following order,
Cr2O72- > AsO2 > Hg2+ > Cd2+ > Pb2+.
soil structure showed to be an important factor effecting the movement of the metals.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1990年第2期160-172,共13页
Acta Scientiae Circumstantiae
关键词
重金属
污染物
迁移
土壤
饱水
heavy metal
soil
water logged zone
adsorption.
