In order to understand the current status of soil environmental quality and pollution char-acteristics in the study area,a source-pathway-acceptor screening model was established.26 green spaces were selected,197 soil samples and 26 soil fertility samples were tested,and 60 environ-mental quality indexes and 6 fertility indexes were analyzed.The results showed that 7 metals,3 VOCs,9 SVOCs and petroleum hydrocarbons were detected,and 1 sample exceeded benzo(a)py-rene standard.The soil environmental quality of the public green spaces in the study area was gen-erally good,but anthropogenic disturbance had affected it.The distribution of pollutants was as follows:(a)The maximum and average concentration of heavy metals in the topsoil were general-ly higher than those in the lower layer.(b)Few VOCs were detected,their concentration were low and the detection rate was low.(c)The SVOCs were dominated by PAHs,and the detection number of PAHs in the topsoil is more than that in the lower layer,but the concentration is lower than the lower layer.(d)The minimum and maximum values of petroleum hydrocarbons in top-soil were higher than the lower layer.Based on these,risk control and management measures were proposed from the perspective of human health protection.
关键词
大型城市/公共绿地/土壤污染防治/人体健康风险/模型构建
Key words
large city/public green spaces/soil pollution control/human health risks/model construction
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