Abstract:Considering that the contradictory results of single factor evaluation may lead to the uncertain degree of soil pollution in the soil heavy metals pollution assessment, matter-element and extension set theories were introduced to establish the matter-element extension model of soil heavy metal pollution. Hakanson toxic response coefficients was applied to modifying the conventional method of multiple super-scale weighting, thusly the weights of different factors would not only reflect the concentration of pollutants, but also be related to heavy-metal toxicity. In comparison with classic method, the new method showed more remarkable correction effect of emphasizing the degree of potential hazards caused by heavy metal. Taking Qingdao city as the study area, the above model with the new approach was used to evaluate the soilheavy metal pollution based on analyzing the contentsof heavy metal elements in the top soil, including Cu, Pb, Zn, Cr, Cd and As in 83soil samples. The results showed that the degree of soil pollution in the study area was mainlyclearnto slight clean, with only a few samples showing light to medium pollution. The evaluated results based on matter-element extension model was consistent with those from traditional fuzzy-mathematical method, confirming the reliability of soil heavy metals pollution assessment for this model.
张晶晶, 马传明, 匡恒, 周爱国. 青岛市土壤重金属污染的物元可拓评价[J]. 中国环境科学, 2017, 37(2): 661-668.
ZHANG Jing-jing, MA Chuan-ming, KUANG Heng, ZHOU Ai-guo. Assessment of heavy metals pollution in soil of Qingdao based on matter-element extension model. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(2): 661-668.