Pollution Assessment and Content of Heavy Metals in Latosol in Hainan Island

摘要

In this thesis,a series of samples collected during the survey in latosol in Hainan island are analyzed to reveal the content distribution of heavy metals.And use of Geoaccumulation and N.L.Nemerow to evaluate the pollution of heavy metal in latosol.Through the geological cumulative index we can know,Cr,Zn,Pb elements in pollution-free to light pollution degree phase,Among them Cr element close to light pollution levels; Ni,Cd elements are in light pollution levels; Cu,As elements was in light pollution to heavy pollution stage.Using the latosol background value as evaluation standard,found Cd elements in the study area has reached the level of heavy pollution,Ni element does not cause soil pollution,Cr,Cu,Zn,As,Pb elements reached a level of light pollution in study area; 7 kinds of Heavy Metal Pollution Index in the order of Cd＞Pb＞Zn＞Cu＞As＞Cr＞Ni.Using soil environmental quality standards,found most of the heavy metal element reach the national secondary standard,But individual elements in separate areas reach light pollution levels.In some areas the soil is not polluted,however,some heavy metals reach the warning value,These areas should pay attention to.