【摘要】 采用连续浸取法和火焰原子吸收分光光度法,研究了桂林市郊5个不同区域的菜地土壤、蔬菜铅污染,以及土壤铅的7种存在形态,讨论了各种形态铅对环境的影响.在铅形态的分布中以残渣态铅含量最高(20.986×10-6),占7种形态铅总量的44.36%,其次为无定形氧化铁结合态和晶形氧化铁结合态,分别占总铅量的17.07%、12.42%,而交换态、碳酸盐结合态、无定形氧化锰结合态和有机态铅的含量较低,各自占总铅量均小于10%.更多还原

【Abstract】 Seven species of lead in soil samples,gathered from five areas at Guilin suburbs,are determined by the method of subsequent leaching-species analysis and flame atomic absorption spectrophotometry.Among the seven species Pb content(20.986×10^-6) is found containing high Pb residue,which makes up 44.36 % of the total lead of the 7 species.The second is the compound bounded with amorphous ferric oxide and crystalline ferric oxide,about 17.07% and 12.42% of the total Pb.Each of the four species,or exchangeable,carbonate,manganic oxide and organic,is less than 10% of the total Pb.更多还原